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Assembly of Lignin-based Hydrogel Electrode Materials and Its Electrochemical Properties
Received:December 24, 2020  
DOI：10.11980/j.issn.0254-508X.2021.04.001
Key Words:sodium lignosulfonate  graphene  hydrogel  supercapacitor
Fund Project:国家自然科学基金（31770628，31901273）；山东省自然基金（ZR2019BC021）；科教产融合创新试点工程（2020KJC-ZD14）。
Author NameAffiliationPostcode
JIA Qianqian State Key Lab of Bio-based Materials and Green Papermaking /Key Lab of Pulp & Paper Science and Technology of Education Ministry of China， Qilu University of Technology （Shandong Academy of Sciences）， Ji´nan， Shandong Province， 250353 250353
LI Fengfeng State Key Lab of Bio-based Materials and Green Papermaking /Key Lab of Pulp & Paper Science and Technology of Education Ministry of China， Qilu University of Technology （Shandong Academy of Sciences）， Ji´nan， Shandong Province， 250353 250353
YANG Guihua State Key Lab of Bio-based Materials and Green Papermaking /Key Lab of Pulp & Paper Science and Technology of Education Ministry of China， Qilu University of Technology （Shandong Academy of Sciences）， Ji´nan， Shandong Province， 250353 250353
ZHANG Zhili State Key Lab of Bio-based Materials and Green Papermaking /Key Lab of Pulp & Paper Science and Technology of Education Ministry of China， Qilu University of Technology （Shandong Academy of Sciences）， Ji´nan， Shandong Province， 250353 250353
WANG Xiaofa State Key Lab of Bio-based Materials and Green Papermaking /Key Lab of Pulp & Paper Science and Technology of Education Ministry of China， Qilu University of Technology （Shandong Academy of Sciences）， Ji´nan， Shandong Province， 250353 250353
CHEN Jiachuan State Key Lab of Bio-based Materials and Green Papermaking /Key Lab of Pulp & Paper Science and Technology of Education Ministry of China， Qilu University of Technology （Shandong Academy of Sciences）， Ji´nan， Shandong Province， 250353 250353
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Abstract:In this study， sodium lignosulfonate （LS） and graphene oxide （GO） were used as functional molecules and templates， respectively， lignosulfonate-modified graphene hydrogel （LGH） was synthesized by one-step hydrothermal method at 80℃. And the supercapacitor was directly assembled using LGH as self-supporting electrode material to test its electrochemical performance. LGH was characterized with SEM， EA and FT-IR， and its electrochemical properties were test by cyclic voltammetry （CV）， galvanostatic charge/discharge cycling （GC）， and electrochemical impedance spectrum （EIS）. The results showed that LGH had an interpenetrating network structure and LS was successfully modified in the network structure. Besides， the electrochemical test results showed that when the current density was 1 A/g， LGH had an impressive specific capacitance of 140 F/g in 1 mol/L HClO4 aqueous electrolyte， which was 1.73 times higher than that of pure graphene gel （81 F/g）. Moreover， the device exhibited high rate capability （74.3% capacitance retention at 20 A/g）.
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