Rational Design of Core‐Shell Structured C@SnO 2 @CNTs Composite with Enhanced Lithium Storage Performance

• Published in: ChemElectroChem Vol. 7; no. 4; pp. 1016 - 1022
• Main Authors: Cheng, Yayi, Huang, Jianfeng, Cao, Liyun, Xie, Hui, Yu, Fangli, Xi, Shaohua, Shi, Bingyao, Li, Jiayin
• Format: Journal Article
• Language: English
• Published: 17.02.2020
• ISSN: 2196-0216; 2196-0216
• DOI: 10.1002/celc.201901732

Abstract SnO 2 is considered to be a potential anode material in lithium‐ion batteries (LIBs) owing to its high specific capacity of 1494 mAh g −1 . Herein, we reported the unique core‐shell structured C@SnO 2 @CNTs composite with controllable outer carbon thickness, which was synthesized by a simple hydrothermal method and subsequent annealing process. Results show that the C@SnO 2 @CNTs with outer carbon layer around 1.8 nm displays high reversible capacity and long‐term cycling performance. It maintains a capacity of 850 mAh g −1 should be at current density of 200 mA g −1 up to 100 cycles. Further analysis found that the C@SnO 2 @CNTs composite exhibits excellent structural stability even after 100 cycles, which contributes to provide a highway for charge transmission. These results give rise to superior electrochemical performance of C@SnO 2 @CNTs composite and provide new insight for design metal oxide composite anode materials in LIBs field.