Journal ArticleDOI
Reversible anionic redox chemistry in high-capacity layered-oxide electrodes
Mariyappan Sathiya,Gwenaëlle Rousse,Kannadka Ramesha,C.P. Laisa,Hervé Vezin,Moulay Tahar Sougrati,Moulay Tahar Sougrati,Marie-Liesse Doublet,Dominique Foix,Danielle Gonbeau,Danielle Gonbeau,Wesley Walker,Annigere S. Prakash,M. Ben Hassine,M. Ben Hassine,Loic Dupont,Loic Dupont,Jean-Marie Tarascon,Jean-Marie Tarascon +18 more
TLDR
In this article, the reactivity of a class of high-capacity oxides with a single redox cation has been investigated and it has been shown that these oxides exhibit sustainable reversible capacities as high as 230 mAh/g−1 and good cycling behavior with no signs of voltage decay.Abstract:
Li-ion batteries have contributed to the commercial success of portable electronics and may soon dominate the electric transportation market provided that major scientific advances including new materials and concepts are developed. Classical positive electrodes for Li-ion technology operate mainly through an insertion-deinsertion redox process involving cationic species. However, this mechanism is insufficient to account for the high capacities exhibited by the new generation of Li-rich (Li1+xNiyCozMn(1−x−y−z)O2) layered oxides that present unusual Li reactivity. In an attempt to overcome both the inherent composition and the structural complexity of this class of oxides, we have designed structurally related Li2Ru1−ySnyO3 materials that have a single redox cation and exhibit sustainable reversible capacities as high as 230 mA h g−1. Moreover, they present good cycling behaviour with no signs of voltage decay and a small irreversible capacity. We also unambiguously show, on the basis of an arsenal of characterization techniques, that the reactivity of these high-capacity materials towards Li entails cumulative cationic (Mn+→M(n+1)+) and anionic (O2−→O22−) reversible redox processes, owing to the d-sp hybridization associated with a reductive coupling mechanism. Because Li2MO3 is a large family of compounds, this study opens the door to the exploration of a vast number of high-capacity materials.read more
Citations
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Journal ArticleDOI
Anionic redox behaviors of layered Li-rich oxide cathodes
TL;DR: In this paper, the authors reviewed the investigation of the structure and electrochemical behavior for LRMO in recent years, especially the reaction of anionic redox that is the origin of the high capacity of LRMO.
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A Glance of the Layered Transition Metal Oxide Cathodes in Sodium and Lithium-ion Batteries: Difference and Similarities.
TL;DR: In this article, a minireview summarizes some typical cases where Li and Na-ion differ in layered cathode materials and discusses potential approaches to leverage their similarities and dissimilarities.
Journal ArticleDOI
The Decay Mechanism Related to Structural and Morphological Evolution in Lithium-Rich Cathode Materials for Lithium-Ion Batteries.
TL;DR: Li-rich oxides have garnered intense interest recently for their excellent capacity in rechargeable Li-ion batteries (LIBs), but the poor cycling stability and capacity degradation during the cycling process impede their practical application.
Journal ArticleDOI
Multiscale Investigation into the Co-Doping Strategy on the Electrochemical Properties of Li2RuO3 Cathodes for Li-Ion Batteries
Journal ArticleDOI
Cation-Disorder-Assisted Reversible Topotactic Phase Transition between Antifluorite and Rocksalt Toward High-Capacity Lithium-Ion Batteries.
Hiroaki Kobayashi,Takashi Tsukasaki,Yoshiyuki Ogasawara,Mitsuhiro Hibino,Tetsuichi Kudo,Noritaka Mizuno,Itaru Honma,Kazuya Yamaguchi +7 more
TL;DR: A reversible three-electron reaction is demonstrated utilizing topotactic phase transition between antifluorite and rocksalt in a cation-disordered antiffluorite-type cubic Li6CoO4 cathode, occurring without O2 gas evolution.
References
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Journal ArticleDOI
Generalized Gradient Approximation Made Simple
TL;DR: A simple derivation of a simple GGA is presented, in which all parameters (other than those in LSD) are fundamental constants, and only general features of the detailed construction underlying the Perdew-Wang 1991 (PW91) GGA are invoked.
Journal ArticleDOI
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TL;DR: An efficient scheme for calculating the Kohn-Sham ground state of metallic systems using pseudopotentials and a plane-wave basis set is presented and the application of Pulay's DIIS method to the iterative diagonalization of large matrices will be discussed.
Journal ArticleDOI
Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides
TL;DR: The effective ionic radii of Shannon & Prewitt [Acta Cryst. (1969), B25, 925-945] are revised to include more unusual oxidation states and coordinations as mentioned in this paper.
Journal ArticleDOI
Issues and challenges facing rechargeable lithium batteries
TL;DR: A brief historical review of the development of lithium-based rechargeable batteries is presented, ongoing research strategies are highlighted, and the challenges that remain regarding the synthesis, characterization, electrochemical performance and safety of these systems are discussed.
Journal ArticleDOI
Building better batteries
TL;DR: Researchers must find a sustainable way of providing the power their modern lifestyles demand to ensure the continued existence of clean energy sources.