Influence of molar concentration on the morphology and electrochemical performance of binder-free Mn3O4 thin films in aqueous symmetrical supercapacitors

IF 5.4 3区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR Inorganic Chemistry Communications Pub Date : 2025-02-25 DOI:10.1016/j.inoche.2025.114207

P.S. Naik , R.S. Redekar , J.V. Kamble , S.V. Sadavar , N.L. Tarwal , S.-Y. Lee , S.J. Park , M.M. Karanjkar , P.D. Kamble

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Abstract

The current study reports a cost-effective hydrothermal method for binder-less synthesis of manganese oxide (Mn₃O₄) nanostructures on flexible stainless steel (SS) substrates, expected to enhance electrochemical performance for supercapacitor (SC) applications. By optimizing Mn molar concentrations, the Mn₃O₄ film (MO) with a 3 M concentration formed a porous structure with cauliflower-like morphology, beneficial for energy storage in aqueous electrolytes. Physicochemical characterization is used for the analysis of the MO samples. The electrode MO-0.3 exhibited a specific capacity of 1211C g⁻¹ at 0.99 A g⁻¹. An aqueous symmetric device (MO-0.3//KOH//MO-0.3 ASD) demonstrated a specific capacitance of 120.23F g⁻¹, a specific energy of 16.77 Wh kg⁻¹, and a specific power of 247.52 W kg⁻¹, with ∽89 % capacitance retention after 5000 cycles. These findings underscore the potential of MO electrodes for high-performance electrochemical energy storage, showcasing the efficacy of this material in supercapacitor applications.

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摩尔浓度对水性对称超级电容器中无粘结剂Mn3O4薄膜形貌和电化学性能的影响

目前的研究报告了一种在柔性不锈钢（SS）衬底上无粘结剂合成氧化锰（Mn3O4）纳米结构的经济高效的水热方法，有望提高超级电容器（SC）应用的电化学性能。通过优化Mn的摩尔浓度，得到了3 M浓度的Mn3O4膜（MO），形成了菜花状的多孔结构，有利于在水溶液中储能。物理化学表征用于MO样品的分析。MO-0.3电极在0.99 a g−1时的比容量为1211C g−1。该装置（MO-0.3//KOH//MO-0.3 ASD）的比电容为120.23F g−1，比能量为16.77 Wh kg−1，比功率为247.52 W kg−1，循环5000次后电容保持率为89%。这些发现强调了MO电极在高性能电化学储能方面的潜力，展示了这种材料在超级电容器应用中的功效。

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来源期刊

Inorganic Chemistry Communications 化学-无机化学与核化学

CiteScore

5.50

自引率

7.90%

发文量

1013

审稿时长

53 days

期刊介绍： Launched in January 1998, Inorganic Chemistry Communications is an international journal dedicated to the rapid publication of short communications in the major areas of inorganic, organometallic and supramolecular chemistry. Topics include synthetic and reaction chemistry, kinetics and mechanisms of reactions, bioinorganic chemistry, photochemistry and the use of metal and organometallic compounds in stoichiometric and catalytic synthesis or organic compounds.