Benzoate anions-intercalated cobalt-nickel layered hydroxide nanobelts as high-performance electrode materials for aqueous hybrid supercapacitors
Benzoate anions-intercalated cobalt-nickel layered hydroxide nanobelts as high-performance electrode materials for aqueous hybrid supercapacitors
复制标题
苯甲酸阴离子插层钴镍层状氢氧化物纳米带作为水性混合超级电容器的高性能电极材料
DOI：
10.1016/j.jcis.2020.08.097
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发表时间：
2021-01-15
影响因子：
9.9
通讯作者：
Chen, Shaowei
中科院分区：
文献类型：
--
作者：
Li, Yang;Luo, Ziyang;Chen, Shaowei
层状金属氢氧化物盐（lhs）作为一种高效的超级电容器电极材料近年来得到了广泛的关注。本文首次报道了一种嵌有苯甲酸盐阴离子（b - coni -LHS）的钴-镍层杂化有机-无机LHS的合成，并观察到它作为杂化超级电容器（hsc）电极材料的高性能。采用共沉淀法，在不添加任何有机溶剂和表面活性剂的情况下，将苯甲酸钠滴入钴镍盐溶液中，合成了b - coni - lhs。由于阴离子的插入和多金属组分的协同作用，b - coni - lhs电极在1 a g（-1）时具有高达570 C g（-1）的高比容量（比电容为1267 f g(-1)），与单金属电极相比，具有优异的倍率性能（从1到10 a g（-1）为65%）和出色的循环性能（超过8000次循环81.09%）。以b - coni - lhs为正极，活性炭（AC）为负极组装的HSC器件，在能量密度为31.7 Wh kg（-1）时功率密度为780 W kg(-1)，在能量密度为18.1 Wh kg（-1）时功率密度为8543 W kg（-1）。本研究结果表明，层状双金属氢氧化物的有机-无机杂化物插入苯甲酸盐阴离子可能是高性能超导电极材料的可行候选材料。(C) 2020爱思唯尔公司版权所有。
Layered metal hydroxide salts (LHSs) have recently gained extensive interests as an efficient electrode material for supercapacitors (SCs). Herein, we report, for the first time ever, the synthesis of a cobalt-nickel layered hybrid organic-inorganic LHS that was intercalated with benzoate anions (B-CoNi-LHSs) and observe a high performance as electrode materials for hybrid supercapacitors (HSCs). B-CoNi-LHSs were synthesized by using a co-precipitation method, where sodium benzoate was added dropwise to cobalt and nickel salt solution, without the addition of any organic solvent or surfactant. Due to the intercalation of anions and synergistic interactions of the multi-metallic components, the B-CoNi-LHSs electrode showed a high specific capacity of 570 C g(-1) (specific capacitance of 1267 F.g(-1)) at 1 A g(-1), excellent rate performance (65% from 1 to 10 A g(-1)) and outstanding cycling performance (81.09% over 8000 cycles), in comparison to the mono-metallic counterparts. An HSC device, assembled by using B-CoNi-LHSs as the positive electrode and activated carbon (AC) as the negative one, exhibited a power density of 780 W kg(-1) at the energy density of 31.7 Wh kg(-1), and 8543 W kg(-1) at 18.1 Wh kg(-1). Results from this study show that the organic-inorganic hybrids of layered dual-metal hydroxides intercalated with benzoate anions may be a viable candidate as electrode materials for high-performance SCs. (C) 2020 Elsevier Inc. All rights reserved.