Preparation and Characterization of Lithium Ion Conducting Glass–Polymer Composites

Hayashi, Akitoshi; Kitade, Taku; Ikeda, Yuko; Kohjiya, Shinzo; Matsuda, Atsunori; Tatsumisago, Masahiro; Minami, Tsutomu

doi:10.1246/cl.2001.814

Cited by 8 publications

(2 citation statements)

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“…Hybrid electrolytes are blends of organic liquid electrolytes, ionic liquids, polymer electrolytes, and/or inorganic solid electrolytes: Polymer + organic liquid (polymer gel) − Ionic liquid + polymer electrolyte (ionic liquid polymer gel) − Ionic liquid + polymer electrolyte + liquid organic electrolyte , Ionic liquid + liquid organic electrolyte Polymer electrolyte + inorganic solid electrolyte − …”

Section: Electrolytesmentioning

confidence: 99%

“…Polymer þ organic liquid (polymer gel) [37][38][39][40] Ionic liquid þ polymer electrolyte (ionic liquid polymer gel) [41][42][43][44][45] Ionic liquid þ polymer electrolyte þ liquid organic electrolyte 43,44 Ionic liquid þ liquid organic electrolyte 19 Polymer electrolyte þ inorganic solid electrolyte [46][47][48] The mixtures of two or more electrolytes are investigated in attempts to exploit the advantages of each constituent, but the disadvantages of each also appear. For example, the ionic conductivity is increased in the polymer gel electrolytes, but they are still flammable and have the irreversible capacity loss below 1 V associated with formation of a passivation layer.…”

Section: Electrolytesmentioning

confidence: 99%

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Challenges for Rechargeable Li Batteries

2009

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The challenges for further development of Li rechargeable batteries for electric vehicles are reviewed. Most important is safety, which requires development of a nonflammable electrolyte with either a larger window between its lowest unoccupied molecular orbital (LUMO) and highest occupied molecular orbital (HOMO) or a constituent (or additive) that can develop rapidly a solid/electrolyte-interface (SEI) layer to prevent plating of Li on a carbon anode during a fast charge of the battery. A high Li+-ion conductivity (σLi > 10−4 S/cm) in the electrolyte and across the electrode/electrolyte interface is needed for a power battery. Important also is an increase in the density of the stored energy, which is the product of the voltage and capacity of reversible Li insertion/extraction into/from the electrodes. It will be difficult to design a better anode than carbon, but carbon requires formation of an SEI layer, which involves an irreversible capacity loss. The design of a cathode composed of environmentally benign, low-cost materials that has its electrochemical potential μC well-matched to the HOMO of the electrolyte and allows access to two Li atoms per transition-metal cation would increase the energy density, but it is a daunting challenge. Two redox couples can be accessed where the cation redox couples are “pinned” at the top of the O 2p bands, but to take advantage of this possibility, it must be realized in a framework structure that can accept more than one Li atom per transition-metal cation. Moreover, such a situation represents an intrinsic voltage limit of the cathode, and matching this limit to the HOMO of the electrolyte requires the ability to tune the intrinsic voltage limit. Finally, the chemical compatibility in the battery must allow a long service life.

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