3D Ag@C Cloth for Stable Anode Free Sodium Metal Batteries

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Hui Wang
  • Shihao Liu
  • Yang Jiang
  • Zhongqiu Tong
  • Di Wu
  • Xinjian Li

Detail(s)

Original languageEnglish
Article number2001050
Journal / PublicationSmall Methods
Volume5
Issue number4
Online published18 Jan 2021
Publication statusPublished - 15 Apr 2021

Abstract

While sodium metal anodes (SMAs) feature many performance advantages in sodium ion batteries (SIBs), severe safety concerns remain for using bulk sodium electrodes. Herein, a 3D Ag@C natrophilic substrate prepared by a facile thermal evaporation deposition method, which can be employed as a much safer “anode-free” SMA, is reported. Initially, there is no bulk sodium on the Ag@C substrate in the assembled SIBs. Upon charging, sodium will be uniformly deposited onto the Ag@C substrate and afterwards functions as a real SMA, thus inheriting the intrinsic merits of SMA and enhancing safety simultaneously. While cycling, the as-synthesized substrate demonstrates superior sodium plating/stripping cycling stability at 1, 2 and 3 mA cm−2 with a capacity of 2 mAh cm−2. Theoretical simulations reveal that Na ions prefer to bind with Ag and form a Na-Ag network, thus clearly revealing uniform sodium deposition on the Ag@C substrate. More importantly, a full battery based on Ag@C and Prussian white with impressive Coulomb efficiency (CE), high rate capability (from 0.1 C to 5 C) and long-term cycling life is illustrated for the first time, thus making Ag@C feasible for the establishment of “anode-free” SIBs with reduced cost, high gravimetric/volumetric energy density and enhanced safety.

Research Area(s)

  • Ag, C natrophilic substrates, AIMD and finite element simulations, anode-free SIBs, Na–Ag networks, sodium metal anodes

Citation Format(s)

3D Ag@C Cloth for Stable Anode Free Sodium Metal Batteries. / Wang, Hui; Wu, Yan; Liu, Shihao; Jiang, Yang; Shen, Dong; Kang, Tianxing; Tong, Zhongqiu; Wu, Di; Li, Xinjian; Lee, Chun-Sing.

In: Small Methods, Vol. 5, No. 4, 2001050, 15.04.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review