Microwave-Assisted Synthesis of NiMn2O4 Grown on Nickel Foam as Electrode Material for High-Performance Supercapacitors,ChemistrySelect

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Microwave-Assisted Synthesis of NiMn2O4 Grown on Nickel Foam as Electrode Material for High-Performance Supercapacitors
ChemistrySelect ( IF 1.9 ) Pub Date : 2021-06-14 , DOI: 10.1002/slct.202100895
Xiaomei Du ₁ , Liu Yang ₁ , Yingqing Fu ₁ , Sen Liu ₁ , Naibao Huang ₁ , Shusen Wang ₂

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The spinel NiMn₂O₄ has been directly grown on 3D nickel foam by combining a simple microwave-assisted hydrothermal with annealing process at different temperatures (350 °C to 650 °C), which can be used as a binder-free electrode for high-performance supercapacitors. The results indicate that the pure NiMn₂O₄ can be obtained below 550 °C. The as-prepared NiMn₂O₄ at 450 °C has the largest specific capacitance of 802 F g⁻¹ at 1 A g⁻¹ and excellent cycle stability (61 % capacity retention after 5000 cycles at 10 A g⁻¹) among all the obtained samples. This outstanding electrochemical performance may be attributed to its relatively large grain size, high specific surface area, and appropriate pore structure. This indicates that NiMn₂O₄ grown on nickel foam shows great potential as an electrode material for supercapacitors.

中文翻译：

微波辅助合成在镍泡沫上生长的 NiMn2O4 作为高性能超级电容器的电极材料

尖晶石 NiMn ₂ O ₄通过将简单的微波辅助水热与不同温度（350°C 至 650°C）下的退火工艺相结合，直接在 3D 泡沫镍上生长，可用作无粘合剂电极，用于高- 高性能超级电容器。结果表明，在550℃以下可以得到纯NiMn ₂ O ₄。所制备的NiMn ₂ ö ₄在450℃下具有802 F G最大比电容^-1 1 A G ^-1以10 A G 5000次循环后和优异的循环稳定性（61％的容量保持率^-1) 在所有获得的样本中。这种优异的电化学性能可能归因于其相对较大的晶粒尺寸、高比表面积和适当的孔隙结构。这表明在泡沫镍上生长的NiMn ₂ O ₄作为超级电容器的电极材料显示出巨大的潜力。

更新日期：2021-06-15

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