SnS2 quantum dots-coated VO2@carbon nanorods for secondary battery displaying high capacity and rate-performance

Tianli Han; Yan Wang; Kehao Tao; Xiangbin Zeng; Peng Zhan; Yajun Zhu; Jinjin Li; Jinyun Liu

doi:10.1039/d4cc00641k

SnS₂ quantum dots-coated VO₂@carbon nanorods for secondary battery displaying high capacity and rate-performance

Chem Commun (Camb). 2024 Apr 4;60(29):3918-3921. doi: 10.1039/d4cc00641k.

Authors

Tianli Han¹, Yan Wang¹, Kehao Tao², Xiangbin Zeng^{3

4}, Peng Zhan³, Yajun Zhu^{1

5}, Jinjin Li², Jinyun Liu¹

Affiliations

¹ Key Laboratory of Functional Molecular Solids, Ministry of Education, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, PR China. jyliu@ahnu.edu.cn.
² National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Shanghai Jiao Tong University, Shanghai 200240, PR China. lijinjin@sjtu.edu.cn.
³ Anhui Deeiot Energy Technology Co., Ltd, Wuhu, Anhui 241002, PR China.
⁴ Chery New Energy Automobile Co., Ltd, Wuhu, Anhui 241000, PR China.
⁵ Institute of Energy, Hefei Comprehensive National Science Center, Hefei, Anhui 230031, PR China.

PMID: 38497802
DOI: 10.1039/d4cc00641k

Abstract

Electrode materials optimization is one of the keys to improving the energy storage characteristics of secondary batteries. Herein, a VO₂@carbon@SnS₂ composite is developed by coating SnS₂ quantum dots (QDs) on lamellar VO₂@carbon nanorods, yielding a high-performance aluminum-ion battery cathode. SnS₂ QDs embedded in VO₂@carbon accelerate electron transport, while the in situ coating of carbon improves cycling stability. When cycling at 0.5 A g^-1, capacity is maintained at 157.6 mA h g^-1 after 200 cycles. Even at 1.0 A g^-1, the cathode can be stably cycled 1000 times. Capacity remains at 176.3 mA h g^-1 and coulombic efficiency is 99.1% at temperatures below -10 °C after 100 cycles. These findings provide new ideas for the development of QD-modified composites for application in secondary batteries.