Negative electrode active material and negative electrode...

Details Negative electrode active material and negative electrode... Negative electrode active material and negative electrode...

2006-11-24

2011-12-06

Crepeau, Jonathan (Department: 1725)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

C423S325000, C427S126300, C427S255280

Reexamination Certificate

active

08071237

ABSTRACT:
In a negative electrode active material for a lithium ion secondary battery including a silicon oxide capable of absorbing and desorbing lithium ions, a silicon oxide having structural units each in the form of a tetrahedron in which a silicon atom is located at its center and silicon or oxygen atoms are located at its four vertices is used. The structural units are arranged randomly to form an amorphous structure. In the case that the number of oxygen atoms located at the four vertices in the structural units is represented by n (n=0, 1, 2, 3 or 4) and the structural units are represented by Si(n), the number of the structural units NSi(n) in the silicon oxide satisfies the following relations (1) to (3).[Formula⁢⁢1]NSi⁡(0)∑NSi⁡(n)≥0.1(1)Nsi⁡(4)∑NSi⁡(n)≤0.1(2)Nsi⁡(1)+NSi⁡(2)+Nsi⁡(3)≠0(3)

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