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Issue 10, 2011
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Carbon-coated nano-sized Li4Ti5O12 nanoporous micro-sphere as anode material for high-rate lithium-ion batteries

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Abstract

In this study, we report a facile process for preparing a carbon-coated nanosized Li4Ti5O12 nanoporous micro-sphere (CN-LTO-NMS) by a carbon pre-coating process combined with the spray drying method. The obtained material consists of a micron-size secondary sphere (10–20 μm) accumulated by carbon-coated nanosized primary particles (∼200 nm). The nanosized primary particles and nano-thickness carbon layer uniformly coated over the particles as well as the interconnected nanopores greatly improve its rate capability. As a consequence, the resulting sample delivers a reversible capacity of 160 mAhg−1 at 0.2 C, and shows remarkable rate capability by maintaining 79% of the capacity at 20 C (vs. 0.2 C), as well as excellent cycling stability with a capacity retention of 95% after 1000 cycles at 1 C rate (vs. 0.2 C).

Graphical abstract: Carbon-coated nano-sized Li4Ti5O12 nanoporous micro-sphere as anode material for high-rate lithium-ion batteries

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Publication details

The article was received on 09 May 2011, accepted on 14 Jun 2011 and first published on 08 Aug 2011


Article type: Paper
DOI: 10.1039/C1EE01680F
Citation: Energy Environ. Sci., 2011,4, 4016-4022
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    Carbon-coated nano-sized Li4Ti5O12 nanoporous micro-sphere as anode material for high-rate lithium-ion batteries

    G. Zhu, H. Liu, J. Zhuang, C. Wang, Y. Wang and Y. Xia, Energy Environ. Sci., 2011, 4, 4016
    DOI: 10.1039/C1EE01680F

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