首页|Low-temperature graphitization of lignin via Co-assisted electrolysis in molten salt

Low-temperature graphitization of lignin via Co-assisted electrolysis in molten salt

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The ever-growing energy demand and environmental issues have stimulated the development of sustainable energy technologies.Herein,an efficient and environmentally friendly electrochemical transformation technology was proposed to prepare highly graphitized carbon materials from an abundant natural resource-lignin(LG).The preparation process mainly includes pyrolytic carbonization of raw LG material and electrochemical conversion of amorphous carbon precursor.Interestingly,with the assistance of Co catalyst,the graphitization degree of the products was significantly improved,in which the mechanism was the removal of heteroatoms in LG and the rearrangement of carbon atoms into graphite lattice.Furthermore,tunable microstructures(nanoflakes)under catalytic effects could also be observed by controlling the electrolytic parameters.Compared with the products CN1(without catalyst)and CN5(with 10％catalyst),the specific surface area are 158.957 and 202.246 m2 g-1,respectively.When used as the electrode material for lithium-ion batteries,CN5 delivered a competitive specific capacity of～350 mAh g-1(0.5 C)compared with commercial graphite.The strategy proposed in this work provides an effective way to extract value-added graphite materials from lignin and can be extended to the graphitization conversion of any other amorphous carbon precursor materials.

LigninGraphitic carbonElectrochemical conversionLithium-ion batteries

Shijie Li、Wei-Li Song、Xue Han、Qingqing Cui、Yan-li Zhu、Shuqiang Jiao

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Institute of Advanced Structure Technology,Beijing Institute of Technology,Beijing,100081,China

State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing,100083,China

State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology Beijing,100081,China

National Key R&D Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaFundamental Research Funds for the Central UniversitiesBIT Teli Young Fellow

2022YFC290610052074036517254015187401952022013FRF-TP-17-002C2

2024

10.1016/j.gee.2023.04.006

绿色能源与环境(英文)

绿色能源与环境(英文)

CSTPCD
ISSN：
年,卷(期)：2024.9(9)