{"title":"Refinement of structural characteristics and supercapacitor performance of MnO2 nanosheets via CTAB-assisted electrodeposition","authors":"Ziming Wang, Hanbo Wang, Dongyu Pei, Sheng Wan, Zhitian Fan, Mingrui Yu, Haiyan Lu","doi":"10.1016/j.pnsc.2023.12.013","DOIUrl":null,"url":null,"abstract":"<p>MnO<sub>2</sub><span><span> stands out as a highly promising material for electrochemical capacitors due to its impressive theoretical capacitance, cost-effectiveness, eco-friendliness, and abundant natural availability. Yet, its inherent low conductivity and structural fragility result in restricted specific capacitance and a shortened cycle life, posing a notable obstacle to its advancement. Through the introduction of CTAB (cetyltrimethylammonium bromide), we successfully tailored the </span>surface morphology of the electrode material, yielding a robust and highly conductive layered MnO</span><sub>2</sub> electrode material. The MnO<sub>2</sub><span>/CTAB composite synthesized through a simple electrodeposition method exhibits outstanding performance, achieving a specific capacitance of 665 F g</span><sup>−1</sup> at 1 A g<sup>−1</sup>. Even after 30,000 cycles, it maintains 92.13% capacitance. The performance improvement is primarily attributed to increased conductivity, and additional electrochemically active sites. Additionally, the assembled MnO<sub>2</sub>/CTAB//AC capacitor (ACs) achieves a specific capacitance of 70.06 F g<sup>−1</sup> at 1 A g<sup>−1</sup>, operating at a voltage of 1.8 V. At a power density of 563.36 W kg<sup>-1</sup><span>, it reaches an energy density of 35.21 Wh kg</span><sup>-1</sup><span>. This work provides an effective approach for high-performance electrode of supercapacitor.</span></p>","PeriodicalId":20742,"journal":{"name":"Progress in Natural Science: Materials International","volume":null,"pages":null},"PeriodicalIF":4.8000,"publicationDate":"2024-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Progress in Natural Science: Materials International","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1016/j.pnsc.2023.12.013","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
MnO2 stands out as a highly promising material for electrochemical capacitors due to its impressive theoretical capacitance, cost-effectiveness, eco-friendliness, and abundant natural availability. Yet, its inherent low conductivity and structural fragility result in restricted specific capacitance and a shortened cycle life, posing a notable obstacle to its advancement. Through the introduction of CTAB (cetyltrimethylammonium bromide), we successfully tailored the surface morphology of the electrode material, yielding a robust and highly conductive layered MnO2 electrode material. The MnO2/CTAB composite synthesized through a simple electrodeposition method exhibits outstanding performance, achieving a specific capacitance of 665 F g−1 at 1 A g−1. Even after 30,000 cycles, it maintains 92.13% capacitance. The performance improvement is primarily attributed to increased conductivity, and additional electrochemically active sites. Additionally, the assembled MnO2/CTAB//AC capacitor (ACs) achieves a specific capacitance of 70.06 F g−1 at 1 A g−1, operating at a voltage of 1.8 V. At a power density of 563.36 W kg-1, it reaches an energy density of 35.21 Wh kg-1. This work provides an effective approach for high-performance electrode of supercapacitor.
期刊介绍:
Progress in Natural Science: Materials International provides scientists and engineers throughout the world with a central vehicle for the exchange and dissemination of basic theoretical studies and applied research of advanced materials. The emphasis is placed on original research, both analytical and experimental, which is of permanent interest to engineers and scientists, covering all aspects of new materials and technologies, such as, energy and environmental materials; advanced structural materials; advanced transportation materials, functional and electronic materials; nano-scale and amorphous materials; health and biological materials; materials modeling and simulation; materials characterization; and so on. The latest research achievements and innovative papers in basic theoretical studies and applied research of material science will be carefully selected and promptly reported. Thus, the aim of this Journal is to serve the global materials science and technology community with the latest research findings.
As a service to readers, an international bibliography of recent publications in advanced materials is published bimonthly.