Electrospinning Sn@C nanofibers for high-performance flexible lithium ion battery anodes

3rd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Li, Jing^1 ; Zou, Peichao^1 ; Wang, Ronghe^1 ; Yang, Cheng^1

Graduate School at Shenzhen, Tsinghua University, Shenzhen, Guangdong

518055, China^1

关键词: Confinement effects;    Electrode material;    Electrospinning method;    Lithium intercalation/de-intercalation;    Lithium-ion battery anodes;    Nanofiber membrane;    Portable electronics;    Reversible capacity;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/300/4/042021/pdf
DOI  :  10.1088/1755-1315/300/4/042021

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Lithium ion batteries are considered as one of the most important energy storage devices in the field of portable electronics and electric vehicles. However, exploring novel and high-performance electrode materials are still urgently needed, as the state-of-the-art lithium ion batteries cannot meet the ever-increasing demand for high energy/power densities. Metal tin and its oxides are promising lithium ion battery anodes, but suffering from drastic volume change and crack issues during lithium intercalation/deintercalation cycling. Here we report a feasible technology to fabricate flexible and free-standing Sn@C nanofiber membrane via electrospinning method, consisting of one dimensional carbon matrix with Sn nanoparticles confined inside. Owing to the superior electron/ion transfer ability and confinement effect from the carbon coating, the as-obtained Sn@ C electrode exhibits a capacity of 668 mA h g-1 at 1 A g-1 even after 350 cycles and a reversible capacity of 263 mA h g-1 can be achieved at an ultrahigh current density of 10 A g-1. In all, this work provides a promising anode for practical application on lithium ion batteries.