Mesophase pitch-based carbon fiber for use in negative electrode

Details Mesophase pitch-based carbon fiber for use in negative electrode Mesophase pitch-based carbon fiber for use in negative electrode

1996-04-29

1999-09-14

Skapars, Anthony

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

4234472, 264 292, 4292318, D01F 912

Patent

active

059519592

ABSTRACT:
A mesophase pitch-based carbon fiber for use as a material for a negative electrode of a secondary battery, and a process for producing the same. The mesophase pitch-based carbon fiber comprises a columnar core part having a texture composed of a plurality of graphite layers extending along an axial direction and extending with minute flexures in a plane perpendicular to the axis and an outer-shell part surrounding the core part. The outer-shell part has a texture composed of a laminate of a plurality of graphite layers extending along an axial direction. The graphite layers are oriented in a plane perpendicular to the axis in a fashion such that the graphite layers extend along a circumferential direction with minute flexures while gradually receding from a center of the core part. In the carbon fiber, the graphite layers composing the outer-shell part have a laminate face forming a surface of the outer-shell part, channels permitting entry and exit of lithium ions being formed between graphite layers at the laminate face.

REFERENCES:
Carbon, vol. 29, No. 1, pp. 51-60, 1991, T. L. Dhami, et al., "Oxidation Behaviour of Pitch Based Carbon Fibers" No month.
J. Electrochem. Soc., vol. 140, No. 2, pp. 315-320, Feb. 1993, N. Imanishi, et al., "Charge-Discharge Characteristics of Mesophase-Pitch-Based Carbon Fibers for Lithium Cells".

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