Pan Yunmei, Zhang Jiajia, Lu Hongbin
State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Collaborative Innovation Center of Polymers and Polymer Composites, Fudan University, 220 Handan Road, Shanghai, 200433, P.R. China.
Shanghai Xiyin New Materials Corporation, 135 Guowei Road, Shanghai, 200438, P.R. China.
Chemistry. 2017 Jul 21;23(41):9937-9945. doi: 10.1002/chem.201701691. Epub 2017 Jun 29.
As an electrode material for lithium-ion batteries (LIBs), MoS has attracted much attention because of its high capacity and low cost. However, the rational design of a novel electrode structure with a high capacity, fast charge/discharge rate, and long cycling lifetime remains a great challenge. Herein, a environmentally friendly etching strategy is reported for the construction of monodisperse, inner void-controlled yolk-shell MoS @carbon microspheres. The resulting anode reveals an initial discharge capacity up to 1813 mAh g , a high reversible capacity (1016 mAh g ), excellent cycling stability (200 cycles), and superior rate performance. Such microspheres consist of nanosized MoS yolks (≈280 nm), porous carbon shells (≈25 nm) and well-controlled internal voids in between, opening a new pathway for the optimization of the electrochemical properties of MoS -based anodes without sacrificing their capacity. In addition, this etching strategy offers a new method for the development of functional, hollow MoS -based composites.
作为锂离子电池（LIBs）的电极材料，二硫化钼（MoS）因其高容量和低成本而备受关注。然而，合理设计一种具有高容量、快速充放电速率和长循环寿命的新型电极结构仍然是一个巨大的挑战。在此，报道了一种环境友好的蚀刻策略，用于构建单分散、内部孔隙可控的蛋黄壳结构MoS@碳微球。所得阳极展现出高达1813 mAh g的初始放电容量、高可逆容量（1016 mAh g）、出色的循环稳定性（200次循环）和优异的倍率性能。这种微球由纳米尺寸的MoS蛋黄（≈280 nm）、多孔碳壳（≈25 nm）以及两者之间可控的内部孔隙组成，为在不牺牲容量的情况下优化基于MoS的阳极的电化学性能开辟了一条新途径。此外，这种蚀刻策略为开发功能性、空心的基于MoS的复合材料提供了一种新方法。
