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CARBON MATERIAL FOR NEGATIVE ELECTRODE OF SECONDARY LITHIUM BATTERY, PROCESS FOR PREPARING THE SAME, AND SECONDARY LITHIUM BATTERY PREPARED FROM SAID CARBON MATERIAL
CARBON MATERIAL FOR NEGATIVE ELECTRODE OF SECONDARY LITHIUM BATTERY, PROCESS FOR PREPARING THE SAME, AND SECONDARY LITHIUM BATTERY PREPARED FROM SAID CARBON MATERIAL
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机译:次级锂电池负极的碳材料,制备方法及由所述碳材料制备的次级锂电池
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摘要
A graphite material satisfying the following requirements: (A) a d002 value of not more than 0.336nm; (B) a CI value of not less than 0.019 as determind by equation (I) wherein D represents the density, c0 and Lc respectively represent the lattice constant and the grain size in the c-axis direction, a0 and La respectively represent the lattice constant and the grain size in the a-axis direction, and the superscript @ i" represents that the value is one for an ideal graphite; and (C) a discharge capacity exceeding 372 Ah/kg. The use of the above graphite material or a carbon material coated with a lowly crystalline carbon as the carbon material for a negative electrode can provide a secondary lithium battery having high discharge capacity and initial efficiency. The carbon material coated with a lowly cristalline carbon can be prepared by a immersing a graphite material in an organic compound, washing the graphite material with an organic solvent, and then conducting carbonization. MATH
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