Jian Wang, Hongfei Hu, Lujie Jia, Jing Zhang, Quan Zhuang, Linge Li, Yongzheng Zhang, Dong Wang, Qinghua Guan, Huimin Hu, Meinan Liu, Liang Zhan, Henry Adenusi, Stefano Passerini, Hongzhen Lin
{"title":"Fast interfacial electrocatalytic desolvation enabling low-temperature and long-cycle-life aqueous Zn batteries","authors":"Jian Wang, Hongfei Hu, Lujie Jia, Jing Zhang, Quan Zhuang, Linge Li, Yongzheng Zhang, Dong Wang, Qinghua Guan, Huimin Hu, Meinan Liu, Liang Zhan, Henry Adenusi, Stefano Passerini, Hongzhen Lin","doi":"10.1002/inf2.12558","DOIUrl":null,"url":null,"abstract":"<p>Low-temperature zinc batteries (LT-ZIBs) based on aqueous electrolytes show great promise for practical applications owing to their natural resource abundance and low cost. However, they suffer from sluggish kinetics with elevated energy barriers due to the dissociation of bulky Zn(H<sub>2</sub>O)<sub>6</sub><sup>2+</sup> solvation structure and free Zn<sup>2+</sup> diffusion, resulting in unsatisfactory lifespan and performance. Herein, dissimilar to solvation shell tuning or layer spacing enlargement engineering, delocalized electrons in cathode through constructing intrinsic defect engineering is proposed to achieve a rapid electrocatalytic desolvation to obtain free Zn<sup>2+</sup> for insertion/extraction. As revealed by density functional theory calculations and interfacial spectroscopic characterizations, the intrinsic delocalized electron distribution propels the Zn(H<sub>2</sub>O)<sub>6</sub><sup>2+</sup> dissociation, forming a reversible interphase and facilitating Zn<sup>2+</sup> diffusion across the electrolyte/cathode interface. The as-fabricated oxygen defect-rich V<sub>2</sub>O<sub>5</sub> on hierarchical porous carbon (ODVO@HPC) electrode exhibits high capacity robustness from 25 to −20°C. Operating at −20°C, the ODVO@HPC delivers 191 mAh g<sup>−1</sup> at 50 A g<sup>−1</sup> and lasts for 50 000 cycles at 10 A g<sup>−1</sup>, significantly enhancing the power density and lifespan under low-temperature environments in comparison to previous reports. Even with areal mass loading of ~13 mg cm<sup>−2</sup>, both coin cells and pouch batteries maintain excellent stability and areal capacities, realizing practical high-performance LT-ZIBs.</p>","PeriodicalId":48538,"journal":{"name":"Infomat","volume":"6 7","pages":""},"PeriodicalIF":22.7000,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/inf2.12558","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Infomat","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/inf2.12558","RegionNum":1,"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
Low-temperature zinc batteries (LT-ZIBs) based on aqueous electrolytes show great promise for practical applications owing to their natural resource abundance and low cost. However, they suffer from sluggish kinetics with elevated energy barriers due to the dissociation of bulky Zn(H2O)62+ solvation structure and free Zn2+ diffusion, resulting in unsatisfactory lifespan and performance. Herein, dissimilar to solvation shell tuning or layer spacing enlargement engineering, delocalized electrons in cathode through constructing intrinsic defect engineering is proposed to achieve a rapid electrocatalytic desolvation to obtain free Zn2+ for insertion/extraction. As revealed by density functional theory calculations and interfacial spectroscopic characterizations, the intrinsic delocalized electron distribution propels the Zn(H2O)62+ dissociation, forming a reversible interphase and facilitating Zn2+ diffusion across the electrolyte/cathode interface. The as-fabricated oxygen defect-rich V2O5 on hierarchical porous carbon (ODVO@HPC) electrode exhibits high capacity robustness from 25 to −20°C. Operating at −20°C, the ODVO@HPC delivers 191 mAh g−1 at 50 A g−1 and lasts for 50 000 cycles at 10 A g−1, significantly enhancing the power density and lifespan under low-temperature environments in comparison to previous reports. Even with areal mass loading of ~13 mg cm−2, both coin cells and pouch batteries maintain excellent stability and areal capacities, realizing practical high-performance LT-ZIBs.
期刊介绍:
InfoMat, an interdisciplinary and open-access journal, caters to the growing scientific interest in novel materials with unique electrical, optical, and magnetic properties, focusing on their applications in the rapid advancement of information technology. The journal serves as a high-quality platform for researchers across diverse scientific areas to share their findings, critical opinions, and foster collaboration between the materials science and information technology communities.