Stable interphase chemistry of textured Zn anode for rechargeable aqueous batteries

Page view(s)
60
Checked on Feb 24, 2024
Stable interphase chemistry of textured Zn anode for rechargeable aqueous batteries
Title:
Stable interphase chemistry of textured Zn anode for rechargeable aqueous batteries
Journal Title:
Science Bulletin
Publication Date:
17 January 2022
Citation:
Wang, J., Zhang, B., Cai, Z., Zhan, R., Wang, W., Fu, L., Wan, M., Xiao, R., Ou, Y., Wang, L., Jiang, J., Seh, Z. W., Li, H., & Sun, Y. (2022). Stable interphase chemistry of textured Zn anode for rechargeable aqueous batteries. Science Bulletin, 67(7), 716–724. https://doi.org/10.1016/j.scib.2022.01.010
Abstract:
Despite the advances of aqueous zinc (Zn) batteries as sustainable energy storage systems, their practical application remains challenging due to the issues of spontaneous corrosion and dendritic deposits at the Zn metal anode. In this work, conformal growth of zinc hydroxide sulfate (ZHS) with dominating (0 0 1) facet was realized on (0 0 2) plane-dominated Zn metal foil fabricated through a facile thermal annealing process. The ZHS possessed high Zn2+ conductivity (16.9 mS cm−1) and low electronic conductivity (1.28 × 104 Ω cm), and acted as a heterogeneous and robust solid electrolyte interface (SEI) layer on metallic Zn electrode, which regulated the electrochemical Zn plating behavior and suppressed side reactions simultaneously. Moreover, low self-diffusion barrier along the (0 0 2) plane promoted the 2D diffusion and horizontal electrochemical plating of metallic Zn for (0 0 2)-textured Zn electrode. Consequently, the as-achieved Zn electrode exhibited remarkable cycling stability over 7000 cycles at 2 mA cm−2 and 0.5 mAh cm−2 with a low overpotential of 25 mV in symmetric cells. Pairing with a MnO2 cathode, the as-achieved Zn electrode achieved stable cell cycling with 92.7% capacity retention after 1000 cycles at 10 C with a remarkable average Coulombic efficiency of 99.9%.
License type:
Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
Funding Info:
This research / project is supported by the Singapore National Research Foundation - NRF Fellowship
Grant Reference no. : NRF-NRFF2017-04

This research / project is supported by the A*STAR - Central Research Fund Award
Grant Reference no. : N.A
Description:
ISSN:
2095-9273
Files uploaded: