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Three‐Dimensional Porous Silicon Particles for Use in High‐Performance Lithium Secondary Batteries
Author(s) -
Kim Hyunjung,
Han Byunghee,
Choo Jaebum,
Cho Jaephil
Publication year - 2008
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200804355
Subject(s) - materials science , porosity , annealing (glass) , porous silicon , composite number , silicon , etching (microfabrication) , chemical engineering , nanoparticle , particle (ecology) , composite material , lithium (medication) , thermal , carbon fibers , nanotechnology , metallurgy , medicine , oceanography , physics , layer (electronics) , endocrinology , geology , meteorology , engineering
Particle‐larly good! Thermal annealing and etching of physical composite butyl‐capped Si gels and SiO 2 nanoparticles at 900 °C under an Ar atmosphere is a versatile method for the formation of 3D porous bulk Si particles (see picture). Complete etching of the SiO 2 from the SiO 2 /carbon‐coated Si (c‐Si) composite results in the retention of the remaining c‐Si as a highly porous but interconnected structure, which preserves the starting morphology.
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