Preparation of V2O5 nanobelt arrays/NiO nanosheet arrays composite as supercapacitor electrode material
Preparation of V2O5 nanobelt arrays/NiO nanosheet arrays composite as supercapacitor electrode material
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DOI：
10.1016/j.jallcom.2023.172283
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发表时间：
2023-09
影响因子：
6.2
通讯作者：
Donghua Jia;F. Zheng;Yingying Niu;Xiaodong Mao;Yuesen Yang;Qiang Zhen;Peng Li;Yitong Yu
中科院分区：
文献类型：
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作者：
Donghua Jia;F. Zheng;Yingying Niu;Xiaodong Mao;Yuesen Yang;Qiang Zhen;Peng Li;Yitong Yu
采用简单的水热法在泡沫镍上制备了V2 O 5纳米带阵列（VNBAs），然后采用简单的化学浴沉积法在VNBAs上生长了NiO纳米片阵列（NNSAs），形成VNBAs/NNSAs复合材料。研究发现，具有片层结构的单晶VNBA均匀分布在泡沫镍上，而具有紧密堆积结构的多晶NNSA紧密覆盖在VNBA上。采用CV、GCD、EIS和CA等电化学技术测试了VNBA/NNSA复合材料的超电容性能。单电极显示出875 F g-1的高比容量，96.1%的良好循环稳定性，1.32 Ω的小电荷转移电阻和2.5 × 10 - 8 cm 2s-1的快速离子扩散系数。由VNBA/NNSA组合的对称超级电容器在400 W kg− 1时显示出120.1 W h kg− 1的大能量密度，并且在8000 W kg−1时保持68.3 W h kg− 1。VNBAs/NNSAs复合材料具有良好的电化学性能，是一种很有潜力的超级电容器电极材料。
V2O5nanobelt arrays (VNBAs) is fabricated on Ni foam by using an easy hydrothermal route and then NiO nanosheet arrays (NNSAs) is grown on VNBAs by using a simple chemical bath deposition approach to form VNBAs/NNSAs composite. It is found that the monocrystalline VNBAs with a lamellar structure is uniformly distributed on nickel foam and the polystalline NNSAs with a close packed structure is closely covered on the VNBAs. CV, GCD, EIS and CA electrochemical techniques are used to test the supercapacitive properties of the VNBAs/NNSAs composite. The single electrode displays a high specific capacity of 875 F g−1, a good cycling stability of 96.1%, a small charge transfer resistance of 1.32 Ω and a rapid ion diffusivity of 2.5 × 10−8cm2s−1. The symmetric supercapacitor combined by the VNBAs/NNSAs displays a large energy density of 120.1 W h kg−1at 400 W kg−1and it retains 68.3 W h kg−1at 8000 W kg−1. The VNBAs/NNSAs composite with high electrochemical performance is a potential supercapacitor electrode material.