Review on Challenges and Recent Advances in the Electrochemical Performance of High Capacity Li- and Mn-Rich Cathode Materials for Li-Ion Batteries

Nayak, Prasant Kumar and Erickson, Evan M. and Schipper, Florian and Penki, Tirupathi Rao and Munichandraiah, Nookala and Adelhelm, Philipp and Sclar, Hadar and Amalraj, Francis and Markovsky, Boris and Aurbach, Doron (2018) Review on Challenges and Recent Advances in the Electrochemical Performance of High Capacity Li- and Mn-Rich Cathode Materials for Li-Ion Batteries. In: ADVANCED ENERGY MATERIALS, 8 (8).

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Abstract

Li and Mn-rich layered oxides, xLi(2)MnO(3)<bold></bold>(1-x)LiMO2 (M=Ni, Mn, Co), are promising cathode materials for Li-ion batteries because of their high specific capacity that can exceed 250 mA h g(-1). However, these materials suffer from high 1(st) cycle irreversible capacity, gradual capacity fading, low rate capability, a substantial charge-discharge voltage hysteresis, and a large average discharge voltage decay during cycling. The latter detrimental phenomenon is ascribed to irreversible structural transformations upon cycling of these cathodes related to potentials 4.5 V required for their charging. Transition metal inactivation along with impedance increase and partial layered-to-spinel transformation during cycling are possible reasons for the detrimental voltage fade. Doping of Li, Mn-rich materials by Na, Mg, Al, Fe, Co, Ru, etc. is useful for stabilizing capacity and mitigating the discharge-voltage decay of xLi(2)MnO(3)<bold></bold>(1-x)LiMO2 electrodes. Surface modifications by thin coatings of Al2O3, V2O5, AlF3, AlPO4, etc. or by gas treatment (for instance, by NH3) can also enhance voltage and capacity stability during cycling. This paper describes the recent literature results and ongoing efforts from our groups to improve the performance of Li, Mn-rich materials. Focus is also on preparation of cobalt-free cathodes, which are integrated layered-spinel materials with high reversible capacity and stable performance.

Item Type:	Journal Article
Publication:	ADVANCED ENERGY MATERIALS
Publisher:	Wiley-VCH Verlag
Additional Information:	Copy right for the article belong to WILEY-V C H VERLAG GMBH, POSTFACH 101161, 69451 WEINHEIM, GERMANY
Keywords:	capacity fading; doping; Li- and Mn-rich cathodes; Li-ion batteries; surface treatments; voltage decay
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	11 Apr 2018 19:57
Last Modified:	02 Aug 2022 05:24
URI:	https://eprints.iisc.ac.in/id/eprint/59518

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