In this study, we report significant improvements in lithium-ion battery anodes cost and performance, by fabricating nano porous silicon (Si) particles from Si wafer sludge using the metal-assisted chemical etching (MACE) process. To solve the problem of volume expansion of Si during alloying/de-alloying with lithium ions, a layer was formed through nitric acid treatment, and Ag particles were removed at the same time. This layer acts as a core-shell structure that suppresses Si volume expansion. Additionally, the specific surface area of Si increased by controlling the etching time, which corresponds to the volume expansion of Si, showing a synergistic effect with the core-shell. This development not only contributes to the development of high-capacity anode materials, but also highlights the possibility of reducing manufacturing costs by utilizing waste Si wafer sludge. In addition, this method enhances the capacity retention rate of lithium-ion batteries by up to 38 %, marking a significant step forward in performance improvements.

1. 서 론
2. 실험 방법
    2.1. 나노 실리콘 분말 제작
    2.2. 다공성 실리콘 분말 제작
    2.3. 셀 제작 및 전기화학적 특성 분석
3. 결과 및 고찰
4. 결 론
References
<저자소개>

• 심보림(단국대학교 파운드리공학과) | Borim Shim (Department of Foundry Engineering, Dankook University, Jukjeon 16890, Republic of Korea)
• 김은하(단국대학교 에너지공학과) | Eunha Kim (Department of Energy Engineering, Dankook University, Cheonan 31116, Republic of Korea)
• 임현민(단국대학교 에너지공학과) | Hyeonmin Yim (Department of Energy Engineering, Dankook University, Cheonan 31116, Republic of Korea)
• 김원진(단국대학교 파운드리공학과) | Won Jin Kim (Department of Foundry Engineering, Dankook University, Jukjeon 16890, Republic of Korea)
• 김우병(단국대학교 파운드리공학과, 단국대학교 에너지공학과) | Woo-Byoung Kim (Department of Foundry Engineering, Dankook University, Jukjeon 16890, Republic of Korea, Department of Energy Engineering, Dankook University, Cheonan 31116, Republic of Korea) Corresponding author