Silk-derived nitrogen-doped porous carbon electrodes with enhanced ionic conductivity for high-performance supercapacitors
Artikel i vetenskaplig tidskrift, 2023

Supercapacitors are attracting extensive attention in energy storage fields thanks to their high safety, cost-effectiveness, and environmental friendliness. The carbon materials, especially for the porous carbon materials derived from renewable biomass materials, are important electrode materials with cost-effective feature for supercapacitors. However, the inferior ionic conductivity of biomass materials inhibits their electrochemical performance in energy storage devices. Herein, an immiscible liquid-mediated method is provided to improve the ionic conductivity of silk-derived nitrogen-doped porous carbon (NPC) electrodes. Natural Bombyx mori (silkworm) silk is used as a carbon source for the preparation of electrode of supercapacitor. Further introducing immiscible organic liquid into the NPCs promotes the ion transport in the inner pores of the electrodes. With the assistance of organic liquid, the supercapacitor presents a specific capacitance of 565.3 F g−1 at a current density of 1 A g−1. The supercapacitor shows the maximum specific energy and power density of 26.2 Wh kg−1 and 263.9 W kg−1, and holds a capacitance retention of approximately 93.3% after 10 000 cycles. This work provides a facile method for the rational design of carbon material derived from biomass material to fabricate electrode with high ionic conductivity, and the strategy will be extendable to other biomass materials for a wide range of applications.

Silk

Immiscible organic liquid

Supercapacitor

Ionic conductivity

Nitrogen-doped porous carbon

Författare

Yue Sun

Huaibei Normal University

Chinese Academy of Sciences

Shan Xue

Huaibei Normal University

Jinhua Sun

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Xingxing Li

Huaibei Normal University

Yuchen Ou

Huaibei Normal University

Baohuan Zhu

Huaibei Normal University

Muslum Demir

Osmaniye Korkut Ata University

TUBITAK Marmara Research Center

Journal of Colloid and Interface Science

00219797 (ISSN) 10957103 (eISSN)

Vol. 645 297-305

Ämneskategorier

Oorganisk kemi

Den kondenserade materiens fysik

DOI

10.1016/j.jcis.2023.04.130

Mer information

Skapat

2023-11-19