Mn-based MXene with high lithium-ion storage capacity  

作　　者：Yanyan Wu Dongqing Liu Xiaonan Wang Usman Ghani Muhammad Asim Mushtaq Jinfeng Yang Huarui Sun Panagiotis Tsiakaras Xingke Cai 

机构地区：[1]School of Science and Ministry of Industry and Information Technology Key Laboratory of Micro-Nano Optoelectronic Information System,Harbin Institute of Technology Shenzhen,Shenzhen 5180552 China [2]Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China [3]Institute for Advanced Study,Shenzhen University,Shenzhen 518060,China [4]College of Mechatronics and Control Engineering,Shenzhen University,Shenzhen 518060,China [5]Laboratory of Alternative Energy Conversion Systems,Department of Mechanical Engineering,School of Engineering,University of Thessaly,Pedion Areos 38834,Greece

出　　处：《Nano Research》2024年第5期4181-4191,共11页纳米研究（英文版）

基　　金：supported by the funding from the National Natural Science Foundation of China(Nos.52003163,22105129);Guangdong Basic and Applied Basic Research Foundation(Nos.2022A1515010670,2022A1515011048);Science and Technology Innovation Commission of Shenzhen(No.20200812112006001);and Shenzhen University-Taipei University of Science and Technology Collaboration Project(Nos.2022005,2022015).X.Cai appreciates the help from the electron microscopy center at Shenzhen University for providing the aberration-corrected HAADF STEM testing services.H.Sun acknowledges the support from the Guangdong Special Support Program(No.2021TQ06C953);the Science and Technology Planning Projects of Shenzhen Municipality(Nos.JCYJ20190806142614541,GXWD20220811164433002).

摘　　要：3d-transition metal(Fe,Co,Ni,and Mn)-based MXene materials have been predicted to demonstrate exceptional electrochemical performance because of their good electrical conductivity and the presence of metallic atoms with multiple charge states.However,until now,there have been no reports on MXenes based on Fe,Co,Ni,and Mn,due to the lack of 3d-metal-layered precursors.Herein,we successfully synthesized the first 3d-transition metal-based MXenes,Mn_(2)CT_(x) by exfoliating a layered precursor derived from the anti-perovskite bulk Mn3GaC.The as-prepared Mn_(2)CT_(x) MXene nanosheets were employed as anode materials in lithium-ion batteries,which exhibited stable storage capacity of 764.7 mAh·g^(-1) at 0.5 C,placing its storage capacities at an upper-middle level compared with other reported MXene materials as well as other Mn-based anode materials.Overall,this study opens a new avenue for MXene research by synthesizing 3d-transition metal-based MXenes for electrochemical applications.

关 键 词：Mn_(3)GaC Mn_(2)CT_(x) MXenes lithium-ion battery anode materials negative fading capacity 

分 类 号：TM912[电气工程—电力电子与电力传动]