{"title":"原位掺杂 Zn2+ 修饰 MnO 分子结构,实现超高容量锌离子水电池","authors":"","doi":"10.1016/j.est.2024.114019","DOIUrl":null,"url":null,"abstract":"<div><div>Faintly acidic Zn-MnO<sub>X</sub> batteries has been ultra-discussed as a focal point of the scientific community due to the rich natural resources and advanced industrial lines. However, its variable valence state and complex crystal structure can lead to the collapse of crystal phase structure and Mn dissolution in electrolyte. Herein, a Zn<sup>2+</sup> doped Mn<sub>3</sub>O<sub>4</sub> on carbon nanosheet arrays (Zn-Mn<sub>3</sub>O<sub>4</sub>/CNA) has been developed by calcination and electrochemical deposition. The Zn<sup>2+</sup> insertion can make the structure will not collapse during the transition from spinel structure (Mn<sub>3</sub>O<sub>4</sub>) to layered structure (MnO<sub>2</sub>). The carbon nanosheet arrays can improve the electric conductivity of electrochemical interface and easily in situ electrochemical deposition Mn<sub>3</sub>O<sub>4</sub>. It is worth noting that the Zn-Mn<sub>3</sub>O<sub>4</sub>/CNA cathode shows high-capacity of 316 mAh g<sup>−1</sup> and energy density of 420.8 Wh kg<sup>−1</sup> at 0.1 A g<sup>−1</sup>. Besides, its capacity retention can reach 76.3 % after 600 cycles. This work proves that cationic doping can effectively suppress the Jahn-Teller effect and promote zinc ion diffusion during discharge.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":null,"pages":null},"PeriodicalIF":8.9000,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"In-situ doped Zn2+ modified MnO molecular structure to achieve the ultrahigh capacity aqueous zinc ion batteries\",\"authors\":\"\",\"doi\":\"10.1016/j.est.2024.114019\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Faintly acidic Zn-MnO<sub>X</sub> batteries has been ultra-discussed as a focal point of the scientific community due to the rich natural resources and advanced industrial lines. However, its variable valence state and complex crystal structure can lead to the collapse of crystal phase structure and Mn dissolution in electrolyte. Herein, a Zn<sup>2+</sup> doped Mn<sub>3</sub>O<sub>4</sub> on carbon nanosheet arrays (Zn-Mn<sub>3</sub>O<sub>4</sub>/CNA) has been developed by calcination and electrochemical deposition. The Zn<sup>2+</sup> insertion can make the structure will not collapse during the transition from spinel structure (Mn<sub>3</sub>O<sub>4</sub>) to layered structure (MnO<sub>2</sub>). The carbon nanosheet arrays can improve the electric conductivity of electrochemical interface and easily in situ electrochemical deposition Mn<sub>3</sub>O<sub>4</sub>. It is worth noting that the Zn-Mn<sub>3</sub>O<sub>4</sub>/CNA cathode shows high-capacity of 316 mAh g<sup>−1</sup> and energy density of 420.8 Wh kg<sup>−1</sup> at 0.1 A g<sup>−1</sup>. Besides, its capacity retention can reach 76.3 % after 600 cycles. This work proves that cationic doping can effectively suppress the Jahn-Teller effect and promote zinc ion diffusion during discharge.</div></div>\",\"PeriodicalId\":15942,\"journal\":{\"name\":\"Journal of energy storage\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":8.9000,\"publicationDate\":\"2024-10-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of energy storage\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2352152X24036053\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENERGY & FUELS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of energy storage","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2352152X24036053","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
In-situ doped Zn2+ modified MnO molecular structure to achieve the ultrahigh capacity aqueous zinc ion batteries
Faintly acidic Zn-MnOX batteries has been ultra-discussed as a focal point of the scientific community due to the rich natural resources and advanced industrial lines. However, its variable valence state and complex crystal structure can lead to the collapse of crystal phase structure and Mn dissolution in electrolyte. Herein, a Zn2+ doped Mn3O4 on carbon nanosheet arrays (Zn-Mn3O4/CNA) has been developed by calcination and electrochemical deposition. The Zn2+ insertion can make the structure will not collapse during the transition from spinel structure (Mn3O4) to layered structure (MnO2). The carbon nanosheet arrays can improve the electric conductivity of electrochemical interface and easily in situ electrochemical deposition Mn3O4. It is worth noting that the Zn-Mn3O4/CNA cathode shows high-capacity of 316 mAh g−1 and energy density of 420.8 Wh kg−1 at 0.1 A g−1. Besides, its capacity retention can reach 76.3 % after 600 cycles. This work proves that cationic doping can effectively suppress the Jahn-Teller effect and promote zinc ion diffusion during discharge.
期刊介绍:
Journal of energy storage focusses on all aspects of energy storage, in particular systems integration, electric grid integration, modelling and analysis, novel energy storage technologies, sizing and management strategies, business models for operation of storage systems and energy storage developments worldwide.