Study on Direct-Contact Prelithiation of Soft Carbon Anodes Using Lithium Foil for Lithium-Ion Capacitors

Minji Kang, Sanghyeock Jeong, Gabjin Hwang and Cheolhwi Ryu ()
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Minji Kang: Graduate School, Department of Green Energy Engineering, Hoseo University, Asan 31499, Republic of Korea
Sanghyeock Jeong: Graduate School, Department of Green Energy Engineering, Hoseo University, Asan 31499, Republic of Korea
Gabjin Hwang: Graduate School, Department of Green Energy Engineering, Hoseo University, Asan 31499, Republic of Korea
Cheolhwi Ryu: Graduate School, Department of Green Energy Engineering, Hoseo University, Asan 31499, Republic of Korea

Energies, 2025, vol. 18, issue 9, 1-18

Abstract: As the global energy demand continues to rise, the utilization of lithium-ion capacitors (LICs), which combine the advantages of lithium-ion batteries (LIBs) and electrochemical capacitors (ECs), is also increasing. LICs offer high energy density, high power density, and a long life cycle. However, a prelithiation process is required for graphite-based anode materials. In LICs, the formation of the solid electrolyte interphase (SEI) layer inevitably causes an initial irreversible capacity loss, often resulting in the excessive consumption of lithium ions. Considering the limited lithium resources, prelithiation is essential to achieve a satisfactory electrochemical performance in LICs. Various anode prelithiation techniques have been reported to enhance the capacity of LIBs and LICs. Among these, the direct-contact prelithiation method involves physically contacting lithium metal with the electrode or active material. In this study, direct-contact prelithiation was performed on soft carbon-based anode materials, and LICs were fabricated using activated carbon-based cathode materials. The electrochemical properties of the fabricated LICs were evaluated to demonstrate the feasibility of applying the direct-contact prelithiation technique.

Keywords: direct-contact prelithiation; lithium-ion capacitors; soft carbon (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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