3D Ag@C Cloth for Stable Anode Free Sodium Metal Batteries
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Related Research Unit(s)
Detail(s)
Original language | English |
---|---|
Article number | 2001050 |
Journal / Publication | Small Methods |
Volume | 5 |
Issue number | 4 |
Online published | 18 Jan 2021 |
Publication status | Published - 15 Apr 2021 |
Link(s)
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 et al.
In: Small Methods, Vol. 5, No. 4, 2001050, 15.04.2021.
In: Small Methods, Vol. 5, No. 4, 2001050, 15.04.2021.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review