Integrated carbon nanospheres arrays as anode materials for boosted sodium ion storage

作     者：Wangjia Tang Jianbo Wu Xiuli Wang Xinhui Xia Jiangping Tu 

作者机构：State Key Laboratory of Silicon MaterialsKey Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Provinceand School of Materials Science and EngineeringZhejiang University Zhejiang Provincial Key Laboratory for Cutting Tools Taizhou University 

出 版 物：《Green Energy & Environment》 (绿色能源与环境（英文版）)

年 卷 期：2018年第3卷第1期

页      面：50-55页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：supported by National Natural Science Foundation of China (Grant. Nos. 51772272, 51502263) Qianjiang Talents Plan D (Grant. No. QJD1602029) Program for Innovative Research Team in University of Ministry of Education of China (IRT13037) Startup Foundation for Hundred-Talent Program of Zhejiang University the Fundamental Research Funds for the Central Universities (No. 2015XZZX010-02) 

主　　题：Carbon nanospheres Anode Sodium ion batteries Arrays Porous film 

摘      要：Developing cost-effective advanced carbon anode is critical for innovation of sodium ion batteries. Herein, we develop a powerful combined method for rational synthesis of free-standing binder-free carbon nanospheres arrays via chemical bath plus hydrothermal process. Impressively,carbon spheres with diameters of 150-250 nm are randomly interconnected with each other forming highly porous arrays. Positive advantages including large porosity, high surface and strong mechanical stability are combined in the carbon nanospheres arrays. The obtained carbon nanospheres arrays are tested as anode material for sodium ion batteries(SIBs) and deliver a high reversible capacity of 102 mAh g^(-1) and keep a capacity retention of 95% after 100 cycles at a current density of 0.25 A g^(-1) and good rate performance(65 mAh g^(-1) at a high current density of 2 A g^(-1)). The good electrochemical performance is attributed to the stable porous nanosphere structure with fast ion/electron transfer characteristics.