Transition metal layered double hydroxides (LDHs) with amazing theoretical capacitance have caused remarkable interest as a potential supercapacitor electrode materials. However, the exerted low performance limits their further application. Nano-engineering technology was considered to be an effective strategy to further expose the pseudocapacitive properties of materials. Here, an ordered NiV LDHs@P-NF nanoarray was successfully constructed via phosphorized pretreatment and hydrothermal growth method. The as prepared NiV LDHs@P-NF electrode delivers an areal capacitance of 2.85 F cm⁻² at the current density of 20 mA cm⁻² and rarely decrease capacitance after over 5000 cycles at 50 mA cm⁻². Furthermore, the asymmetric supercapacitor assembled with prepared NiV LDHs@P-NF as the positive electrode and activated carbon as the negative electrode was found to show a maximum energy density of 0.202 mWh cm⁻² under a power density of 7.022 mW cm⁻². This work suggests that the NiV LDHs@P-NF nano-arrays electrode can be regard as the remarkable candidate to improve the performance of the asymmetric supercapacitor.

具有惊人的理论电容的过渡金属层状双氢氧化物（LDHs）作为潜在的超级电容器电极材料引起了人们的极大兴趣。然而，所施加的低性能限制了它们的进一步应用。纳米工程技术被认为是进一步暴露材料的伪电容特性的有效策略。在这里，通过磷化预处理和水热生长方法成功地构建了有序的NiV LDHs @ P-NF纳米阵列。所制备的NiV LDHs @ P-NF电极在20 mA cm ^-2的电流密度下提供2.85 F cm ^-2的面电容，并且在50 mA cm ^-2的超过5000次循环后很少减小电容。此外，制备水滑石的NiV组装@ P-NF作为正极和活性炭作为负极不对称超级电容器被发现显示出0.202 mWh的厘米的最大能量密度^-2 7.022毫瓦厘米的功率密度下^-2。这项工作表明，NiV LDHs @ P-NF纳米阵列电极可被视为改善不对称超级电容器性能的杰出候选者。