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
Structural Evolution and Redox Processes Involved in the Electrochemical Cycling of P2–Na0.67[Mn0.66Fe0.20Cu0.14]O2
TL;DR: In this paper, the synthesis and structural evolution of P2−Na0.14O2 during charge and discharge as a positive electrode for Na-ion batteries was reported. But the authors did not consider the high voltage phase.
Journal ArticleDOI
Anionic redox chemistry in Na-rich Na2Ru1 − ySnyO3 positive electrode material for Na-ion batteries
Patrick Rozier,Patrick Rozier,Mariyappan Sathiya,Mariyappan Sathiya,Alagar Raj Paulraj,Dominique Foix,Dominique Foix,Thomas Desaunay,Thomas Desaunay,Pierre-Louis Taberna,Pierre-Louis Taberna,Patrice Simon,Patrice Simon,Jean-Marie Tarascon,Jean-Marie Tarascon +14 more
TL;DR: In this paper, the synthesis and Na- electrochemical activity of Na-rich layered Na2Ru1−ySnyO3 compounds is reported Like their Li-analogue, Na 2Ru 1−YSny O3 shows capacities that exceed theoretical capacity calculated from the cationic redox species.
Journal ArticleDOI
Exploring the bottlenecks of anionic redox in Li-rich layered sulfides
Sujoy Saha,Sujoy Saha,Sujoy Saha,Gaurav Assat,Gaurav Assat,Gaurav Assat,Moulay Tahar Sougrati,Dominique Foix,Haifeng Li,Jean Vergnet,Jean Vergnet,Jean Vergnet,Soma Turi,Yang Ha,Wanli Yang,Jordi Cabana,Gwenaëlle Rousse,Gwenaëlle Rousse,Gwenaëlle Rousse,Artem M. Abakumov,Jean-Marie Tarascon,Jean-Marie Tarascon,Jean-Marie Tarascon +22 more
TL;DR: In this paper, Li-rich layered sulfides Li1.33 -2y/3Ti0.67 -Y/3FeyS2 were designed to achieve sustained reversible capacities of ~245 mAh g−1 due to cumulated cationic (Fe2+/3+) and anionic (S2−/Sn−, n < 2) redox processes.
Journal ArticleDOI
Sn-stabilized Li-rich layered Li(Li0.17Ni0.25Mn0.58)O2 oxide as a cathode for advanced lithium-ion batteries
TL;DR: Li-rich layered oxides have been intensively investigated as cathodes for high energy lithium-ion batteries as discussed by the authors, however, oxygen loss from the lattice during the initial charge and gradual structural transformation during cycling can lead to capacity degradation and potential decay of the cathode materials.
Journal ArticleDOI
Conflicting Roles of Anion Doping on the Electrochemical Performance of Li-Ion Battery Cathode Materials
Fantai Kong,Chaoping Liang,Roberto C. Longo,Dong Hee Yeon,Yongping Zheng,Jin Hwan Park,Seok-Gwang Doo,Kyeongjae Cho +7 more
TL;DR: In this paper, the effects of three common anion dopants (F, S, Cl) on a model cathode material, LiNiO2, including redox potential, ionic conductivity, Li/Ni exchange, lattice distortion, and Ni migration upon delithiation, were investigated.
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.