Symmetric supercapacitors composed of ternary metal oxides (NiO/V2O5/ MnO2) nanoribbon electrodes with high energy storage performance
Symmetric supercapacitors composed of ternary metal oxides (NiO/V2O5/ MnO2) nanoribbon electrodes with high energy storage performance
复制标题
具有高储能性能的三元金属氧化物（NiO/V2O5/MnO2）纳米带电极组成的对称超级电容器
DOI：
10.1016/j.cej.2021.131804
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发表时间：
2021
影响因子：
15.1
通讯作者：
Liu Jingbo Louise
中科院分区：
文献类型：
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作者：
Wang Jing;Zheng Feng;Yu Yi;Hu Pengfei;Li Mingjun;Wang Jiao;Fu Jifang;Zhen Qiang;Bashir Sajid;Liu Jingbo Louise
制造具有改进的比电容、长循环寿命、高功率密度和能量密度的超级电容器以缩小传统能量存储与新兴能量存储之间的差距。我们开发了用于组装对称超级电容器的交互式三元金属氧化物纳米带电极。有序排列的钒氧化物带状阵列作为基体，从氧化镍/镍基体上生长，然后被锰氧化物纳米颗粒接枝。这些三金属氧化物是在具有成本效益和绿色水热化学中形成的。由带状阵列组成的电极在充电和放电过程中保持其晶体结构，在10，000次循环后能够保持83.6%的稳定性。这些制备好的电极在5 mV s-1下的比电容为788 F g-1。对称超级电容器使用三分量电极组装，在450 W kg−1的功率密度下实现138 W h kg− 1的高能量密度。这些无粘结剂的单电池设备的报告与一个简化的设计，显示10-20倍的能量密度相比，V2 O 5-MnO 2系统的报告结果。纳米接枝导致具有互穿通道的反应界面，用于有效的离子传输和电子传导。设计纳米结构超级电容器材料的进展是基于这些异质结阵列来增强其超级电容性能。
Supercapacitors with improved specific capacitance, long cycling life, high power density and energy density are fabricated to close the gap between traditional and emerging energy storage. We develop interactive ternary metal oxides nano-ribbon electrodes used to assemble symmetric supercapacitor. The well-aligned vanadium oxide ribbon arrays act as the matrix, growing from nickel oxide/nickel substrate and then being grafted by manganese oxide nanoparticles. These tri-metallic oxides are formed in a cost-effective and green hydrothermal chemistry. The electrodes composed of ribbon arrays retain their crystallographic structure during charging and discharging processes, enabling steadiness at 83.6 % after 10,000 cycles. These as-prepared electrodes demonstrate a specific capacitance of 788 F g−1at 5 mV s−1. The symmetrical supercapacitors are assembled using triple component electrodes, achieving a high energy density of 138 W h kg−1at a power density of 450 W kg−1. These binderless single-cell devices are reported with a simplified design showing 10–20 times higher energy density in comparison with reported results of the V2O5-MnO2system. The nanografting results in reactive interfaces with interpenetrating channels for efficient ion transport and electron conduction. The advances to design nanostructured supercapacitor materials are based on these heterojunction arrays to enhance their supercapacitive performances.