Hydrothermal preparation of porous NiO nanoflake arrays@V2O5 nanoparticles composite for high performance supercapacitive electrode material
Hydrothermal preparation of porous NiO nanoflake arrays@V2O5 nanoparticles composite for high performance supercapacitive electrode material
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DOI：
10.1016/j.jallcom.2023.172955
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发表时间：
2023-11
影响因子：
6.2
通讯作者：
Jiao Wang;F. Zheng;Donghua Jia;Yaxuan Li;Yingying Niu;Xiaodong Mao;Qiang Zhen;Yitong Yu
中科院分区：
文献类型：
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作者：
Jiao Wang;F. Zheng;Donghua Jia;Yaxuan Li;Yingying Niu;Xiaodong Mao;Qiang Zhen;Yitong Yu
本文采用水热法在泡沫镍基体上制备了多孔NiO纳米片阵列@V2O5纳米颗粒（PNFAs@VNPs）复合材料。PNFAs@VNPs复合材料具有有序的阵列结构、大的活性表面和良好的物理稳定性。基于CV曲线，比电容可以达到950 F g− 1，并在5000次循环后保持稳定在原始值的95.8%。当PNFAs@VNPs复合材料组装成对称超级电容器时，在550 W kg−1的功率密度下，能量密度可达到67.0 W h kg− 1。即使功率密度上升到11，000 W kg−1，能量密度仍然可以保持在25.3 W h kg−1。PNFAs@VNPs复合材料的高超级电容性能归因于PNFAs和VNPs的协同作用。PNFAs@VNPs复合材料兼具电池型和电容型赝电容的优点，具有较高的电荷转移动力学，是一种潜在的超级电容电极材料。
In this paper, porous NiO nanoflake arrays@V2O5nanoparticles (PNFAs@VNPs) composite is fabricated on Ni foam through a facile hydrothermal process. The PNFAs@VNPs composite has an ordered array structure, a large active surface, and favorable physical stability. Based on the CV profile, the specific capacitance can achieve 950 F g−1and remain stable at 95.8 % of the original value after 5000 loops. When the PNFAs@VNPs composite is assembled into a symmetric supercapacitor, the energy density can reach 67.0 W h kg−1at a power density of 550 W kg−1. Even if the power density rises to 11,000 W kg−1, the energy density can still be held at 25.3 W h kg−1. The high supercapacitive property of the PNFAs@VNPs composite is owed to the synergic action of the PNFAs and VNPs. The PNFAs@VNPs composite with the advantages of battery-type and capacitive-type pseudocapacitances has higher charge transfer dynamics, making it a potential supercapacitive electrode material.