Fabrication and electrochemical performance of lithium polymer battery using mesoporous silica/polymer hybrid electrolyte

DOI Web Site 参考文献23件
  • NAKAYAMA Masanobu
    Department of Materials Science and Engineering, Nagoya Institute of Technology Japan Science and Technology Agency, PRESTO Unit of Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University
  • OKAJIMA Takashi
    Department of Materials Science and Engineering, Nagoya Institute of Technology
  • YAMAMOTO Yoshihiro
    Department of Materials Science and Engineering, Nagoya Institute of Technology
  • BABA Shinji
    Department of Materials Science and Engineering, Nagoya Institute of Technology
  • IIZUKA Kaede
    Department of Materials Science and Engineering, Nagoya Institute of Technology R&D division, World Interc Co., Ltd.
  • NOGAMI Masayuki
    Department of Materials Science and Engineering, Nagoya Institute of Technology
  • MOCHIZUKI Dai
    Department of Applied Chemistry, Tokyo Institute of Technology
  • KIGUCHI Takanori
    Institute for Materials Research, Tohoku University
  • KUROKI Shigeki
    Department of Organic and Polymeric Materials, Tokyo Institute of Technology

抄録

Development of all solid-state Li secondary based on the use of dry polymer or inorganic electrolytes is vital as they will be free of solvent leakages and improve inflammability. However, both are still under development for many years due to low ionic conductivity, poor mechanical property and/or large internal impedance associated to poorly defined interfaces. In this paper, we report on a preparation and physicochemical property of mesoporous silica (MPS)/Li conductive polyethylene oxide (Li-PEO)-based polymer hybrid electrolytes (MPS+Li-PEO), and electrochemical performance of the Li/MPS+Li-PEO/LiFePO4 cell. The hybrid electrolytes showed an improvement of Li+ transportation number and a decrease of melting point and glass transition temperature, indicating a positive hybrid effect, or deviation from rule-of-mixtures behavior. The Li/MPS+Li-PEO/LiFePO4 cell showed a stable charge–discharge capacity of >70 mA h g−1 for 100 cycles at moderate temperature of 60°C and rate of 0.2 C, whereas severe capacity fade began after several of cycles for the cell using conventional Li-PEO electrolyte. AC impedance measurements revealed that the interface Li exchange between electrode and electrolytes related to the stable cyclic performance for the cell using hybrid electrolytes.

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