Vapor-grown and graphitized carbon fibers process for preparing same molded members thereof and composite members thereof
AssigneeNikkiso Co., Ltd.
InventorsMinoru Harada, Masanori Niiyama
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Abstract
A secondary battery with a negative electrode having an anode active material, a positive electrode, and a non-aqueous electrolyte, has its anode active material provided with vapor-grown and graphitized carbon fibers having a mean fiber diameter of 5 .mu.m or smaller, a mean length of 90 .mu.m or shorter, a mean aspect ratio of from 1 to 18, and a spin density of 8.times.10.sup.18 spins/g or less, when measured by the electron spin resonance absorption method.
Claims13
In a secondary battery having a negative electrode with an anode active material, a positive electrode, and a non-aqueous electrolyte, the improvement wherein said anode active material comprises vapor-grown and graphitized carbon fibers having a mean fiber diameter of 5 .mu.m or smaller, a mean length of 90 .mu.m or shorter, a mean aspect ratio of from 1 to 18, and a spin density of 8.times.10.sup.18 spins/g or less, when measured by the electron spin resonance absorption method.
Dependencies are inferred from the claim text.