Synthesis of Nanocobalt Powders for an Anode Material of Lithium-Ion Batteries by Chemical Reduction and Carbon Coating

被引:2
作者
Hong, Seong-Hyeon [1 ]
Jin, Yeong-Mi [2 ]
Kim, Kyung Tae [1 ]
Ahn, Cheol-Woo [3 ]
Park, Dong-Su [3 ]
Song, Myoung Youp [4 ]
机构
[1] Korea Inst Machinery & Mat, KIMS, Powder Technol Grp, Chang Won 642831, Gyeongsangnam D, South Korea
[2] Hwa Sung Thermo Co Ltd, Pyeongtaek Si 459050, Gyeonggi Do, South Korea
[3] Korea Inst Machinery & Mat, KIMS, Funct Ceram Grp, Chang Won 642831, Gyeongsangnam D, South Korea
[4] Chonbuk Natl Univ, Res Ctr Adv Mat Dev, Engn Res Inst, Div Adv Mat Engn, Jeonju 561756, South Korea
关键词
ELECTROCHEMICAL PROPERTIES; HYDROTHERMAL SYNTHESIS; CATHODE MATERIAL; COMPOSITE; COBALT; CO; PERFORMANCE; BEHAVIOR; STORAGE;
D O I
10.1155/2014/378103
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Nanosized Co powders were prepared by a chemical reduction method with and without CTAB (cetyltrimethylammonium bromide, C19H42BrN) and carbon-coating heat treatment at 700 degrees C for 1 h, and the electrochemical properties of the prepared nanosized Co powders were examined to evaluate their suitability as an anode material of Li-ion batteries. Nanosized amorphous Co-based powders could be synthesized by a chemical reduction method in which a reducing agent is added to a Co ion-dissolved aqueous solution. When the prepared nanosized Co-based powders were subjected to carbon-coating heat treatment at 700 degrees C for 1 h, the amorphous phase was crystallized, and a Co single phase could be obtained. The Co-based powder prepared by chemical reduction with CTAB and carbon-coating heat treatment had a smaller first discharge capacity (about 557 mAh/g) than the Co-based powder prepared by chemical reduction without CTAB and carbon-coating heat treatment (about 628 mAh/g). However, the former had a better cycling performance than the latter from the third cycle. The carbon-coated layers are believed to have led to quite good cycling performances of the prepared Co-based powders from the third cycle.
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页数:8
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