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

机译:外部磁场对纳米多孔镍储能电化学电容的影响

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摘要

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.
机译:这项工作研究了磁场对纳米多孔镍(np-Ni)电化学性能的影响。我们首先比较np-Ni电极的电化学电容,这些电极是使用化学脱合金策略在不同的磁通密度(B = 0,500 mT)下制备的。我们的实验数据表明,与不施加磁场的情况相比,在500 mT的外部磁场下制备的np-Ni500具有更好的电化学性能。此外,当我们将磁通密度从0 T增加到500 mT时,可以进一步增强np-Ni0电极的比电容,而np-Ni500电极在不同磁通密度下(B = 0 mT)表现出稳定的电化学性能。 ,300 mT,500 mT)。这可以归因于由外部磁场引起的np-Ni0电极的电化学阻抗的变化。因此,我们的工作提供了一种替代方法来增强材料的电化学能量存储。

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