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Chemistry and Industry of Forest Products ›› 2022, Vol. 42 ›› Issue (5): 76-82.doi: 10.3969/j.issn.0253-2417.2022.05.011

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Preparation and Application of Biomass-based Carbon Aerogel as Electrodes for Supercapacitors

Hao ZHENG, Jinghui ZHOU, Yao LI()   

  1. School of Light Industry & Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
  • Received:2021-09-17 Online:2022-10-28 Published:2022-11-02
  • Contact: Yao LI E-mail:liyaodlpu@163.com

Abstract:

In order to improve the stability of biomass-based carbon aerogels, lignin(L) was modified with phosphoric acid to obtain phosphinized lignin(PL). Then, a stable covalent bond was formed with bacterial cellulose(BC) to prepare biomass-based carbon aerogels, namely bacterial cellulose/phosphinized lignin(BC/PL) carbon aerogels, which were used as electrodes for supercapacitors. The results showed that with the introduction of phosphoric acid, the thermal stability of the prepared biomass-based carbon aerogels was improved. Meanwhile, XRD analysis and Raman spectroscopy showed that its structural order was similar to the graphite structure, and the specific surface area was 310.9 m2/g, with an average pore size of 2.3 nm. The results of electrochemical performance analysis showed that the prepared modified aerogel had excellent electrochemical performance, with a specific capacity of 216.4 F/g at a current density of 1 A/g and a maximum energy density of 24.4 W·h/kg at a power density of 800 W/kg.

Key words: lignin, phosphating modification, aerogel, supercapacitor

CLC Number: