Bimetallic-MOF Derived Accordion-like Ternary Composite for High-Performance Supercapacitors,Inorganic Chemistry

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Bimetallic-MOF Derived Accordion-like Ternary Composite for High-Performance Supercapacitors
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2018-08-23 00:00:00 , DOI: 10.1021/acs.inorgchem.8b01574
Hao Mei ₁ , Yingjie Mei ₁ , Shiyu Zhang ₁ , Zhenyu Xiao ₂ , Ben Xu ₁ , Haobing Zhang ₁ , Lili Fan ₁ , Zhaodi Huang ₁ , Wenpei Kang ₁ , Daofeng Sun ₁

Affiliation

Supercapacitors are regarded to be highly probable candidates for next-generation energy storage devices. Herein, a bimetallic Co/Ni MOF is used as a sacrificial template through an alkaline hydrolysis and selective oxidation process to prepare an accordion-like ternary NiCo₂O₄/β-Ni_xCo_1–x(OH)₂/α-Ni_xCo_1–x(OH)₂ composite, which is composed of Co/Ni(OH)₂ nanosheets with large specific surface as the frame and NiCo₂O₄ nanoparticles with high conductivity as the insertion, for supercapacitor application. This material exhibits both high specific capacitance (1315 F·g^–1 at 5 A·g^–1) and excellent cycle performance (retained 90.7% after 10 000 cycles). This hydrolysis–oxidation process, alkali hydrolysis followed by oxidation with H₂O₂, offers a novel approach to fabricate the Ni/Co-based electrode materials with enhanced supercapacitor performance.

中文翻译：

用于高性能超级电容器的双金属-MOF衍生的手风琴状三元复合材料

超级电容器被认为是下一代储能设备的极有可能的候选者。这里，双金属钴/镍MOF被用作牺牲模板通过碱性水解和选择性氧化工艺，以制备类似手风琴的三元镍钴₂ ö ₄ /β-Ni系_X钴_{1- X}（OH）₂ /α-Ni系_x Co _{1– x}（OH）₂复合材料，由具有较大比表面的Co / Ni（OH）₂纳米片和NiCo ₂ O _4组成具有高电导率的纳米粒子作为插入物，用于超级电容器。这种材料既显示出高的比电容（在5 A ·g ^–1时为1315 F·g ^–1），又具有出色的循环性能（在1万次循环后保持90.7％的循环性能）。这种水解-氧化过程，先进行碱水解再用H ₂ O ₂氧化，提供了一种新颖的方法来制造具有增强的超级电容器性能的Ni / Co基电极材料。

更新日期：2018-08-23

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