Multi-component surface engineering of Na3V2(PO4)2O2F for low-temperature (-40 °C) sodium-ion batteries

Kunxiong Zheng; Shitan Xu; Yu Yao; Dong Chen; Lin Liu; Chen Xu; Yuezhan Feng; Xianhong Rui; Yan Yu

doi:10.1039/d2cc03281c

Multi-component surface engineering of Na₃V₂(PO₄)₂O₂F for low-temperature (-40 °C) sodium-ion batteries

Chem Commun (Camb). 2022 Sep 15;58(74):10349-10352. doi: 10.1039/d2cc03281c.

Authors

Kunxiong Zheng¹, Shitan Xu¹, Yu Yao², Dong Chen¹, Lin Liu¹, Chen Xu³, Yuezhan Feng⁴, Xianhong Rui¹, Yan Yu²

Affiliations

¹ School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China. [email protected].
² Hefei National Research Center for Physical Sciences at the Microscale, Department of Materials Science and Engineering, CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei, Anhui 230026, China. [email protected].
³ Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen 518055, China.
⁴ Key Laboratory of Materials Processing and Mold (Ministry of Education), Zhengzhou University, Zhengzhou 450002, China.

PMID: 36040055
DOI: 10.1039/d2cc03281c

Abstract

A functional Na₃V₂(PO₄)₂O₂F (NVPOF) cathode with a multi-component (Na₃V(PO₄)₂, V₂O₃, and reduced graphene oxide) surface coating is developed via a facile hydrothermal reaction followed by calcination, and exhibits high reversible capability, and long-term cycling stability even at a low temperature of -40 °C. It is demonstrated that the multi-component-coating layer can significantly accelerate the e^-/Na⁺ transport and reduce the interfacial resistance at low temperature. This work provides a novel strategy to boost the kinetics and stability of electrode materials for low-temperature sodium ion batteries.