Affiliation:
1. Institute of New Carbon Materials Taiyuan University of Technology Taiyuan 030024 China
2. Institute of Micro/Nano Materials and Devices Ningbo University of Technology Ningbo 315016 China
3. Hunan Key Laboratory of Two‐Dimensional Materials State Key Laboratory for Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha 410082 China
Abstract
AbstractFor exploring advanced Zn‐ion batteries (ZIBs) with long lifespan and high Coulombic efficiency (CE), the critically important point is to limit the undesired Zn dendrite and parasitic reactions. Among the coating for electrode is a promising strategy, relying on the trade‐off between its thickness and stability to achieve the ultra‐stable Zn anodes in ZIBs. Herein, a submicron‐thick (≈0.4 µm) zincophilic CrN coatings are fabricated by a facile and industry‐compatible magnetron sputtering approach. It is exhilarating that the ultrathin and dense CrN coatings with strong adsorption ability for Zn2+ exhibit an impressive lifespan up to 3700 h with ≈100% CE at 1 mA cm−2. Along with the experiments and theoretical calculations, it is verified that the introduced CrN coatings cannot only effectively suppress the dendrite growth and notorious parasitic reactions, but also allow the uniform Zn deposition due to the reduced nucleation energy. Moreover, the as‐assembled Zn@CrN‖MnO2 full cell delivers a high specific capacity of 171.1 mAh g−1 after 1000 cycles at 1 A g−1, much better than that of Zn‖MnO2 analog (97.8 mAh g−1). This work provides a facile strategy for scalable fabrication of ultrathin zincophilic coating to push forward the practical applications of ZIBs.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Ningbo Municipality
Natural Science Foundation of Shanxi Province
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry