LiF modified hard carbon from date seeds as an anode material for enhanced low-temperature lithium-ion batteries
Issatayev N. Tassybay K. Wu N.-L. Nurpeissova A. Bakenov Z. Kalimuldina G.
October 2024Elsevier Ltd
Carbon
2024#229
The performance of traditional Li-ion batteries deteriorates when operating at sub-zero temperatures mainly due to the slow diffusion of Li-ions in commercial negative electrode materials. Various alternative anodes have been explored, but complex fabrication methods hinder practical implementation. This work proposes a cost-effective anode material, a porous structured nitrogen-doped hard carbon synthesized from date seeds with further LiF modification to achieve an artificial LiF-rich solid electrolyte interphase (SEI) layer. The resulting anode material showcases promising characteristics, achieving a specific capacity of 525 mAh g−1 after 50 cycles at room temperature. Furthermore, it maintains a substantial capacity of 280 mAh g−1 after 100 cycles at −20 °C. Notably, even when subjected to a high current of 2C at −20 °C, the electrode still provides a remarkable capacity of 72 mAh g−1 after 500 cycles. The outstanding charge storage performance at low temperatures is attributed to the predominance of capacitance-controlled charge storage mechanisms in the prepared anode. Post-mortem analysis confirms structural stability and formation of a uniform LiF-rich SEI layer. This novel approach presents a practical solution to the difficulties encountered by LIBs in cold environments, paving the way for improved battery performance and longevity.
Anode , Hard carbon , Li-ion battery , Low temperature , Non-graphitized carbon , SEI modification
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Department of Chemical and Materials Engineering, Nazarbayev University, Kabanbay Batyr Ave. 53, Astana, 010000, Kazakhstan
Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
National Laboratory Astana, Kabanbay Batyr Ave. 53, Astana, 010000, Kazakhstan
Institute of Batteries, Kabanbay Batyr Ave. 53, Astana, 010000, Kazakhstan
Department of Mechanical and Aerospace Engineering, Nazarbayev University, Kabanbay Batyr Ave. 53, Astana, 010000, Kazakhstan
Department of Chemical and Materials Engineering
Department of Chemical Engineering
National Laboratory Astana
Institute of Batteries
Department of Mechanical and Aerospace Engineering
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