1. Enhanced kinetic behaviors of LiMnFePO/C cathode material by Fe substitution and carbon coating.
- Author
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Yan, Su-Yuan, Wang, Cheng-Yang, Gu, Rong-Min, and Li, Ming-Wei
- Subjects
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CARBON foams , *CATHODES , *LITHIUM-ion batteries , *CYCLIC voltammetry , *ELECTROCHEMISTRY - Abstract
The LiMnFePO/C nanocrystallites with a uniform size (∼50 nm) are successfully prepared by employing a facile solvothermal method at 180 °C. Amphiphilic carbonaceous material (ACM) is chosen as the carbon precursor and forms a homogeneous carbon layer covering the LiMnFePO particles. The as-prepared LiMnFePO/C sample, with a high Brunauer-Emmett-Teller (BET) surface area of 69.3 m g, is used as the cathode material for lithium-ion batteries (LIBs) and delivers a reversible capacity of 158 mAh g at 0.05 C. It shows remarkable rate capability with discharge capacities of 130 mAh g at 1 C, 105 mAh g at 10 C and 99 mAh g at 30 C. Meanwhile, the material maintains 121 mAh g at 1 C after 150 cycles with 93 % capacity retention. The kinetic behaviors of LiMnFePO/C sample are investigated by high throughout cyclic voltammetry. The small particle size, partial Fe substitution, and homogeneous carbon coating make a synergetic effect on enhancing the sample's electrochemical properties. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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