{"title":"掺锌空心立方氧化锰作为锰离子电池的高性能阴极材料。","authors":"Guangming Li, Wenjie Yu, Qiqi Diao, Yutong Zhang, Fen Tang, Xinlong Luo, Liting Yan, Xuebo Zhao, Guangda Li","doi":"10.1002/cphc.202400860","DOIUrl":null,"url":null,"abstract":"<p><p>Manganese-based compounds have the characteristics of high theoretical capacity, low cost and stable performance, thus become a research hotspot for cathode materials of zinc-ion batteries (ZIBs). However, in the process of charging and discharging, it is accompanied by problems such as structural collapse and low conductivity, which resulted in severe capacity degration during cycles. In this paper, a kind of Zn<sup>2+</sup> doped MnO<sub>2</sub> hollow cube cathode material (Zn-MnO<sub>2</sub>) was prepared by self-sacrificing template method. The Zn<sup>2+</sup> doped in MnO<sub>2</sub> crystals can induce oxygen vacancies in the structure, thereby improving the structural stability ion diffusion coefficient and electrical conductivity of the material. After 100 cycles at 0.3 A g<sup>-1</sup>, the high specific capacity of 281.2 mA h g<sup>-1</sup> is still maintained. Through ex-situ XPS and ex-situ XRD tests, the mechanism of charge-discharge process was discussed. The results show that the storage mechanism of Zn-MnO<sub>2</sub> is H<sup>+</sup> and Zn<sup>2+</sup> insertion/removal and Mn<sup>3+</sup>/Mn<sup>2+</sup> two-electron reaction pathway. The total state density (TDOS) and partial state density (PDOS) of Zn-MnO<sub>2</sub> and MnO<sub>2</sub> further demonstrated that the doping of Zn2+ enhanced the electron conductivity and is beneficial to the electron transfer during the electrochemical reaction.</p>","PeriodicalId":9819,"journal":{"name":"Chemphyschem","volume":" ","pages":"e202400860"},"PeriodicalIF":2.3000,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Zn-Doped Hollow Cubic MnO<sub>2</sub> as a High-Performance Cathode Material for Zn Ion Batteries.\",\"authors\":\"Guangming Li, Wenjie Yu, Qiqi Diao, Yutong Zhang, Fen Tang, Xinlong Luo, Liting Yan, Xuebo Zhao, Guangda Li\",\"doi\":\"10.1002/cphc.202400860\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Manganese-based compounds have the characteristics of high theoretical capacity, low cost and stable performance, thus become a research hotspot for cathode materials of zinc-ion batteries (ZIBs). However, in the process of charging and discharging, it is accompanied by problems such as structural collapse and low conductivity, which resulted in severe capacity degration during cycles. In this paper, a kind of Zn<sup>2+</sup> doped MnO<sub>2</sub> hollow cube cathode material (Zn-MnO<sub>2</sub>) was prepared by self-sacrificing template method. The Zn<sup>2+</sup> doped in MnO<sub>2</sub> crystals can induce oxygen vacancies in the structure, thereby improving the structural stability ion diffusion coefficient and electrical conductivity of the material. After 100 cycles at 0.3 A g<sup>-1</sup>, the high specific capacity of 281.2 mA h g<sup>-1</sup> is still maintained. Through ex-situ XPS and ex-situ XRD tests, the mechanism of charge-discharge process was discussed. The results show that the storage mechanism of Zn-MnO<sub>2</sub> is H<sup>+</sup> and Zn<sup>2+</sup> insertion/removal and Mn<sup>3+</sup>/Mn<sup>2+</sup> two-electron reaction pathway. The total state density (TDOS) and partial state density (PDOS) of Zn-MnO<sub>2</sub> and MnO<sub>2</sub> further demonstrated that the doping of Zn2+ enhanced the electron conductivity and is beneficial to the electron transfer during the electrochemical reaction.</p>\",\"PeriodicalId\":9819,\"journal\":{\"name\":\"Chemphyschem\",\"volume\":\" \",\"pages\":\"e202400860\"},\"PeriodicalIF\":2.3000,\"publicationDate\":\"2024-10-29\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Chemphyschem\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://doi.org/10.1002/cphc.202400860\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemphyschem","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1002/cphc.202400860","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Zn-Doped Hollow Cubic MnO2 as a High-Performance Cathode Material for Zn Ion Batteries.
Manganese-based compounds have the characteristics of high theoretical capacity, low cost and stable performance, thus become a research hotspot for cathode materials of zinc-ion batteries (ZIBs). However, in the process of charging and discharging, it is accompanied by problems such as structural collapse and low conductivity, which resulted in severe capacity degration during cycles. In this paper, a kind of Zn2+ doped MnO2 hollow cube cathode material (Zn-MnO2) was prepared by self-sacrificing template method. The Zn2+ doped in MnO2 crystals can induce oxygen vacancies in the structure, thereby improving the structural stability ion diffusion coefficient and electrical conductivity of the material. After 100 cycles at 0.3 A g-1, the high specific capacity of 281.2 mA h g-1 is still maintained. Through ex-situ XPS and ex-situ XRD tests, the mechanism of charge-discharge process was discussed. The results show that the storage mechanism of Zn-MnO2 is H+ and Zn2+ insertion/removal and Mn3+/Mn2+ two-electron reaction pathway. The total state density (TDOS) and partial state density (PDOS) of Zn-MnO2 and MnO2 further demonstrated that the doping of Zn2+ enhanced the electron conductivity and is beneficial to the electron transfer during the electrochemical reaction.
期刊介绍:
ChemPhysChem is one of the leading chemistry/physics interdisciplinary journals (ISI Impact Factor 2018: 3.077) for physical chemistry and chemical physics. It is published on behalf of Chemistry Europe, an association of 16 European chemical societies.
ChemPhysChem is an international source for important primary and critical secondary information across the whole field of physical chemistry and chemical physics. It integrates this wide and flourishing field ranging from Solid State and Soft-Matter Research, Electro- and Photochemistry, Femtochemistry and Nanotechnology, Complex Systems, Single-Molecule Research, Clusters and Colloids, Catalysis and Surface Science, Biophysics and Physical Biochemistry, Atmospheric and Environmental Chemistry, and many more topics. ChemPhysChem is peer-reviewed.