导电Ti3O5包覆纳米铝粉的制备及其作为双离子电池负极材料的电化学性能  

Preparation of Conductive Ti3O5 Shell-coating Nano-Al and Its Electrochemical Performance as Anode Materials for Dual-ion Batteries

作　　者：谭靖 毛健[2] 张正权 Tan Jing;Mao Jian;Zhang Zhengquan(Sichuan University,Chengdu 610065,China;Bazhong Yike Carbon Co.,Ltd,Bazhong 636600,China;College of Materials Science and Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学材料科学与工程学院,四川成都610065 [2]四川大学,四川成都610065 [3]巴中意科碳素股份有限公司,四川巴中636600

出　　处：《稀有金属材料与工程》2020年第6期1834-1839,共6页Rare Metal Materials and Engineering

基　　金：Sichuan Science and Technology Program(2019YFG0072)。

摘　　要：采用导电的Ti3O5作为外壳包覆纳米铝粉制备了Al@Ti3O5核壳结构材料,并将其作为负极材料应用到双离子电池(DIB)中。使用中间相碳微球(MCMB)作为正极材料,Al@Ti3O5作为负极材料制作Al@Ti3O5-MCMB双离子电池。结果表明,电池的放电平台可达4.5 V,在电流倍率0.5 C下(电流基于正极石墨的理论比容量计算,1 C=372 mAh·g-1)放电比容量达到130.6 mAh·g-1,比能量密度为278.8 Wh·kg-1。并且在高倍率5 C下循环1000次过程中容量基本保持110 m Ah·g-1不变,循环后容量保持率达到92.9%。Conductive Ti3O5 shell-coating nano-Al powder was used to prepare the core-shell structure material of Al@Ti3O5;it was used as the anode,mesocarbon microbead(MCMB)was the cathode,and the Al@Ti3O5-MCMB dual-ion battery(DIB)was assembled.Results show that the discharge platform of the Al@Ti3O5-MCMB DIB is up to 4.5 V;the discharge capacity can reach 130.6 m Ah·g^-1,and the specific energy density is 278.8 Wh·kg^-1 at a current rate of 0.5 C(the current rate is based on the theoretical specific capacity of graphite,1 C corresponds to 372 m Ah·g^-1).The Al@Ti3O5-MCMB DIB shows excellent cyclic stability,and the capacity remains at around 110 m Ah·g^-1 in the process of 1000 times circulating at the current rate of 5 C,with a capacity retention rate of 92.9%after circulation.

关 键 词：铝负极材料 核壳结构 Ti3O5 中间相碳微球 双离子电池 

分 类 号：TM912[电气工程—电力电子与电力传动] TB383.1[一般工业技术—材料科学与工程]