首页|Spent graphite regeneration:Exploring diverse repairing manners with impurities-catalyzing effect towards high performance and low energy consumption

Spent graphite regeneration:Exploring diverse repairing manners with impurities-catalyzing effect towards high performance and low energy consumption

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Spent battery recycling has received considerable attention because of its economic and environmental potential.A large amount of retired graphite has been produced as the main electrode material,accom-panied by a detailed exploration of the repair mechanism.However,they still suffer from unclear repair mechanisms and physicochemical evolution.In this study,spent graphite was repaired employing three methodologies:pickling-sintering,pyrogenic-recovery,and high-temperature sintering.Owing to the catalytic effect of the metal-based impurities and temperature control,the as-obtained samples displayed an ordered transformation,including the interlayer distance,crystalline degree,and grain size.As anodes of lithium ions batteries,the capacity of repaired samples reached up to 310 mA h g-1 above after 300 loops at 1.0 C,similar to that of commercial graphite.Meanwhile,benefitting from the effective assembly of carbon atoms in internal structure of graphite at＞1400 ℃,their initial coulombic efficiency were＞87％.Even at 2.0 C,the capacity of samples remained approximately 244 mA h g-1 after 500 cycles.Detailed electrochemical and kinetic analyses revealed that a low temperature enhanced the isotropy,thereby enhancing the rate properties.Further,economic and environmental analyses revealed that the revenue obtained through suitable pyrogenic-recovering manners was approximately the largest value(5500 $ t-1).Thus,this study is expected to clarify the in-depth effect of different repair methods on the traits of graphite,while offering all-round evaluations of repaired graphite.

Spent graphite regenerationRepairTemperature treatment

Yu Dong、Zihao Zeng、Zhengqiao Yuan、Bing Wang、Hai Lei、Wenqing Zhao、Wuyun Ai、Lingchao Kong、Yue Yang、Peng Ge

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School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,Hunan,China

Henan Institute of Advanced Technology,Zhengzhou University,Zhengzhou 450001,Henan,China

Shenzhen Xinmao New Energy Technology Co.,LTD,Shenzhen 518100,Guangdong,China

国家自然科学基金国家自然科学基金Young Elite Scientists Sponsorship Program by China Association for Science and Technology国家重点研发计划Hunan Provincial Education Office Foundation of ChinaCollaborative Innovation Centre for Clean and Efficient Utilization of Strategic Metal Mineral Resources,Found of State Key Labo

52374288522042982022QNRC0012022YFC3900805-4/721B0147BGRIMM-KJSKL-2017-13

2024

10.1016/j.jechem.2023.12.052

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.91(4)
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