Electrochemical behavior of graphite highly fluorinated by high oxidation state complex fluorides and elemental fluorine

被引：93

作者：

Nakajima, T ^{[1
]}

Koh, M

Gupta, V

Zemva, B

Lutar, K

机构：

[1] Kyoto Univ, Dept Polymer Chem, Grad Sch Engn, Sakyo Ku, Kyoto 6068501, Japan

[2] Jozef Stefan Inst, Ljubljana 1000, Slovenia

来源：

ELECTROCHIMICA ACTA | 2000年 / 45卷 / 10期

基金：

日本学术振兴会;

关键词：

fluorine intercalation; graphite; C-F bond; primary lithium battery; electrochemical discharge;

D O I：

10.1016/S0013-4686(99)00389-8

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Highly fluorinated graphites have been synthesized by using elemental fluorine under pressure and high oxidation state complex fluoride, K2NiF6 or KAgF4 in anhydrous hydrogen fluoride. Their electrochemical discharge as a cathode of primary lithium battery has been investigated in organic electrolyte solution. Main products were stage 1 compounds or the stage 1 involving stage 2 and 3 phases as minor components with approximate compositions of C1.6F. X-ray photoelectron spectra indicated the existence of nearly semi-ionic C-F bonds. Electrochemical studies demonstrated that the CxF samples prepared using KAgF4 and elemental fluorine exhibited high and flat discharge potentials of 3.2 V versus Li/Li+ and discharge capacities of similar to 500 mA h g(-1) at cut-off potential 1.5 V. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：1655 / 1661

页数：7

共 22 条

[1]

Fukuda M., 1974, National Technical Report, V20, P35

[2] THE PREPARATION OF PLANAR-SHEET GRAPHITE FLUORIDES CXF WITH X-LESS-THAN-2 [J].

HAGIWARA, R ;

LERNER, M ;

BARTLETT, N .

JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1989, (09) :573-574

[3] A LITHIUM C2F PRIMARY BATTERY [J].

HAGIWARA, R ;

LERNER, M ;

BARTLETT, N ;

NAKAJIMA, T .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1988, 135 (09) :2393-2394

[4] Fluorine reactivity with graphite and fullerenes. Fluoride derivatives and some practical electrochemical applications [J].

Hamwi, A .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1996, 57 (6-8) :677-688

[5] GRAPHITE FLUORIDES PREPARED AT ROOM-TEMPERATURE .2. A VERY GOOD ELECTROCHEMICAL-BEHAVIOR AS CATHODE MATERIAL IN LITHIUM NON-AQUEOUS ELECTROLYTE CELL [J].

HAMWI, A ;

DAOUD, M ;

COUSSEINS, JC .

SYNTHETIC METALS, 1989, 30 (01) :23-31

[6] Low-temperature carbon fluoride for high power density lithium primary batteries [J].

Hany, P ;

Yazami, R ;

Hamwi, A .

JOURNAL OF POWER SOURCES, 1997, 68 (02) :708-710

[7]

JESIH A, 1986, ACTA CHIM SLOV, V33, P25

[8] CHEMICAL COMPOSITION AND CRYSTAL-STRUCTURE OF GRAPHITE FLUORIDE [J].

KITA, Y ;

WATANABE, N ;

FUJII, Y .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1979, 101 (14) :3832-3841

[9] SYNTHESIS OF PLANAR-SHEET GRAPHITE FLUORIDES USING FLUOROMETALLATE SALTS OF TRANSITION-METALS IN ANHYDROUS HYDROGEN-FLUORIDE [J].

LEMMON, JP ;

LERNER, MM .

CARBON, 1993, 31 (03) :437-443

[10]

LUTAR K, 1991, EUR J SOL STATE INOR, V28, P1335

← 1 2 3 →