Affiliation:
1. School of Materials Science and Engineering Hunan Provincial Key Laboratory of Electronic Packaging and Advanced Functional Materials Central South University Changsha 410083 P. R. China
2. College of Biological and Chemical Engineering Guangxi University of Science and Technology Liuzhou 545006 P. R. China
3. School of Physics and Electronics Hunan University Changsha 410082 P. R. China
4. Department of Materials Science and Engineering City University of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong 999077 P. R. China
Abstract
AbstractHigh‐energy electrolytic Zn//MnO2batteries show potential for grid‐scale energy storage, but the severe hydrogen evolution corrosion (HEC) caused by acidic electrolytes results in subdued durability. Here, an all‐around protection strategy is reported for achieving stable Zn metal anodes. First, a proton‐resistant Pb‐containing (Pb and Pb(OH)2) interface is constructed on a Zn anode (denoted as Zn@Pb), which in situ forms PbSO4during H2SO4corrosion and protects the Zn substrate from HEC. Second, to improve the plating/stripping reversibility of Zn@Pb, Pb(CH3COO)2an additive (denoted as Zn@Pb‐Ad) is introduced, which triggers PbSO4precipitation and releases trace Pb2+that can dynamically deposit a Pb layer on the Zn plating layer to suppress HEC. The superior HEC resistance stems from the low affinity of PbSO4and Pb for H+, as well as strong bonding between Pb–Zn or Pb–Pb, which increase the hydrogen evolution reaction overpotential and the H+corrosion energy barrier. Consequently, the Zn@Pb‐Ad//MnO2battery runs stably for 630 and 795 h in 0.2 and 0.1 mH2SO4electrolytes, respectively, which are >40 times better than that of bare Zn. The as‐prepared A h‐level battery achieves a one‐month calendar life, opening the door to the next generation of high‐durable grid‐scale Zn batteries.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Guangxi Province
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Cited by
58 articles.
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