Electrostatically assembled nanoflower-like MXene/NiCu-layered double hydroxide composite thin-film: A high capacitive energy storage for flexible supercapacitors
{"title":"Electrostatically assembled nanoflower-like MXene/NiCu-layered double hydroxide composite thin-film: A high capacitive energy storage for flexible supercapacitors","authors":"","doi":"10.1016/j.surfin.2024.105070","DOIUrl":null,"url":null,"abstract":"<div><p>Advancements in wearable electronic devices, including electronic skins, flexible displays, and soft robots have driven the development of high-performance flexible supercapacitors (SC). MXene, one of the most promising energy storage materials, has attracted widespread attention due to its unique two-dimensional structure, high electrical conductivity, and rich surface functional groups. However, nanosheet restacking limits the improvement in the capacitance performance of MXene films. This study develops a novel approach to self-assemble MXene and NiCu-layered double hydroxide composite films, which significantly enhance the electrochemical performance of the MXene films, mitigating the inherent aggregation and enhancing the capacitance. The composite exhibits a mass-specific capacitance of 556.4 F <em>g</em><sup>−1</sup> at a current density of 1 A <em>g</em><sup>−1</sup>. Moreover, at a current density of 1 A <em>g</em><sup>−1</sup>, the study demonstrates an energy density of 12.4 Wh kg<sup>−1</sup> and a power density of 500 W kg<sup>−1</sup> when the composite with TNC-2 is used as both positive and negative electrodes. The capacitance retention rate remains at 90 % after 5,000 cycles at 10 A <em>g</em><sup>−1</sup>, indicating excellent long-term performance. This study provides new insights into the development of self-supporting flexible thin-film electrodes for high-performance SC devices.</p></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":null,"pages":null},"PeriodicalIF":5.7000,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Surfaces and Interfaces","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2468023024012264","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Advancements in wearable electronic devices, including electronic skins, flexible displays, and soft robots have driven the development of high-performance flexible supercapacitors (SC). MXene, one of the most promising energy storage materials, has attracted widespread attention due to its unique two-dimensional structure, high electrical conductivity, and rich surface functional groups. However, nanosheet restacking limits the improvement in the capacitance performance of MXene films. This study develops a novel approach to self-assemble MXene and NiCu-layered double hydroxide composite films, which significantly enhance the electrochemical performance of the MXene films, mitigating the inherent aggregation and enhancing the capacitance. The composite exhibits a mass-specific capacitance of 556.4 F g−1 at a current density of 1 A g−1. Moreover, at a current density of 1 A g−1, the study demonstrates an energy density of 12.4 Wh kg−1 and a power density of 500 W kg−1 when the composite with TNC-2 is used as both positive and negative electrodes. The capacitance retention rate remains at 90 % after 5,000 cycles at 10 A g−1, indicating excellent long-term performance. This study provides new insights into the development of self-supporting flexible thin-film electrodes for high-performance SC devices.
期刊介绍:
The aim of the journal is to provide a respectful outlet for ''sound science'' papers in all research areas on surfaces and interfaces. We define sound science papers as papers that describe new and well-executed research, but that do not necessarily provide brand new insights or are merely a description of research results.
Surfaces and Interfaces publishes research papers in all fields of surface science which may not always find the right home on first submission to our Elsevier sister journals (Applied Surface, Surface and Coatings Technology, Thin Solid Films)