{"title":"A New High-Performance Porous Carbon-Coated Mn3O4/Na2CO3 Cathode for Suppressing Mn 2+ Dissolution in Aqueous Zinc Ion Batteries.","authors":"Guangxing Pan, Yuanyuan Hu, Zhenyuan Wang, Hao Li, Dong Wu, Ling Zhang, Jiaheng Zhang","doi":"10.1002/asia.202400290","DOIUrl":null,"url":null,"abstract":"<p><p>Manganous-manganic oxide (Mn3O4), akin to other manganese-based oxides, faces several critical challenges such as substantial capacity fading and limited rate performance due to its inferior electrical conductivity, in addition to the inevitable dissociation of Mn 2+ . To address these issues, we introduce for the first time a novel carbon-coated Mn3O4/Na2CO3 (Mn3O4/Na2CO3/C) composite material. Comprehensive characterizations indicate that Na2CO3 effectively curtails Mn 2+ dissolution, enhances carbon encapsulation throughout charging/discharging cycles, and exposes additional active sites on the Mn3O4/Na2CO3/C composite. Electrochemical assessments confirm that the Mn3O4/Na2CO3/C-2 cathode exhibits exceptional electrochemical performance, outperforming other cathodes in the ZnSO4 system. Moreover, the Mn3O4/Na2CO3/C-2 cathode delivers a high specific capacity of ~550 mAh g -1 at 0.1 A g -1 and maintains a significant capacity of ~230 mAh g -1 after 360 cycles at 1.0 A g -1 within the 2.0 M ZnSO4+0.2 M MnSO4 electrolyte system, demonstrating its potential as a high-performance cathode material for aqueous zinc-ion batteries.</p>","PeriodicalId":145,"journal":{"name":"Chemistry - An Asian Journal","volume":null,"pages":null},"PeriodicalIF":3.5000,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemistry - An Asian Journal","FirstCategoryId":"1","ListUrlMain":"https://doi.org/10.1002/asia.202400290","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Manganous-manganic oxide (Mn3O4), akin to other manganese-based oxides, faces several critical challenges such as substantial capacity fading and limited rate performance due to its inferior electrical conductivity, in addition to the inevitable dissociation of Mn 2+ . To address these issues, we introduce for the first time a novel carbon-coated Mn3O4/Na2CO3 (Mn3O4/Na2CO3/C) composite material. Comprehensive characterizations indicate that Na2CO3 effectively curtails Mn 2+ dissolution, enhances carbon encapsulation throughout charging/discharging cycles, and exposes additional active sites on the Mn3O4/Na2CO3/C composite. Electrochemical assessments confirm that the Mn3O4/Na2CO3/C-2 cathode exhibits exceptional electrochemical performance, outperforming other cathodes in the ZnSO4 system. Moreover, the Mn3O4/Na2CO3/C-2 cathode delivers a high specific capacity of ~550 mAh g -1 at 0.1 A g -1 and maintains a significant capacity of ~230 mAh g -1 after 360 cycles at 1.0 A g -1 within the 2.0 M ZnSO4+0.2 M MnSO4 electrolyte system, demonstrating its potential as a high-performance cathode material for aqueous zinc-ion batteries.
锰-锰氧化物(Mn3O4)与其他锰基氧化物一样,也面临着一些严峻的挑战,如由于其导电性较差,除了不可避免地解离出 Mn 2+ 外,还存在容量大幅衰减和速率性能受限等问题。为了解决这些问题,我们首次推出了一种新型碳涂层 Mn3O4/Na2CO3(Mn3O4/Na2CO3/C)复合材料。全面的特性分析表明,Na2CO3 能有效抑制 Mn 2+ 的溶解,在整个充电/放电循环过程中增强碳的包裹性,并在 Mn3O4/Na2CO3/C 复合材料上暴露出更多的活性位点。电化学评估证实,Mn3O4/Na2CO3/C-2 阴极具有优异的电化学性能,优于 ZnSO4 系统中的其他阴极。此外,在 2.0 M ZnSO4+0.2 MnSO4 电解质体系中,Mn3O4/Na2CO3/C-2 阴极在 0.1 A g -1 电流条件下可提供约 550 mAh g -1 的高比容量,在 1.0 A g -1 电流条件下循环 360 次后仍可保持约 230 mAh g -1 的显著容量,这表明它具有作为水性锌离子电池高性能阴极材料的潜力。
期刊介绍:
Chemistry—An Asian Journal is an international high-impact journal for chemistry in its broadest sense. The journal covers all aspects of chemistry from biochemistry through organic and inorganic chemistry to physical chemistry, including interdisciplinary topics.
Chemistry—An Asian Journal publishes Full Papers, Communications, and Focus Reviews.
A professional editorial team headed by Dr. Theresa Kueckmann and an Editorial Board (headed by Professor Susumu Kitagawa) ensure the highest quality of the peer-review process, the contents and the production of the journal.
Chemistry—An Asian Journal is published on behalf of the Asian Chemical Editorial Society (ACES), an association of numerous Asian chemical societies, and supported by the Gesellschaft Deutscher Chemiker (GDCh, German Chemical Society), ChemPubSoc Europe, and the Federation of Asian Chemical Societies (FACS).