《磷酸铁锂动力电池的高低温性能解决途径》由会员分享，可在线阅读，更多相关《磷酸铁锂动力电池的高低温性能解决途径（12页珍藏版）》请在金锄头文库上搜索。
1、UniversityApproaches to improve the electrochemicalperformance of LiFePO4-based lithium ionbatteries working in a wide temperature range磷酸铁锂动力电池的高低温性能解决途径Zi-Feng MaDepartment of Chemical EngineeringShanghai Jiao Tong University,Shanghai 200240, ChinaEmail: Introduction前期工作基础:上海交通大学在LiFePO4正极材料制备新工艺方
2、面，获得6项中国发明专利（专利号:ZL 200410018476.4等）；2004年开始与浙江横店东磁股份有限公司合作开展产业 化技术开发，获得2006年浙江省产业化转化项目，2008年初完成中试线。Mechanical chemical reactionFe+2FePO4+U3PO4.0.5H2O -*3LiFePO4 + 0.5H2O Xiao-Zhen Liao. Zi-Fcng Ma*, Liang Wang, Xiao-Ming Zhang, Yi Jiang, Yu-Shi He, Electrochem. Solid-State Lett. 2004, 7(12)： A522-5
3、25 (SCI Cited 33) Xiao-Zhen Liao, Zi-Feng Maj Yu-Shi He, Xia Zhanj9 Lian* Wang, Journal of the Electrochemical Society. 2005, 152(10):A1969-1972 (SCI cited 25)200X年全国优秀博士学位论文提名奖：2007年上海市优秀博士学位论文Unkveralty再分级处理现有生产能力：年产150吨磷酸铁锂正极材料 近期目标：合资建立磷酸铁锂动力电池生产线IntroductionIn winter, the electric vehicle have
4、to be started at low temperature and the battery need to keep better performanceIntroductionApproaches to enhance the performance of LiFePO4/C cathode at low temperatureCathode: particle size minimization or dopingElectrolyte:Solvent selection: affects liquid temperature range and viscosity, and par
5、ticipating in the formation of a solid electrolyte interface (SEI), the resistance of which is main resistance in the full czll(两元.三元或四元) Lithium salt: LiPF6, LiBF4, LiBOB et alK. Amine9 J. Lili, I. Belharouak, Electrochein. Commiin. 7 (2005) 669.LiFePO4/C低温性能研究L()m(0.9LiBF4-()JLiBOB) 1:1:3 PC/EC/EM
6、C electrolyte/vgfso-O- x13Capacity / mAh g1r20406080Capacity / mAh g1Discharge curves of Li/LiFePO4 cell with a 1.0m(0.9UBF4-0.1UBOB) 1:1:3 PC/EC/EMC electrolyte, which were recorded at 1C by charging the cell at 20 C and then discharging at a specific temperatureEffect of salt ratio on the discharg
7、e voltage of Li/LiFePO4 cells, which was measured at 1C by charging the cell at 20 C and then discharging at -30 “C.S.S.Zhang9 K.Xi“ T.R.Jow J Power Sources 159(2006) 702-707LiFePO4/C低温性能研究leOM LiPFe/EC+DMC+DEC+EMCv/v) electrolyte020406080100120140Capacity / mAh/gn、n .5 / gsoAn.n s O6el-OA0204060801
8、00120140160Capacity / mAh/gWe studied the low temperature performanee of LiFePO/C cathode in a quaternary carbonate-based electrolyte The discharge capacities of the LiFePO/C cathode were about 134.5 mAh/g (20C), 114 mAh/g (0C), 90 mAh/g (-20C) and 69 mAh/g (40C) using a 1C charge-discharge rate.X.-
9、Z. Liao et al. / Electrochemistry Communications 10 (2008) 691-694UniversityLiFePO4/C低温性能研究uimo/ze-tTOO 200300SOO X只TempRQ)Rp(ft)R)D (cm%)20 C4.6786.968.2I.70X !0120* C5.93101.1124.3l.55XK)n-20 C7.88120.0315.12.05 XIO1340。C13.04126.32005.42.I2XIO*4Re Z / OhmThe improving of the reaction activity of
10、the electrolyte-active material in terface by surface modification and electrolyte optimization, increasing the lithium diffusion abilityUniversityLiFePO4/C高温性能研究Three solutions to enhance the cycling performance of LiFePO4/C cathode working at high temperature It is based on similar reason that is
11、to prevent Fe( II) ions dissolving. Electrolyte Anode CathodeJiao Tong UniversityElectrolyte Design1-2M LiPF6/ EC+PC+DMC (1:1:3) electrolyte0.7M LiBOB/ EC+PC+DMC (1:1:3) electrolyteFig. 9. Amount of Fc* ions dissolved from C-LiFcPO4 powder that lusbeenagedin I2M LiPFCPC DMC U:l:3)and 0.7 M LiBOB/ tC
12、:PC DMC (1:1:3) for one week al 55 CEaa wuo。丄0.0-1 1.204060Cyde Number80 100Eig. & Cycling pcrfbnuance of C-LiFePOyLuTisO:： cell al 55 C usinu 1.2 M LiPF. ECfPC/DMC (I 1:3) dectrolvtc.2 0 8 6 4 2 1.1.O Q a o 66 woBdB。poNaEJONK.Amine9 J.Liu, I.BeUiarouak, Electrochem. Commun. 7(2005)669-673Jiao Tong
13、University1.0m(0.9LiBF4-(h 1 LiBOB) 1:1:3 PC/EC/EMC electrolytel6 lllu / Aloedeo500050Cycle NumberComparison of the cycling performance at high temperature for the Li/LiFePO4 cells with different electrolytes, in which the cells were charged and discharged at 1C.S.S.Zhang, K.Xu, T.R.Jow, J Power Sou
14、rces 159(2006) 702-707JTTETTESriUnlverftityAnode coatingLiFePO4 particles were coated with TiO2 (molar ratio = 3%) via a sol-gel processCycle performance of LiFePC)4/MCMB cells with different metal coatings, including Au, Cu, Fe, Co, Ni, and Ti on the MCMB electrode surface. All the cells were cycled at 1 C charge/discharge rate at 55 C in the voltage window of 2.54.0 V.Chang et al. / Journal of Power Sources 185 (2008) 466-472LiFe(PO4)1.xFx/C cathode60100200300Cycle number80z4020ga0111116ZVUJ - A_oeds18016014012010080606左圣
