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
Multiscale and hierarchical reaction mechanism in a lithium-ion battery
TL;DR: In this article , the results of research on the temporal and spatial hierarchical structure of lithium-ion batteries, focusing on operando measurements taken during charge-discharge reactions are presented.
Journal ArticleDOI
Oxygen redox promoted by Na excess and covalency in hexagonal and monoclinic Na2−xRuO3 polymorphs
M. H. N. Assadi,Masashi Okubo,Masashi Okubo,Atsuo Yamada,Atsuo Yamada,Yoshitaka Tateyama,Yoshitaka Tateyama +6 more
Journal ArticleDOI
A theoretical and experimental study of hexagonal molybdenum trioxide as dual-ion electrode for rechargeable magnesium battery
Marta Cabello,Alejandro Medina,Ricardo Alcántara,Francisco Nacimiento,Carlos Pérez-Vicente,José L. Tirado +5 more
TL;DR: In this paper, a divalent cation was inserted into the hexagonal polytype of molybdenum trioxide (h-MoO3) through the hydrothermal method.
Journal ArticleDOI
Layered Li2RuO3-LiCoO2 composite as high-performance cathode materials for lithium-ion batteries
Ling Ming Zhang,Xing Bo Wang,Shi Tao,Gui Xian Wu,Xiao Zhi Su,Shi Qiang Wei,Haifeng Zhao,Wangsheng Chu +7 more
TL;DR: In this article, a layer-structured Li2RuO3-LiM'O-2 composite was synthesized by the solid-state reaction method, which not only serves as the electrochemical active phase providing large reversible capacity but also improves the structural stability of layered LiCoO2 at high potential.
Journal ArticleDOI
Electrochemical and Thermal Behavior of Modified Li and Mn‐Rich Cathode Materials in Battery Prototypes: Impact of Pentasodium Aluminate Coating and Comprehensive Understanding of Its Evolution upon Cycling through Solid‐State Nuclear Magnetic Resonance Analysis
Hadar Sclar,Sandipan Maiti,Nicole Leifer,Noam Vishkin,Miryam Fayena-Greenstein,Meital Hen,Judith Grinblat,Michael Talianker,Nickolay Solomatin,Ortal Tiurin,Maria Tkachev,Yair Ein-Eli,Gil Goobes,Boris Markovsky,Doron Aurbach +14 more
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
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set.
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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.