Hostname: page-component-7c8c6479df-94d59 Total loading time: 0 Render date: 2024-03-29T07:45:31.423Z Has data issue: false hasContentIssue false

Effect of HF in LiPF6 Based Electrolytes on the Properties of Surface Passivation Films Formed on Graphite Electrodes in Li Secondary Batteries

Published online by Cambridge University Press:  10 February 2011

T. Sato
Affiliation:
Tsukuba Research Center, Mitsubishi Chemical Corporation, 8–3–1, Chuo, Ami, Ibaraki, Japan, 3709954@cc.m-kagaku.co.jp
M. Deschamps
Affiliation:
Tsukuba Research Center, Mitsubishi Chemical Corporation, 8–3–1, Chuo, Ami, Ibaraki, Japan, 3709954@cc.m-kagaku.co.jp
H. Suzuki
Affiliation:
Tsukuba Research Center, Mitsubishi Chemical Corporation, 8–3–1, Chuo, Ami, Ibaraki, Japan, 3709954@cc.m-kagaku.co.jp
H. Ota
Affiliation:
Tsukuba Research Center, Mitsubishi Chemical Corporation, 8–3–1, Chuo, Ami, Ibaraki, Japan, 3709954@cc.m-kagaku.co.jp
H. Asahina
Affiliation:
Tsukuba Research Center, Mitsubishi Chemical Corporation, 8–3–1, Chuo, Ami, Ibaraki, Japan, 3709954@cc.m-kagaku.co.jp
S. Mori
Affiliation:
Tsukuba Research Center, Mitsubishi Chemical Corporation, 8–3–1, Chuo, Ami, Ibaraki, Japan, 3709954@cc.m-kagaku.co.jp
Get access

Abstract

The effect of hydrofluoric acid (HF) concentration in conventional LiPF6/EC+DEC electrolyte on the properties of solid electrolyte interphase (SEI) films formed on synthetic graphite electrode and the electrochemical performance were studied using x-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), elemental analysis and electrochemical measurement. The morphology and composition of SEI are affected by a small amount of HF in the electrolyte. Higher F content in the SEI was observed when high HF electrolyte were used, although the irreversible capacities used for formation of SEI were nearly the same value. The cycleability of the synthetic graphite electrode was greatly improved when surface film contains larger amount of LiF.

Type
Research Article
Copyright
Copyright © Materials Research Society 1998

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Aurbach, D., Ein-Eli, Y., Markovsky, B., Zaban, A., Luski, S., Carmeli, Y. and Yamin, H., J. Electrochem. Soc., 142, p. 2882 (1995)Google Scholar
2. Mori, S., Asahina, H., Suzuki, H., Yonei, A. and Yasukawa, E., Ext. Abs. 8th Int. Meeting on Lithium Batteries, p. 40 (1996)Google Scholar
3. Aurbach, D, Markovsky, B., Shechter, A., Ein-Eli, Y. and Cohem, H., J. Electrochem. Soc., 143, p. 3809(1996)10.1149/1.1837300Google Scholar
4. Chusid, O.Y., Ein-Eli, Y., Aurbach, D., Babei, M. and Carmeli, Y., J. Power Sources, 43–44, p. 47 (1993)Google Scholar
5. Kanamura, K., Shiraishi, S. and Takehara, Z., J. Electrochem. Soc., 143, p. 2187 (1996)Google Scholar