Jump to main content
Jump to site search


Surface modification of biomass-derived hard carbon by grafting porous carbon nanosheets for high-performance supercapacitors

Abstract

The conversion of renewable biomass offers a great opportunity for economic fabrication of carbon materials for energy storage devices. However, it is difficult to finely tune the structures of biomass-derived hard carbons (BHCs) due to the inherent robust microstructures of biomass itself, limiting the wide applications of BHCs. How to further optimize the structures of BHCs for supercapacitors is still a large challenge. Inspired by nature that leaves effectively increase the air-accessible surface area of plants to absorb more carbon dioxide for photosynthesis, we aim to increase the accessible surface area of BHCs for ion adsorption by grafting leaves-like units onto the surface of BHCs. In this work, porous carbon nanosheets (PCNSs) functioned as porous leaves are grafted onto rice husk-derived carbons (RHCs) to fabricate PCNS/RHC composites. The as-prepared PCNS/RHC composites are endowed with sheet-like architecture and abundant short pores. As the electrodes for supercapacitors, the PCNS/RHC composite exhibits a high specific capacitance of 315 F g–1 at 0.1 A g–1 and an excellent rate capability of 189 F g–1 at 50 A g–1. The present work demonstrates an effective and universal strategy to boost the functionality of BHCs materials for energy storage devices.

Back to tab navigation

Supplementary files

Publication details

The article was received on 03 May 2018, accepted on 10 Jul 2018 and first published on 13 Jul 2018


Article type: Paper
DOI: 10.1039/C8TA04080J
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
  •   Request permissions

    Surface modification of biomass-derived hard carbon by grafting porous carbon nanosheets for high-performance supercapacitors

    S. Dong, X. He, H. Zhang, X. Xie, M. Yu, C. Yu, N. Xiao and J. Qiu, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA04080J

Search articles by author

Spotlight

Advertisements