Designing Stable and Highly Effective Anode Materials for Lithium Ion Capacitors using Plasma Treatment

초록

A heterogeneous composite of graphene oxide (GO) and lithium-based metal oxide was developed for use as an active material in lithium-ion capacitors (LICs). The 3D mesoporous structured composite was fabricated using GO and lithium titanate oxide (LTO) through a combination of mixing, freeze-drying, and plasma treatment. Among the samples, the PrGO/LTO anode containing 80.0% LTO exhibited the highest specific capacity of 72.6 mAh g?1 at a 20 C rate. In a full-cell configuration with activated carbon (AC) as the cathode, the device delivered an energy density of 41.5 Wh kg?¹ and a power density of 2000 W kg?1 at 1 A g?1, with a capacitance of 36.3 F g?1 and a retention rate of 92.6% after 2000 cycles. These results highlight the potential of the PrGO/LTO composite structure as a high-performance LIC anode by reducing internal resistance and enhancing ion diffusion. -본 연구는 2025년도 산업통상자원부 및 산업기술기획평가원(KEIT) 연구비 지원에 의한 연구임(RS-2022-00156073).