SnS2 nanosheets arrays sandwiched by N-doped carbon and TiO2 for high-performance Na-ion storage

• 作者: Cao Guan Chuanwei Cheng Haifeng Zhang Weina Ren
• 来源期刊: 绿色能源与环境：英文版
• 学科: 工学
• 年，卷（期）: 2018,（1）
• 页码范围: 42-49
• 页数: 8页
• 分类号: TM912

摘要

In this paper, SnS2 nanosheets arrays sandwiched by porous N-doped carbon and TiO2（TiO2@SnS2@N-C） on flexible carbon cloth are prepared and tested as a free-standing anode for high-performance sodium ion batteries. The as-obtained TiO2@SnS2@N-C composite delivers a remarkable capacity performance(840 mA h g-1 at a current density of 200 mA g-1), excellent rate capability and long-cycling life stability(293 mA h g-1 at 1 A g-1 after 600 cycles). The excellent electrochemical performance can be attributed to the synergistic effect of each component of the unique hybrid structure, in which the SnS2 nanosheets with open framworks offer high capacity, while the porous N-doped carbon nanoplates arrays on flexible carbon cloth are able to improve the conductivity and the TiO2 passivation layer can keep the structure integrity of SnS2 nanosheets.