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Issue 30, 2012
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Facile synthesis of mesoporous 0.4Li2MnO3·0.6LiNi2/3Mn1/3O2 foams with superior performance for lithium-ion batteries

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Abstract

Mesoporous 0.4Li2MnO3·0.6LiNi2/3Mn1/3O2 foams with a pore diameter of ca. 3 nm have been fabricated by a gel-combustion method. The sintering temperature is optimized to as low as 600 °C by considering the balance of crystallization and particle size. The as-obtained mesoporous 0.4Li2MnO3·0.6LiNi2/3Mn1/3O2 foams show excellent rate capability and cyclability. At a current density of 15 mA g−1, the specific discharge capacity is 291 mA h g−1 for the first cycle and the capacity retention is 92.3% over 100 cycles. Even at 200 mA g−1, the capacity is as high as 208 mA h g−1. The improved rate capability and cyclability can be ascribed to the mesoporous structure. The mesoporous structure has a large contact surface between the electrode and electrolyte, which facilitates the Li+-ion diffusion and enhances the ability of accommodation for continuous structural transition during charge and discharge cycling.

Graphical abstract: Facile synthesis of mesoporous 0.4Li2MnO3·0.6LiNi2/3Mn1/3O2 foams with superior performance for lithium-ion batteries

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Article information


Submitted
08 Apr 2012
Accepted
24 May 2012
First published
25 May 2012

J. Mater. Chem., 2012,22, 14964-14969
Article type
Paper

Facile synthesis of mesoporous 0.4Li2MnO3·0.6LiNi2/3Mn1/3O2 foams with superior performance for lithium-ion batteries

Y. Jiang, Z. Yang, W. Luo, X. Hu, W. Zhang and Y. Huang, J. Mater. Chem., 2012, 22, 14964
DOI: 10.1039/C2JM32198J

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