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
Revealing the Dual Surface Reactions on a HE-NCM Li-Ion Battery Cathode and Their Impact on the Surface Chemistry of the Counter Electrode.
TL;DR: These results demonstrate that a dual reaction takes place at the HE-NCM-electrolyte interface if subject to high potential, namely, degradation of the surface structure and decomposition of the electrolyte, affecting directly the anode surface through the migration-diffusion processes.
Journal ArticleDOI
Redox active materials for metal compound based hybrid electrochemical energy storage: a perspective view
Tuyen Nguyen,M. Fátima Montemor +1 more
TL;DR: In this article, metal compound based hybrid electrochemical energy storage (HEES) is proposed as a highly promising solution to provide enhanced storage capacity and high power performance properties of metal compound-based redox active electrodes, including chemical composition, morphology, crystal structure and conductivity govern the performance of storage devices.
Journal ArticleDOI
Strain engineering by atomic lattice locking in P2-type layered oxide cathode for high-voltage sodium-ion batteries
Ying Yang,Yuzhang Feng,Zhuo Chen,Yiming Feng,Qun Huang,Cheng Ma,Qingbing Xia,Chaoping Liang,Liangjun Zhou,M. Saiful Islam,Peng Wang,Liang Zhou,Liqiang Mai,Weifeng Wei +13 more
TL;DR: In this paper, an interlocking spinel-like/layered heterostructure via boric acid treatment approach was constructed to prevent the accumulation of inhomogeneous interlaminar stress as well as the lattice distortion.
Journal ArticleDOI
Competition between Metal Dissolution and Gas Release in Li-Rich Li3RuyIr1–yO4 Model Compounds Showing Anionic Redox
Quentin Jacquet,Quentin Jacquet,Quentin Jacquet,Antonella Iadecola,Matthieu Saubanère,Louis Lemarquis,Erik J. Berg,Daniel Alves Dalla Corte,Daniel Alves Dalla Corte,Gwenaëlle Rousse,Gwenaëlle Rousse,Gwenaëlle Rousse,Marie-Liesse Doublet,Jean-Marie Tarascon,Jean-Marie Tarascon,Jean-Marie Tarascon +15 more
TL;DR: Li et al. as mentioned in this paper proposed a degradation mechanism for a cathode material showing anionic redox, namely the dissolution of Ru forming RuO4/RuO4 species with limited release of gas from the material.
Journal ArticleDOI
Trace level doping of lithium-rich cathode materials
Miklos Lengyel,Kuan-Yu Shen,Deanna Lanigan,Jonathan Martin,Xiaofeng Zhang,Richard L. Axelbaum +5 more
TL;DR: In this article, Li2MnO3·(1−x)Li(Ni 1/3Mn1/3Co 1/5)O2 has been used for spray pyrolysis to prevent voltage fade.
References
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Journal ArticleDOI
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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
Building better batteries
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