Dong Il Kim, Hee Bin Jeong, Jungmoon Lim, Hyeong Seop Jeong, Min Kyeong Kim, Sangyeon Pak, Sanghyo Lee, Geon-Hyoung An, Sang-Soo Chee, Jin Pyo Hong, SeungNam Cha, John Hong
{"title":"A Practical Zinc Metal Anode Coating Strategy Utilizing Bulk h-BN and Improved Hydrogen Redox Kinetics","authors":"Dong Il Kim, Hee Bin Jeong, Jungmoon Lim, Hyeong Seop Jeong, Min Kyeong Kim, Sangyeon Pak, Sanghyo Lee, Geon-Hyoung An, Sang-Soo Chee, Jin Pyo Hong, SeungNam Cha, John Hong","doi":"10.1002/eem2.12826","DOIUrl":null,"url":null,"abstract":"Achieving high-performance aqueous zinc-ion batteries requires addressing the challenges associated with the stability of zinc metal anodes, particularly the formation of inhomogeneous zinc dendrites during cycling and unstable surface electrochemistry. This study introduces a practical method for scattering untreated bulk hexagonal boron nitride (h-BN) particles onto the zinc anode surface. During cycling, stabilized zinc fills the interstices of scattered h-BN, resulting in a more favorable (002) orientation. Consequently, zinc dendrite formation is effectively suppressed, leading to improved electrochemical stability. The zinc with scattered h-BN in a symmetric cell configuration maintains stability 10 times longer than the bare zinc symmetric cell, lasting 500 hours. Furthermore, in a full cell configuration with α-MnO<sub>2</sub> cathode, increased H<sup>+</sup> ion activity can effectively alter the major redox kinetics of cycling due to the presence of scattered h-BN on the zinc anode. This shift in H<sup>+</sup> ion activity lowers the overall redox potential, resulting in a discharge capacity retention of 96.1% for 300 cycles at a charge/discharge rate of 0.5 A g<sup>−1</sup>. This study highlights the crucial role of surface modification, and the innovative use of bulk h-BN provides a practical and effective solution for improving the performance and stability.","PeriodicalId":11554,"journal":{"name":"Energy & Environmental Materials","volume":null,"pages":null},"PeriodicalIF":13.0000,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Energy & Environmental Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1002/eem2.12826","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Achieving high-performance aqueous zinc-ion batteries requires addressing the challenges associated with the stability of zinc metal anodes, particularly the formation of inhomogeneous zinc dendrites during cycling and unstable surface electrochemistry. This study introduces a practical method for scattering untreated bulk hexagonal boron nitride (h-BN) particles onto the zinc anode surface. During cycling, stabilized zinc fills the interstices of scattered h-BN, resulting in a more favorable (002) orientation. Consequently, zinc dendrite formation is effectively suppressed, leading to improved electrochemical stability. The zinc with scattered h-BN in a symmetric cell configuration maintains stability 10 times longer than the bare zinc symmetric cell, lasting 500 hours. Furthermore, in a full cell configuration with α-MnO2 cathode, increased H+ ion activity can effectively alter the major redox kinetics of cycling due to the presence of scattered h-BN on the zinc anode. This shift in H+ ion activity lowers the overall redox potential, resulting in a discharge capacity retention of 96.1% for 300 cycles at a charge/discharge rate of 0.5 A g−1. This study highlights the crucial role of surface modification, and the innovative use of bulk h-BN provides a practical and effective solution for improving the performance and stability.
期刊介绍:
Energy & Environmental Materials (EEM) is an international journal published by Zhengzhou University in collaboration with John Wiley & Sons, Inc. The journal aims to publish high quality research related to materials for energy harvesting, conversion, storage, and transport, as well as for creating a cleaner environment. EEM welcomes research work of significant general interest that has a high impact on society-relevant technological advances. The scope of the journal is intentionally broad, recognizing the complexity of issues and challenges related to energy and environmental materials. Therefore, interdisciplinary work across basic science and engineering disciplines is particularly encouraged. The areas covered by the journal include, but are not limited to, materials and composites for photovoltaics and photoelectrochemistry, bioprocessing, batteries, fuel cells, supercapacitors, clean air, and devices with multifunctionality. The readership of the journal includes chemical, physical, biological, materials, and environmental scientists and engineers from academia, industry, and policy-making.