Defect-engineered Mn_(3)O_(4)/CNTs composites enhancing reaction kinetics for zinc-ions storage performance

作     者：Xiuli Guo Hao Sun Chunguang Li Siqi Zhang Zhenhua Li Xiangyan Hou Xiaobo Chen Jingyao Liu Zhan Shi Shouhua Feng Xiuli Guo;Hao Sun;Chunguang Li;Siqi Zhang;Zhenhua Li;Xiangyan Hou;Xiaobo Chen;Jingyao Liu;Zhan Shi;Shouhua Feng

作者机构：State Key Laboratory of Inorganic Synthesis and Preparative ChemistryCollege of ChemistryJilin UniversityChangchun 130012JilinChina Laboratory of Theoretical and Computational ChemistryInstitute of Theoretical ChemistryCollege of ChemistryJilin UniversityChangchun 130023JilinChina School of EngineeringRMIT UniversityCarltonVIC 3053Australia 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2022年第31卷第5期

页      面：538-547页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：financially supported by the National Natural Science Foundation of China (21771084, 21771077, 21621001) the Foundation of Science and Technology Development of Jilin Province,China (20200801004GH) the 111 Project (B17020) financial support by the program for JLU Science and Technology Innovative Research Team (JLUSTIRT)。 

主　　题：Manganese oxide Manganese defects High rate Long cycle life Zinc ion batteries 

摘      要：The designing of reasonable nanocomposite materials and proper introduction of defect engineering are of great significance for the improvement of the poor electronic conductivity and slow reaction kinetics of manganese-based compounds. Herein, we report manganese-deficient Mn_(3)O_(4) nanoparticles which grow in-situ on highly conductive carbon nanotubes(CNTs)(denoted as DMOC) as an advanced cathode material for aqueous rechargeable zinc-ion batteries(RAZIBs). According to experimental and calculation results, the DMOC cathode integrates the advantages of enriched Mn defects and small particle size. These features not only enhance electronic conductivity but also create more active site and contribute to fast reaction kinetics. Moreover, the structure of DMOC is maintained during the charging and discharging process, thus benefiting for excellent cycle stability. As a result, the DMOC electrode delivers a high specific capacity of 420.6 m A h g^(-1) at 0.1 A g^(-1) and an excellent cycle life of 2800 cycles at 2.0 A g^(-1) with a high-capacity retention of 84.1%. In addition, the soft-packaged battery assembled with DMOC cathode exhibits long cycle life and high energy density of 146.3 Wh kg^(-1) at 1.0 A g^(-1) . The results are beneficial for the development of Zn/Mn_(3)O_(4) battery for practical energy storage.