NEGATIVE ELECTRODE ACTIVE SUBSTANCE FOR ELECTRICAL DEVICE AND ELECTRICAL DEVICE USING SAME

Title:

NEGATIVE ELECTRODE ACTIVE SUBSTANCE FOR ELECTRICAL DEVICE AND ELECTRICAL DEVICE USING SAME

Document Type and Number:

WIPO Patent Application WO/2017/216939

Kind Code:

A1

Abstract:

[Problem] To provide a means for achieving both cycle durability and charging-discharging efficiency in an electrical device such as a lithium ion secondary battery. [Solution]A negative electrode active substance used in the electric device is characterized by: comprising a silicon-containing alloy having a ternary alloy composition represented by Si-Sn-Ti and having a structure including, dispersed in a parent phase that is a silicide phase containing TiSi2, an a-Si phase containing non-crystalline or low-crystallinity silicon wherein tin is in a solid solution within a silicon crystal structure; and satisfying the relationship S(2) > S(1) in a radial wave function observed by XAFS, where S(1) is the peak intensity of the Si-O bond peak observed at a position of 0.13 nm in inter-atomic distance, and S(2) is the peak intensity of the Si-Si bond peak observed at a position of 0.2 nm in inter-atomic distance.

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Inventors:

YOSHIOKA YOUICHI (JP)
CHIBA NOBUTAKA (JP)
WATANABE MANABU (JP)
ARAI MASAYA (JP)

Application Number:

PCT/JP2016/068016

Publication Date:

December 21, 2017

Filing Date:

June 16, 2016

Export Citation:

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Assignee:

NISSAN MOTOR (JP)

International Classes:

H01M4/38; C01B33/06

Foreign References:

JP2001256974A	2001-09-21
JP2013134905A	2013-07-08

Other References: