共 30 条
Preparation and properties of manganese oxide/carbon composites by reduction of potassium permanganate with acetylene black
被引:67
作者:

Huang, Xingkang
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机构:
Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China

Yue, Hongjun
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机构:
Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China

Attia, Adel
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机构:
Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China

Yang, Yong
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Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China
机构:
[1] Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China
关键词:
D O I:
10.1149/1.2388741
中图分类号:
O646 [电化学、电解、磁化学];
学科分类号:
081704 ;
摘要:
Amorphous manganese oxide/carbon composites were synthesized by directly reducing potassium permanganate with acetylene black (AB) as a cheap reducing agent. A reaction is postulated and confirmed by checking the evolved CO2 gas and other species such as CO32- and HCO3- left in the mother liquor. All the composites were characterized by scanning electron micrograph, X-ray diffraction, and thermogravimetric/diffenential thermal analysis techniques. The electrochemical performances of the composites were also investigated and one composition delivered a discharge capacity as high as 231 mAh g(-1) (1.14 Li/Mn) at a current density of 40 mA g(-1) and its electrochemical performance at high rate was excellent. All results suggested that the reaction is suitable for preparing a composite cathode material and these composite materials could be developed as a potential cathode material for rechargeable Li batteries with high power. The intercrystalline water, affecting the behavior of our composites, was also discussed. (c) 2006 The Electrochemical Society.
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页码:A26 / A33
页数:8
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