Lithium ion battery
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United States of America Patent
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Mar 20, 2018
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N/A
app pub date -
May 15, 2012
filing date -
Jul 14, 2011
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Abstract
The purpose of the present invention is to provide a lithium-ion battery that exhibits excellent long-term life properties, does not suffer from rapid capacity degradation, and exhibits excellent charging/discharging characteristics in low-temperature environments. The present invention is directed to a lithium ion battery comprising: a negative electrode which comprises a negative electrode active material containing at least one of a graphite and an amorphous carbon, conductive additives containing a graphite, and a binder; a nonaqueous electrolyte solution; and a positive electrode containing a positive electrode active material capable of occluding and releasing lithium. The negative electrode active material has a spherical or massive shape, the conductive additives have a platy shape, and a part of an edge surface of the conductive additives contacts a surface of the negative electrode active material. The nonaqueous electrolyte solution contains a solvent, and an additive which reductively decomposes at a voltage lower than a reduction voltage of the solvent.
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