Preparation of Cotton Fiber-derived Porous-carbon Materials and Their Application as High-performance Supercapacitors

ABSTRACT

In this paper, high-surface area porous carbons are produced from cotton fibers by pre-oxidation and high temperatures activation pyrolysis treatment process based on the use of K₂CO₃ as pore-forming agent, and the more micro-pores were formed by adding ZnCl₂ during the pyrolysis treatment process. The AC-K has plentiful bigger micropores or the macropores, AC-KZn has rich micropores and the certain number of mesopores. The AC-KZn shows excellent supercapacitance properties and cycle behavior of 5000 cycles, a high specific capacitance of 135Fg ⁻¹ can be achieved, which is higher than that of the AC-K carbon electrode.

文摘

以棉纤维为原料，以K2CO3为成孔剂，采用预氧化-高温活化热解工艺制备高比表面积多孔炭，并在热解过程中加入氯化锌形成更多的微孔. AC-K具有丰富的较大微孔或大孔，AC-KZn具有丰富的微孔和一定数量的中孔。交流KZn具有良好的超电容性能和5000次循环的循环行为，高比电容135Fg−1，比AC-K碳电极高.

KEYWORDS:

• Cotton fibers
• pyrolysis treatment
• carbon materias
• porous
• supercapacitors
• energy storage

关键词:

• 棉纤维
• 热解处理
• 炭材料
• 多孔
• 超级电容器
• 储能

Acknowledgments

The authors acknowledge the Research Initiation Funds for the returned Chinese scholars (Project No. 2017048) and the Scientific Research Fund of Taiyuan University of Technology for financial support (Project No. 20504020203).