CN102544578A - Lithium ion battery capable of improving comprehensive performance - Google Patents
Lithium ion battery capable of improving comprehensive performance Download PDFInfo
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- CN102544578A CN102544578A CN2012100698160A CN201210069816A CN102544578A CN 102544578 A CN102544578 A CN 102544578A CN 2012100698160 A CN2012100698160 A CN 2012100698160A CN 201210069816 A CN201210069816 A CN 201210069816A CN 102544578 A CN102544578 A CN 102544578A
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Abstract
The invention discloses a lithium ion battery capable of improving the comprehensive performance. The lithium ion battery comprises a battery electric core, wherein the battery electric core comprises a cathode piece, an anode piece, an electrolyte and a diaphragm, wherein the cathode piece comprises a cathode current collector; a layer of cathode slurry is coated on the surface of the cathode current collector; the anode piece comprises an anode current collector; and anode slurry is coated on the surfaces of the upper side and the lower side of the anode current collector respectively. According to the lithium ion battery capable of improving the comprehensive performance, the whole performance, such as the safety performance and the environment performance, of the battery can be improved by flexibly coating organic system anode slurry and water solvent system anode slurry on the upper side and the lower side of the anode current collector of the electric core, so that the using safety of the battery is improved greatly, and the market application prospect of products of a battery production factory is improved; and the lithium ion battery has a significance for production practicability.
Description
Technical field
The present invention relates to the battery technology field, particularly relate to a kind of lithium ion battery that can improve combination property.
Background technology
In the last few years, along with the fast development of portable electric appts, power supply was had higher requirement.Advantages such as lithium rechargeable battery has the voltage height, specific capacity is big, self discharge is little, in light weight, memoryless property enjoy favor; Not only on portable electric appts, be used widely, and be widely used in big-and-middle-sized electrical equipment aspects such as electric automobile, electric bicycle and electric tool like mobile phone, DV and laptop computer.
At present, lithium rechargeable battery generally comprises electric core, integrated circuit board and battery external packing, and battery battery core is made up of positive pole, negative pole, electrolyte, barrier film and battery cap.Wherein, positive pole generally is made up of transition metal oxide, conductive agent, binding agent; Negative pole generally is made up of two kinds of systems: a kind of is carbon, conductive agent, organic system binding agent, and another kind is carbon, conductive agent, aqueous solvent system binding agent; Barrier film is made up of polypropylene PP, polythene PE; Electrolyte is made up of electrolyte and organic solvent.
For battery battery core, from the angle of negative pole, the organic system negative pole has good, low temperature resistant good, the characteristics such as resistance is little of caking property, and cost is high, the organic solvent contaminated environment but the inferior position that exists has; The aqueous solvent negative pole has characteristics such as capacity height, cost is low, thermal discharge is few, but caking property is relatively poor, resistance is big.
Therefore, the overall performance that how further to improve battery just becomes the problem of current solution.
Summary of the invention
In view of this; The purpose of this invention is to provide a kind of lithium ion battery that can improve combination property, it can use organic system cathode size and aqueous solvent system cathode size respectively through being coated with respectively in the both sides up and down of electric core negative plate collector neatly, thereby helps improving the overall performance of battery; Like security performance and environmental performance; Improve the safety in utilization of battery greatly, and then improve the market application foreground of battery production producer product, be of great practical significance.
For this reason, the invention provides a kind of lithium ion battery that can improve combination property, include battery battery core, said battery battery core includes positive plate, negative plate, electrolyte and barrier film;
Said positive plate includes a plus plate current-collecting body, and said plus plate current-collecting body surfaces coated is furnished with one deck anode sizing agent;
Said negative plate includes a negative current collector, and said negative current collector both side surface up and down is coated with cathode size respectively.
Wherein, said electrolyte includes electrolytic salt and organic solvent, and wherein, said electrolytic salt includes lithium hexafluoro phosphate LiPF
6And/or lithium perchlorate LiClO
4Said organic solvent includes at least a among dimethyl carbonate DMC, diethyl carbonate DEC, methyl ethyl carbonate EMC, ethylene carbonate EC and the vinylene carbonate VC.
Wherein, said plus plate current-collecting body is an aluminium foil, and said anode sizing agent includes positive active material, carbon-based material conductive agent, binding agent and solvent, and wherein, said positive active material includes cobalt acid lithium LiCoO
2, ternary compound oxides nickle cobalt lithium manganate LiNi
1/3Co
1/3Mn
1/3O
2With LiMn2O4 LiMn
2O
4At least a, said conductive agent includes at least a in carbon black, CNT, acetylene black, electrically conductive graphite and the Graphene, said binding agent is Kynoar PVDF, said solvent is N, the N dimethyl is than pyrrolidone NMP.
Wherein, said positive active material is cobalt acid lithium LiCoO
2, said cobalt acid lithium LiCoO
2, the weight ratio between conductive agent and the Kynoar PVDF is 94:3:3.
Wherein, said cathode size includes negative electrode active material, conductive agent, binding agent and solvent, and wherein, said negative electrode active material comprises at least a in native graphite, Delanium and the carbonaceous mesophase spherules; Said conductive agent includes at least a in carbon black, CNT, acetylene black, electrically conductive graphite and the Graphene; Said binding agent is Kynoar PVDF or styrene butadiene rubber sbr; Said solvent is N, and the N dimethyl is than pyrrolidone NMP or water.
Wherein, the top of said negative current collector is formed with long face 11, and the bottom of said negative current collector is formed with short face 12, and said long facial 11 length is greater than the length of weak point facial 12;
The long face 11 of said negative current collector is coated with one deck organic system cathode size or aqueous solvent system cathode size respectively with short facial 12 surfaces, and the cathode size of coating is inequality on said long facial 11 and short facial 12.
Wherein, facial 11 surfaces coated of the length of said negative current collector 1 are furnished with one deck organic system cathode size, and facial 12 surfaces coated of the weak point of said negative current collector 1 are furnished with one deck aqueous solvent system cathode size.
Wherein, The negative electrode active material that said organic system cathode size comprises is a Delanium; The binding agent that said organic system cathode size comprises is Kynoar PVDF; The solvent that said organic system cathode size comprises is N, and the N dimethyl is than pyrrolidone NMP, and the weight ratio between said Delanium, conductive agent and the Kynoar PVDF is 94:3:3.
Wherein, it is characterized in that the negative electrode active material that said aqueous solvent system cathode size comprises is a native graphite, the binding agent that said aqueous solvent system cathode size comprises is a styrene butadiene rubber sbr, and the solvent that said aqueous solvent system cathode size comprises is a water;
Also include sanlose CMC in the said aqueous solvent system cathode size;
Weight ratio between said native graphite, conductive agent, sanlose CMC and the styrene butadiene rubber sbr is: 94:3:1:2.
Visible by above technical scheme provided by the invention; Compared with prior art; The invention provides a kind of lithium ion battery that can improve combination property, it can be cathode size and aqueous solvent system cathode size through being coated with epiorganism respectively in the both sides up and down of electric core negative plate collector neatly, thereby helps improving the overall performance of battery; Like security performance and environmental performance; Improve the safety in utilization of battery greatly, and then improve the market application foreground of battery production producer product, be of great practical significance.
Description of drawings
Fig. 1 is the structural representation sketch of negative plate in a kind of lithium ion battery that can improve combination property provided by the invention;
Fig. 2 is each item performance comparison form sketch map of four kinds of lithium ion batteries of utilization made of the present invention in four embodiment;
Fig. 3 is respectively that 5V, charging current are the mode of 1A when overcharging with the charging voltage for four kinds of lithium ion batteries of utilization made of the present invention in four embodiment, the indicatrix sketch map of battery charge and cell voltage;
Fig. 4 is that four kinds of lithium ion batteries of utilization made of the present invention in four embodiment arrive 4.2V with the current charges of 1C respectively; The constant voltage charge current cut-off is to 0.05C then; The hot case of putting into 150 degree again is when carrying out the nature discharge test, the indicatrix sketch map of ambient temperature and cell voltage;
Fig. 5 is that four kinds of lithium ion batteries of utilization made of the present invention in four embodiment arrive 4.2V with the current charges of 1C rate of charge respectively; The draw point that uses 3 millimeters thicknesses then pierces through battery when carrying out lancing test, the indicatrix sketch map of the temperature of battery and voltage.
Embodiment
In order to make those skilled in the art person understand the present invention program better, the present invention is done further detailed description below in conjunction with accompanying drawing and execution mode.
The invention provides a kind of lithium ion battery that can improve combination property, include battery battery core, said battery battery core is made up of positive plate, negative plate, barrier film and battery case.
In the present invention; The battery battery core of said lithium ion battery includes positive plate, negative plate, electrolyte, barrier film, electrolyte and battery case; Specifically process electric core through coiling by positive plate, negative plate and barrier film; Be injected with electrolyte in the said battery battery core, this battery battery core covers through going into shell, the weldering end, slot rolling, fluid injection, weldering, seals, thermal shrinkable sleeve, a plurality of technologies such as soak into, change into, and processes the lithium ion battery of finished product at last.
In the present invention, the electrolyte that injects in the electric core of said lithium ion battery includes electrolytic salt and organic solvent, and wherein, said electrolytic salt can be for including lithium hexafluoro phosphate (LiPF
6) and/or lithium perchlorate (LiClO
4); Said organic solvent can include at least a in dimethyl carbonate (DMC), diethyl carbonate (DEC), methyl ethyl carbonate (EMC), ethylene carbonate (EC) and the vinylene carbonate (VC).
In the present invention, said positive plate includes a plus plate current-collecting body, and said plus plate current-collecting body surfaces coated is furnished with one deck anode sizing agent;
On concrete the realization, said plus plate current-collecting body can be aluminium foil, and said anode sizing agent includes positive active material (major ingredient), carbon-based material conductive agent, binding agent and solvent.
Wherein, said positive active material (major ingredient) includes at least a phosphate metal lithium compound, for example can for: include cobalt acid lithium LiCoO
2, ternary compound oxides nickle cobalt lithium manganate LiNi
1/3Co
1/3Mn
1/3O
2With LiMn2O4 LiMn
2O
4At least a; Said conductive agent (SP) can include at least a in carbon black, CNT, acetylene black, electrically conductive graphite and the Graphene; The binding agent of said positive active material of being used to bond can be Kynoar (PVDF); Said solvent can be N, and the N dimethyl is than pyrrolidone (NMP).
On concrete the realization, said positive active material is cobalt acid lithium LiCoO
2, said binding agent is Kynoar (PVDF), at this time, and said cobalt acid lithium LiCoO
2, the weight ratio between conductive agent (SP) and the Kynoar (PVDF) is 94:3:3.
In the present invention, said negative plate includes a negative current collector, and said negative current collector both side surface up and down is coated with cathode size respectively;
On concrete the realization, said negative current collector can perhaps contain the conducting polymer of lithium for Copper Foil, metal lithium sheet, aluminum alloy sheet, and said cathode size includes negative electrode active material (being major ingredient), conductive agent, binding agent and solvent.
Wherein, said negative electrode active material (being major ingredient) can be for comprising at least a in native graphite, Delanium and the carbonaceous mesophase spherules; Said conductive agent can include at least a in carbon black, CNT, acetylene black, electrically conductive graphite and the Graphene; The binding agent of said negative electrode active material of being used to bond can be Kynoar (PVDF) or styrene butadiene rubber sbr; Said solvent can be N, and the N dimethyl is a water perhaps than pyrrolidone (NMP).
In the present invention, on concrete the realization, referring to Fig. 1; Said negative plate includes negative current collector 1; The top of said negative current collector 1 is formed with long face 11, and the bottom of said negative current collector 1 is formed with short face 12, and said long facial 11 length is greater than the length of weak point facial 12.
In the present invention; The long face 11 of said negative current collector 1 only is coated with one deck organic system cathode size or aqueous solvent system cathode size (being one deck negative electrode active material) respectively with short facial 12 surfaces, and the cathode size of coating is inequality on said long facial 11 and short facial 12.
On concrete the realization, the present invention is preferably: facial 11 surfaces coated of the length of said negative current collector 1 are furnished with one deck organic system cathode size, and facial 12 surfaces coated of the weak point of said negative current collector 1 are furnished with one deck aqueous solvent system cathode size.
Need to prove that cathode size of the present invention comprises two kinds of organic system cathode size and aqueous solvent system cathode sizes.
Wherein, The negative electrode active material that said organic system cathode size comprises is a Delanium; The binding agent that said organic system cathode size comprises is Kynoar (PVDF); The solvent that said organic system cathode size comprises is N, and the N dimethyl is than pyrrolidone (NMP), and said conductive agent can include at least a in carbon black, CNT, acetylene black, electrically conductive graphite and the Graphene.
On concrete the realization, for said organic system cathode size, the weight ratio between said Delanium, conductive agent (SP) and the Kynoar (PVDF) is 94:3:3.
Wherein, The negative electrode active material that said aqueous solvent system cathode size comprises is a native graphite; The binding agent that said aqueous solvent system cathode size comprises is a styrene butadiene rubber sbr; The solvent that said aqueous solvent system cathode size comprises is a water, and said conductive agent can include at least a in carbon black, CNT, acetylene black, electrically conductive graphite and the Graphene; In addition, also include sanlose (CMC) in the said aqueous solvent system cathode size, this CMC uses as thickener.
On concrete the realization, for said aqueous solvent system cathode size, the weight ratio between said native graphite, conductive agent (SP), sanlose (CMC) and the styrene butadiene rubber sbr is: 94:3:1:2.
For the present invention, need to prove said lithium hexafluoro phosphate LiPF
6Be solute, provide dissociated ion as the medium of lithium ion migration with charge transfer.Said dimethyl carbonate (DMC), diethyl carbonate (DEC), methyl ethyl carbonate (EMC), ethylene carbonate (EC) and vinylene carbonate (VC) can not only dissolved solid solute lithium hexafluoro phosphate LiPF as electrolyte solvent
6, and can form stable electrochemical system after the blend, in various environment, guarantee the electrochemical stability of electrolyte system.
For a kind of lithium ion battery that can improve combination property provided by the invention; It not only can effectively guarantee the fail safe of battery; The combination property of battery can also be provided simultaneously, can well satisfy the consumer battery high security and high performance user demand.The present invention goes in all lithium ion batteries and the lithium battery system.For example, go in the lithium rechargeable battery of various ways such as square lithium ion battery, cylindrical lithium ion battery, polymer Li-ion battery.
Based on a kind of each component that can improve the lithium ion battery of combination property that the invention described above provides, the concrete performance and the effect of lithium ion battery of the present invention is described through four specific embodiments below.
Embodiment 1
1, the manufacturing process of positive plate: the user uses solvent N, and the N dimethyl dissolves Kynoar (PVDF) than pyrrolidone (NMP), then with LiCoO
2Be distributed in the middle of this solvent with conductive agent SP, its part by weight is LiCoO
2︰ SP ︰ PVDF=94 ︰ 3 ︰ 3; Mixing and stirring obtains having mobile anode sizing agent, then this slurry is applied to uniformly on plus plate current-collecting body (like aluminium foil); As shown in Figure 1; Dry then, make anode sizing agent on the anode collection surface, form one deck positive electrode active material layer fully, finally prepare positive plate.
2, the manufacturing process of organic system cathode size: the user uses solvent N; The N dimethyl dissolves Kynoar (PVDF) than pyrrolidone (NMP); Then Delanium and conductive agent SP are distributed in the middle of this solvent; Its part by weight is Delanium ︰ SP ︰ PVDF=94 ︰ 3 ︰ 3, and mixing and stirring obtains having mobile organic system cathode size then.
3, the manufacturing process of aqueous solvent system cathode size: the user adds native graphite, conductive agent SP, sanlose CMC, butylbenzene rubber SBR in aqueous solvent; Part by weight between them is the right Shi Mo of Tian ︰ SP ︰ CMC ︰ SBR=94 ︰ 3 ︰ 1 ︰ 2; Mixing and stirring obtains having mobile aqueous solvent system cathode size then.
4, the preparation process of anode plate for lithium ionic cell: the organic system cathode size that above-prepared is obtained is applied to the long face 11 at negative current collector (like Copper Foil) top uniformly; And aqueous solvent system cathode size is applied to the short face 12 in negative current collector (like Copper Foil) bottom; As shown in Figure 1; Dry then; Make organic system cathode size and aqueous solvent system cathode size form one deck negative electrode active material layer respectively in the end face and the bottom surface of negative current collector fully, finally prepare the negative plate of lithium ion battery of the present invention.
At last with a square lithium ion battery electricity of the polyethylene membrane coil coiled of the above-mentioned positive plate for preparing, negative plate and 15um thickness core, then electric core is packed in the middle of the battery case, and with LiPF
6Be dissolved in the mixing material of being made up of EC, DMC and DEC, form electrolyte, wherein the weight ratio between EC, DMC and the DEC is EC ︰ DMC ︰ DEC=1 ︰ 1 ︰ 1, and is injected into electrolyte in the battery case, is made into the square lithium ion battery of finished product at last.
The embodiment 1 that uses is basic identical with the method for embodiment 1, but the top of negative current collector (Copper Foil) long facial 11 with short facial 12 coatings of bottom be the organic system cathode size.
Embodiment 3
The embodiment 3 that uses is basic identical with the method for embodiment 1, but the aqueous solvent system that the is cathode size of short facial 12 coatings of long facial 11 and the bottom at the top of negative current collector (Copper Foil).
Embodiment 4
The embodiment 4 that uses is basic identical with the method for embodiment 1, but long face 11 coatings at the top of negative current collector (Copper Foil) is the aqueous solvent cathode size, and what short facial 12 of negative current collector (Copper Foil) bottom was coated with is the organic system cathode size.
In the present invention; For being well understood to the performance of lithium ion battery provided by the invention; Will be to the performance of battery; Through carrying out following five kinds of performance tests, the high-temperature storage performance of each embodiment lithium ion battery of comparative analysis, over-charging of battery electrical property, the hot case performance of battery, battery drop performance and battery acupuncture performance.Below the concrete test.
1, high-temperature storage performance (85 ℃/5 hours).With four kinds of lithium ion batteries of above-mentioned making with the current charges of 1C to 4.2V, the constant voltage charge current cut-off is to 0.05C then.Lithium ion battery is put into respectively in the middle of 85 ℃ of baking ovens,, put it into room temperature then through storage in 5 hours.Test its thickness and remaining battery capacity, see Fig. 2.
2, over-charging of battery electrical property.With four kinds of lithium ion batteries of above-mentioned making with the current charges of 1C to 4.2V, the constant voltage charge current cut-off is to 0.05C then.Lithium ion battery is overcharged with the 1A/5V mode respectively, if lithium ion battery do not smolder, missing of ignition, do not explode, then through this test.The result sees Fig. 2 and Fig. 3.
3, the hot case performance of battery.With four kinds of lithium ion batteries of above-mentioned making with the current charges of 1C to 4.2V, the constant voltage charge current cut-off is to 0.05C then.Battery is put into 150 ℃ of hot casees respectively tests, lost efficacy until lithium ion battery, if lithium ion battery do not smolder, missing of ignition, do not explode, then through this test.The result sees Fig. 2 and Fig. 4.
4, battery drop performance.With four kinds of lithium ion batteries of above-mentioned making with the current charges of 1C to 4.2V, the constant voltage charge current cut-off is to 0.05C then.The height of lithium ion battery from 1.5m fallen with the freely falling body mode, and test battery voltage, lithium ion battery receive not heating and drop number, and the result sees Fig. 2.
5, battery acupuncture performance.With four kinds of lithium ion batteries of above-mentioned making with the current charges of 1C to 4.2V, the constant voltage charge current cut-off is to 0.05C then.Use the draw point of 3mm that lithium ion battery is pierced through and carry out lancing test, if lithium ion battery do not smolder, missing of ignition, do not explode, then through this test.The result sees Fig. 2 and Fig. 5.
Therefore; In sum, the comparative analysis from embodiment 1 to 4 shows lithium ion battery provided by the invention; Through being coated with epiorganism respectively in the both sides up and down of electric core negative plate collector neatly is cathode size and aqueous solvent system cathode size, can obviously promote the overall performance of battery.
In sum; Compared with prior art; A kind of lithium ion battery that can improve combination property provided by the invention, it can be cathode size and aqueous solvent system cathode size through being coated with epiorganism respectively in the both sides up and down of electric core negative plate collector neatly, thereby helps improving the overall performance of battery; Like security performance and environmental performance; Improve the safety in utilization of battery greatly, and then improve the market application foreground of battery production producer product, be of great practical significance.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (9)
1. the lithium ion battery that can improve combination property is characterized in that, includes battery battery core, and said battery battery core includes positive plate, negative plate, electrolyte and barrier film;
Said positive plate includes a plus plate current-collecting body, and said plus plate current-collecting body surfaces coated is furnished with one deck anode sizing agent;
Said negative plate includes a negative current collector, and said negative current collector both side surface up and down is coated with cathode size respectively.
2. lithium ion battery as claimed in claim 1 is characterized in that said electrolyte includes electrolytic salt and organic solvent, and wherein, said electrolytic salt includes lithium hexafluoro phosphate LiPF
6And/or lithium perchlorate LiClO
4Said organic solvent includes at least a among dimethyl carbonate DMC, diethyl carbonate DEC, methyl ethyl carbonate EMC, ethylene carbonate EC and the vinylene carbonate VC.
3. lithium ion battery as claimed in claim 1; It is characterized in that said plus plate current-collecting body is an aluminium foil, said anode sizing agent includes positive active material, carbon-based material conductive agent, binding agent and solvent; Wherein, said positive active material includes cobalt acid lithium LiCoO
2, ternary compound oxides nickle cobalt lithium manganate LiNi
1/3Co
1/3Mn
1/3O
2With LiMn2O4 LiMn
2O
4At least a, said conductive agent includes at least a in carbon black, CNT, acetylene black, electrically conductive graphite and the Graphene, said binding agent is Kynoar PVDF, said solvent is N, the N dimethyl is than pyrrolidone NMP.
4. lithium ion battery as claimed in claim 3 is characterized in that, said positive active material is cobalt acid lithium LiCoO
2, said cobalt acid lithium LiCoO
2, the weight ratio between conductive agent and the Kynoar PVDF is 94:3:3.
5. lithium ion battery as claimed in claim 1; It is characterized in that; Said cathode size includes negative electrode active material, conductive agent, binding agent and solvent, and wherein, said negative electrode active material comprises at least a in native graphite, Delanium and the carbonaceous mesophase spherules; Said conductive agent includes at least a in carbon black, CNT, acetylene black, electrically conductive graphite and the Graphene; Said binding agent is Kynoar PVDF or styrene butadiene rubber sbr; Said solvent is N, and the N dimethyl is than pyrrolidone NMP or water.
6. lithium ion battery as claimed in claim 5; It is characterized in that; The top of said negative current collector is formed with long facial (11), and the bottom of said negative current collector is formed with short facial (12), and the length of said long facial (11) is greater than the length of short facial (12);
Long facial (11) of said negative current collector and short facial (12) surface are coated with one deck organic system cathode size or aqueous solvent system cathode size respectively, and the cathode size that coating is gone up in said long facial (11) and short facial (12) is inequality.
7. lithium ion battery as claimed in claim 6; It is characterized in that; Long facial (11) surfaces coated of said negative current collector (1) is furnished with one deck organic system cathode size, and short facial (12) surfaces coated of said negative current collector (1) is furnished with one deck aqueous solvent system cathode size.
8. like claim 6 or 7 described lithium ion batteries; It is characterized in that; The negative electrode active material that said organic system cathode size comprises is a Delanium, and the binding agent that said organic system cathode size comprises is Kynoar PVDF, and the solvent that said organic system cathode size comprises is N; The N dimethyl is than pyrrolidone NMP, and the weight ratio between said Delanium, conductive agent and the Kynoar PVDF is 94:3:3.
9. like claim 6 or 7 described lithium ion batteries; It is characterized in that; The negative electrode active material that said aqueous solvent system cathode size comprises is a native graphite; The binding agent that said aqueous solvent system cathode size comprises is a styrene butadiene rubber sbr, and the solvent that said aqueous solvent system cathode size comprises is a water;
Also include sanlose CMC in the said aqueous solvent system cathode size;
Weight ratio between said native graphite, conductive agent, sanlose CMC and the styrene butadiene rubber sbr is: 94:3:1:2.
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| CN114551796A (en) * | 2022-03-02 | 2022-05-27 | 蜂巢能源科技股份有限公司 | Negative plate, preparation method thereof and lithium battery |
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| CN102810668B (en) * | 2012-08-14 | 2015-04-22 | 安徽亚兰德新能源材料股份有限公司 | Lithium ion battery nickel-cobalt-manganese ternary composite anode material and method for preparing precursor thereof |
| CN102810668A (en) * | 2012-08-14 | 2012-12-05 | 安徽亚兰德新能源材料股份有限公司 | Lithium ion battery nickel-cobalt-manganese ternary composite anode material and method for preparing precursor thereof |
| CN103066320A (en) * | 2012-12-27 | 2013-04-24 | 天津力神电池股份有限公司 | Polymer battery and preparation method thereof |
| CN103208645A (en) * | 2012-12-31 | 2013-07-17 | 深圳宏泰电池科技有限公司 | Nano-power battery composed of lithium manganate and graphene and preparation method thereof |
| CN103208645B (en) * | 2012-12-31 | 2015-04-08 | 深圳宏泰电池科技有限公司 | Nano-power battery composed of lithium manganate and graphene and preparation method thereof |
| CN107851838A (en) * | 2015-08-04 | 2018-03-27 | 汽车能源供应公司 | Lithium rechargeable battery |
| CN109075315A (en) * | 2016-03-30 | 2018-12-21 | Nec能源元器件株式会社 | Electrode and its manufacturing method and secondary cell |
| CN109075315B (en) * | 2016-03-30 | 2022-02-01 | 远景Aesc日本有限公司 | Electrode, method for producing same, and secondary battery |
| CN107346832A (en) * | 2017-05-17 | 2017-11-14 | 中国第汽车股份有限公司 | A kind of lithium battery material system |
| CN107546368A (en) * | 2017-09-05 | 2018-01-05 | 沈阳理工大学 | Nickle cobalt lithium manganate ternary based lithium-ion battery positive plate preparation method |
| CN107425195A (en) * | 2017-09-05 | 2017-12-01 | 辽宁来复恒量新能源科技有限公司 | A kind of nickle cobalt lithium manganate ternary based lithium-ion battery positive plate preparation method |
| CN114551796A (en) * | 2022-03-02 | 2022-05-27 | 蜂巢能源科技股份有限公司 | Negative plate, preparation method thereof and lithium battery |
| CN114551796B (en) * | 2022-03-02 | 2024-04-02 | 蜂巢能源科技股份有限公司 | Negative electrode sheet, preparation method thereof and lithium battery |
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