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Preparation of Alkali Lignin-based Porous Carbon Material and Its Application in Supercapacitors
  
DOI：10.11980/j.issn.0254-508X.2019.06.008
Key Words:alkali lignin  porous carbon material  supercapacitor  specific capacitance
Fund Project:国家重点研发计划(2016YFE0125800)；国家自然科学基金(31500492)；浙江省自然科学基金项目(LY16C160005)；中国博士后科学基金面上项目(2017M612035)。
Author NameAffiliation
YUAN Kangshuai1 1. College of Materials and Textiles， Zhejiang Sci-Tech University， Hangzhou， Zhejiang Province， 310018 
GUO Daliang1,2 1. College of Materials and Textiles， Zhejiang Sci-Tech University， Hangzhou， Zhejiang Province， 310018
2.School of Environmental and Natural Resource， Zhejiang University of Science and Technology， Hangzhou， Zhejiang Province， 310023 
ZHANG Ziming1 1. College of Materials and Textiles， Zhejiang Sci-Tech University， Hangzhou， Zhejiang Province， 310018 
GUO Yunpu1 1. College of Materials and Textiles， Zhejiang Sci-Tech University， Hangzhou， Zhejiang Province， 310018 
ZOU Cheng1 1. College of Materials and Textiles， Zhejiang Sci-Tech University， Hangzhou， Zhejiang Province， 310018 
XUE Guoxin1，* 1. College of Materials and Textiles， Zhejiang Sci-Tech University， Hangzhou， Zhejiang Province， 310018 
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Abstract:In this paper， the porous carbon materials were prepared by pyrolyzing alkali lignin with sodium hydroxide according to the carbon-base ratio of 1∶1，1∶3，1∶5 in a laboratory tube furnace. And the porous carbon material was analyzed by ESEM， particle size analyzer， organic element analyzer and infrared spectrum.Supercapacitors were prepared using alkali lignin porous carbon materials， and their electrochemical performance was investigated by cyclic voltammetry and galvanostatic charge and discharge tests. The results showed that the morphology of the alkali lignin-based porous carbon materials were spherical or hemispherical， with a large number of pore structures， and rough surface. However， as the carbon-base ratio increasing from 1∶1 to 1∶5， the average particle size distribution gradually decreased. When the carbon-base ratio was 1∶1， the supercapacitor had the best electrical performance. As the current density increases from 0.1 A/g to 1 A/g， the specific capacitance decreased from 71 F/g to 62 F/g， which decreased about 13%. The specific capacitance was still maintained at 62 F/g when it circulated 500 times at an ultra high current density of 1 A/g， its cycle performance was good．
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