Premium
Direct Evidence of Lithium Ion Migration in Resistive Switching of Lithium Cobalt Oxide Nanobatteries
Author(s) -
Nguyen Van Son,
Mai Van Huy,
Auban Senzier Pascale,
Pasquier Claude,
Wang Kang,
Rozenberg Marcelo J.,
Brun Nathalie,
March Katia,
Jomard François,
Giapintzakis John,
Mihailescu Cristian N.,
Kyriakides Evripides,
Nukala Pavan,
Maroutian Thomas,
Agnus Guillaume,
Lecoeur Philippe,
Matzen Silvia,
Aubert Pascal,
Franger Sylvain,
Salot Raphaël,
Albouy PierreAntoine,
Alamarguy David,
Dkhil Brahim,
Chrétien Pascal,
Schneegans Olivier
Publication year - 2018
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201801038
Subject(s) - materials science , lithium (medication) , cobalt , cobalt oxide , oxide , ion , nanoelectronics , nanotechnology , optoelectronics , neuromorphic engineering , chemistry , computer science , medicine , organic chemistry , metallurgy , endocrinology , machine learning , artificial neural network
Lithium cobalt oxide nanobatteries offer exciting prospects in the field of nonvolatile memories and neuromorphic circuits. However, the precise underlying resistive switching (RS) mechanism remains a matter of debate in two‐terminal cells. Herein, intriguing results, obtained by secondary ion mass spectroscopy (SIMS) 3D imaging, clearly demonstrate that the RS mechanism corresponds to lithium migration toward the outside of the Li x CoO 2 layer. These observations are very well correlated with the observed insulator‐to‐metal transition of the oxide. Besides, smaller device area experimentally yields much faster switching kinetics, which is qualitatively well accounted for by a simple numerical simulation. Write/erase endurance is also highly improved with downscaling – much further than the present cycling life of usual lithium‐ion batteries. Hence very attractive possibilities can be envisaged for this class of materials in nanoelectronics.