Hydrothermal-deposition synthesis of MnO2/MnS nanorods as high-performance asymmetric supercapacitor positive electrode materials

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International Pub Date : 2024-10-01 DOI:10.1016/j.pnsc.2024.07.023

Ziming Wang , Hanbo Wang , Dongyu Pei , Sheng Wan , Yan Wang , Mingrui Yu , Haiyan Lu

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Abstract

Nanostructuring has shown promise in enhancing the performance of MnO₂ for energy storage in supercapacitors, highlighting its technological significance. This study introduces an innovative synthesis method, employing hydrothermal and constant-pressure deposition techniques, to produce nanostructured MnO₂/MnS rod electrodes on nickel foam. The roded heterostructure enhances specific surface area, conductivity, and symbiotic effect between MnO₂ and MnS. With optimized material and structural advantages, the electrode reaches a capacitance of 977.6 F g⁻¹ at 1 A g⁻¹, demonstrating extended cycling lifespan. Using MnO₂/MnS-5h rods as the positive electrode and activated carbon as the negative electrode, the supercapacitor achieves an energy density of 122.23 Wh kg⁻¹ at 898.75 W kg⁻¹. Notably, it maintains 91.55 % capacity retention after 5000 cycles at 10 A g⁻¹, indicating outstanding cycling stability. This research presents a promising solution for efficient energy storage, emphasizing the potential application of the developed MnO₂/MnS based supercapacitor in high-performance energy storage systems.

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水热沉积合成 MnO2/MnS 纳米棒作为高性能不对称超级电容器正极材料

纳米结构有望提高 MnO2 在超级电容器中的储能性能，凸显了其技术意义。本研究介绍了一种创新的合成方法，采用水热法和恒压沉积技术在泡沫镍上制备纳米结构的 MnO2/MnS 棒电极。棒状异质结构提高了比表面积、导电性以及 MnO2 和 MnS 之间的共生效应。凭借优化的材料和结构优势，该电极在 1 A g-1 电流条件下的电容达到了 977.6 F g-1，显示出更长的循环寿命。该超级电容器以 MnO2/MnS-5h 棒为正极，以活性炭为负极，在 898.75 W kg-1 的条件下实现了 122.23 Wh kg-1 的能量密度。值得注意的是，在 10 A g-1 的条件下循环 5000 次后，它仍能保持 91.55 % 的容量，显示出出色的循环稳定性。这项研究为高效储能提供了一种前景广阔的解决方案，强调了所开发的基于 MnO2/MnS 的超级电容器在高性能储能系统中的潜在应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Progress in Natural Science: Materials International 综合性期刊-综合性期刊

CiteScore

8.60

自引率

2.10%

发文量

2812

审稿时长

49 days

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.