期刊
NANOSCALE HORIZONS
卷 1, 期 6, 页码 496-501出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6nh00150e
关键词
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资金
- National Natural Science Foundation of China [51602048]
- Science and Technology Program of Jilin Province [20140101087JC, 20150520027JH]
- Singapore MOE AcRF [RG2/13, RG113/15]
In this communication, in order to develop superior electrode materials for advanced energy storage devices, a new strategy is proposed and then verified by the (Si@MnO)@C/RGO anode material for lithium ion batteries. The core idea of this strategy is the use of a positive cycling trend (gradually increasing Li-storage capacities of the MnO-based constituent during cycling) to compensate the negative one (gradually decreasing capacities of the Si anode) to achieve ultralong cycling stability. As demonstrated in both half and full cells, the as-prepared (Si@MnO)@C/RGO nanocomposite exhibits superior Li-storage properties in terms of ultralong cycling stability (no obvious increase or decrease of capacity when cycled at 3 A g(-1) after 1500 cycles) and excellent high-rate capabilities (delivering a capacity of ca. 540 mA h g(-1) at a high current density of 8 A g(-1)) as well as a good full-cell performance. In addition, the structure of the electrodes is stable after 200 cycles. Such a strategy provides a new idea to develop superior electrode materials for next-generation energy storage devices with ultralong cycling stabilities.
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