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Preparation of Flexible Substrate Electrode for Supercapacitor With High-Performance MnO₂ Stalagmite Nanorod Arrays.

ABSTRACT: A large-area MnO₂ stalagmite nanorod arrays (SNAs) growing vertically on flexible substrates were successfully fabricated by an easy heat-electrodeposition method. The large specific capacitance (646.4 F g^-1 at 500 mA g^-1) and excellent rate capability (42.3% retention with 40 times of increase) indicate that the prepared MnO₂ SNAs flexible electrode has outstanding electrochemical performance. Furthermore, after 5,000 repetitions of CV tests, the overall specific capacitance could retain ~101.2% compared with the initial value meant a long cycling life. These outstanding properties could be ascribed to the effective conductive transport path between Ni substrate and MnO₂ nanorods, and owing to the stalagmite like structure of MnO₂ nanorods, the exposed sufficient active sites are beneficial to the electrolyte infiltration.

SUBMITTER: Ge Y

PROVIDER: S-EPMC6527770 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature

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Preparation of Flexible Substrate Electrode for Supercapacitor With High-Performance MnO2 Stalagmite Nanorod Arrays.

Ge Yuanyu Y Wang Xianfeng X Zhao Tao T

Frontiers in chemistry 20190514

A large-area MnO2 stalagmite nanorod arrays (SNAs) growing vertically on flexible substrates were successfully fabricated by an easy heat-electrodeposition method. The large specific capacitance (646.4 F g-1 at 500 mA g-1) and excellent rate capability (42.3% retention with 40 times of increase) indicate that the prepared MnO2 SNAs flexible electrode has outstanding electrochemical performance. Furthermore, after 5,000 repetitions of CV tests, the over ...[more]

PMID: 31139621

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