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Study on Fabrications and Storage Capacity of Coal Tar Pitch Based V2O3@C Composite Materials (Supporting Information)

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posted on 21.06.2022, 02:30 authored by Jianke LI, Xincheng MIAO, Shenhao WANG, Shaobei CHEN, Beibei HAN, Guiying XU, Kun WANG, Baigang AN, Dongying JU, Weimin ZHOU

A green, rapid, and facile synthesis method of activated carbon was developed and optimized using 50 nm MgO nanoparticle (NP)-based pore templating in tandem with an integrated drying and carbonization-activation heat treatment. TEMPO-oxidized cellulose nanofibers (TOCN) were mixed with MgO NPs and KOH, freeze-dried, heat treated first at 350 °C then at 800 °C to get templated activated carbon. Selective pore formation by MgO and KOH resulting in the development of mesopores and micropores, respectively was confirmed. NP-based templating is confirmed to be viable even with continuous heat treatment, and does not affect any transformations during each heat treatment phase. Through optimization for the highest surface area and optimal hierarchical porosity, templated activated carbon had a high specific capacitance of 269 F g−1 at 0.5 A g−1 with 95.92 % cycle stability after 2000 charge-discharge cycles at 10 A g−1.

Funding

University of Science and Technology Liaoning

Department of Education of Liaoning Province

Electrochemical Low Temperature Synthesis of Micro/Nano SiC by Molten Salt and Its Mechanism

National Natural Science Foundation of China

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Ion storage operation of ordered microporous/ultramicroporous carbon for research

National Natural Science Foundation of China

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Corresponding author email address

aszhou15242870697@163.com

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© 2022 The Author(s).