A high-performance rechargeable Mg2+/Li+ hybrid battery using CNT@TiO2 nanocables as the cathode

Caixia Zhu; Yakun Tang; Lang Liu; Rui Sheng; Xiaohui Li; Yang Gao; Yanna NuLi

doi:10.1016/j.jcis.2020.07.104

A high-performance rechargeable Mg²⁺/Li⁺ hybrid battery using CNT@TiO₂ nanocables as the cathode

J Colloid Interface Sci. 2021 Jan 1;581(Pt A):307-313. doi: 10.1016/j.jcis.2020.07.104. Epub 2020 Jul 27.

Authors

Caixia Zhu¹, Yakun Tang¹, Lang Liu², Rui Sheng¹, Xiaohui Li¹, Yang Gao¹, Yanna NuLi³

Affiliations

¹ Key Laboratory of Energy Materials Chemistry, Ministry of Education, Xinjiang University, Urumqi 830046, Xinjiang, PR China; Key Laboratory of Advanced Functional Materials, Autonomous Region, Xinjiang University, Urumqi 830046, Xinjiang, PR China; Institute of Applied Chemistry, College of Chemistry, Xinjiang University, Urumqi 830046, Xinjiang, PR China.
² Key Laboratory of Energy Materials Chemistry, Ministry of Education, Xinjiang University, Urumqi 830046, Xinjiang, PR China; Key Laboratory of Advanced Functional Materials, Autonomous Region, Xinjiang University, Urumqi 830046, Xinjiang, PR China; Institute of Applied Chemistry, College of Chemistry, Xinjiang University, Urumqi 830046, Xinjiang, PR China. Electronic address: llyhs1973@sina.com.
³ School of Chemistry and Chemical Engineering, Shanghai Electrochemical Energy Devices Research Center, Shanghai Jiao Tong University, Shanghai 200240, PR China.

PMID: 32771740
DOI: 10.1016/j.jcis.2020.07.104

Abstract

Porous CNT@TiO₂ nanocables are prepared via an impregnation method combined with calcination, which not only display the illusive capacity of 233.5 mAh g^-1 but also possess outstanding rate performance (144.9 mAh g^-1 at 500 mA g^-1). Compared with TiO₂ nanoparticles and nanotubes, CNT@TiO₂ exhibits the excellent electrochemical performance on account of the unique coaxial nanocable feature (short ion diffusion path, large contact surface area, supernal conductivity, and favorable structure stability), which simultaneously overcomes the aggregation of TiO₂ particles and the collapse of TiO₂ nanotubes. Importantly, there are no significant changes in the morphology and phase after long cycling, meaning that CNT@TiO₂ has a highly structural stability and reversibility. Therefore, CNT@TiO₂ can be applied as a promising cathode material for Mg²⁺/Li⁺ hybrid batteries.

Keywords: CNTs; Cathode; Coaxial nanocables; Mg(2+)/Li(+) hybrid batteries; TiO(2).