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Direct Evidence of Lithium Ion Migration in Resistive Switching of Lithium Cobalt Oxide Nanobatteries

Abstract : 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.
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https://hal-centralesupelec.archives-ouvertes.fr/hal-01799107
Contributor : Olivier Schneegans <>
Submitted on : Thursday, May 24, 2018 - 1:14:34 PM
Last modification on : Wednesday, September 16, 2020 - 5:51:19 PM

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van Son Nguyen, van Huy Mai, Pascale Auban-Senzier, Claude Pasquier, Kang Wang, et al.. Direct Evidence of Lithium Ion Migration in Resistive Switching of Lithium Cobalt Oxide Nanobatteries. Small, Wiley-VCH Verlag, In press, ⟨10.1002/smll.201801038⟩. ⟨hal-01799107⟩

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