CN102130363A - High magnification polymer lithium ion power battery and preparation method thereof - Google Patents
High magnification polymer lithium ion power battery and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a high magnification polymer lithium ion power battery and a preparation method thereof, and belongs to the field of lithium ion power batteries. Compared with the conventional batteries (1-10C), the discharge current of the battery is greatly promoted; and the magnification discharge can reach 20 to 25C. Aluminum phosphate (AlPO4) is coated on the surface of a high-voltage lithium ion anode material (LiNi0.5Mn1.5O4) in the anode; the anode mixture contains 78 to 92 percent of active substance, 4 to 11 percent of conductive agent and 4 to 11 percent of adhesive in percentage by weight; and the cathode contains 78 to 92 percent of surface cracked carbon coated lithium titanate, 4 to 11 percent of conductive agent and 4 to 11 percent of adhesive. The battery 2C, 8C and 25C discharge specific capacities of the lithium ion battery are 130mAh/g, 120mAh/g and 83.5mAh/g. The power battery can be used for various high-capacity high magnification discharge equipment such as electric vehicles, unmanned machines, power sources for submarines and the like.
Description
Technical field
The present invention relates to lithium ion battery, being specifically related to negative material is the modified lithium titanate material, and positive electrode adopts the surface to coat AlPO
45V positive electrode LiNi
0.5Mn
1.5O
4
Background technology
Developing rapidly of auto industry promoted progress of industry and development such as global machinery, the energy, traffic, but fuel-engined vehicle is when promoting the well-being of mankind, and exhaust emissions has also caused severe contamination to the human residential environment.According to statistics, at present 63% of the air pollution composition from fuel-engined vehicle, the degree that has arrived in addition strict control and administered.By on January 1st, 1994, global verified oil reserves was 9999.1 hundred million barrels (being roughly equal to 1428.4 hundred million tons), if by 6680 barrels of calculating of 1993 annual days consumption, (promptly by 2043) will use up global oil in 46 years so.Environmental protection and energy starved require to have driven the development of electric automobile (EV) and electrokinetic cell.Each developed country of the world such as the U.S., Japan, Germany, France etc. have actively carried out the research and development efforts of EV, in the hope of solving environment and noise pollution and problem of energy crisis as early as possible.According to statistics, existing nearly 200 companies of China, enterprise are engaged in exploitation, production and the application of small-sized electric car.Country electric motor car as high-tech project, listed in " 863 " plan, preferentially help.
Lithium ion battery because of its energy density height, have extended cycle life, advantage such as security performance is good, pollution-free, be widely used in mobile phone, the notebook computer lamp portable set, can have estimated also can be applied in the near future in hybrid electric vehicle (HEV) and the electric automobile main equipments such as (EV).This will propose higher requirement to high-capacity lithium ion cell.
The negative material of lithium ion battery adopts various embedding lithium material with carbon elements mostly at present.But the current potential of the current potential of carbon electrode and lithium metal is very approaching, and when battery overcharge, the easy precipitating metal lithium of carbon electrodes can form Li dendrite and causes short circuit; Easily cause safety problems such as thermal runaway when temperature is too high.Simultaneously, lithium ion can make the material with carbon element structure be damaged inserting repeatedly and taking off in the embedding process, thereby causes the decay of capacity.Spinelle Li
4Ti
5O
12The lithium ion diffusion coefficient is 2 * 10
-8Cm
2/ S exceeds an order of magnitude than graphite.During high power charging-discharging, lithium ion is difficult for separating out at material surface.Skeleton structure remains unchanged in charge and discharge process, is that a kind of " zero strain " inserts material, does not have bulk effect, is a kind of desirable ion cathode material lithium.
Pure lithium titanate electronic conductivity is very low, only is 10
-9S/cm is unfavorable for the battery high-multiplying power discharge, safety problem such as easily blast under the situation of over-charging of battery.The electrode potential of lithium titanate is 1.55V (vs.Li/Li simultaneously
+), with conventional positive electrode (as LiCoO
2, LiMn
2O
4, LiFePO
4) the voltage of battery after the pairing is lower.
Summary of the invention
In order to address the above problem, but the object of the present invention is to provide a kind of high power charging-discharging, the polymer lithium ion power cell that security performance is good.
The objective of the invention is to realize by following scheme:
High ratio polyalcohol lithium ion power cell comprises positive electrode, negative material and electrolyte; It is characterized in that: the consisting of of positive electrode: the surface coats the LiNi of aluminum phosphate
0.5Mn
1.5O
4Material, conductive agent and adhesive Kynoar; Consisting of of negative material: the surface coats modified lithium titanate, conductive agent, the adhesive Kynoar of cracking carbon; The solute of electrolyte is at least a in two borate lithiums, the hexafluoro phosphorus lithium.
The mass ratio of described positive electrode is: 78～92% LiNi
0.5Mn
1.5O
4Material (not containing surface coated aluminum phosphate), 4～11% conductive agent and 4～11% adhesive Kynoar.
Described surface coated AlPO
4With positive electrode active materials LiNi
0.5Mn
1.5O
4Mass percent is 1～8%: 92～99%.
The mass ratio of described negative material is: 78～92% lithium titanate (not containing surface coated cracking carbon), 4～11% conductive agent and 4～11% adhesive Kynoar.
Conductive agent is carbon nano-tube, super conductive black, carbon black, Nano Silver, comprises wherein a kind of at least.
A kind of preparation method of high multiplying power lithium ion polymer power battery is characterized in that:
Positive plate is made and is comprised: the surface is coated AlPO
4LiNi
0.5Mn
1.5O
4Vacuumize stirring in material, conductive agent and the adhesive adding agitator tank, add the N-methyl pyrrolidone and continue to stir, obtain anode sizing agent; Anode sizing agent is coated on aluminium foil, and drying, roll-in make positive plate;
Negative plate is made and to be comprised: lithium titanate material, conductive agent and adhesive that the surface is coated cracking carbon add in the agitator tank and vacuumize stirring, add the N-methyl pyrrolidone and continue to stir, and obtain cathode size; Cathode size is coated on the Copper Foil, and drying, roll-in make negative plate;
With lug welding, rubberizing, positive/negative plate is made into electric core with barrier film, electric core refills shell, welding, filling electrolyte, seals, changes into, partial volume, get final product the finished product battery.
The present invention is according to the problem that may occur in the electrokinetic cell use: high-multiplying power discharge requirement, fail safe, anodal and electrolyte react in cyclic process and cause attenuation problem, to material property and battery preparation technique are improved.Technical advance and novelty mainly show:
(1) causes attenuation problem, the AlPO that surperficial clad structure is stable at anodal in cyclic process, reacting with electrolyte
4Thereby, improved heavy-current discharge performance, cycle performance and the security performance of battery;
(2) use graphite to cause the problem of high-rate battery discharge difference at general lithium ion battery negative, adopt the surface to be coated with high conductive materials lithium titanate is carried out modification, improved the high-rate battery discharge performance;
(3) adopt the high-tension positive electrode of 5V, improve the voltage and the output specific energy of battery;
(4) electric conducting materials such as the carbon nano-tube of adding electric conductivity excellence or Nano Silver in the positive electrode, the large current discharging capability of raising battery.
Description of drawings
Fig. 1. the 2C discharge curve of high ratio polyalcohol lithium ion power cell embodiment 1 of the present invention
Fig. 2. the 8C discharge curve of high ratio polyalcohol lithium ion power cell embodiment 1 of the present invention
Fig. 3. the 25C discharge curve of high ratio polyalcohol lithium ion power cell embodiment 1 of the present invention
Fig. 4. the 8C discharge cycles performance map of high ratio polyalcohol lithium ion power cell embodiment 1 of the present invention
Embodiment
High ratio polyalcohol lithium ion power cell of the present invention has improved the multiplying power discharging property and the security performance of battery, can be applicable to electric automobile, electric bicycle, electronic toy, model airplane, notebook computer etc.High ratio polyalcohol lithium ion power cell of the present invention uses good cycle, usage safety performance good, is specially adapted to the electrokinetic cell field.
Below in conjunction with specific embodiment to the detailed description of the invention.
Embodiment 1
Anodal preparation: the surface with 92% coats AlPO
4LiNi
0.5Mn
1.5O
4, 3% conductive black, 1% Nano Silver rod and 4% Kynoar (PVDF) mix pulping in N-methyl pyrrolidone (NMP), evenly be coated on the aluminium collector, dries compactings for last 105 ℃, is cut into the 240*160mm size, obtains positive pole.
The negative pole preparation: the surface with 92% coats the lithium titanate of cracking carbon (available from Shenzhen Bei Terui new energy materials Co., Ltd, carbon wherein: lithium titanate=3: 97,92～99), 4% conductive black and 4% Kynoar (PVDF) mix pulping in N-methyl pyrrolidone (NMP) but be not limited to carbon: the ratio of lithium titanate=3: 97 can be carbon: lithium titanate=1～8:, evenly be coated on the Copper Foil, last 105 ℃ of oven dry compactings, be cut into the 242*163mm size, obtain negative pole.
Be coated with the preparation of polymer substrate barrier film: with mean molecule quantity is that 500000 hexafluoropropylene accounts for Kynoar and hexafluoropropylene (PVDF-HFP) copolymer mixes pulping in acetone, evenly be coated in thick 2 μ m, 68 ℃ of oven dry afterwards, be cut into the 245*168mm size, obtain being coated with the barrier film of polymer substrate.Wherein, to account for the degree of the weight of Kynoar and hexafluoropropylene copolymer be 5% to hexafluoropropylene.
Nonaqueous electrolytic solution preparation: ethylene carbonate (EC), dimethyl carbonate (DMC), diethyl carbonate (DEC) are respectively the solvent that 30%, 35%, 35% mixed is evenly made nonaqueous electrolytic solution according to percent by volume, are that 1mol/L dissolves in hexafluoro phosphorus lithium (LiPF according to the molar concentration in the nonaqueous electrolytic solution
6) salt, be 1% adding vinylene carbonate (VC) film for additive according to accounting for solution quality percentage, obtain nonaqueous electrolytic solution.
The barrier film lamination of the positive pole, negative pole and the coating organic polymer matrix that prepare is become battery, be encapsulated in the plastic-aluminum packaging film, remove redundant moisture after 8 hours, inject the above-mentioned nonaqueous electrolytic solution for preparing, and carry out vacuum liquid-absorbing and seal through 80 ℃ of oven dry.After the battery of having annotated liquid leaves standstill 12 hours, electrolyte soaks into coating PVDF-HFP barrier film fully, and the baking oven of putting into 80 ℃ is incubated 2 hours, makes nonaqueous electrolytic solution be gel state in polymer substrate, through changing into processing, obtain the polymer lithium ion power cell of finished product.
Embodiment 2
Anodal preparation: the surface with 90% coats AlPO
4LiNi
0.5Mn
1.5O
4, 3% conductive black, 3% carbon nano-tube and 4% Kynoar (PVDF) mix pulping in N-methyl pyrrolidone (NMP), evenly be coated on the aluminium collector, last 105 ℃ of oven dry compactings are cut into the 240*160mm size, obtain positive pole.
The negative pole preparation: the surface with 90% coats the lithium titanate of cracking carbon (available from Shenzhen Bei Terui new energy materials Co., Ltd, carbon wherein: lithium titanate=3: 97,92～99), 6% conductive black and 4% Kynoar (PVDF) mix pulping in N-methyl pyrrolidone (NMP) but be not limited to carbon: the ratio of lithium titanate=3: 97 can be carbon: lithium titanate=1～8:, evenly be coated on the Copper Foil, last 105 ℃ of oven dry compactings, be cut into the 242*163mm size, obtain negative pole.
Be coated with the preparation of polymer substrate barrier film: with mean molecule quantity is that 500000 PVDF-HFP copolymer mixes pulping in acetone, evenly is coated in thick 2 μ m, and 68 ℃ of oven dry are cut into the 245*168mm size afterwards, obtain being coated with the barrier film of polymer substrate.Wherein, to account for the degree of the weight of copolymer from vinylidene fluoride and hexafluoropropylene be 5% to hexafluoropropylene.
Nonaqueous electrolytic solution preparation: ethylene carbonate (EC), dimethyl carbonate (DMC), diethyl carbonate (DEC) are respectively the solvent that 30%, 35%, 35% mixed is evenly made nonaqueous electrolytic solution according to percent by volume, are that 1mol/L dissolves in hexafluoro phosphorus lithium (LiPF according to the molar concentration in the nonaqueous electrolytic solution
6) salt, be 1% adding propylene sulfite (PS) film for additive according to accounting for solution quality percentage, obtain nonaqueous electrolytic solution.
The barrier film lamination of the positive pole, negative pole and the coating organic polymer matrix that prepare is become battery, be encapsulated in the plastic-aluminum packaging film, remove redundant moisture after 8 hours, inject the above-mentioned nonaqueous electrolytic solution for preparing, and carry out vacuum liquid-absorbing and seal through 80 ℃ of oven dry.After the battery of having annotated liquid leaves standstill 12 hours, electrolyte soaks into coating PVDF-HFP barrier film fully, and the baking oven of putting into 80 ℃ is incubated 2 hours, makes nonaqueous electrolytic solution be gel state in polymer substrate, through changing into processing, obtain the polymer lithium ion power cell of finished product.
Embodiment 3
Anodal preparation: the surface with 88% coats AlPO
4LiNi
0.5Mn
1.5O
4, 2% conductive black, 2% Nano Silver rod and 8% Kynoar (PVDF) mix pulping in N-methyl pyrrolidone (NMP), evenly be coated on the aluminium collector, dries compactings for last 105 ℃, is cut into the 240*160mm size, obtains positive pole.
The negative pole preparation: the surface with 88% coats the lithium titanate of cracking carbon (available from Shenzhen Bei Terui new energy materials Co., Ltd, carbon wherein: lithium titanate=3: 97,92～99), 2% conductive black and 10% Kynoar (PVDF) mix pulping in N-methyl pyrrolidone (NMP) but be not limited to carbon: the ratio of lithium titanate=3: 97 can be carbon: lithium titanate=1～8:, evenly be coated on the Copper Foil, last 105 ℃ of oven dry compactings, be cut into the 242*163mm size, obtain negative pole.
Be coated with the preparation of polymer substrate barrier film: with mean molecule quantity is that 500000 PVDF-HFP copolymer mixes pulping in acetone, evenly is coated in thick 2 μ m, and 68 ℃ of oven dry are cut into the 245*168mm size afterwards, obtain being coated with the barrier film of polymer substrate.Wherein, to account for the degree of the weight of copolymer from vinylidene fluoride and hexafluoropropylene be 5% to hexafluoropropylene.
Nonaqueous electrolytic solution preparation: ethylene carbonate (EC), dimethyl carbonate (DMC), diethyl carbonate (DEC) are respectively the solvent that 30%, 35%, 35% mixed is evenly made nonaqueous electrolytic solution according to percent by volume, are that 1mol/L dissolves in hexafluoro phosphorus lithium (LiPF according to the molar concentration in the nonaqueous electrolytic solution
6) salt, be 1% adding vinylene carbonate (VC) film for additive according to accounting for solution quality percentage, obtain nonaqueous electrolytic solution.
The barrier film lamination of the positive pole, negative pole and the coating organic polymer matrix that prepare is become battery, be encapsulated in the plastic-aluminum packaging film, remove redundant moisture after 8 hours, inject the above-mentioned nonaqueous electrolytic solution for preparing, and carry out vacuum liquid-absorbing and seal through 80 ℃ of oven dry.After the battery of having annotated liquid leaves standstill 12 hours, electrolyte soaks into coating PVDF-HFP barrier film fully, and the baking oven of putting into 80 ℃ is incubated 2 hours, makes nonaqueous electrolytic solution be gel state in polymer substrate, through changing into processing, obtain the polymer lithium ion power cell of finished product.
Embodiment 4
Anodal preparation: the surface with 78% coats AlPO
4LiNi
0.5Mn
1.5O
4, 10% conductive black, 1% carbon nano-tube and 11% Kynoar (PVDF) mix pulping in N-methyl pyrrolidone (NMP), evenly be coated on the aluminium collector, last 105 ℃ of oven dry compactings are cut into the 240*160mm size, obtain positive pole.
The negative pole preparation: the surface with 78% coats the lithium titanate of cracking carbon (available from Shenzhen Bei Terui new energy materials Co., Ltd, carbon wherein: lithium titanate=3: 97,92～99), 11% conductive black and 11% Kynoar (PVDF) mix pulping in N-methyl pyrrolidone (NMP) but be not limited to carbon: the ratio of lithium titanate=3: 97 can be carbon: lithium titanate=1～8:, evenly be coated on the Copper Foil, last 105 ℃ of oven dry compactings, be cut into the 242*163mm size, obtain negative pole.
Be coated with the preparation of polymer substrate barrier film: with mean molecule quantity is that 500000 PVDF-HFP copolymer mixes pulping in acetone, evenly is coated in thick 2 μ m, and 68 ℃ of oven dry are cut into the 245*168mm size afterwards, obtain being coated with the barrier film of polymer substrate.Wherein, to account for the degree of the weight of copolymer from vinylidene fluoride and hexafluoropropylene be 5% to hexafluoropropylene.
Nonaqueous electrolytic solution preparation: ethylene carbonate (EC), dimethyl carbonate (DMC), diethyl carbonate (DEC) are respectively the solvent that 30%, 35%, 35% mixed is evenly made nonaqueous electrolytic solution according to percent by volume, according to the molar concentration in the nonaqueous electrolytic solution is that 1mol/L dissolves in two borate lithium (LiBOB) salt, according to accounting for solution quality percentage is 1% adding propylene sulfite (PS) film for additive, obtains nonaqueous electrolytic solution.
The barrier film lamination of the positive pole, negative pole and the coating organic polymer matrix that prepare is become battery, be encapsulated in the plastic-aluminum packaging film, remove redundant moisture after 8 hours, inject the above-mentioned nonaqueous electrolytic solution for preparing, and carry out vacuum liquid-absorbing and seal through 80 ℃ of oven dry.After the battery of having annotated liquid leaves standstill 12 hours, electrolyte soaks into coating PVDF-HFP barrier film fully, and the baking oven of putting into 80 ℃ is incubated 2 hours, makes nonaqueous electrolytic solution be gel state in polymer substrate, through changing into processing, obtain the polymer lithium ion power cell of finished product.
Lithium-ion-power cell example 1 effect of high power charging-discharging provided by the invention is as follows:
1, battery 2C, 8C, 25C specific discharge capacity are 130mAh/g, 120mAh/g, 83.5mAh/g (seeing Fig. 1,2,3);
2, battery discharges and recharges with 8C, and the 300th all capacity remain on 90% above (see figure 4).
Chemical property the effect list of table 1. high ratio polyalcohol lithium ion power cell embodiment 1,2,3,4 of the present invention
Claims (6)
1. high ratio polyalcohol lithium ion power cell comprises positive electrode, negative material and electrolyte; It is characterized in that: the consisting of of positive electrode: the surface coats the LiNi of aluminum phosphate
0.5Mn
1.5O
4Material, conductive agent and adhesive Kynoar; Consisting of of negative material: the surface coats modified lithium titanate, conductive agent, the adhesive Kynoar of cracking carbon; The solute of electrolyte is at least a in two borate lithiums, the hexafluoro phosphorus lithium.
2. high ratio polyalcohol lithium ion power cell according to claim 1 is characterized in that: the mass ratio of described positive electrode is: 78～92% LiNi
0.5Mn
1.5O
4Material, 4～11% conductive agent and 4～11% adhesive Kynoar.
3. high ratio polyalcohol lithium ion power cell according to claim 1 is characterized in that: described surface coated AlPO
4With positive electrode active materials LiNi
0.5Mn
1.5O
4Mass percent is 1～8%:92～99%.
4. high ratio polyalcohol lithium ion power cell according to claim 1 is characterized in that: the mass ratio of described negative material is: 78～92% lithium titanate, 4～11% conductive agent and 4～11% adhesive Kynoar.
5. high ratio polyalcohol lithium ion power cell according to claim 1 is characterized in that: conductive agent is carbon nano-tube, super conductive black, carbon black, Nano Silver, comprises wherein a kind of at least.
6. the preparation method of a kind of high multiplying power lithium ion polymer power battery according to claim 1 is characterized in that:
Positive plate is made and is comprised: the surface is coated AlPO
4LiNi
0.5Mn
1.5O
4Vacuumize stirring in material, conductive agent and the adhesive adding agitator tank, add the N-methyl pyrrolidone and continue to stir, obtain anode sizing agent; Anode sizing agent is coated on aluminium foil, and drying, roll-in make positive plate;
Negative plate is made and to be comprised: lithium titanate material, conductive agent and adhesive that the surface is coated cracking carbon add in the agitator tank and vacuumize stirring, add the N-methyl pyrrolidone and continue to stir, and obtain cathode size; Cathode size is coated on the Copper Foil, and drying, roll-in make negative plate;
With lug welding, rubberizing, positive/negative plate is made into electric core with barrier film, electric core refills shell, welding, filling electrolyte, seals, changes into, partial volume, get final product the finished product battery.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050676A (en) * | 2013-01-11 | 2013-04-17 | 山东同大新能源有限公司 | Lithium-ion power battery and quick charging electric automobile with same |
| CN103137960A (en) * | 2011-11-25 | 2013-06-05 | 清华大学 | Lithium ion battery positive electrode material and preparation method thereof, and lithium ion battery |
| CN103515610A (en) * | 2012-06-28 | 2014-01-15 | 深圳市海盈科技有限公司 | Lithium-ion electrode material and lithium-ion power battery |
| CN103682307A (en) * | 2013-11-27 | 2014-03-26 | 山东精工电子科技有限公司 | LiNi0.5Mn1.5O4/lithium titanate battery and preparation method thereof |
| CN103872306A (en) * | 2014-03-24 | 2014-06-18 | 四川剑兴锂电池有限公司 | Preparation method of lithium titanate negative electrode slurry |
| CN104137307A (en) * | 2012-04-16 | 2014-11-05 | 株式会社Lg化学 | Method for manufacturing electrode for lithium secondary battery and electrode manufactured by using same |
| CN104205469A (en) * | 2012-04-20 | 2014-12-10 | 株式会社Lg化学 | Electrolyte for secondary battery and lithium secondary battery including same |
| CN104393281A (en) * | 2014-12-03 | 2015-03-04 | 刘娜 | Preparation method of manganese, nickel and lithium cathode material |
| CN117773409A (en) * | 2023-12-20 | 2024-03-29 | 道尔化成电子材料(上海)有限公司 | Nano silver-based composite solder and preparation method thereof |
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| CN101000960A (en) * | 2006-12-29 | 2007-07-18 | 深圳市贝特瑞电子材料有限公司 | Composite lithium titanate electrode material and preparation method thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103137960A (en) * | 2011-11-25 | 2013-06-05 | 清华大学 | Lithium ion battery positive electrode material and preparation method thereof, and lithium ion battery |
| CN103137960B (en) * | 2011-11-25 | 2016-01-20 | 清华大学 | Anode material for lithium-ion batteries and preparation method thereof and lithium ion battery |
| CN104137307A (en) * | 2012-04-16 | 2014-11-05 | 株式会社Lg化学 | Method for manufacturing electrode for lithium secondary battery and electrode manufactured by using same |
| US10026952B2 (en) | 2012-04-16 | 2018-07-17 | Lg Chem, Ltd. | Method of manufacturing electrode for lithium secondary battery and electrode manufactured using the same |
| US9484598B2 (en) | 2012-04-20 | 2016-11-01 | Lg Chem, Ltd. | Electrolyte for secondary battery and lithium secondary battery including the same |
| CN104205469A (en) * | 2012-04-20 | 2014-12-10 | 株式会社Lg化学 | Electrolyte for secondary battery and lithium secondary battery including same |
| CN103515610A (en) * | 2012-06-28 | 2014-01-15 | 深圳市海盈科技有限公司 | Lithium-ion electrode material and lithium-ion power battery |
| CN103050676A (en) * | 2013-01-11 | 2013-04-17 | 山东同大新能源有限公司 | Lithium-ion power battery and quick charging electric automobile with same |
| CN103682307A (en) * | 2013-11-27 | 2014-03-26 | 山东精工电子科技有限公司 | LiNi0.5Mn1.5O4/lithium titanate battery and preparation method thereof |
| CN103682307B (en) * | 2013-11-27 | 2017-01-04 | 山东精工电子科技有限公司 | Nickel ion doped/lithium titanate battery and preparation method thereof |
| CN103872306A (en) * | 2014-03-24 | 2014-06-18 | 四川剑兴锂电池有限公司 | Preparation method of lithium titanate negative electrode slurry |
| CN104393281A (en) * | 2014-12-03 | 2015-03-04 | 刘娜 | Preparation method of manganese, nickel and lithium cathode material |
| CN104393281B (en) * | 2014-12-03 | 2017-01-25 | 梁贺君 | Preparation method of manganese, nickel and lithium cathode material |
| CN117773409A (en) * | 2023-12-20 | 2024-03-29 | 道尔化成电子材料(上海)有限公司 | Nano silver-based composite solder and preparation method thereof |
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Application publication date: 20110720 |