文献类型：期刊文献

英文题名：Mn-MOF-derived litchi-like MnO/MnS@C heterojunction cathode material for high-performance aqueous zinc-ion batteries

作者：Han, Mingyu[1];Jia, Yiying[1];Wang, Ruoyu[1];Wang, Wenqiang[1];Sun, Ming[1,2];Wang, Gengchao[1]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China;[2]Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China

年份：2025

卷号：131

外文期刊名：JOURNAL OF ENERGY STORAGE

收录：;EI(收录号：20252718711435);WOS:【SCI-EXPANDED(收录号:WOS:001527621000008)】；

基金：We greatly appreciate the financial supports of National Natural Science Foundation of China (22109045, 22478120) .

语种：英文

外文关键词：Aqueous zinc-ion batteries; Manganese-based materials; Sulfur vacancy; Heterojunction; Energy storage mechanism

摘要：Manganese-based materials are commonly employed as cathodes in rechargeable aqueous zinc-ion batteries (AZIBs) due to their high theoretical capacity, minimal toxicity and low cost. However, poor conductivity, sluggish charge diffusion kinetics, and unfavorable lattice distortion caused by Jahn-Teller effects are still hindering their practical application. Herein, a litchi-like MnO/MnS heterojunction composite cathode material (MnO/MnS@C) was prepared through carbonization-sulfidation derived from spherical manganese-based metal-organic framework (Mn-MOF). The litchi-like morphology of MnO/MnS originates from hydrothermal sulfidation etching, which facilitates the formation of numerous electrochemically active heterointerfaces. Benefiting from the synergistic effects of built-in electric fields in heterojunctions and abundant ionic defects, the MnO/ MnS@C demonstrates significantly improved conductivity and charge transfer kinetics. Furthermore, the conformal carbon layer ensures the structural stability of the MnO/MnS@C heterojunction. As a result, the as-prepared MnO/MnS@C cathode for AZIBs delivers a specific capacity of 238 mAh g-1 at 0.3 A g-1, with 175 mAh g-1 at 2.0 A g-1, and the capacity retention rate is 82.7 % after 4000 cycles. Ex-situ characterization reveals the charge storage mechanism of MnO/MnS@C, providing valuable insights for developing high-performance zinc-ion battery cathode materials.