Effect of hydrothermal temperature variation on electrochemical performance of manganese oxide thin films for supercapacitor application

IF 1.9 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
R B Patil, A D Yadav, R Gurav, A S Patil, S S Mali, S M Pawar, S P Patil
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Abstract

In the present work, α-MnO2 thin films are deposited on a stainless steel substrate using the hydrothermal method by varying hydrothermal temperature. The impact of different hydrothermal temperatures on the structural, morphological and electrochemical performance of prepared thin films is investigated. The XRD studies confirm the tetragonal crystal structure of prepared MnO2 thin films. The electrochemical behaviour was studied using three-electrode system in 1 M KOH electrolyte. The high electrochemical performance with a maximum specific capacitance of 442 F g−1 at a scan rate 5 mV s−1 and energy density of 62 Wh kg−1 at a power density of 5.2 kW kg−1 has been obtained. The specific capacitance shows 90% capacitance retention after 2000 GCD cycles.

Abstract Image

Abstract Image

水热温度变化对超级电容器用氧化锰薄膜电化学性能的影响
本研究采用水热法,通过改变水热温度在不锈钢基底上沉积了 α-MnO2 薄膜。研究了不同水热温度对所制备薄膜的结构、形态和电化学性能的影响。XRD 研究证实制备的 MnO2 薄膜具有四方晶体结构。在 1 M KOH 电解液中使用三电极系统对电化学行为进行了研究。结果表明,在扫描速率为 5 mV s-1 时,该薄膜具有很高的电化学性能,最大比电容为 442 F g-1;在功率密度为 5.2 kW kg-1 时,能量密度为 62 Wh kg-1。在 2000 次 GCD 循环后,比电容保持率为 90%。
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来源期刊
Bulletin of Materials Science
Bulletin of Materials Science 工程技术-材料科学:综合
CiteScore
3.40
自引率
5.60%
发文量
209
审稿时长
11.5 months
期刊介绍: The Bulletin of Materials Science is a bi-monthly journal being published by the Indian Academy of Sciences in collaboration with the Materials Research Society of India and the Indian National Science Academy. The journal publishes original research articles, review articles and rapid communications in all areas of materials science. The journal also publishes from time to time important Conference Symposia/ Proceedings which are of interest to materials scientists. It has an International Advisory Editorial Board and an Editorial Committee. The Bulletin accords high importance to the quality of articles published and to keep at a minimum the processing time of papers submitted for publication.
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