Imidazolium-Based Room-Temperature Ionic Liquid for Lithium Secondary Batteries: Relationships between Lithium Salt Concentration and Battery Performance Characteristics

Relationships between the lithium salt concentration in a low-volatility solvent (room-temperature ionic liquid) and lithium secondary battery performance characteristics were investigated by using [LMO positive electrode | DMPIm-TFSA + LiTFSA binary electrolyte | lithium metal negative electrode] c...

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Bibliographic Details
Published in:ECS electrochemistry letters 2012-09, Vol.1 (6), p.A77-A79
Main Authors: Seki, Shiro, Ohno, Yasutaka, Mita, Yuichi, Serizawa, Nobuyuki, Takei, Katsuhito, Miyashiro, Hajime
Format: Article
Language:English
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Summary:Relationships between the lithium salt concentration in a low-volatility solvent (room-temperature ionic liquid) and lithium secondary battery performance characteristics were investigated by using [LMO positive electrode | DMPIm-TFSA + LiTFSA binary electrolyte | lithium metal negative electrode] cells. Charge/discharge cycle and rate performance characteristics and various changes in resistance (lithium salt concentration and cycle number dependences) were examined, and the necessity of a suitable lithium salt concentration (0.32-0.64 mol kg−1) for good capacity retention and rate capability was concluded.
ISSN:2162-8726
2162-8734
DOI:10.1149/2.003206eel