Daikin Kogyo Co., Ltd.

Tutomu Kamihigoshi

Satoshi Koyama

Kazuo Okamura

Tadayuki Maeda

An active material for batteries or cells having improved discharge characteristics and comprising a fluorinated graphite produced by fluorination of graphite with fluorine, the fluorinated graphite containing substantially no unreacted graphite and having a degree of fluorination such that the weight or fluorine content thereof is increased by a further fluorination under conditions equal to or severer than the fluorination conditions adopted to the production of the fluorinated graphite. The use of artificial graphite having a Franklin's P-value of at least 0.45 as a starting material is effective for further improving the discharge voltage and the capacity.

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Takatsuki, Japan

Tutomu Kamihigoshi