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
Ultrathin 3V Spinel Clothed Layered Lithium‐Rich Oxides as Heterostructured Cathode for High‐Energy and High‐Power Li‐ion Batteries
Dai Liqin,Dai Liqin,Ning Li,Lai Chen,Yuefeng Su,Cheng-Meng Chen,Fangyuan Su,Liying Bao,Shi Chen,Feng Wu +9 more
Journal ArticleDOI
Rational design of Ti-based oxygen redox layered oxides for advanced sodium-ion batteries
TL;DR: Li et al. as mentioned in this paper proposed a Ti4+ (3d0)-based Na layered oxide, which features a cation-anion-coupled redox reaction based on the following four rational steps.
Journal ArticleDOI
Mg2+ Doping into Li Sites to Improve Anionic Redox Reversibility and Thermal Stability of Lithium-rich Manganese-based Oxides Cathode
TL;DR: In this article , a spray-drying method was used to synthesize Mg-doped layered oxides (LRMO) with a stable lattice structure and high reversibility of anionic redox reaction.
Journal ArticleDOI
Synthesis of Li-Rich Cathode Material with High C-Rate Performance by Reductive Treatment
TL;DR: Li-rich cathode materials have intrinsically poor rate capability along with low electronic conductivity, which remain as unsolved drawbacks limiting their use in applications that require cathode material with layered structures as mentioned in this paper.
Journal ArticleDOI
A review on the electrochemical reaction of Li-rich layered oxide materials
TL;DR: In this article, a review based on existing research on the electrochemistry of Li-rich materials presents an introduction to the reaction mechanism, challenges and strategies and prospects, as well as an overview of the current state of the art.
References
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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.
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Journal ArticleDOI
Issues and challenges facing rechargeable lithium batteries
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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.