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
More filters
Journal ArticleDOI
Enhancing the Reversibility of Lattice Oxygen Redox Through Modulated Transition Metal–Oxygen Covalency for Layered Battery Electrodes
Chen Cheng,Chi Chen,Shi Chen Chu,Haolv Hu,Tian Yan,Xiaoxing Xia,Xuefei Feng,Jinghua Guo,Dan Sun,Jinpeng Wu,Shaohua Guo,Liang Zhang +11 more
TL;DR: In this article , the reversibility of lattice oxygen redox (OR) was improved through modulating transition metal-oxygen covalency for layered electrode of Naion batteries.
Journal ArticleDOI
Lithium Rich Composition of Li2RuO3 and Li2Ru1-xIrxO3 Layered Materials as Li-Ion Battery Cathode
Journal ArticleDOI
Oxygen Activity in Li-Rich Disordered Rock-Salt Oxideand the Influence of LiNbO 3 Surface Modification on theElectrochemical Performance
Musa Ali Cambaz,B. P. Vinayan,Holger Geßwein,Alexander Schiele,Angelina Sarapulova,Thomas Diemant,Andrey Mazilkin,Andrey Mazilkin,Torsten Brezesinski,R. Jürgen Behm,Helmut Ehrenberg,Maximilian Fichtner +11 more
TL;DR: Li-rich disordered rock-salt oxides such as Li1.2Ni1/3Ti 1/3Mo2/15O2 are receiving increasing attention as high capacity cathodes due to their potential as high energy materials with variable elemen as discussed by the authors.
Journal ArticleDOI
Structural and Thermodynamic Understandings in Mn-Based Sodium Layered Oxides during Anionic Redox.
Seok Mun Kang,Duho Kim,Kug-Seung Lee,Min Seob Kim,Aihua Jin,Jae Hyuk Park,Chi-Yeong Ahn,Tae Yeol Jeon,Young Hwa Jung,Seung Ho Yu,Junyoung Mun,Yung-Eun Sung +11 more
TL;DR: A critical role of the anion‐redox‐induced two‐phase reaction in the positive‐negative point of view is demonstrated, suggesting a rational design principle considering the phase separation and lattice mismatch, and provide an exciting approach for utilizing the high‐voltage feature in Mn‐based layered cathode materials that are charge‐compensated by an anionic redox reaction.
Journal ArticleDOI
Li2SnO3 as a Cathode Material for Lithium-ion Batteries: Defects, Lithium Ion Diffusion and Dopants.
TL;DR: The electronic structure calculations show that the introduction of Al will not introduce levels in the band gap and subvalent doping by Al on the Sn site is energetically favourable and is proposed to be an efficient way to increase the Li content in Li2SnO3.
References
More filters
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.
Georg Kresse,Jürgen Furthmüller +1 more
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.