Ag decorated porous Si structure as potential high-capacity anode material for Li-ion cells

Raić, Matea; Mikac, Lara; Gotić, Marijan; Škrabić, Marko; Baran, Nikola; Ivanda, Mile (2022) Ag decorated porous Si structure as potential high-capacity anode material for Li-ion cells. Journal of Electroanalytical Chemistry, 922 (1). ISSN 1572-6657

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Abstract

Ag decorated honeycomb silicon structure (HCSi) was prepared by magnesiothermic reduction of the synthesized SiO2 and investigated as a potential anode material for Li-ion batteries. In order to increase the conductivity of HCSi, Ag nanoparticles were deposited on HCSi in different amounts. The characterization of HCSi powder showed the mean particle size of ≈30–40 nm and BET surface area of 102.22 m2/g. Sample HCSi10, which had the highest Ag content, showed the highest conductivity of 1.379 × 103 S/cm and lower BET surface (34.04 m2/g) which is suitable for anode material. These three materials were investigated as anode material in Li-ion cells and their electrochemical properties were investigated by chronoamperometry, cyclic voltammetry and electrochemical impedance spectroscopy. The enhanced electrochemical performance of sample HCSi10 is attributed to the lowest impedance, highest intercalation intensity and current which results in specific capacity of 3333 mAh/g at 0.067 A/g, and 2400 mAh/g at 0.2 A/g.

Item Type:	Article
Uncontrolled Keywords:	Silver nanoparticles; Porous silicon; Silicon anode; Li-ion battery; Li+ intercalation
Subjects:	NATURAL SCIENCES NATURAL SCIENCES > Chemistry > Analytic Chemistry NATURAL SCIENCES > Chemistry > Applied Chemistry
Divisions:	Division of Materials Physics
Depositing User:	Matea Raić
Date Deposited:	07 Feb 2024 12:20
URI:	http://fulir.irb.hr/id/eprint/8488
DOI:	10.1016/j.jelechem.2022.116743

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