Bamboo-Based Carbon Fiber/Carbon Nanosheet Composite Flexible Supercapacitor

IF 2.6 4区 材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY
ChemNanoMat Pub Date : 2025-05-04 DOI:10.1002/cnma.202500037
Kezheng Gao, Manpeng Qi, Zihao Chen, Qingyuan Niu, Qiheng Tang, Xiankai Sun, Lizhen Wang
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引用次数: 0

Abstract

The primary factors affecting the performance of supercapacitors are ion diffusion, storage, and electron conduction. A unique composite structure combining elongated carbon fibers and void-filling carbon nanosheets can simultaneously enhance ion diffusion, storage, and charge conduction. Herein, bamboo fibers treated with delignification are used as raw materials. Through a simple chemical delignification process, followed by compression into sheets and carbonization, elongated carbon fiber/carbon nanosheet composite structures are prepared. Supercapacitors made with symmetric electrodes from these bamboo-based composite materials exhibit a specific capacitance of 97.2 F g−1 at a current density of 0.25 A g−1. The bamboo-based composite sheets demonstrate excellent flexibility and conductivity due to the stacking of carbon fibers and carbon nanosheets, forming abundant layered voids and a 3D network structure. This layered 3D network structure endows the PVA/H3PO4 gel electrolyte with excellent permeability. The bamboo-based carbon fiber/carbon nanosheet composite interdigitated flexible solid-state supercapacitor achieves an areal capacitance of 10.59 mF cm−2 at a current density of 5 μA cm−2 and retains 0.99 mF cm−2 even at 200 μA cm−2. After undergoing various folding angles and 200 folds, the CV curves of the interdigitated flexible solid-state supercapacitor show minimal changes in shape and enclosed area, demonstrating excellent flexibility and folding durability.

竹基碳纤维/碳纳米片复合柔性超级电容器
影响超级电容器性能的主要因素是离子扩散、存储和电子传导。一种独特的复合结构结合了细长碳纤维和空隙填充碳纳米片,可以同时增强离子的扩散、储存和电荷传导。本文以经脱木质素处理的竹纤维为原料。通过简单的化学脱木质素过程,然后压缩成片和碳化,制备了细长碳纤维/碳纳米片复合结构。用这些竹基复合材料制成的对称电极制成的超级电容器在0.25 a g−1电流密度下的比电容为97.2 F g−1。竹基复合材料由于碳纤维和碳纳米片的堆叠,形成丰富的层状空隙和三维网络结构,表现出优异的柔韧性和导电性。这种层状三维网络结构使PVA/H3PO4凝胶电解质具有优异的渗透性。竹基碳纤维/碳纳米片复合交叉指状柔性固态超级电容器在电流密度为5 μA cm−2时的面电容为10.59 mF cm−2,在电流密度为200 μA cm−2时仍保持0.99 mF cm−2。经过各种折叠角度和200次折叠后,交叉柔性固态超级电容器的CV曲线形状和封闭面积变化最小,具有优异的柔性和折叠耐久性。
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
ChemNanoMat
ChemNanoMat Energy-Energy Engineering and Power Technology
CiteScore
6.10
自引率
2.60%
发文量
236
期刊介绍: ChemNanoMat is a new journal published in close cooperation with the teams of Angewandte Chemie and Advanced Materials, and is the new sister journal to Chemistry—An Asian Journal.
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