High-Quality Activated Carbon Supports for Silicon Anodes Enabled for Fast Charging
발표자
김민수 (충남대학교)
연구책임자
송우진 (충남대학교)
공동저자
송우진 (충남대학교), 김민수 (충남대학교)
초록
내용
To achieve high energy density in lithium-ion batteries, the development of silicon-carbon composites that surpass the theoretical limits of conventional graphite anodes is essential. In this study, a buffer structure was designed using porous activated carbon derived from unutilized domestic petroleum residue to effectively control silicon's volume expansion. Specifically, a nano-sized silicon layer was formed on the petroleum-based porous activated carbon via Chemical Vapor Deposition (CVD), followed by a final exterior coating with pitch. In this buffer structure, the nano-silicon mitigates its own expansion stress compared to micro-particles, the abundant internal pores of the activated carbon physically accommodate silicon's volume changes, and the outer pitch-derived carbon layer provides additional cushioning to suppress the structural collapse of the electrode.