层状复合物Ti_(3)C_(2) MXene/NaTiO2用作高性能钠离子电池负极材料的研究  

Layered Ti_(3)C_(2) MXene/NaTiO_(2) Composites as High-performance Anode Material for Sodium Ion Battery

作　　者：吴黎铭 赵航[1] 李倩 刘艳改[1] 慕楠 米瑞宇[1] WU Liming;ZHAO Hang;LI Qian;LIU Yan gai;MU Nan;MI Ruiyu(Beijing Key Laboratory of Non-metallic Materials and Solid Waste Resource Materials Utilization,School of Materials Science and Engineering,China University of Geosciences(Beijing),Beijing 100083,China)

机构地区：[1]中国地质大学(北京)材料科学与工程学院非金属材料和固废资源材料利用北京市重点实验室,北京100083

出　　处：《陶瓷学报》2021年第6期990-996,共7页Journal of Ceramics

基　　金：国家自然科学基金(51772278,51802004);中央高校基础研究基金(2652019130)。

摘　　要：以MAX相Ti_(3)AlC_(2)为前驱体,选择性刻蚀后制得Ti_(3)C_(2) MXene基体,通过Ti_(3)C_(2) MXene基体与Na_(2)S·9H_(2)O共热,成功在Ti_(3)C_(2) MXene表面原位生长出NaTiO_(2)纳米片。制得的片层状复合材料Ti_(3)C_(2) MXene/NaTiO_(2)在结构上继承了Ti_(3)C_(2)MXene的结构优势,同时,材料具备NaTiO_(2)的成分优势,有利于离子的传输和扩散。Ti_(3)C_(2) MXene/NaTiO_(2)复合材料在电化学性能方面表现优异:在200 mA·g^(-1)的电流密度下循环250次,放电比容量能达到253.60 mAh·g^(-1);在2000 mA·g^(-1)的电流密度下,放电比容量仍有144.70 mAh·g^(-1)。Ti_(3)C_(2) MXene matrix was prepared by selective etching with MAX Ti_(3)AlC_(2) as precursor.NaTiO_(2) nanosheets were grown on surface of the Ti_(3)C_(2) MXene nanosheets by co-heating Ti_(3)C_(2) with Na_(2)S·9H_(2)O.The layered Ti_(3)C_(2) MXene/NaTiO_(2) composite inherited the structural advantages of Ti_(3)C_(2) and the componential superiorities of NaTiO_(2),which is conducive to ion transmission and diffusion.The Ti_(3)C_(2) MXene/NaTiO_(2) composites show excellent electrochemical properties,with a discharge specific capacity of 253.60 mAh·g^(-1) after 250 cycles at a current density of 200 mA·g^(-1),which is retained at 144.70 mAh·g^(-1) at the current density of 2000 mA·g^(-1).

关 键 词：钠离子电池 Ti_(3)C_(2)MXene/NaTiO_(2) 片层状结构 电化学性能 

分 类 号：TQ174.75[化学工程—陶瓷工业]