Non-aqueous liquid electrolyte and non-aqueous liquid electrolyte secondary battery

a technology of non-aqueous liquid electrolyte and secondary battery, which is applied in the direction of non-aqueous electrolyte cells, cell components, electrochemical generators, etc., can solve the problems of discharge capacity retention rate, inadequacies in charge-discharge cycle for longer-term performan
US20090325065A1Inactive Publication Date: 2009-12-31MITSUBISHI CHEM CORP
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
MITSUBISHI CHEM CORP
Publication Date
2009-12-31
Estimated Expiration
Not applicable · inactive patent

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Abstract

A non-aqueous liquid electrolyte secondary battery using negative-electrode active material having Si, Sn and / or Pb, with high charge-capacity, superior characteristics including discharge-capacity retention rate over long is provided. Its non-aqueous liquid electrolyte contains carbonate having unsaturated bond and / or halogen and compounds like LiPF6 and / or LiBF4 (first lithium salt) and lithium salt different from said first one, represented by formula below (second lithium salt).Lil(αmXan)
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Description

TECHNICAL FIELD

[0001] The present invention relates to a non-aqueous liquid electrolyte and non-aqueous liquid electrolyte secondary battery using the same. Particularly, it relates to a non-aqueous liquid electrolyte, which shows superior charge-discharge cycle performance when used for a non-aqueous liquid electrolyte secondary battery utilizing a negative-electrode active material having at least one kind of atom selected from the group consisting of Si atom, Sn atom and Pb atom, and also relates to a non-aqueous liquid electrolyte secondary battery using the non-aqueous liquid electrolyte.BACKGROUND ART

[0002] In recent years, with the reduction in weight and size of electrical appliances, development of a non-aqueous liquid electrolyte secondary battery having high energy density, for example lithium secondary battery, has been advanced. Also, as application field of lithium secondary battery is expanded, further improvement in its battery characteristics has been desired.

[0003] ...

Claims

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