A Novel Aminoalkylsilane Compound with Oligo（ethylene oxide） Units as Effective Additive for Improving Cyclability of Lithium-ion Batteries
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2013年第10期
论文作者：Suqing Wang Jinglun Wang Hao Luo Xinyue Zhao Lingzhi Zhang
文章页码：943 - 947
摘 要：A new aminoalkylsilane compound,（（2-（2-（N,N-dimethylamino）ethoxy）ethoxy） methyl）trimethylsilane（TMSC1N2） based on the oligo（ethylene oxide） chain end-capped with organosilicon functional group and alkylamine group on each end,was introduced as an electrolyte additive for lithium-ion batteries.Electrochemical performances of different volume ratios of TMSC1N2 in the baseline electrolyte were conducted through cyclic voltammetry,electrochemical impedance spectroscopy and galvanostatic charge/discharge tests of lithium-ion batteries.With adding 5 vol.% TMSC1N2 to the baseline electrolyte（1 mol/L LiPF6in ethylene carbonate and diethyl carbonate（EC:DEC 1:1,in volume））,the capacity retention of LiFePO4/Li cells could be significantly improved from 74.7% to 90.8% after 130 cycles.Furthermore,TMSC1N2 showed good compatibility with graphite electrode and would not deteriorate the electrochemical performance of graphite/Li anode cells.These data suggested that TMSC1N2 could be utilized as an effective additive for lithium-ion batteries.
Suqing Wang，Jinglun Wang，Hao Luo，Xinyue Zhao，Lingzhi Zhang
Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences
摘 要：A new aminoalkylsilane compound,（（2-（2-（N,N-dimethylamino）ethoxy）ethoxy） methyl）trimethylsilane（TMSC1N2） based on the oligo（ethylene oxide） chain end-capped with organosilicon functional group and alkylamine group on each end,was introduced as an electrolyte additive for lithium-ion batteries.Electrochemical performances of different volume ratios of TMSC1N2 in the baseline electrolyte were conducted through cyclic voltammetry,electrochemical impedance spectroscopy and galvanostatic charge/discharge tests of lithium-ion batteries.With adding 5 vol.% TMSC1N2 to the baseline electrolyte（1 mol/L LiPF6in ethylene carbonate and diethyl carbonate（EC:DEC 1:1,in volume））,the capacity retention of LiFePO4/Li cells could be significantly improved from 74.7% to 90.8% after 130 cycles.Furthermore,TMSC1N2 showed good compatibility with graphite electrode and would not deteriorate the electrochemical performance of graphite/Li anode cells.These data suggested that TMSC1N2 could be utilized as an effective additive for lithium-ion batteries.
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