The dependence of natural graphite anode performance on electrode density

JOURNAL OF POWER SOURCES

卷:130

Article; Proceedings Paper

Shim, JP ; Striebel, KA

关键词: lithium ion battery;    intercalation;    irreversible capacity loss;    natural graphite;    electrode density;   

DOI  :  10.1016/j.jpowsour.2003.12.015

来源: Elsevier

【 摘 要 】

The effect of electrode density for lithium intercalation and irreversible capacity loss on the natural graphite anode in lithium ion batteries was studied by electrochemical methods. Both the first-cycle reversible and irreversible capacities of the natural graphite anode decreased with an increase in the anode density though compression. The reduction in reversible capacity was attributed to a reduction in the chemical diffusion coefficient for lithium through partially agglomerated particles with a larger stress. For the natural graphite in this study the potentials for Li (de)insertion shifted between the first and second formation cycles and the extent of this shift was dependent on electrode density. The relation between this peak shift and the irreversible capacity loss is probably due to the decrease in graphite surface area with compression. (C) 2003 Elsevier B.V. All rights reserved.

【 授权许可】

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