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High-Purity Graphitic Carbon for Energy Storage: Sustainable Electrochemical Conversion from Petroleum Coke.


ABSTRACT: The petroleum coke (PC) has been widely used as raw materials for the preparation of electrodes in aluminium electrolysis and lithium-ion batteries (LIB), during which massive CO2 gases are produced. To meet global CO2 reduction, an environmentally friendly route for utilizing PC is highly required. Here, a simple, scalable, catalyst-free process that can directly convert high-sulfur PC into graphitic nanomaterials under cathodic polarization in molten CaCl2 -LiCl at mild temperatures is proposed. The energy consumption of the proposed process is calculated to be 3 627.08 kWh t-1 , half that of the traditional graphitization process (≈7,825.21 kWh t-1 graphite). When applied as a negative electrode for LIBs, the as-converted graphite materials deliver a competitive specific capacity of ≈360 mAh g-1 (0.2 C) compared with commercial graphite. This approach has great potential to scale up for sustainably converting low-value PC into high-quality graphite for energy storage.

SUBMITTER: Zhu F 

PROVIDER: S-EPMC10015905 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature

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High-Purity Graphitic Carbon for Energy Storage: Sustainable Electrochemical Conversion from Petroleum Coke.

Zhu Fei F   Song Wei-Li WL   Ge Jianbang J   Wang Zhe Z   Huang Zheng Z   Li Shijie S   Wang Mingyong M   Zuo Haibin H   Jiao Shuqiang S   Zhu Hongmin H  

Advanced science (Weinheim, Baden-Wurttemberg, Germany) 20230122 8


The petroleum coke (PC) has been widely used as raw materials for the preparation of electrodes in aluminium electrolysis and lithium-ion batteries (LIB), during which massive CO<sub>2</sub> gases are produced. To meet global CO<sub>2</sub> reduction, an environmentally friendly route for utilizing PC is highly required. Here, a simple, scalable, catalyst-free process that can directly convert high-sulfur PC into graphitic nanomaterials under cathodic polarization in molten CaCl<sub>2</sub> -LiC  ...[more]

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