Control of Interfacial Layers for High-Performance Porous Si Lithium-Ion Battery Anode

• DOI: 10.1021/am5046197
• Publication Date: 2014-08-25T15:29:15Z
• Authors: Hyungmin Park; Sungjun Lee; Seungmin Yoo; Myoungsoo Shin; Jieun Kim; Myungjin Chun; Nam-Soon Choi; Soojin Park
• Keywords: 01 natural sciences; 7. Clean energy; 0104 chemical sciences

We demonstrate a facile synthesis of micrometer-sized porous Si particles via copper-assisted chemical etching process. Subsequently, metal and/or silicide layers are introduced on the surface using simple reduction Macroporous and metal/metal silicide-coated electrodes exhibit high initial Coulombic efficiency ∼90%. Reversible capacity carbon-coated gradually decays after 80 cycles, while show significantly improved cycling performance even 100 cycles with reversible >1500 mAh g(-1). confirm that stable solid-electrolyte interface layer is formed during cycling, leading to highly performance.