超级电容器
材料科学
纳米纤维
静电纺丝
纳米技术
电容
电极
化学工程
柔性电子器件
醋酸纤维素
碳纳米纤维
复合材料
纤维素
碳纳米管
聚合物
化学
物理化学
工程类
作者
Chunxia Yan,Jie Wang,Jie Gao,Ziqiang Shao,Shanshan Lv
出处
期刊:Carbon
[Elsevier]
日期:2023-09-01
卷期号:213: 118187-118187
被引量:5
标识
DOI:10.1016/j.carbon.2023.118187
摘要
Flexible electrode materials have achieved great breakthroughs during the past decades. However, many challenges remain such as how to overcome the frangibility and enhance the flexibility, and advance the high specific capacitance. We fabricated a free-standing, foldable, and conductive cellulose acetate (CA)-based metal-organic framework (MOF) composites by facile electrospinning carbonization and co-precipitation method. The sustainable cellulose derivative provides a flexible matrix, which contains hierarchically porous and ample redox activities. The intermolecular interaction is enhanced for coordination between exposed hydroxyl on deacetylated CA and metal ions, thus reduce the fracture of the CA nanofibers. Importantly, multi-layer heterojunction structure and honeycomb-like MOF nanosheets with reversibly flexible deformation create interlamellar pathways to improve the bending resistance of nanofibers. The controlled Co/Zn ion concentration could effectively modulate spatial distribution of Co/Zn MOF to thus generate different conductive channels. The asymmetric flexible supercapacitor based on Ni/Co LDH@ Co/Zn NC@CDCP-N electrode material gives high specific capacitance (175.2 F g−1 at 1 A g−1) and outstanding energy density (54.8 W h kg−1) at high power density (985.5W kg−1). Our work paves a way to facile fabrication of flexible and free-standing electrode materials for practical flexible energy storage, such as artificial electronic skin and soft wearable electronics.
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