Zou Zhengguang, Yu Zhiqi, Chen Chi, Wang Qian, Zhu Kai, Ye Ke, Wang Guiling, Cao Dianxue, Yan Jun
College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China.
Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, and Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences, Xiamen 361021, China.
ACS Nano. 2023 Jul 25;17(14):13769-13783. doi: 10.1021/acsnano.3c03381. Epub 2023 Jul 10.
Bismuth selenide holds great promise as a kind of conversion-alloying-type anode material for alkali metal ion storage because of its layered structure with large interlayer spacing and high theoretical specific capacity. Nonetheless, its commercial development has been significantly hammered by the poor kinetics, severe pulverization, and polyselenide shuttle during the charge/discharge process. Herein, Sb-substitution and carbon encapsulation strategies are simultaneously employed to synthesize SbBiSe nanoparticles decorated on TiCT MXene with encapsulation of N-doped carbon (SbBiSe/MX⊂NC) as anodes for alkali metal ion storage. The superb electrochemical performances could be assigned to the cationic displacement of Sb that effectively inhibits the shuttling effect of soluble polyselenides and the confinement engineering that alleviates the volume change during the sodiation/desodiation process. When used as anodes for sodium- and lithium-ion batteries, the SbBiSe/MX⊂NC composite exhibits superior electrochemical performances. This work offers valuable guidance to suppress the shuttling of polyselenides/polysulfides in high-performance alkali metal ion batteries with conversion/alloying-type transition metal sulfide/selenide anode materials.
硒化铋作为一种用于碱金属离子存储的转化合金型负极材料具有很大的潜力，这是因为其具有层间距大且理论比容量高的层状结构。尽管如此，其在商业开发过程中受到了充放电过程中动力学性能差、严重粉化以及多硒化物穿梭效应的显著阻碍。在此，同时采用锑取代和碳包覆策略，合成了负载于TiCT MXene上并被氮掺杂碳包覆的SbBiSe纳米颗粒（SbBiSe/MX⊂NC）作为碱金属离子存储的负极。优异的电化学性能可归因于锑的阳离子取代效应有效地抑制了可溶性多硒化物的穿梭效应，以及限域工程缓解了在钠化/脱钠过程中的体积变化。当用作钠离子和锂离子电池的负极时，SbBiSe/MX⊂NC复合材料表现出优异的电化学性能。这项工作为抑制高性能碱金属离子电池中多硒化物/多硫化物在具有转化/合金型过渡金属硫化物/硒化物负极材料中的穿梭提供了有价值的指导。
