铜盐辅助木质素基碳气凝胶的快速制备及其电化学性能研究

张依依; 娄瑞; 曹启航; 牛涛嫄; 张斌; 尉国栋; 陈海峰

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Study on Copper Salt Assisted Fast Preparation of Lignin-based Carbon Aerogel and Its Electrochemical Properties

Received:May 30, 2023

DOI：10.11981/j.issn.1000-6842.2023.03.97

Key Words:lignin nanoparticles;carbon aerogel;catalysis;electrochemical

Fund Project:浙江大学能源高效清洁利用全国重点实验室开放基金课题（ZJUCEU2022023）。

Author Name	Affiliation	Postcode
ZHANG Yiyi^*	College of Mechanical and Electrical Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021	710021
LOU Rui	College of Mechanical and Electrical Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 National Key Laboratory of Energy Efficient and Clean Utilization， Zhejiang University， Hangzhou， Zhejiang Province， 310027	310027
CAO Qihang	College of Mechanical and Electrical Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021	710021
NIU Taoyuan	College of Mechanical and Electrical Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021	710021
ZHANG Bin	College of Mechanical and Electrical Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021	710021
WEI Guodong	College of Mechanical and Electrical Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021	710021
CHEN Haifeng	College of Mechanical and Electrical Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021	710021

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Abstract:

A fast synthesis method of lignin nanoparticles （LNP）-based aerogel was proposed to prepare three-dimensional （3D） interconnected carbon aerogel with a typical micropores structure. Green and low-cost deep eutectic solvent （DES） used as the reaction solvent， three copper salts added in-situ as the catalyst， and LNP-based cryogel（LRF） as a precursor can be rapidly synthesized for lignin-based carbon aerogel （LRFC）. The study results showed that in-situ doped copper salt can accelerate the gelation rate of gel formation and decrease the gelation time of LRF. Herein， the gel formation of Cu（NO₃）₂ assisted LRF can be shortened to 2.5 h， and the resultant carbon aerogel （N-LRFC） had the highest microporous rate of 94.44% and pore size of 1 nm， high graphitization， and excellent electrochemical performances. At current density of 0.5 A/g， N-LRFC demonstrated exceptional electrochemical performance with a specific capacitance of up to 347.6 F/g. and the diffusion control dominated the electrochemical process.

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