School of Chemical Biology and Materials Engineering, Jiangsu Key Laboratory for Environment Functional Materials, Suzhou University of Science and Technology, Suzhou 215009, China; Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China.
School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China.
J Colloid Interface Sci. 2018 Aug 15;524:256-262. doi: 10.1016/j.jcis.2018.03.100. Epub 2018 Mar 29.
In this manuscript, the graphene-encapsulated MnMoO hollow spheres (MnMoO@G) synthesized by an effective strategy were reported. Benefiting from the intriguing hybrid architecture of hollow structure and conductive graphene network, the MnMoO@G composite displays superior electrochemical performance with high specific capacity of 1142 mA h g, high reversible cycling stability of 921 mA h g at a current density of 100 mA g after 70 cycles, and stable rate performance (around 513 mA h g at a current density of 4.0 A g). The remarkable battery performance can be attributed to the rational design of the architecture, which not only ensures the fast transport of electrons and lithium ions within the electrode material, but also effectively relax the stress induced by the insertion/extraction of lithium ions. This facile synthetic method can extend to other transition metal oxides with large volume excursions and poor electric conductivity and promotes the development of transition metal oxides as high-performance LIB anode material.
在本文中，报道了一种通过有效策略合成的石墨烯封装的 MnMoO 空心球（MnMoO@G）。得益于空心结构和导电石墨烯网络的引人入胜的混合结构，MnMoO@G 复合材料表现出优异的电化学性能，具有 1142 mA h g 的高比容量、在 100 mA g 的电流密度下经过 70 次循环后具有 921 mA h g 的高可逆循环稳定性，以及稳定的倍率性能（在 4.0 A g 的电流密度下约为 513 mA h g）。卓越的电池性能可归因于结构的合理设计，这不仅确保了电极材料内电子和锂离子的快速传输，而且还有效缓解了锂离子插入/提取引起的应力。这种简便的合成方法可以扩展到其他具有大体积变化和较差导电性的过渡金属氧化物，并促进过渡金属氧化物作为高性能 LIB 阳极材料的发展。
