CN103172120A - Preparation method of silicon-coated lithium ion battery anode material - Google Patents
Preparation method of silicon-coated lithium ion battery anode material Download PDFInfo
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- CN103172120A CN103172120A CN2013100431807A CN201310043180A CN103172120A CN 103172120 A CN103172120 A CN 103172120A CN 2013100431807 A CN2013100431807 A CN 2013100431807A CN 201310043180 A CN201310043180 A CN 201310043180A CN 103172120 A CN103172120 A CN 103172120A
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- lithium
- lithium manganate
- anode material
- ion battery
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- 239000010405 anode material Substances 0.000 title claims abstract description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 12
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 12
- 239000010703 silicon Substances 0.000 title claims abstract description 12
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 10
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 10
- 238000002360 preparation method Methods 0.000 title abstract description 10
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 claims abstract description 41
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 22
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
- 238000001035 drying Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 10
- 239000011734 sodium Substances 0.000 claims abstract description 10
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 238000000926 separation method Methods 0.000 claims abstract description 8
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 8
- 239000000243 solution Substances 0.000 claims description 38
- 239000002002 slurry Substances 0.000 claims description 19
- 235000019353 potassium silicate Nutrition 0.000 claims description 12
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 10
- 238000010790 dilution Methods 0.000 claims description 7
- 239000012895 dilution Substances 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- 239000001117 sulphuric acid Substances 0.000 claims description 6
- 235000011149 sulphuric acid Nutrition 0.000 claims description 6
- 229910015645 LiMn Inorganic materials 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 2
- 230000018044 dehydration Effects 0.000 claims description 2
- 238000006297 dehydration reaction Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 229910052717 sulfur Inorganic materials 0.000 claims description 2
- 239000011593 sulfur Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 abstract description 7
- 239000011248 coating agent Substances 0.000 abstract description 6
- 238000009775 high-speed stirring Methods 0.000 abstract description 6
- 239000011159 matrix material Substances 0.000 abstract description 6
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 4
- 238000001556 precipitation Methods 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract 2
- 238000004513 sizing Methods 0.000 abstract 2
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 abstract 1
- 238000009388 chemical precipitation Methods 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 239000002244 precipitate Substances 0.000 abstract 1
- 229910052708 sodium Inorganic materials 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 239000007774 positive electrode material Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 6
- 229910052744 lithium Inorganic materials 0.000 description 6
- 238000007664 blowing Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 238000005303 weighing Methods 0.000 description 5
- 239000008151 electrolyte solution Substances 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 229960001866 silicon dioxide Drugs 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910004309 Li(NixCoyAlz)O2 Inorganic materials 0.000 description 1
- 229910004320 Li(NixCoyMnz)O2 Inorganic materials 0.000 description 1
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 1
- 229910010707 LiFePO 4 Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006388 chemical passivation reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001962 electrophoresis Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 238000002910 structure generation Methods 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a preparation method of a silicon-coated lithium ion battery anode material. The preparation method comprises the following steps of: coating SiO2.nH2O on the surface of a lithium manganate matrix through chemical precipitation, wherein a low-sodium sodium silicate solution and a sulfuric acid solution are added to a high-speed stirring reaction kettle, which is used for mixing up lithium manganate LiMn2O4 sizing agent, for carrying out precipitation reaction; washing the discharged sizing agent after the silicon precipitate is sufficiently reacted; and drying at 100 DEG C to 150 DEG C after the solid-liquid separation to obtain the silicon dioxide-coated lithium manganate anode material. The preparation method disclosed by the invention is low in device requirements, simple in process and environment-friendly. And the anode material is long in cycle life and low in cost.
Description
Technical field
The present invention relates to a kind of preparation method of lithium manganate battery of coating modification method for preparing, especially coated Si of anode material of lithium battery.
Background technology
Lithium cell is as the environmental protection power supply of a new generation, and it has high energy density, the high advantages such as discharge platform, is widely used in 3C and the power tool electronic products such as mobile phone, camera, notebook computer.Along with the technical development of lithium cell, require it to have the characteristics such as high-energy, superpower, high cycle life and low cost.
The positive electrode material of lithium cell is the important component part of lithium cell, is the major effect factor of lithium cell performance, and present business-like positive electrode material mainly contains LiCoO
2, LiMn
2O
4, Li (NixCoyMnz) O
2, Li (NixCoyALz) O
2And LiFePO
4, the lithium manganate price is minimum, security and doubly forthright all better, but common lithium manganate exists John-Teller effect and Mn stripping, coats corrosion resistant SiO
2After, effectively block the reaction of manganese and HF, and can suppress the decomposition of electrolytic solution, the cycle life of material is obviously improved, be applied to power cycle field of batteries widely.
Lithium manganate cell positive electrode material is coated modification mainly to be comprised: coat Al
2O
3, ZnO, TiO
2, MgO, Sn O
2, CeO
2And Coated with Organic Matter, mostly be metal oxide and coat, coat post-processing temperature high, the material electric conductivity after it coats is all relatively poor, and material capacity decreases, and coating easily arrives inner and lithium manganate forms doping.
Summary of the invention
The object of the present invention is to provide a kind of method for preparing anode material of lithium-ion battery of coated Si, the cycle life of positive electrode material is obviously improved.
Realize that technical scheme of the present invention is, have following steps and process,
Step 1: coat,
(1) get the raw materials ready, standby sodium silicate solution, i.e. Na
2OmSiO
2Solution, " m " expression mole number in formula, SiO
2Mass concentration is 3～8%; Standby sulphuric acid soln, h 2 so 4 concentration is 2～4%; Standby lithium manganate slurry, the lithium manganate solid content is 150～200g/L;
(2) reaction, i.e. silicon precipitin reaction, with sodium silicate solution together with sulphuric acid soln and stream add in the reactor that mixes up the lithium manganate slurry, heating, stirring, water glass and sulfuric acid 1:1 are reacted completely, and controlling the pH value is 9～10, and the time of silicon precipitin reaction is 1～4h;
(3) separate, after sufficient reacting is complete, carry out solid-liquid separation, get coated Si O
2.nH
2The lithium manganate of O, in formula, " n " is mole number;
Step 2: dehydration, with step 1 gained coated Si O
2.nH
2The lithium manganate of O drying and dehydrating in microwave drier, temperature are controlled at 100～150 ℃, namely get the lithium manganate of coated silica, i.e. LiMn
2O
4.x SiO
2, in formula, " x " is mole number.
Further, described sulphuric acid soln is that the dense bright sulfur acid of technical grade dilution forms; Described Na
2OmSiO
2Mole number m value preferred 3.0～3.4 in solution.
Further, described LiMn
2O
4XSiO
2Middle mole number x value preferred 2%～9%.
Further, preferred 120～200 r/min of described mixing speed, the temperature of described reaction preferably is controlled at 50～80 ℃.
Further, after drying and dehydrating is complete, the moisture＜preferred value 0.1% of the lithium manganate of described coated silica.
Coated Si O of the present invention
2For the surface coats, the subsequent disposal temperature is low, and positive electrode material good stability, the size distribution of producing are more even, sphericity improves, and granule interior is not exerted an influence, and can effectively extend the service life cycle of positive electrode material, and cost is lower, and over-all properties is good than the positive electrode material of other coatings.
Compare with additive method, the present invention has following advantage:
1. carry out the coating of silicon-dioxide, the subsequent disposal temperature is low, and can not be penetrated into granule interior affects structure generation, and the positive electrode material particle after coating is more even, and sphericity is better.
2. adopt the coating of silicon-dioxide, suppress the formation of passive film, can adsorb the moisture content of electrolytic solution, suppress electrolytic solution in the decomposition of electrode surface, effectively stop electrolytic solution to the corrosion of positive electrode material, the cycle life of positive electrode material is obviously improved.
3. coat as inorganic precipitation coats, more organic positive silicate class coats, and cost is low, and environmental pollution is little, and is easy to operate.Utilize microwave drying, treatment temp is low, less energy consumption, and cost is low.
Description of drawings
Fig. 1 is process flow diagram of the present invention.
Fig. 2 is scanning electronic microscope (SEM) figure of the embodiment of the present invention 1.
Embodiment
The invention will be further described below in conjunction with embodiment." pure water " involved in the present invention mainly refers to resistance greater than the water of 18 megaohms, such as reaching requirement through remove the techniques such as metal ion and other negative and positive magazine ions except silt, carbon absorption, reverse osmosis membrane and electrophoresis.
Embodiment 1:
1. be ready to matrix lithium manganate 800kg, in the reactor of its input with high-speed stirring and chuck system, be mixed with slurry with pure water, its solid content is 160g/L.
2. contain 3% SiO of its molar weight according to the amount preparation of lithium manganate
2Sodium silicate solution, SiO
2Mass concentration be 5.3%, i.e. weighing Na
2O.3.1SiO
2Powder 10.6kg is formulated as the solution of 150 liters.
3. with pure water, sulfuric acid dilution being mixed with mass concentration is 3% solution.
Modulate the lithium manganate slurry, the pH value is controlled at 9.5, temperature is 70 ± 2 ℃, and mixing speed is 120r/min, by 2. solution, the 3. volume pump charging simultaneously of solution, 2. the input speed of solution water glass is 1.0L/min, system pH is controlled at 9.4～9.6, and the complete rear blowing of water glass reaction carries out solid-liquid separation, utilizes microwave to carry out drying slurry, drying temperature is 120 ℃, dry rear material moisture＜0.1%.Finished product is the lithium manganate that coats 3% silicon.
Embodiment 2:
1. be ready to matrix lithium manganate 800kg, in the reactor of its input with high-speed stirring and chuck system, be mixed with slurry with pure water, its solid content is 180g/L.
2. contain 4% SiO of its molar weight according to the amount preparation of lithium manganate
2Sodium silicate solution, SiO
2Mass concentration be 5.3%, i.e. weighing Na
2O.3.1SiO
2Powder 14.13kg is formulated as the solution of 200 liters.
3. with pure water, sulfuric acid dilution being mixed with mass concentration is 3% solution.
Modulate the lithium manganate slurry, the pH value is controlled at 9.6, temperature is 75 ± 2 ℃, and mixing speed is 120r/min, by 2. solution, the 3. volume pump charging simultaneously of solution, 2. the input speed of solution water glass is 1.5L/min, system pH is controlled at 9.5～9.7, and the complete rear blowing of water glass reaction carries out solid-liquid separation, utilizes microwave to carry out drying slurry, drying temperature is 120 ℃, dry rear material moisture＜0.1%.Finished product is the lithium manganate that coats 4% silicon.
Embodiment 3:
1. be ready to matrix lithium manganate 800kg, in the reactor of its input with high-speed stirring and chuck system, be mixed with slurry with pure water, its solid content is 180g/L.
2. contain 5% SiO of its molar weight according to the amount preparation of lithium manganate
2Sodium silicate solution, SiO
2Mass concentration be 6.6%, i.e. weighing Na
2O.3.1SiO
2Powder 17.7kg is formulated as the solution of 200 liters.
3. with pure water, sulfuric acid dilution being mixed with mass concentration is 3% solution.
Modulate the lithium manganate slurry, the pH value is controlled at 9.5, temperature is 70 ± 1 ℃, and mixing speed is 150r/min, by 2. solution, the 3. volume pump charging simultaneously of solution, 2. the input speed of solution water glass is 1.5L/min, system pH is controlled at 9.4～9.6, and the complete rear blowing of water glass reaction carries out solid-liquid separation, utilizes microwave to carry out drying slurry, drying temperature is 120 ℃, dry rear material moisture＜0.1%.Finished product is the lithium manganate that coats 5% silicon.
Embodiment 4:
1. be ready to matrix lithium manganate 800kg, in the reactor of its input with high-speed stirring and chuck system, be mixed with slurry with pure water, its solid content is 180g/L.
2. contain 6% SiO of its molar weight according to the amount preparation of lithium manganate
2Sodium silicate solution, SiO
2Mass concentration be
5.3%, i.e. weighing Na
2O3.1SiO
2Powder 21.2kg is formulated as the solution of 300 liters.
3. with pure water, sulfuric acid dilution being mixed with mass concentration is 3% solution.
Modulate the lithium manganate slurry, the pH value is controlled at 9.5, temperature is 70 ± 1 ℃, and mixing speed is 150r/min, by 2. solution, the 3. volume pump charging simultaneously of solution, 2. the input speed of solution water glass is 1.5L/min, system pH is controlled at 9.4～9.6, and the complete rear blowing of water glass reaction carries out solid-liquid separation, utilizes microwave to carry out drying slurry, drying temperature is 115 ℃, material moisture＜0.1%.Finished product is the lithium manganate that coats 6% silicon.
Embodiment 5:
1. be ready to matrix lithium manganate 800kg, in the reactor of its input with high-speed stirring and chuck system, be mixed with slurry with pure water, its solid content is 180g/L.
2. contain 8% SiO of its molar weight according to the amount preparation of lithium manganate
2Sodium silicate solution, SiO
2Mass concentration be 7.1%, i.e. weighing Na
2O3.1SiO
2Powder 28.3kg is formulated as the solution of 300 liters.
2. with pure water, sulfuric acid dilution being mixed with mass concentration is 3% solution.
Modulate the lithium manganate slurry, the pH value is controlled at 9.7, temperature is 80 ± 1 ℃, and mixing speed is 150r/min, by 2. solution, the 3. volume pump charging simultaneously of solution, 2. the input speed of solution water glass is 1.5L/min, system pH is controlled at 9.6～9.8, and the complete rear blowing of water glass reaction carries out solid-liquid separation, utilizes microwave to carry out drying slurry, drying temperature is 120 ℃, material moisture＜0.1%.Finished product is the lithium manganate that coats 8% silicon.
Claims (5)
1. the method for preparing anode material of lithium-ion battery of a coated Si, is characterized in that, has following steps and process,
Step 1: coat,
(1) get the raw materials ready, standby sodium silicate solution, i.e. Na
2OmSiO
2Solution, " m " expression mole number in formula, SiO
2Mass concentration is 3～8%; Standby sulphuric acid soln, h 2 so 4 concentration is 2～4%; Standby lithium manganate slurry, the lithium manganate solid content is 150～200g/L;
(2) reaction, i.e. silicon precipitin reaction, with sodium silicate solution together with sulphuric acid soln and stream add in the reactor that mixes up the lithium manganate slurry, heating, stirring, water glass and sulfuric acid 1:1 are reacted completely, and controlling the pH value is 9～10, and the time of silicon precipitin reaction is 1～4h;
(3) separate, after sufficient reacting is complete, carry out solid-liquid separation, get coated Si O
2.nH
2The lithium manganate of O, in formula, " n " is mole number;
Step 2: dehydration, with step 1 gained coated Si O
2.nH
2The lithium manganate of O drying and dehydrating in microwave drier, temperature are controlled at 100～150 ℃, namely get the lithium manganate of coated silica, i.e. LiMn
2O
4.x SiO
2, in formula, " x " is mole number.
2. the method for preparing anode material of lithium-ion battery of a kind of coated Si according to claim 1, is characterized in that, described sulphuric acid soln is that the dense bright sulfur acid of technical grade dilution forms; Described Na
2OmSiO
2In solution, mole number m value is 3.0～3.4.
3. the method for preparing anode material of lithium-ion battery of a kind of coated Si according to claim 1, is characterized in that, described LiMn
2O
4XSiO
2Middle mole number x value is 2%～9%.
4. the method for preparing anode material of lithium-ion battery of a kind of coated Si according to claim 1, is characterized in that, described mixing speed is 120～200 r/min, and the temperature of described reaction is controlled at 50～80 ℃.
5. the method for preparing anode material of lithium-ion battery of a kind of coated Si according to claim 1, is characterized in that, after described drying and dehydrating is complete, and the mangaic acid anode material for lithium-ion batteries moisture of described coated silica＜0.1%.
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|---|---|---|---|
| CN2013100431807A CN103172120A (en) | 2013-02-04 | 2013-02-04 | Preparation method of silicon-coated lithium ion battery anode material |
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|---|---|---|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105226250A (en) * | 2015-09-15 | 2016-01-06 | 施雨华 | Coated with silica combination electrode material and preparation method thereof |
| CN106076244A (en) * | 2016-06-12 | 2016-11-09 | 上海空间电源研究所 | A kind of preparation method of the long-life lithium ion sieve adsorbant of nano-oxide cladding |
| CN109095491A (en) * | 2018-08-29 | 2018-12-28 | 交城县金兰化工有限公司 | A kind of microwave dehydration method of the inorganic salts containing the crystallization water |
| CN109193041A (en) * | 2018-09-28 | 2019-01-11 | 山东天瀚新能源科技有限公司 | A kind of lithium ion battery that high temperature cyclic performance is excellent |
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| CN1445311A (en) * | 2002-03-20 | 2003-10-01 | 新加坡纳米材料科技有限公司 | calcium carbonate/silicon dioxide-water(1/n) nano-compound particle and hollow silicon dioxide-water(1/n) nano-material and its preparation method |
| CN1569746A (en) * | 2004-04-29 | 2005-01-26 | 上海交通大学 | Method for preparing inorganic crystal whisker with SiO2-coated surface |
| CN102412395A (en) * | 2010-12-24 | 2012-04-11 | 无锡力泰能源科技股份有限公司 | Modified spinel lithium manganate for secondary lithium ion battery and preparation method thereof |
-
2013
- 2013-02-04 CN CN2013100431807A patent/CN103172120A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1445311A (en) * | 2002-03-20 | 2003-10-01 | 新加坡纳米材料科技有限公司 | calcium carbonate/silicon dioxide-water(1/n) nano-compound particle and hollow silicon dioxide-water(1/n) nano-material and its preparation method |
| CN1569746A (en) * | 2004-04-29 | 2005-01-26 | 上海交通大学 | Method for preparing inorganic crystal whisker with SiO2-coated surface |
| CN102412395A (en) * | 2010-12-24 | 2012-04-11 | 无锡力泰能源科技股份有限公司 | Modified spinel lithium manganate for secondary lithium ion battery and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105226250A (en) * | 2015-09-15 | 2016-01-06 | 施雨华 | Coated with silica combination electrode material and preparation method thereof |
| CN106076244A (en) * | 2016-06-12 | 2016-11-09 | 上海空间电源研究所 | A kind of preparation method of the long-life lithium ion sieve adsorbant of nano-oxide cladding |
| CN109095491A (en) * | 2018-08-29 | 2018-12-28 | 交城县金兰化工有限公司 | A kind of microwave dehydration method of the inorganic salts containing the crystallization water |
| CN109193041A (en) * | 2018-09-28 | 2019-01-11 | 山东天瀚新能源科技有限公司 | A kind of lithium ion battery that high temperature cyclic performance is excellent |
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Application publication date: 20130626 |