Halim, Martin Kim, Jung Sub Choi, Jeong-Gil Lee, Joong Kee 2024-01-20T07:04:52Z 2024-01-20T07:04:52Z 2021-09-04 2015-04-15 0169-4332 https://pubs.kist.re.kr/handle/201004/125549 Nanostructured silicon synthesis by surface modification of commercial micro-powder silicon was investigated in order to reduce the maximum volume change over cycle. The surface of micro-powder silicon was modified using an Ag metal-assisted chemical etching technique to produce nanostructured material in the form of bundle-type silicon nanorods. The volume change of the electrode using the nanostructured silicon during cycle was investigated using an in-situ dilatometer. Our result shows that nanostructured silicon synthesized using this method showed a self-relaxant characteristic as an anode material for lithium ion battery application. Moreover, binder selection plays a role in enhancing self-relaxant properties during delithiation via strong hydrogen interaction on the surface of the silicon material. The nanostructured silicon was then coated with carbon from propylene gas and showed higher capacity retention with the use of polyacrylic acid (PAA) binder. While the nano-size of the pore diameter control may significantly affect the capacity fading of nanostructured silicon, it can be mitigated via carbon coating, probably due to the prevention of Li ion penetration into 10 nano-meter sized pores. (C) 2014 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV LONG CYCLE LIFE NANOSTRUCTURED SILICON RECHARGEABLE BATTERIES HIGH-CAPACITY ELECTRODES LITHIATION MECHANISM SURFACE EXTRACTION MICROSCOPY Electrochemical characterization of carbon coated bundle-type silicon nanorod for anode material in lithium ion secondary batteries Article 10.1016/j.apsusc.2014.08.085 1 APPLIED SURFACE SCIENCE, v.334, pp.115 - 122 APPLIED SURFACE SCIENCE 334 115 122 scie scopus 000351609900020 2-s2.0-84925604226 Chemistry, Physical Materials Science, Coatings & Films Physics, Applied Physics, Condensed Matter Chemistry Materials Science Physics Article; Proceedings Paper LONG CYCLE LIFE NANOSTRUCTURED SILICON RECHARGEABLE BATTERIES HIGH-CAPACITY ELECTRODES LITHIATION MECHANISM SURFACE EXTRACTION MICROSCOPY Bundle-type silicon nanorods (BSNR) In-situ dilatometer Metal-assisted chemical etching Nanostructured silicon Self relaxant Volume expansion