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
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Journal ArticleDOI
Nanosized Lithium-Rich Cobalt Oxide Particles and Their Transformation to Lithium Cobalt Oxide Cathodes with Optimized High-Rate Morphology
Peter M. Zehetmaier,Arnaud Cornélis,Florian Zoller,Florian Zoller,Bernhard Böller,Andreas Wisnet,Markus Döblinger,Daniel Böhm,Thomas Bein,Dina Fattakhova-Rohlfing,Dina Fattakhova-Rohlfing +10 more
TL;DR: In this article, the formation of crystalline dispersible LixCo1-xOy (with y⩽1) nanoparticles with an unusual rock-salt phase containing ∼15 at. % Li in the crystalline structure was reported.
Journal ArticleDOI
Self-standing Li1.2Mn0.6Ni0.2O2/graphene membrane as a binder-free cathode for Li-ion batteries
TL;DR: In this paper, a self-standing Li1.2Mn0.6Ni0.2O2/graphene membrane was synthesized as a binder-free cathode for Li-ion batteries.
Journal ArticleDOI
Electrochemical properties and lithium ion diffusion in Li4FeSbO6 studied by first principle
TL;DR: Li4FeSbO6 is a new Li-rich layered oxide material with antiferromagnet honeycomb structure as mentioned in this paper, which has attracted considerable attention as the next generation of Li-ion batteries.
Journal ArticleDOI
Universal solid-state oxygen redox in antifluorite lithium oxides via transition metal doping
Hiroaki Kobayashi,Tetsuya Makimoto,Yoshiyuki Ogasawara,Kosuke Harada,Masanobu Nakayama,Mitsuhiro Hibino,Tetsuichi Kudo,Noritaka Mizuno,Kazuya Yamaguchi +8 more
TL;DR: In this paper, a reversible solid-state oxygen redox in antifluorite lithium oxide via doping of Ni was demonstrated, with a reversible capacity of 270 mA h g−1.
Journal ArticleDOI
A New Class of Ternary Compound for Lithium-Ion Battery: from Composite to Solid Solution
Jiali Wang,Jiali Wang,Hailong Wu,Yanhua Cui,Shengzhou Liu,Xiaoqing Tian,Yixiu Cui,Xiaojiang Liu,Yin Yang +8 more
TL;DR: It is revealed that higher Sn content benefits cycling stability of the system because Sn4+ ions with larger sizes could partially block the migration of Mn4+ and Ru4+ from transition metal layer to Li layer, thus suppressing structural transformation of theSystem evolves from layered-to-spinel phase with increasing Ru content.
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
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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.