煅烧温度对锂离子电池负极材料钛铌氧纳米纤维电化学性能的影响研究  

Effect of Sintering Temperature on Electrochemical Properties of TiNb24O62 Nanofibers Anode for Lithium Ion Batteries

作　　者：余彪 李鹏 南云 Yu Biao;Li Peng;Nan Yun(Ningbo Electric Power Supply Company,Ningbo 315000,China;Zhejiang Yuntan Technology Co.,Ltd.,Ningbo 315000,China)

机构地区：[1]宁波供电公司,浙江宁波315000 [2]浙江云碳科技有限公司,浙江宁波315000

出　　处：《广东化工》2024年第17期5-7,10,共4页Guangdong Chemical Industry

摘　　要：纳米结构的材料具有一些独特的性质可提升材料的电化学性能。于此,本文报道了TiNb_(24)O_(62)纳米纤维的制备和相应电化学性能的研究。结果显示在850℃下煅烧所得到TiNb_(24)O_(62)纳米纤维具有优异的电化学性能,这是由于其纳米纤维由粒径为80 nm的纳米颗粒组成,有利于锂离子的快速迁移和电子的传输。具体来说,在0.4 C时,在850℃下煅烧所得到TiNb_(24)O_(62)纳米纤维可提供243.5 mAh·g^(-1)的充电比容量,同时,其也具有优异的倍率性能,5 C下充电可逆容量可达142.0 mAh·g^(-1)。Materials with nanostructure possessed some unique properties can improve their electrochemical performance in rechargeable batteries.Here,this study reports the preparation and electrochemical performance of TiNb_(24)O_(62) nanofibers as anode material for lithium ion batteries.The results suggest that TiNb_(24)O_(62) nanofibers sintered at 850℃can exhibit excellent electrochemical performance since their nanofibers consist of nanoparticles with the size of about 80 nm.Small-sized active particles shorten the diffusion path for lithium ions,bringing enhanced electronic/ionic conductivity.As a result,the TiNb_(24)O_(62) nanofibers can provide the capacity of 243.5 mAh·g^(-1)at 0.4 C and show good rate performance with the capacity of 142.0 mAh·g^(-1)at 5 C.

关 键 词：锂离子电池 负极材料 TiNb_(24)O_(62) 静电纺丝 纳米纤维 电化学性能 

分 类 号：TM912[电气工程—电力电子与电力传动]