High-Performance Biomass-Based Flexible Solid-State Supercapacitor Constructed of Pressure-Sensitive Lignin-Based and Cellulose Hydrogels

Zhiyuan Peng; Yubo Zou; Shiqi Xu; Wenbin Zhong; Wantai Yang

doi:10.1021/acsami.8b05171

High-Performance Biomass-Based Flexible Solid-State Supercapacitor Constructed of Pressure-Sensitive Lignin-Based and Cellulose Hydrogels

ACS Appl Mater Interfaces. 2018 Jul 5;10(26):22190-22200. doi: 10.1021/acsami.8b05171. Epub 2018 Jun 19.

Authors

Zhiyuan Peng¹, Yubo Zou¹, Shiqi Xu¹, Wenbin Zhong¹, Wantai Yang²

Affiliations

¹ College of Materials Science and Engineering , Hunan University , Changsha 410082 , P. R. China.
² Department of Polymer Science , Beijing University of Chemical Technology , Beijing 100029 , P. R. China.

PMID: 29882652
DOI: 10.1021/acsami.8b05171

Abstract

Employing renewable, earth-abundant, environmentally friendly, low-cost natural materials to design flexible supercapacitors (FSCs) as energy storage devices in wearable/portable electronics represents the global perspective to build sustainable and green society. Chemically stable and flexible cellulose and electroactive lignin have been employed to construct a biomass-based FSC for the first time. The FSC was assembled using lignosulfonate/single-walled carbon nanotube_HNO₃ (Lig/SWCNT_HNO₃) pressure-sensitive hydrogels as electrodes and cellulose hydrogels as an electrolyte separator. The assembled biomass-based FSC shows high specific capacitance (292 F g^-1 at a current density of 0.5 A g^-1), excellent rate capability, and an outstanding energy density of 17.1 W h kg^-1 at a power density of 324 W kg^-1. Remarkably, the FSC presents outstanding electrochemical stability even suffering 1000 bending cycles. Such excellent flexibility, stability, and electrochemical performance enable the designed biomass-based FSCs as prominent candidates in applications of wearable electronic devices.

Keywords: biopolymer; cellulose; flexible supercapacitor; lignosulfonate; pressure-sensitive hydrogel.