中国物理B ›› 2017, Vol. 26 ›› Issue (7): 78201-078201.doi: 10.1088/1674-1056/26/7/078201

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Conductivity and applications of Li-biphenyl-1, 2-dimethoxyethane solution for lithium ion batteries

Geng Chu(褚赓), Bo-Nan Liu(刘柏男), Fei Luo(罗飞), Wen-Jun Li(李文俊), Hao Lu(陆浩), Li-Quan Chen(陈立泉), Hong Li(李泓)   

  1. 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 Department of Chemistry, Tsinghua University, Beijing 100084, China
  • 收稿日期:2017-02-03 修回日期:2017-03-21 出版日期:2017-07-05 发布日期:2017-07-05
  • 通讯作者: Hong Li E-mail:hli@iphy.ac.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant No.52315206),the Ministry of Science and Technology of China (Grant No.2016YFB0100100),and the Beijing Municipal Science and Technology Commission,China (Grant No.D151100003115003).

Conductivity and applications of Li-biphenyl-1, 2-dimethoxyethane solution for lithium ion batteries

Geng Chu(褚赓)1, Bo-Nan Liu(刘柏男)1, Fei Luo(罗飞)2, Wen-Jun Li(李文俊)1, Hao Lu(陆浩)1, Li-Quan Chen(陈立泉)1, Hong Li(李泓)1   

  1. 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 Department of Chemistry, Tsinghua University, Beijing 100084, China
  • Received:2017-02-03 Revised:2017-03-21 Online:2017-07-05 Published:2017-07-05
  • Contact: Hong Li E-mail:hli@iphy.ac.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant No.52315206),the Ministry of Science and Technology of China (Grant No.2016YFB0100100),and the Beijing Municipal Science and Technology Commission,China (Grant No.D151100003115003).

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摘要：

The total conductivity of Li-biphenyl-1,2-dimethoxyethane solution (LixBp(DME)9.65, Bp=biphenyl, DME=1,2-dimethoxyethane, x=0.25, 0.50, 1.00, 1.50, 2.00) is measured by impedance spectroscopy at a temperature range from 0℃ to 40℃. The Li1.50Bp(DME)9.65 has the highest total conductivity 10.7 mS/cm. The conductivity obeys Arrhenius law with the activation energy (Ea(x=0.50)=0.014 eV, Ea(x=1.00)=0.046 eV). The ionic conductivity and electronic conductivity of LixBp(DME)9.65 solutions are investigated at 20℃ using the isothermal transient ionic current (ITIC) technique with an ion-blocking stainless steal electrode. The ionic conductivity and electronic conductivity of Li1.00Bp(DME)9.65 are measured as 4.5 mS/cm and 6.6 mS/cm, respectively. The Li1.00Bp(DME)9.65 solution is tested as an anode material of half liquid lithium ion battery due to the coexistence of electronic conductivity and ionic conductivity. The lithium iron phosphate (LFP) and Li1.5Al0.5Ti1.5(PO4)3 (LATP) are chosen to be the counter electrode and electrolyte, respectively. The assembled cell is cycled in the voltage range of 2.2 V–3.75 V at a current density of 50 mA/g. The potential of Li1.00Bp(DME)9.65 solution is about 0.3 V vs. Li+/Li, which indicates the solution has a strong reducibility. The Li1.00Bp(DME)9.65 solution is also used to prelithiate the anode material with low first efficiency, such as hard carbon, soft carbon and silicon.

关键词: lithium solution, ionic and electronic conductivity, flow lithium ion battery, prelithiation

Abstract:

The total conductivity of Li-biphenyl-1,2-dimethoxyethane solution (LixBp(DME)9.65, Bp=biphenyl, DME=1,2-dimethoxyethane, x=0.25, 0.50, 1.00, 1.50, 2.00) is measured by impedance spectroscopy at a temperature range from 0℃ to 40℃. The Li1.50Bp(DME)9.65 has the highest total conductivity 10.7 mS/cm. The conductivity obeys Arrhenius law with the activation energy (Ea(x=0.50)=0.014 eV, Ea(x=1.00)=0.046 eV). The ionic conductivity and electronic conductivity of LixBp(DME)9.65 solutions are investigated at 20℃ using the isothermal transient ionic current (ITIC) technique with an ion-blocking stainless steal electrode. The ionic conductivity and electronic conductivity of Li1.00Bp(DME)9.65 are measured as 4.5 mS/cm and 6.6 mS/cm, respectively. The Li1.00Bp(DME)9.65 solution is tested as an anode material of half liquid lithium ion battery due to the coexistence of electronic conductivity and ionic conductivity. The lithium iron phosphate (LFP) and Li1.5Al0.5Ti1.5(PO4)3 (LATP) are chosen to be the counter electrode and electrolyte, respectively. The assembled cell is cycled in the voltage range of 2.2 V–3.75 V at a current density of 50 mA/g. The potential of Li1.00Bp(DME)9.65 solution is about 0.3 V vs. Li+/Li, which indicates the solution has a strong reducibility. The Li1.00Bp(DME)9.65 solution is also used to prelithiate the anode material with low first efficiency, such as hard carbon, soft carbon and silicon.

Key words: lithium solution, ionic and electronic conductivity, flow lithium ion battery, prelithiation

中图分类号:  (Lithium-ion batteries)

  • 82.47.Aa
82.45.Fk (Electrodes) 72.60.+g (Mixed conductivity and conductivity transitions)