CN102903928A - Paint for anode and cathode of ferric phosphate lithium battery - Google Patents
Paint for anode and cathode of ferric phosphate lithium battery Download PDFInfo
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- CN102903928A CN102903928A CN201210395774XA CN201210395774A CN102903928A CN 102903928 A CN102903928 A CN 102903928A CN 201210395774X A CN201210395774X A CN 201210395774XA CN 201210395774 A CN201210395774 A CN 201210395774A CN 102903928 A CN102903928 A CN 102903928A
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- positive
- ferric phosphate
- phosphate lithium
- negative polarity
- lithium cell
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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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Abstract
The invention discloses a paint for an anode and a cathode of a ferric phosphate lithium battery. The paint contains an anode and cathode additive added with phosphate MPO4 and/or metaphosphate MPO3, wherein M is Na and/or K, and the addition amount accounts for 0.01-2.5wt% of the total weight of the anode and cathode paint; and the particle size of the additive is 0.01-20mu m. A ferric phosphate lithium battery formed by anode and cathode pole plates manufactured from the paint can be used for effectively improving the charge and discharge cycle life under a high-temperature condition, and is applicable to electromobiles and the energy storage field when serving as a high-capacity power battery.
Description
Technical field
The present invention relates to a kind of ferric phosphate lithium cell, specifically relate to ferric phosphate lithium cell both positive and negative polarity coating.
Background technology
Lithium ion battery with monomer whose operating voltage height, high-energy-density density, have extended cycle life, the advantages such as self-discharge rate is little, memory-less effect, environmental protection, be used widely in electronic communication field such as mobile phone, digital camera, PC, MP3 fast.And positive electrode uses the lithium ion battery of LiFePO4 (LiFePO4) made, the advantage such as good with its stability of material, that security performance is good, cost is low, have extended cycle life, be more suitable for being made into jumbo electrokinetic cell, to be used in electric motor car and energy storage field, the pressure that the huge environmental pollution that the solution mankind face 21st century and natural resources are petered out.
But at present because LiFePO4 (LiFePO4) material manufacturing process, the reasons such as technique, cause the consistency of LiFePO4 (LiFePO4) material to be difficult to control, and can contain the fe (Fe) of trace or the ferric iron (Fe3+) that oxidation generates in the material, the existence of fe (Fe) or ferric iron (Fe3+) all is fatal on the impact of the performance of ferric phosphate lithium cell, when especially under hot conditions, carrying out charge and discharge cycles, because fe (Fe) or the existence of ferric iron (Fe3+), cause ferric phosphate lithium cell positive and negative pole material performance to decay fast, battery capacity is fast decay also.When conventional ferric phosphate lithium cell is made at present, LiFePO4 both positive and negative polarity active material, conductive agent and binding agent are only arranged in the ferric phosphate lithium cell positive and negative pole material.Fe or ferric iron can't reduce in the positive and negative pole material, although the normal temperature cycle life of LiFePO4 cell can reach more than 2000 times, but when forming system by a lot of batteries, because the difference of every residing ambient temperature of cell in the system, the individual cell capacity is decayed fast, during especially for electric motor car and energy storage field, because system is huge, heat skewness in the system, local temperature is too high, thereby causes the cycle life of whole system to be had a greatly reduced quality.
Therefore, improve the charge-discharge performance of ferric phosphate lithium cell under hot conditions, the improvement of the large-capacity lithium iron phosphate battery system bulk life time used in electric motor car and energy storage field is had vital effect.
Summary of the invention
The object of the invention is to overcome the weak point of existing ferric phosphate lithium cell, a kind of ferric phosphate lithium cell both positive and negative polarity coating that can improve ferric phosphate lithium cell charge and discharge circulation life under hot conditions is provided.
Technical scheme of the present invention is: ferric phosphate lithium cell both positive and negative polarity coating comprises both positive and negative polarity active material, conductive agent, binding agent.Improvements are the both positive and negative polarity additives that add phosphate MPO4 and/or metaphosphate MPO3 in this both positive and negative polarity coating, and M is Na and/or K in the formula, and the percentage by weight that described both positive and negative polarity additive accounts for both positive and negative polarity coating total amount is 0.01%～2.5%.
The particle diameter of described both positive and negative polarity additive is 0.01～20 μ m.
Ferric phosphate lithium cell both positive and negative polarity coating of the present invention, its positive active material is LiFePO4 (LiFePO4), and negative electrode active material is one or more in native graphite, Delanium, carbonaceous mesophase spherules, tin-based oxide, silicon-base alloy, the titanyl compound.The conductive agent that adopts is one or more in acetylene black, carbon nano-tube, carbon fiber, Graphene, the conductive carbon black.The binding agent that adopts is one or more in the copolymer (NBR) of copolymer (SBR), acrylonitrile multiple copolymer (LA series), acrylonitrile and butadiene of Kynoar (PVDF), polytetrafluoroethylene (PTFE), sodium carboxymethylcellulose (CMC), styrene and butadiene.
The ferric phosphate lithium cell that the present invention relates to, the ferric phosphate lithium cell both positive and negative polarity applying coating that is formed by described ferric phosphate lithium cell both positive and negative polarity additive both positive and negative polarity active material, conductive agent and the binding agent ferric phosphate lithium cell both positive and negative polarity that drying is made on corresponding collector again with barrier film, electrolyte and battery container through encapsulation, change into and make.
The present invention adds one or more of phosphate as additive, metaphosphate in ferric phosphate lithium cell both positive and negative polarity coating, and the addition of additive and particle diameter have rational restriction, fe (Fe) or the existence of ferric iron (Fe3+) can be effectively reduced to the impact of the performance of ferric phosphate lithium cell, thereby the charge and discharge circulation life of ferric phosphate lithium cell under hot conditions can be increased substantially.
Embodiment
A kind of ferric phosphate lithium cell both positive and negative polarity of the present invention additive, both positive and negative polarity and ferric phosphate lithium cell.
The ferric phosphate lithium cell positive and negative pole material that described ferric phosphate lithium cell is comprised of described ferric phosphate lithium cell both positive and negative polarity additive, described ferric phosphate lithium cell both positive and negative polarity active material, described conductive agent and described binding agent be coated in drying is made on the corresponding collector ferric phosphate lithium cell both positive and negative polarity, barrier film, electrolyte and battery container through encapsulation, change into and make.Described LiFePO4 both positive and negative polarity additive accounts for 0.01%～2.5% of ferric phosphate lithium cell positive and negative pole material total weight, described ferric phosphate lithium cell both positive and negative polarity additive level is less than 0.01%, then can not reach purpose of the present invention, if be higher than 2.5%, then can reduce the capacity of ferric phosphate lithium cell.Described ferric phosphate lithium cell both positive and negative polarity additive is that particle diameter is one or more of the phosphate (MPO4, M are metal ion) of 0.01 μ m～20 μ m or metaphosphate (MPO3, M are metal ion).
Below by application example the present invention is described in more details.
Technique is equipped with both positive and negative polarity active material, conductive agent, binding agent routinely, add specific both positive and negative polarity additive, mix the slurry of making respectively the ferric phosphate lithium cell both positive and negative polarity through high-speed stirred, anode and cathode slurry is coated in respectively on aluminium foil and the Copper Foil, then through oven dry, compressing tablet makes respectively the ferric phosphate lithium cell positive/negative plate, with the assembling of ferric phosphate lithium cell positive/negative plate, the fluid injection of making, change into, seal and namely make the ferric phosphate lithium cell with charge-discharge performance under the excellent hot conditions.
The both positive and negative polarity additive that adds respectively among the embodiment 1～8 and ferric phosphate lithium cell test result such as the following table of making:
Claims (2)
1. ferric phosphate lithium cell both positive and negative polarity coating, comprise both positive and negative polarity active material, conductive agent, binding agent, it is characterized in that adding in this both positive and negative polarity coating the both positive and negative polarity additive of phosphate MPO4 and/or metaphosphate MPO3, M is Na and/or K in the formula, and the percentage by weight that described both positive and negative polarity additive accounts for both positive and negative polarity coating total amount is 0.01%～2.5%.
2. a kind of ferric phosphate lithium cell both positive and negative polarity coating according to claim 1, it is characterized in that: the particle diameter of described both positive and negative polarity additive is 0.01～20 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210395774XA CN102903928A (en) | 2012-10-18 | 2012-10-18 | Paint for anode and cathode of ferric phosphate lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210395774XA CN102903928A (en) | 2012-10-18 | 2012-10-18 | Paint for anode and cathode of ferric phosphate lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102903928A true CN102903928A (en) | 2013-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210395774XA Pending CN102903928A (en) | 2012-10-18 | 2012-10-18 | Paint for anode and cathode of ferric phosphate lithium battery |
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| CN (1) | CN102903928A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111725517A (en) * | 2020-07-24 | 2020-09-29 | 天津市捷威动力工业有限公司 | Lithium battery negative electrode slurry and preparation method and application thereof |
| CN112038642A (en) * | 2020-09-25 | 2020-12-04 | 昆山宝创新能源科技有限公司 | Lithium ion battery anode slurry and preparation method and application thereof |
| CN112310341A (en) * | 2019-07-31 | 2021-02-02 | 深圳新宙邦科技股份有限公司 | Lithium ion battery electrode and lithium ion battery comprising same |
| CN114335693A (en) * | 2021-12-28 | 2022-04-12 | 盐城工学院 | High-safety iron-based phosphate sodium ion full cell and preparation method thereof |
| CN114744178A (en) * | 2022-04-29 | 2022-07-12 | 中国有色桂林矿产地质研究院有限公司 | Nano silicon-graphite composite negative electrode material with carbon-coated and aluminum metaphosphate composite modification layer on surface and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102144323A (en) * | 2008-07-15 | 2011-08-03 | 陶氏环球技术公司 | Inorganic binders for battery electrodes and aqueous processing thereof |
| CN102549819A (en) * | 2009-10-13 | 2012-07-04 | 丰田自动车株式会社 | Nonaqueous electrolyte lithium ion secondary battery |
-
2012
- 2012-10-18 CN CN201210395774XA patent/CN102903928A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102144323A (en) * | 2008-07-15 | 2011-08-03 | 陶氏环球技术公司 | Inorganic binders for battery electrodes and aqueous processing thereof |
| CN102549819A (en) * | 2009-10-13 | 2012-07-04 | 丰田自动车株式会社 | Nonaqueous electrolyte lithium ion secondary battery |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112310341A (en) * | 2019-07-31 | 2021-02-02 | 深圳新宙邦科技股份有限公司 | Lithium ion battery electrode and lithium ion battery comprising same |
| CN112310341B (en) * | 2019-07-31 | 2023-03-10 | 深圳新宙邦科技股份有限公司 | Lithium ion battery electrode and lithium ion battery comprising same |
| CN111725517A (en) * | 2020-07-24 | 2020-09-29 | 天津市捷威动力工业有限公司 | Lithium battery negative electrode slurry and preparation method and application thereof |
| CN111725517B (en) * | 2020-07-24 | 2023-08-18 | 天津市捷威动力工业有限公司 | Lithium battery negative electrode slurry and preparation method and application thereof |
| CN112038642A (en) * | 2020-09-25 | 2020-12-04 | 昆山宝创新能源科技有限公司 | Lithium ion battery anode slurry and preparation method and application thereof |
| CN114335693A (en) * | 2021-12-28 | 2022-04-12 | 盐城工学院 | High-safety iron-based phosphate sodium ion full cell and preparation method thereof |
| CN114335693B (en) * | 2021-12-28 | 2023-09-12 | 盐城工学院 | High-safety iron-based phosphate sodium ion full battery and preparation method thereof |
| CN114744178A (en) * | 2022-04-29 | 2022-07-12 | 中国有色桂林矿产地质研究院有限公司 | Nano silicon-graphite composite negative electrode material with carbon-coated and aluminum metaphosphate composite modification layer on surface and preparation method thereof |
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Application publication date: 20130130 |