A flexible Zn-ion hybrid micro-supercapacitor based on MXene anode and V2O5 cathode with high capacitance
A flexible Zn-ion hybrid micro-supercapacitor based on MXene anode and V2O5 cathode with high capacitance
复制标题
一种基于MXene阳极和V2O5阴极的高电容柔性锌离子混合微型超级电容器
DOI：
10.1016/j.cej.2021.130965
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发表时间：
2021-07-10
影响因子：
15.1
通讯作者：
Gao, Yihua
中科院分区：
文献类型：
--
作者：
Li, Xingxing;Ma, Yanan;Gao, Yihua
近年来，由电池型法拉第阴极电极和电容型负极电极组成的金属离子混合型微型超级电容器(MSC)可以实现高功率和高能量密度，成为当今能源器件研究的热点之一。在这里，我们设计了一种锌离子混合型微型超级电容器(ZIHMSC)，设计了以Ti3C2Tx Mxene为正极，以V2O5为正极的电池型电极。此外，与其他基于有机电解液的混合型MSC不同，选择了溶解了ZnSO4的聚丙烯酰胺(PAM)水凝胶作为电解液，有效地避免了安全隐患。同时，柔性ZIHMSC也表现出良好的电化学性能，表现出显著的比容量(0.34 mA cm(-2)下的129 mF cm(-2))、高的能量密度(673 mW cm(-2)下的48.9 mW h cm(-2))和良好的循环稳定性(10,000次循环后的容量保持接近77%)。这项工作为构建新一代柔性微储能系统提供了一条可行的路线。
In recent years, the metal ion hybrid micro-supercapacitor (MSC) comprised of the battery-type Faradaic cathode based electrode and capacitor-type anode based electrode, can realize both high power and energy density, which becomes one of the most hottest areas of energy device. Herein, we demonstrated a zinc-ion hybrid micro-supercapacitor (ZIHMSC) by designing a Ti3C2Tx MXene based electrode as capacitor-type anode and vanadium pentoxide (V2O5) based electrode as battery-type cathode. In addition, the polyacrylamide (PAM) hydrogel where ZnSO4 dissolved was chosen as the electrolyte, which effectively avoids the security risks, unlike other hybrid MSC based on the organic electrolytes. Meanwhile, the flexible ZIHMSC also exhibits well electrochemical properties, displaying a remarkable capacitance (129 mF cm(-2) under 0.34 mA cm(-2)), high energy density (48.9 mu Wh cm(-2) at 673 mu W cm(-2)) and well-cycle stability (retaining similar to 77% capacitance after 10,000 cycles). This work supports a prospective routine for constructing the new-generation flexible micro-energy storage systems.