A flexible carbon nanotube//zinc based aqueous zinc ion hybrid micro-supercapacitor with wide voltage window

IF 5.5 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta Pub Date : 2025-03-18 DOI:10.1016/j.electacta.2025.146074

Xingxing Li , Xin Zhou , Guosheng Li , Zilong Wang , Chuankun Zhang , Yuemin Wu , Bo Zhu

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Abstract

Recently, in order to satisfy the fast development of micro-supercapacitors that require both with excellent energy density and power density, zinc ion hybrid capacitors have garnered significant attention. Herein, a novel configuration of zinc-ion hybrid micro-supercapacitor with good mechanical flexibility has been assembled via carboxylated carbon nanotube (CNT) capacitor-type cathode and electrodeposited zinc (Zn) battery-type anode. The device demonstrates satisfying electrochemical characteristics, featuring an extensive operating voltage window of 1.8 V, and achieving a large areal capacity of 73 mF/cm² under 0.34 mA/cm². Additionally, it also displays excellent flexibility, good electrochemical stability with 85% capacitance retention rate and approximately 100% coulombic efficiency even under 5000 charging-discharging cycles. This work sheds light on the device design for Zn²⁺ storage, enabling the improvement of promising portable energy storage electronics.

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近来，为了满足微型超级电容器快速发展的需要，使其具有优异的能量密度和功率密度，锌离子混合电容器受到了广泛关注。本文通过羧基碳纳米管（CNT）电容器型阴极和电沉积锌（Zn）电池型阳极，组装了一种具有良好机械灵活性的新型锌离子混合微型超级电容器。该器件表现出令人满意的电化学特性，具有 1.8 V 的宽工作电压窗口，在 0.34 mA/cm2 的条件下实现了 73 mF/cm2 的大面积容量。此外，它还具有出色的灵活性和良好的电化学稳定性，即使在 5000 次充放电循环下，电容保持率仍高达 85%，库仑效率约为 100%。这项研究为 Zn2+ 存储的器件设计提供了启示，有助于改进前景广阔的便携式储能电子器件。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Electrochimica Acta 工程技术-电化学

CiteScore

11.30

自引率

6.10%

发文量

1634

审稿时长

41 days

期刊介绍： Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.