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Paper-Derived Flexible 3D Interconnected Carbon Microfiber Networks with Controllable Pore Sizes for Supercapacitors
Pengcheng Dai1, Yanming Xue2,3, Shuo Zhang1
1State Key Laboratory of Heavy Oil Processing, Institute of New Energy , China University of Petroleum (East China) , Qingdao 266580 , P. R. China.
ACS Applied Materials & Interfaces
|October 9, 2018
Summary
We developed a simple method to create boron, nitrogen, and oxygen-doped 3D carbon fiber networks from paper for energy storage. These materials offer high performance in supercapacitors.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Three-dimensional (3D) heteroatom-doped carbon fiber networks are crucial for advanced energy storage devices.
- Current production methods are often expensive and complex, limiting practical applications.
Purpose of the Study:
- To develop a cost-effective and facile method for synthesizing heteroatom-doped 3D carbon microfiber networks.
- To investigate the performance of these novel materials as electrodes in supercapacitors.
Main Methods:
- A one-step "chemical vapor etching and doping" process was employed using cellulose-based paper as a precursor.
- Boron, nitrogen, and oxygen heteroatoms were incorporated into the 3D carbon microfiber structure.
- The synthesized materials (BNOCs) were characterized for their structural, textural, and elemental properties.
Main Results:
- Flexible, interconnected boron, nitrogen, and oxygen-doped carbon microfiber networks (BNOCs) with controlled pore sizes were successfully synthesized.
- BNOCs demonstrated an interconnected structure, high surface area, abundant mesopores/macropores, and functional groups enhancing performance.
- Supercapacitors utilizing BNOCs as binder-free electrodes achieved high specific capacitance (357 F g-1), excellent capacitance retention (150 F g-1 at 200 A g-1), high energy density (12.4 W h kg-1), and high power density (300.6 kW kg-1).
- An all-solid-state supercapacitor also showed a high specific capacitance of 242.4 F g-1.
Conclusions:
- The facile one-step synthesis offers a scalable and cost-effective route to advanced carbon materials for energy storage.
- The unique structural and compositional features of BNOCs enable superior electrochemical performance in both aqueous and solid-state supercapacitors.
- This work presents a promising strategy for developing high-performance, low-cost energy storage solutions from abundant biomass resources.
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