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A SiO x ‐Based Anode in a High‐Voltage Lithium‐Ion Battery
Author(s) -
Elia Giuseppe Antonio,
Hassoun Jusef
Publication year - 2017
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201700316
Subject(s) - anode , materials science , tetraethyl orthosilicate , electrochemistry , lithium (medication) , battery (electricity) , nanocomposite , chemical engineering , spinel , cathode , lithium ion battery , electrode , nanotechnology , chemistry , metallurgy , medicine , power (physics) , physics , quantum mechanics , endocrinology , engineering
A novel synthetic procedure for the preparation of a SiO x ‐based nanocomposite, involving gelification of resorcinol‐formaldehyde and tetraethyl orthosilicate, is reported. The composite is characterized as an anode material in a lithium‐ion battery. The micrometric, amorphous material has a characteristic nanostructured configuration and shows an electrochemical process involving both the alloying of Li−Si and the insertion of Li into the hard carbon matrix. The electrode reveals in a lithium half‐cell a relatively low impedance and a reversible capacity ranging from 650 mAh g −1 , at the lower current, to 400 mAh g −1 at high current regimes, with a cycle life extending to 200 cycles. The anode is combined with a high‐voltage LiNi 0.5 Mn 1.5 O 4 spinel cathode in a 4.3 V lithium‐ion battery delivering a capacity of about 115 mAh g −1 and operating at the high rate of 5C. The suitable synthesis pathway, the low cost and the promising electrochemical behavior suggest the nanocomposite anode for application in high‐performance lithium‐ion battery.