Journal of Physics and Chemistry of Solids ( IF 4 ) Pub Date : 2021-01-30 , DOI: 10.1016/j.jpcs.2021.109987 Fanjun Kong , Jihui Zheng , Jiyun Chen , Xingjiang Li , Shi Tao , Bin Qian
Transition metal selenides have been extensively investigated in the field of energy storage and conversion, because of their unique physical and chemical properties. However, the large structural and volume change may lead to their poor electrochemical performance. In this work, the carbon coating design can effectively solve the above issues. The effect of carbon coating content on the electrochemical performance of zinc selenide is further studied. When composite has optimal ratio of ZnSe and carbon, it can present the superior cycling stability. The carbon modification not only provides three-dimensional conductive network for ZnSe particles, but also mitigates the inner stress and volume variation. More importantly, the active materials can be separated from the electrolyte by carbon coating, which can avoid side effects. This strategy might provide an effective route to address the issues of metal selenides.
中文翻译:
碳涂层改善了具有稳定电化学反应界面的ZnSe颗粒的锂离子存储性能
过渡金属硒化物由于其独特的物理和化学性质,已在能量存储和转换领域进行了广泛的研究。但是,较大的结构和体积变化可能导致其不良的电化学性能。在这项工作中,碳涂层设计可以有效地解决上述问题。进一步研究了碳涂层含量对硒化锌电化学性能的影响。当复合材料具有最佳的ZnSe和碳比例时,它可以表现出优异的循环稳定性。碳改性不仅为ZnSe颗粒提供三维导电网络,而且减轻了内部应力和体积变化。更重要的是,可以通过碳涂层将活性材料与电解质分离,这可以避免副作用。