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The Effect of an External Magnetic Field on the Electrochemical Capacitance of Nanoporous Nickel for Energy Storage

Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials and Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China
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Nanomaterials 2019, 9(5), 694; https://doi.org/10.3390/nano9050694
Received: 27 March 2019 / Revised: 25 April 2019 / Accepted: 28 April 2019 / Published: 4 May 2019
(This article belongs to the Special Issue Materials and Components for Electrochemical Storage Devices)
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Abstract

This work investigates the effect of a magnetic field on the electrochemical performance of nanoporous nickel (np-Ni). We first compare the electrochemical capacitance of np-Ni electrodes, which were prepared using the chemical dealloying strategy under different magnetic flux densities (B = 0, 500 mT). Our experimental data show that np-Ni500 prepared under an external magnetic field of 500 mT exhibits a much better electrochemical performance, in comparison with that (np-Ni0) prepared without applying a magnetic field. Furthermore, the specific capacitance of the np-Ni0 electrode could be further enhanced when we increase the magnetic flux densities from 0 T to 500 mT, whereas the np-Ni500 electrode exhibits a stable electrochemical performance under different magnetic flux densities (B = 0 mT, 300 mT, 500 mT). This could be attributed to the change in the electrochemical impedance of the np-Ni0 electrode induced by an external magnetic field. Our work thus offers an alternative method to enhance the electrochemical energy storage of materials. View Full-Text
Keywords: magnetic field; nanoporous nickel; specific capacitance; electrochemical energy storage magnetic field; nanoporous nickel; specific capacitance; electrochemical energy storage
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Zhang, H.; Han, Z.; Deng, Q. The Effect of an External Magnetic Field on the Electrochemical Capacitance of Nanoporous Nickel for Energy Storage. Nanomaterials 2019, 9, 694.

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