锂离子电池阻燃添加剂TDCPP的研究
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摘要
为了提高锂离子电池的安全性,在1 mol/L LiPF_6/(EC+EMC+DMC)(质量比为1∶1∶1)溶液中加入三(1,3-二氯异丙基)磷酸酯(TDCPP)组成阻燃电解质。并采用燃烧测试、热学性能以及电化学性能测试等方法对其性能进行了研究。结果表明,5%~10%的TDCPP就能取得良好的阻燃效果,含10%TDCPP电池在150℃环境温度下高温测试,电池不失控。10%TDCPP在电池100次的循环过程中不破坏石墨电极的形貌,不影响SEI膜的形成。
In order to improve the safety performance of lithium ion battery,flame retardant electrolytes are prepared by adding tris( 1,3-Dichloro-2-propyl) phosphate( TDCPP) in 1 mol·L~(-1) LiPF_6/( EC+EMC+DMC)( with a mass ratio of 1 ∶1 ∶1) solution. The performances of the prepared electrolytes are studied through combustion test,thermal property detection and electrochemical performances test.The results show that the battery containing 5%-10% TDCPP only can achieve an ideal flame retardant effect. The battery containing 10% TDCPP does not run away when it is tested at the oven temperature of 150℃.Neither the morphology of graphite electrode after 100 cycling,nor the formation of the SEI film on the surface of the graphite anode are affected by 10% TDCPP.
In order to improve the safety performance of lithium ion battery,flame retardant electrolytes are prepared by adding tris( 1,3-Dichloro-2-propyl) phosphate( TDCPP) in 1 mol·L~(-1) LiPF_6/( EC+EMC+DMC)( with a mass ratio of 1 ∶1 ∶1) solution. The performances of the prepared electrolytes are studied through combustion test,thermal property detection and electrochemical performances test.The results show that the battery containing 5%-10% TDCPP only can achieve an ideal flame retardant effect. The battery containing 10% TDCPP does not run away when it is tested at the oven temperature of 150℃.Neither the morphology of graphite electrode after 100 cycling,nor the formation of the SEI film on the surface of the graphite anode are affected by 10% TDCPP.
引文
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[2]Katarzyna C H,Henrik L,Susanne W,et al.Impact of the flame retardant additive triphenyl phosphate(TPP)on the performance of graphite/Li Fe PO4cells in high power applications[J].Journal of Power Sources,2014,256,(15):430-439.
[3]Zhou M J,Qin C Y,Liu Z L,et al.Enhanced high voltage cyclability of Li Co O2cathode by adopting poly[bis-(ethoxyethoxyethoxy)phosphazene]with flame-retardant property as an electrolyte additive forlithium-ion batteries[J].Applied Surface Science,2017,403(1):260-266.
[4]贺艳兵.锂离子电池阻燃剂的研究和开发[D].天津:天津大学,2007:34-59.
[5]任春燕.锂离子电池电解液用安全性添加剂的研究[D].长沙:中南大学,2012:19-21.
[6]陈玉红.锂离子电池Li Co1/3Ni1/3Mn1/3O2正极材料及安全性的研究[D].天津:天津大学,2007:107-125.
[7]陈玉红,汪亮,孙娜,等.TCEP和环基苯对F型锂离子电池的复合作用[J].电源技术,2014,138(7):1243-1245.
[8]贺艳兵,唐致远,陈玉红,等.锂离子电池阻燃剂磷酸三(β-氯乙基)酯[J].化学通报,2007,(3):212-216.
[9]Karen E,Thomas A,John N M.Modeling the behavior of electroactive polymers for overcharge protection of lithium batteries[J].J Electrochem Soc,2004,151(4):A509-A521.
[10]Ota H,Kominato A,Chun W J,et al.Effect of cyclic phosphate additive in non-flammable electrolyte[J].J Power Sources,2003,119-121:393-398