Symmetric Sodium-Ion Battery Based on Dual-Electron Reactions of NASICON-Structured Na3MnTi(PO4)3Material

Yu Zhou, Xiji Shao, Kwok Ho Lam, You Zheng, Lingzhi Zhao, Kedong Wang, Jinzhu Zhao, Fuming Chen, Xianhua Hou

Research output: Journal article publicationJournal articleAcademic researchpeer-review

22 Citations (Scopus)

Abstract

Symmetric sodium-ion batteries possess promising features such as low cost, easy manufacturing process, and facile recycling post-process, which are suitable for the application of large-scale stationary energy storage. Herein, we proposed a symmetric sodium-ion battery based on dual-electron reactions of a NASICON-structured Na3MnTi(PO4)3 material. The Na3MnTi(PO4)3 electrode can deliver a stable capacity of up to 160 mAh g-1 with a Coulombic efficiency of 97% at 0.1 C by utilizing the redox reactions of Ti3+/4+, Mn2+/3+, and Mn3+/4+. This is the first time to investigate the symmetric sodium-ion full cell using Na3MnTi(PO4)3 as both cathode and anode in the organic electrolyte, demonstrating excellent reversibility and cycling performance with voltage plateaus of about 1.4 and 1.9 V. The full cell exhibits a reversible capacity of 75 mAh g-1 at 0.1 C and an energy density of 52 Wh kg-1. In addition, both ex situ X-ray diffraction (XRD) analysis and first-principles calculations are employed to investigate the sodiation mechanism and structural evolution. The current research provides a feasible strategy for the symmetric sodium-ion batteries to achieve high energy density.

Original languageEnglish
Pages (from-to)30328-30335
Number of pages8
JournalACS Applied Materials and Interfaces
Volume12
Issue number27
DOIs
Publication statusPublished - 8 Jul 2020

Keywords

  • multielectron redox reaction
  • NaMnTi(PO)
  • NASICON structure
  • sodium-ion batteries
  • symmetric full cell

ASJC Scopus subject areas

  • Materials Science(all)

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