In situ growth of Sn nanoparticles confined carbon-based TiO2/TiN composite with long-term cycling stability for sodium-ion batteries
In situ growth of Sn nanoparticles confined carbon-based TiO2/TiN composite with long-term cycling stability for sodium-ion batteries
复制标题
原位生长 Sn 纳米粒子限制碳基 TiO2/TiN 复合材料,具有钠离子电池的长期循环稳定性
DOI:
10.1016/j.electacta.2020.137450
复制
发表时间:
2020-11
影响因子:
6.6
通讯作者:
罗永松
中科院分区:
文献类型:
--
作者:
张英歌;王阳博;孔德志;杨亚;王莹珲;郭燕;陆阳;Jang-Kyo Kim;罗永松
Sn has attracted tremendous attentions in sodium ion batteries (SIBs) for its high theoretical capacity, low cost and high electronic conductivity. However, one of the critical problems to hinder the widely practical application of SIBs is the fast capacity decay during repeated charge/discharge cycles owing to the vast volume expansion and aggregation of Sn nanoparticles. Herein, the spatially confined strategy is introduced to synthesize Sn/C@TiO2/TiN composite to address the above issues. The dual space-confined layers of carbonaceous microspheres and TiO2could effectively buffer the volume expansion of Sn nanoparticles. Moreover, the dual conductive matrix of the inner carbon and outer TiN are favorable to enhance the electrode conductivity and accelerate Na+and electrons transfer. In addition, the first-principles simulation is further employed to investigate the electrochemical dynamics (structural deformation) of the electrode. As a result, Sn/C@TiO2/TiN electrode exhibits a long cycle life stability (retains a capacity of 201.2 mAh/g after 500 cycles at 0.5 A/g). This spatially confined strategy might exert a profound impact on designing desirable electrode materials with long cycle life and fast redox kinetics in SIBs.
登录
查看更多内容
影响因子:
27.8
作者:
Fan Zhang;Chuan Xia;Jiajie Zhu;B. Ahmed;Hanfeng Liang;Dhinesh Babu Velusamy;U. Schwingenschlögl
通讯作者:
Fan Zhang;Chuan Xia;Jiajie Zhu;B. Ahmed;Hanfeng Liang;Dhinesh Babu Velusamy;U. Schwingenschlögl
影响因子:
3
作者:
Dandan Han;Shucong Xu;Junjun Li;Bao Liu;Gengxin Song;Zhendong Guo
通讯作者:
Dandan Han;Shucong Xu;Junjun Li;Bao Liu;Gengxin Song;Zhendong Guo
影响因子:
8.6
作者:
Deng, Da;Lee, Jim Yang
通讯作者:
Lee, Jim Yang
影响因子:
6.6
作者:
Guo, Yan;Zhang, Yingge;Luo, Yongsong
通讯作者:
Luo, Yongsong
影响因子:
9.5
作者:
Ji, Liwen;Zhou, Weidong;Xiao, Xingcheng
通讯作者:
Xiao, Xingcheng