Surface structure and electrochemical characteristics of natural graphite fluorinated by ClF3

被引：45
作者：
Matsumoto, Kazuhiko
Li, Jianling
Ohzawa, Yoshimi
Nakajima, Tsuyoshi [1 ]
Mazej, Zoran
Zemva, Boris
机构：
[1] Aichi Inst Technol, Dept Appl Chem, Toyota 4700392, Japan
[2] Jozef Stefan Inst, Ljubljana 1000, Slovenia
来源：
JOURNAL OF FLUORINE CHEMISTRY | 2006年 / 127卷 / 10期
关键词：
fluorination; surface modification; lithium ion battery; graphite anode; ClF3;
D O I：
10.1016/j.jfluchem.2006.06.012
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Natural graphite samples with average particle sizes of 5, 10 and 15 mu m (NG5 mu m, NG10 mu m and NG15 mu m, respectively) were fluorinated by ClF3 (3 x 10(4) Pa) at 200 and 300 degrees C for 2 min. X-ray photoelectron spectra of surface-fluorinated samples showed that surface fluorine concentration increased with increase in the particle size of graphite and reaction temperature. Small amounts of chlorine were also detected in all the fluorinated samples. Raman spectra of original and surface-fluorinated samples indicated that the surface disordering was increased for NG10 mu m and NG15 mu m. Surface areas were decreased by the fluorination for NG5 mu m and NG10 mu m but unchanged for NG15 mu m. The mesopores with diameter of 1.5-2 nm increased while those of 2-3 nm decreased for all the samples. First coulombic efficiencies for NGIO mu m and NG15 mu m were highly increased by surface fluorination in 1 mol/dm(3) LiClO4-EC/DEC/PC (EC: ethylene carbonate, DEC: diethyl carbonate, PC: propylene carbonate) solution. (c) 2006 Elsevier B.V. All rights reserved.
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页码：1383 / 1389
页数：7
相关论文
共 29 条
[1]  
ACHIBA T, 2005, 32 ANN M CARB SOC JA, P152
[2]   Preparation of surface-rnodified carbonaceous thin-film electrodes by NF3 plasma and their electrochemical properties [J].
Fukutsuka, T ;
Hasegawa, S ;
Matsuo, Y ;
Sugie, Y ;
Abe, T ;
Ogumi, Z .
JOURNAL OF POWER SOURCES, 2005, 146 (1-2) :151-155
[3]   THERMAL DATA, VAPOR PRESSURE AND ENTROPY OF CHLORINE TRIFLUORIDE [J].
GRISARD, JW ;
BERNHARDT, HA ;
OLIVER, GD .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1951, 73 (12) :5725-5727
[4]   Electrochemical characteristics and structures of surface-fluorinated graphites with different particle sizes for lithium ion secondary batteries [J].
Gupta, V ;
Nakajima, T ;
Ohzawa, Y ;
Iwata, H .
JOURNAL OF FLUORINE CHEMISTRY, 2001, 112 (02) :233-240
[5]   Improvement on the electrochemical characteristics of graphite anodes by coating of the pyrolytic carbon using tumbling chemical vapor deposition [J].
Han, YS ;
Lee, JY .
ELECTROCHIMICA ACTA, 2003, 48 (08) :1073-1079
[6]  
Hara M., 1994, TANSO, V165, P261
[7]   Robust image mosaicing of soccer videos using self-calibration and line tracking [J].
Kim, H ;
Hong, KS .
PATTERN ANALYSIS AND APPLICATIONS, 2001, 4 (01) :9-19
[8]   Fluorine intercalation in carbon alloy CxN [J].
Koh, M ;
Yumoto, H ;
Higashi, H ;
Nakajima, T .
JOURNAL OF FLUORINE CHEMISTRY, 1999, 97 (1-2) :239-246
[9]   High-rate-capable lithium-ion battery based on surface-modified natural graphite anode and substituted spinel cathode for hybrid electric vehicles [J].
Kottegoda, IRM ;
Kadoma, Y ;
Ikuta, H ;
Uchimoto, Y ;
Wakihara, M .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2005, 152 (08) :A1595-A1599
[10]   Enhancement of rate capability in graphite anode by surface modification with zirconia [J].
Kottegoda, IRM ;
Kadoma, Y ;
Ikuta, H ;
Uchimoto, Y ;
Wakihara, M .
ELECTROCHEMICAL AND SOLID STATE LETTERS, 2002, 5 (12) :A275-A278
123