{"title":"将层状 MnO2@PDA 作为实现高性能锌离子水电池的阴极材料","authors":"","doi":"10.1016/j.est.2024.113962","DOIUrl":null,"url":null,"abstract":"<div><div>Aqueous zinc-ion batteries (AZIBs) can benefit from a deep understanding of the electrochemical reaction mechanism of cathode materials, which can assist in resolving issues such as cathode dissolution and electrostatic interactions. We reported a straightforward two-step synthesis of polydopamine coated MnO<sub>2</sub> (MnO<sub>2</sub>@PDA) and revealed the energy storage mechanisms in AZIBs. The layered structure of MnO<sub>2</sub> creates a generous passage for the insertion of H<sup>+</sup>/Zn<sup>2+</sup> ions. Simultaneously, the plethora of functional groups within PDA exerts a robust desolvation effect, bolstering the transfer rate of H<sup>+</sup>/Zn<sup>2+</sup>. This effect significantly enhances the overall efficiency and performance of cathode. The AZIBs, incorporating MnO<sub>2</sub>@PDA cathode material, consequently exhibit a satisfactory cycling capacity (412 mAh g<sup>−1</sup> at 0.1 A g<sup>−1</sup>) and a superb specific energy (561.6 Wh kg<sup>−1</sup> at 136.34 W kg<sup>−1</sup>). This work provides a new path for design strategies and catalytic mechanisms of MnO<sub>2</sub>@PDA cathode.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":null,"pages":null},"PeriodicalIF":8.9000,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Layered MnO2@PDA as cathode material toward high-performance aqueous zinc-ion batteries\",\"authors\":\"\",\"doi\":\"10.1016/j.est.2024.113962\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Aqueous zinc-ion batteries (AZIBs) can benefit from a deep understanding of the electrochemical reaction mechanism of cathode materials, which can assist in resolving issues such as cathode dissolution and electrostatic interactions. We reported a straightforward two-step synthesis of polydopamine coated MnO<sub>2</sub> (MnO<sub>2</sub>@PDA) and revealed the energy storage mechanisms in AZIBs. The layered structure of MnO<sub>2</sub> creates a generous passage for the insertion of H<sup>+</sup>/Zn<sup>2+</sup> ions. Simultaneously, the plethora of functional groups within PDA exerts a robust desolvation effect, bolstering the transfer rate of H<sup>+</sup>/Zn<sup>2+</sup>. This effect significantly enhances the overall efficiency and performance of cathode. The AZIBs, incorporating MnO<sub>2</sub>@PDA cathode material, consequently exhibit a satisfactory cycling capacity (412 mAh g<sup>−1</sup> at 0.1 A g<sup>−1</sup>) and a superb specific energy (561.6 Wh kg<sup>−1</sup> at 136.34 W kg<sup>−1</sup>). This work provides a new path for design strategies and catalytic mechanisms of MnO<sub>2</sub>@PDA cathode.</div></div>\",\"PeriodicalId\":15942,\"journal\":{\"name\":\"Journal of energy storage\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":8.9000,\"publicationDate\":\"2024-10-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of energy storage\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2352152X24035485\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENERGY & FUELS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of energy storage","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2352152X24035485","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0
摘要
深入了解阴极材料的电化学反应机理有助于解决阴极溶解和静电相互作用等问题,从而使锌离子水电池(AZIBs)从中受益。我们报道了两步直接合成聚多巴胺包覆二氧化锰(MnO2@PDA)的方法,并揭示了 AZIBs 的储能机制。MnO2 的层状结构为 H+/Zn2+ 离子的插入创造了宽敞的通道。同时,PDA 中的大量官能团发挥了强大的去溶胶效应,提高了 H+/Zn2+ 的转移率。这种效应大大提高了阴极的整体效率和性能。因此,含有 MnO2@PDA 阴极材料的 AZIB 具有令人满意的循环容量(0.1 A g-1 时为 412 mAh g-1)和极高的比能量(136.34 W kg-1 时为 561.6 Wh kg-1)。这项工作为 MnO2@PDA 阴极的设计策略和催化机理提供了一条新的途径。
Layered MnO2@PDA as cathode material toward high-performance aqueous zinc-ion batteries
Aqueous zinc-ion batteries (AZIBs) can benefit from a deep understanding of the electrochemical reaction mechanism of cathode materials, which can assist in resolving issues such as cathode dissolution and electrostatic interactions. We reported a straightforward two-step synthesis of polydopamine coated MnO2 (MnO2@PDA) and revealed the energy storage mechanisms in AZIBs. The layered structure of MnO2 creates a generous passage for the insertion of H+/Zn2+ ions. Simultaneously, the plethora of functional groups within PDA exerts a robust desolvation effect, bolstering the transfer rate of H+/Zn2+. This effect significantly enhances the overall efficiency and performance of cathode. The AZIBs, incorporating MnO2@PDA cathode material, consequently exhibit a satisfactory cycling capacity (412 mAh g−1 at 0.1 A g−1) and a superb specific energy (561.6 Wh kg−1 at 136.34 W kg−1). This work provides a new path for design strategies and catalytic mechanisms of MnO2@PDA cathode.
期刊介绍:
Journal of energy storage focusses on all aspects of energy storage, in particular systems integration, electric grid integration, modelling and analysis, novel energy storage technologies, sizing and management strategies, business models for operation of storage systems and energy storage developments worldwide.