Construction of ZIF@electrospun cellulose nanofiber derived N doped metallic cobalt embedded carbon nanofiber composite as binder-free supercapacitance electrode

Ying Wu; Guilu Xu; Weilin Zhang; Chi Song; Linjie Wang; Xingyu Fang; Lijie Xu; Shuguang Han; Juqing Cui; Lu Gan

doi:10.1016/j.carbpol.2021.118166

Construction of ZIF@electrospun cellulose nanofiber derived N doped metallic cobalt embedded carbon nanofiber composite as binder-free supercapacitance electrode

Carbohydr Polym. 2021 Sep 1:267:118166. doi: 10.1016/j.carbpol.2021.118166. Epub 2021 May 7.

Authors

Ying Wu¹, Guilu Xu¹, Weilin Zhang¹, Chi Song¹, Linjie Wang¹, Xingyu Fang¹, Lijie Xu², Shuguang Han¹, Juqing Cui¹, Lu Gan³

Affiliations

¹ College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, Jiangsu, People's Republic of China.
² College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, Jiangsu, People's Republic of China.
³ College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, Jiangsu, People's Republic of China. Electronic address: ganlu@njfu.edu.cn.

PMID: 34119139
DOI: 10.1016/j.carbpol.2021.118166

Abstract

In this study, binder-free hybrid supercapacitance electrode based on N, Co co-doped porous carbon polyhedral encapsulated carbon nanofibers composites (N-Co/CNF) was prepared through pyrolyzing cobalt based zeolitic imidazolate frameworks (ZIF-67(Co)) incorporated electrospun cellulose nanofibers. With rational combination of the conductivity provided by cellulose derived CNF, promising porosity provided by CNF and ZIF-67(Co) derived porous carbon and uniformly dispersed metallic cobalt nanoparticles, the N-Co/CNF displayed excellent electrochemical properties. Specifically, the N-Co/CNF pyrolyzed at 800 °C possessed superior electrochemical performance in 1 M H₂SO₄ electrolyte, including a specific capacitance of ~433 F/g and 84% of the capacitance retention after 3000 consecutive charge-discharge cycles. This significantly exceeded the performance of cellulose derived CNF based pure carbonaceous electrode. Therefore, the present study provides a new view on the construction of high performance hybrid supercapacitance electrode which introduces renewable biomass resources like cellulose as both carbonaceous material precursors and conductive binders.

Keywords: Carbon nanofiber; Cellulose; Electrospinning; Hybrid supercapacitor; Metal organic frameworks.