Facile formulation and fabrication of the cathode using a self-lithiated carbon for all-solid-state batteries.

Scientific Reports
N DelaporteK Zaghib

Abstract

We propose a innovative concept to boost the electrochemical performance of cathode composite electrodes using surface-modified carbons with hydrophilic moieties to increase their dispersion in a Lithium Nickel Manganese Cobalt Oxide (NMC) cathode and in-situ generate Li-rich carbon surfaces. Using a rapid aqueous process, the hydrophilic carbon is effectively dispersed in NMC particles followed by the conversion of its acid surface groups (e.g. -COOH), which interact with the NMC particles due to their basicity, into grafted Li salt (-COO-Li+). The solid-state batteries prepared using the cathode composites with surface-modified carbon exhibit better electrochemical performance. Such modified carbons led to a better electronic conduction path as well as facilitating Li+ ions transfer at the carbon/NMC interface due to the presence of lithiated carboxylate groups on their surface.

References

Apr 20, 2011·Chemical Society Reviews·Daniel Bélanger, Jean Pinson
Mar 22, 2012·Chemical Communications : Chem Comm·Susanne DörflerMichael J Hoffmann
Feb 3, 2016·Advanced Materials·Kun FuLiangbing Hu
Mar 18, 2016·Scientific Reports·Brandon LudwigHeng Pan
Dec 21, 2016·Nature Materials·Steven ChuNian Liu
Feb 26, 2020·Materials·Nicolas DelaporteKarim Zaghib
Mar 4, 2020·Scientific Reports·N DelaporteK Zaghib

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Methods Mentioned

BETA
confocal microscopy
nuclear magnetic resonance
X-ray

Software Mentioned

Nobilta

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