Studies on the Structure of LiNi0.3Co0.7O2and the Behaviorof Its Lithium Battery

Abstract

Abstract: XRD, XPS and CV have been used to study the structure of LiNi_0.3Co_0.7O₂ and the behavior of its lithium battery. It is shown that LiNi_0.3Co_0.7O₂ has a space group R3m with hexagonal parameter a=0. 2826 nm,c=1. 4130 nm. Li₂O was identified on its surface. Its lithium battery exhibited a discharge capacity of 120-140 mA. h. g^-1at the rate of 0. 5-0. 1 mA. cm^-2in the voltage range of 4. 30-3. 00 Vin 1mol. L^-1LiClO₄/PCsystem. The discharge mechanism of the battery involved a two-stage Li⁺intercalation in LiNi_0.3Co_0.7O₂.Also, the chemical diffusion coefficent of Li⁺in Li_xNi_0.3Co_0.7O₂ is about 1-7×10^-8cm²· s^-1in the range of x from 0. 775 to 1.

Key words: Lithium battery, Lithium nickel cobalt oxide, Intercalation reaction, XPS

CLC Number:

TM911

TrendMD:

ZHANG Fu-Ping. Studies on the Structure of LiNi_0.3Co_0.7O₂and the Behaviorof Its Lithium Battery[J]. Chem. J. Chinese Universities, 1995, 16(5): 770.

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Studies on the Structure of LiNi_0.3Co_0.7O₂and the Behaviorof Its Lithium Battery

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