Microwave assisted hydrothermal synthesis of tin niobates nanosheets with high cycle stability as lithium-ion battery anodes

作     者：Xingang Kong Jiarui Zhang Jianfeng Huang Jiayin Li Yi Qin Ting Zhao Qi Feng 

作者机构：School of Materials Science and Engineering Shaanxi University of Science and technology Department of Advanced Materials Science Faculty of Engineering Kagawa University 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2019年第30卷第3期

页      面：771-774页

核心收录：

学科分类：07[理学] 0703[理学-化学] 

基　　金：support of Project Supported by the Natural Science Foundation of China(Nos.51502163 and 51502165) Keypoint Research and Invention in Shaanxi Province of China(No.2017GY-186) the Scientific Research Foundation for the Returned Overseas Chinese Scholars,State Education Ministry 

主　　题：Tin niobates nanosheets Microwave assisted hydrothermal Anode materials Lithium ion batteries Layered structure 

摘      要：In this study, SnNb_2O_6 and Sn_2Nb_2O_7 nanosheets are synthetized via microwave assisted hydrothermal method, and innovatively employed as anode materials for lithium-ion battery. The SnNb_2O_6 electrode exhibits high reversible capacity and excellent cycling stability(498 mAh/g at 0.1 A/g after 100 cycles),which is superior to that of Sn_2Nb_2O_7 electrode(173 mAh/g at 0.1 A/g after 100 cycles). Even increasing the current density to 2.0 A/g, the SnNb_2O_6 electrode still delivers a reversible capacity up to 306 mAh/g.The rate performance of the SnNb_2O_6 electrode is also better than that of Sn_2 Nb_2O_7 electrode at different current densities from 0.1 A/g to 2.0 A/g. The enhanced electrochemical performance of SnNb_2O_6 nanosheets can be attributed to the unique layered structure, which is conducive to the diffusion of the lithium ions and the migration of electrons during discharge/charge.