{"title":"Bamboo-Based Carbon Fiber/Carbon Nanosheet Composite Flexible Supercapacitor","authors":"Kezheng Gao, Manpeng Qi, Zihao Chen, Qingyuan Niu, Qiheng Tang, Xiankai Sun, Lizhen Wang","doi":"10.1002/cnma.202500037","DOIUrl":null,"url":null,"abstract":"<p>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<sup>−1</sup> at a current density of 0.25 A g<sup>−1</sup>. 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/H<sub>3</sub>PO<sub>4</sub> 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<sup>−2</sup> at a current density of 5 μA cm<sup>−2</sup> and retains 0.99 mF cm<sup>−2</sup> even at 200 μA cm<sup>−2</sup>. 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.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 6","pages":""},"PeriodicalIF":2.6000,"publicationDate":"2025-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ChemNanoMat","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/cnma.202500037","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
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.
ChemNanoMatEnergy-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.