Journal
JOURNAL OF POWER SOURCES
Volume 94, Issue 1, Pages 68-73Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S0378-7753(00)00601-7
Keywords
lithium secondary batteries; graphite anodes; coke-coated graphites; irreversible capacity loss; Ac impedance spectroscopy
Ask authors/readers for more resources
Surface modification of graphite to reduce the irreversible capacity loss during the first charging period of graphite anodes is described. For the surface modification, artificial graphite (Lonza KS44) is dispersed in a tetrahydrofuran/acetone solution which contains coal tar pitch. The solvent is then evaporated. The loaded pitch component is converted to coke by a heat treatment at 1000 degreesC in argon atmosphere. The resulting coke-coated graphite has a smaller surface area than that of the pristine one. The reduction of surface area, which is due to the coverage of pores of <10 nm by the coke component, causes a decrease in the irreversible capacity on the first cycle. The extent of electrolyte decomposition, gas evolution and surface film growth is also less with the coke-coated graphite electrode. (C) 2001 Elsevier Science B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available