title: Carbon Nanofiber/3D Nanoporous Silicon Hybrids as High Capacity Lithium Storage Materials.
abstract: Carbon nanofiber (CNF)/3D nanoporous (3DNP) Si hybrid materials were prepared by chemical etching of melt-spun Si/Al-Cu-Fe alloy nanocomposites, followed by carbonization using a pitch. CNFs were successfully grown on the surface of 3DNP Si particles using residual Fe impurities after acidic etching, which acted as a catalyst for the growth of CNFs. The resulting CNF/3DNP Si hybrid materials showed an enhanced cycle performance up to 100 cycles compared to that of the pristine Si/Al-Cu-Fe alloy nanocomposite as well as that of bare 3DNP Si particles. These results indicate that CNFs and the carbon coating layer have a beneficial effect on the capacity retention characteristics of 3DNP Si particles by providing continuous electron-conduction pathways in the electrode during cycling. The approach presented here provides another way to improve the electrochemical performances of porous Si-based high capacity anode materials for lithium-ion batteries.
authors.affiliation: Department of Energy Engineering, Hanyang University, Seoul, 133-791, Republic of Korea.
authors.forename: Hyeong-Il
authors.initials: HI
authors.lastname: Park
authors.affiliation: Department of Energy Engineering, Hanyang University, Seoul, 133-791, Republic of Korea.
authors.forename: Myungbeom
authors.initials: M
authors.lastname: Sohn
authors.affiliation: Department of Energy Engineering, Hanyang University, Seoul, 133-791, Republic of Korea.
authors.forename: Dae Sik
authors.initials: DS
authors.lastname: Kim
authors.affiliation: Next-G Institute of Technology, Iljin Electric Co., Ltd., Ansan, 425-100, Republic of Korea.
authors.forename: Cheolho
authors.initials: C
authors.lastname: Park
authors.affiliation: Korea Electro-technology Research Institute, Changwon, 642-120, Republic of Korea.
authors.forename: Jeong-Hee
authors.initials: JH
authors.lastname: Choi
authors.affiliation: Department of Energy Engineering, Hanyang University, Seoul, 133-791, Republic of Korea. khansu@hanyang.ac.kr.
authors.forename: Hansu
authors.initials: H
authors.lastname: Kim
mesh_terms: D002244:Carbon / Q000737:chemistry*; D011211:Electric Power Supplies; D008670:Metals / Q000737:chemistry*; D057139:Nanofibers / Q000737:chemistry*; D016062:Porosity; D012825:Silicon / Q000737:chemistry*
chemical_list: D008670:Metals; D002244:Carbon; D012825:Silicon
keywords: batteries; carbon; hybrids; nanofibers; silicon