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ELECTROCHEMICAL PROPERTIES OF LiMn 2 O 4 COATED WITH NANO-THICKNESS CARBONAND FLUORINE
Authors:
Masayuki Takashima a;
Susumu Yonezawa a;
Masaya Ozawa a
| Affiliation: | a Department of Materials Science & Engineering, Facultyof Engineering, Fukui University, 3-9-1 Bunkyo, Fukui 910-8507, Japan. |
DOI:
10.1080/10587250215258
First Published on:
01 January 2002
Subjects:
Chemistry;
Condensed Matter Physics;
Crystallography;
Inorganic Chemistry;
Materials Chemistry;
Organic Chemistry;
Physical Chemistry;
Formats available:
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(English)
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Abstract
Surface modification of LiMn 2 O 4 by coating with nano-thickness carbon and fluorine were carried out by an arc discharge with carbon electrode (nC-LiMn 2 O 4 , n=number of times of arc discharge for 0.1 s) and a fluorination with NF 3 at 1.3 kPa for 1 hour at 100°C (F-LiMn 2 O 4 ). Cyclic voltammograms revealed that the reversibility of the electrochemical process was improved by coating with nano-thickness carbon. The discharge capacities of nC-LiMn 2 O 4 and F-LiMn 2 O 4 were improved by 5∼10%. 120C-LiMn 2 O 4 exhibits the largest discharge capacity.
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