Interpenetrated 3D porous silicon as high stable anode material for Li-Ion battery
Liu, YX; Qin, LJ; Liu, F; Fan, YM; Ruan, JJ; Zhang, SJ; Liu, Yanxia; Qin, Lijuan; Liu, Fan; Fan, Yameng; Ruan, Jingjing; Zhang, Suojiang

Confronting issues of silicon-based anode for its huge volume change (similar to 320%), porous silicon attracts note-worthy attention. Most previous studies are concentrated on designing various sacrificial templates to endow silicon with marvelous shapes or structures. Herein, without the assistance of sacrificial template, a template-free method is developed to fabricate interpenetrated three-dimensional porous silicon. A silica composite gel, which possesses numerous nano-pores, is primarily constructed, and the silicon can be inherently equipped with these nano-pores via modified magnesiothermic reduction. Scanning electron microscope and transmission electron microscope images illustrate that the as-prepared porous silicon possesses bi-continuous structure. It also exhibits high initial reversible capacity (similar to 1.41 mAh cm(-2) at 0.16 mA cm(-2)), superior cycling stability (similar to 0.98 mAh cm(-2) after 200 cycles), and good rate performance. In addition, analysis of cyclic voltammetry curves and electrochemical impedance spectroscopy demonstrate that this porous silicon possesses appropriate channels for rapid Li(+ )transport and low electrochemical reaction polarization resistance.

KeywordSilicon-based Anode Size-dependent Fracture Template-free Method High-energy Composite Gel Amorphous-silicon Magnesiothermic Reduction At-carbon Bi-continues Structure Performance Lithium-ion Batteries Composite Nanoparticles Storage Framework Oxide
WOS IDWOS:000451936400019
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Liu, YX,Qin, LJ,Liu, F,et al. Interpenetrated 3D porous silicon as high stable anode material for Li-Ion battery[J]. JOURNAL OF POWER SOURCES,2018,406:167.
APA Liu, YX.,Qin, LJ.,Liu, F.,Fan, YM.,Ruan, JJ.,...&Zhang, Suojiang.(2018).Interpenetrated 3D porous silicon as high stable anode material for Li-Ion battery.JOURNAL OF POWER SOURCES,406,167.
MLA Liu, YX,et al."Interpenetrated 3D porous silicon as high stable anode material for Li-Ion battery".JOURNAL OF POWER SOURCES 406(2018):167.
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