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Embedding CoMoO4 nanoparticles into porous electrospun carbon nanofibers towards superior lithium storage performance

2019; Elsevier BV; Volume: 553; Linguagem: Inglês

10.1016/j.jcis.2019.06.039

1095-7103

Sanmu Xie, Hongkang Wang, Tianhao Yao, Zhengdong Wang, Chundong Wang, Jian‐Wen Shi, Xiaogang Han, Tianxi Liu, Yonghong Cheng,

Advanced Battery Materials and Technologies

CoMoO4 nanoparticles have been successfully in-situ formed and simultaneously embedded within the porous carbon nanofibers (CoMoO4/CNFs) via a facile electrospinning-annealing strategy. The porous CoMoO4/CNFs exhibit a specific surface area of 255.3 m2/g and a pore volume of 0.52 cc/g with average pore diameter of 43.5 nm. The carbon content in the CoMoO4/CNFs can be readily controlled by adjusting the annealing temperature. When examined as anode materials for lithium ion batteries (LIBs), the CoMoO4/CNFs demonstrate superior electrochemical performance, delivering a high reversible capacity of 802 mA h/g after 200 cycles at 200 mA/g and a high-rate capacity of 574 mA h/g at 2000 mA/g. The excellent lithium storage behavior can be attributed to the incorporation of CoMoO4 nanoparticles into the porous N-doped graphitic carbon nanofibers, which efficiently buffer the volume changes of CoMoO4 upon lithiation/delithiation and maintain the overall electrode conductivity/integrity.