Stable interphase chemistry of textured Zn anode for rechargeable aqueous batteries

Stable interphase chemistry of textured Zn anode for rechargeable aqueous batteries

Science Bulletin

10.1016/j.scib.2022.01.010

http://dx.doi.org/10.1016/j.scib.2022.01.010

Jindi Wang, Bao Zhang, Zhao Cai, Renming Zhan, Wenyu Wang, Lin Fu, Mintao Wan, Run Xiao, Yangtao Ou, Li Wang, Jianjun Jiang, Zhi Wei Seh, Hong Li, Yongming Sun

Batteries, Multidisciplinary

17 January 2022

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

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%.

Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)

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

https://oar.a-star.edu.sg/communities-collections/articles/18279

2095-9273

Institute of Materials Research and Engineering