共 31 条
Nanoflaky MnO2/carbon nanotube nanocomposites as anode materials for lithium-ion batteries
被引:422
作者:

Xia, Hui
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机构:
Natl Univ Singapore, Dept Mech Engn, Singapore 117576, Singapore Natl Univ Singapore, Dept Mech Engn, Singapore 117576, Singapore

Lai, ManOn
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机构:
Natl Univ Singapore, Dept Mech Engn, Singapore 117576, Singapore Natl Univ Singapore, Dept Mech Engn, Singapore 117576, Singapore

Lu, Li
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机构:
Natl Univ Singapore, Dept Mech Engn, Singapore 117576, Singapore Natl Univ Singapore, Dept Mech Engn, Singapore 117576, Singapore
机构:
[1] Natl Univ Singapore, Dept Mech Engn, Singapore 117576, Singapore
关键词:
MANGANESE OXIDE;
CARBON NANOTUBES;
ONE-STEP;
IN-SITU;
PERFORMANCE;
COMPOSITES;
ELECTRODES;
MNO2;
NANOWIRES;
STORAGE;
D O I:
10.1039/c0jm00759e
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
Caterpillar-like nanoflaky MnO2/carbon nanotube (CNT) nanocomposites are synthesized via a facile solution method. To build a three-dimensional hierarchy architecture, highly porous interconnected MnO2 nanoflakes are uniformly coated on the surface of the CNTs. As a promising anode material for lithium-ion batteries, the nanoflaky MnO2/CNT nanocomposite electrode exhibits a large reversible capacity of 801 mA h g(-1) (similar to 1000 mA h g(-1) can be attributed to the MnO2 porous layer alone) for the first cycle without capacity fade for the first 20 cycles and with a good rate capability. The superior electrochemical performance of the MnO2/CNT nanocomposite electrode compared to the pure MnO2 electrode can be attributed to its unique hierarchy architecture, which is able to provide fast lithium ion and electron transport and to accommodate a large volume change during the conversion reactions.
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页码:6896 / 6902
页数:7
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