Embedding Submicron SiO2 into Porous Carbon as Advanced Lithium-ion Batteries Anode with Ultralong Cycle Life and Excellent Rate Capability
The SiO2/C composites with submicron SiO2 particles embedded into the porous carbon are prepared via a facile,cost-effective,and environmentally benign and Pechini method.The electrochemical performances of the SiO2/C composites are found to be related to its carbon content.For the SiO2/C composites with C contents ranging from 5 wt%to 23 wt%,the sample with 14 wt%carbon delivers the highest reversible capacity of 653 mAh g-1(based on the mass of the SiO2/C composite)at 100 mA g-1 with a capacity retention of 95%after 150 cycles.Even at a current density of 1.0 A g-1,it still delivers a reversible capacity of 534 mAh g-1 over 1000 cycles,which is the best cycle performance reported for the SiO2 anode materials.The ultralong cycle life and excellent rate capability can be attributed to both the porous carbon matrix and the favorable connection between SiO2 particles and porous carbon.
Yun Chen Yang Xia Yongping Gan Xinyong Tao Hui Huang Jun Zhang Wenkui Zhang Chu Liang
College of Materials Science and Engineering,Zhejiang University of Technology Hangzhou,China
国内会议
2017中国(赣州)国际新能源汽车动力电池高峰论坛暨第九届中国储能与动力电池及其关键材料学术研讨与技术交流会
江西赣州
英文
1-1
2017-10-13（万方平台首次上网日期，不代表论文的发表时间）