Journal
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
Volume 164, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jaap.2022.105489
Keywords
Pressurized pyrolysis; Carbon materials; Brown coal; Li-ion battery
Funding
- Australian Research Council [DP210103025]
- National Natural Science Foundation of China [22078141]
- University of Newcastle
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This study explores the use of Victorian brown coal for carbon foam preparation and its application in LIBs, showing that tailored treatment methods can significantly enhance battery performance.
This study investigates an alternative utilization of earth-abundant Victorian brown coal (BC) for carbon foam preparation and its application in LIBs. Carbon foams (CFs) from blends of Victorian BC and coal tar pitch (CTP) were synthesized through pressurized pyrolysis. The effects of blending ratio and pyrolytic pressure on pore structure transition were systematically studied by SEM and micro-computed tomography beamline (micro-CT) followed by 3D modeling analysis. Furthermore, catalytic graphitization coupled with air activation were used to tailor the structure of CFs as anodic materials for LIBs. The impacts of carbon microstructure and hierarchical pore structure of CFs on the electrochemical performance of LIBs were investigated. The battery test of porous graphitic CFs exhibited an enhanced LIBs performance of 463.1 mAh/g under the current density of 0.1 A/g compared to CFs without treatments. There was 71.49% retention after 1000 cycles at 1 A/g, and the coulombic efficiency remained at 99.99%.
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