Affiliation:
1. Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Renewable Energy Conversion and Storage Center College of Chemistry Nankai University Tianjin 300071 P. R. China
2. School of Environmental and Material Engineering Yantai University Yantai 264005 P. R. China
3. Tianjin Key Laboratory for Photoelectric Materials and Devices School of Materials Science and Engineering Tianjin University of Technology Tianjin 300384 P. R. China
Abstract
AbstractAqueous Zn‐based batteries (AZBs) have appealed numerous attentions in the energy storage field due to their low cost, environmental friendliness and high safety. However, the Zn metal anode faces severe challenges of short cycle life because of the dendrite growth and side reactions, which hinders the practical application of AZBs. Herein, an artificial coating layer of cyclized polyacrylonitrile (cPAN) is designed on the Zn anode through spin‐coating and thermal treatment. The cPAN layer possesses abundant N‐containing groups and delocalized π‐conjugation structure, which endows the Zn anode with low nucleation barrier and homogeneous electric field. Benefiting from these synergetic advantages, the nucleation overpotential of Zn is remarkably decreased. Furthermore, no obvious byproduct is observed on the cPANZ‐Zn after cycling. As a result, the resultant cPANZ‐Zn anode delivers a long lifespan of 600 h and high reversibility. cPANZ‐Zn||MnO2 full cells are further assembled and exhibited stable cycling and high rate capability.
Funder
National Natural Science Foundation of China
Subject
Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials