McDermott Will & Emery LLP
Electrochemical energy storage device
An electrochemical energy storage device includes a negative electrode which contains a carbon material and has a negative electrode potential of 1.4 V or less relative to a lithium reference when being charged, and a non-aqueous electrolyte solution prepared by dissolving a lithium salt, an ammonium salt, and at least one kind of fluorinated benzene selected among hexafluorobenzene, pentafluorobenzene, 1,2,3,4-tetrafluorobenzene, 1,2,3,5-tetrafluorobenzene, 1,2,4,5-tetrafluorobenzene and 1,2,3-trifluorobenzene, in a non-aqueous solvent.
Panasonic Corporation
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Hiroshi Masaki Tooru
Yoshizawa Deguchi Matsui