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
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The path towards sustainable energy
Steven Chu,Yi Cui,Nian Liu +2 more
TL;DR: Research in materials science is contributing to progress towards a sustainable future based on clean energy generation, transmission and distribution, the storage of electrical and chemical energy, energy efficiency, and better energy management systems.
Journal ArticleDOI
Activating lattice oxygen redox reactions in metal oxides to catalyse oxygen evolution
Alexis Grimaud,Oscar Diaz-Morales,Binghong Han,Wesley T. Hong,Yueh-Lin Lee,Livia Giordano,Livia Giordano,Kelsey A. Stoerzinger,Marc T. M. Koper,Yang Shao-Horn +9 more
TL;DR: Using in situ 18O isotope labelling mass spectrometry, direct experimental evidence is provided that the O2 generated during the OER on some highly active oxides can come from lattice oxygen.
Journal ArticleDOI
Water-Lubricated Intercalation in V 2 O 5 ·nH 2 O for High-Capacity and High-Rate Aqueous Rechargeable Zinc Batteries.
Mengyu Yan,Mengyu Yan,Pan He,Ying Chen,Shanyu Wang,Qiulong Wei,Kangning Zhao,Xu Xu,Qinyou An,Yi Shuang,Yuyan Shao,Karl T. Mueller,Liqiang Mai,Jun Liu,Jihui Yang +14 more
TL;DR: The results suggest that the H2 O-solvated Zn2+ possesses largely reduced effective charge and thus reduced electrostatic interactions with the V2 O5 framework, effectively promoting its diffusion.
Journal ArticleDOI
The structural and chemical origin of the oxygen redox activity in layered and cation-disordered Li-excess cathode materials
Dong-Hwa Seo,Jinhyuk Lee,Jinhyuk Lee,Alexander Urban,Rahul Malik,ShinYoung Kang,Gerbrand Ceder,Gerbrand Ceder,Gerbrand Ceder +8 more
TL;DR: It is demonstrated how very specific local Li-excess environments around oxygen atoms necessarily lead to labile oxygen electrons that can be more easily extracted and participate in the practical capacity of cathodes.
Journal ArticleDOI
Nickel-Rich and Lithium-Rich Layered Oxide Cathodes: Progress and Perspectives
TL;DR: Li-rich layered oxides have attracted much research interest as cathodes for Li-ion batteries due to their low cost and higher discharge capacities compared to those of LiCoO2 and LiMn2O4 as mentioned in this paper.
References
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Journal ArticleDOI
Identification of cathode materials for lithium batteries guided by first-principles calculations
TL;DR: In this paper, first-principles calculations are used to identify a large class of new candidate materials in which non-transition metals are substituted for transition metals, based on the assumption that oxygen, rather than transition metal ions, function as the electron acceptor upon insertion of Li.
Journal ArticleDOI
The significance of the Li2MnO3 component in ‘composite’ xLi2MnO3 · (1 − x)LiMn0.5Ni0.5O2 electrodes
Christopher S. Johnson,J.-S. Kim,Christina Lefief,Naichao Li,John T. Vaughey,Michael M. Thackeray +5 more
TL;DR: In this paper, the performance of 0.3Li 2 MnO 3, 0.7LiMn 0.5 Ni 0.35 O 2 composite electrodes was compared with the behavior of electrodes that were preconditioned by acid treatment, showing that acid treatment significantly reduces the coulombic inefficiency of the initial charge/discharge cycle of the cells.
Journal ArticleDOI
Synthesis, Characterization and Electrochemistry of Lithium Battery Electrodes: xLi2MnO3·(1 − x)LiMn0.333Ni0.333Co0.333O2 (0 ≤ x ≤ 0.7)
TL;DR: In this article, the synthesis, structural and electrochemical characterization of xLi2MnO3·(1 − x)LiMn0.33Ni0.233Co0.333O2 electrodes over a wide compositional range is explored.
Journal ArticleDOI
Comments on the structural complexity of lithium-rich Li1+xM1−xO2 electrodes (M = Mn, Ni, Co) for lithium batteries☆
TL;DR: In this article, the complexity of intergrown and disordered LiMO 2 systems with trivalent cobalt and tetravalent manganese and divalent nickel was discussed.
Journal ArticleDOI
High Performance Li2Ru1–yMnyO3 (0.2 ≤ y ≤ 0.8) Cathode Materials for Rechargeable Lithium-Ion Batteries: Their Understanding
Mariyappan Sathiya,Kannadka Ramesha,Gwenaëlle Rousse,Dominique Foix,Danielle Gonbeau,Annigere S. Prakash,Marie-Liesse Doublet,K. Hemalatha,Jean-Marie Tarascon +8 more
TL;DR: In this paper, the authors investigated the origin of the high capacity displayed by Li2MnO3-LiMO2 (M = Ni, Co) composites and proposed a complete solid solution with the 0.4 ≤ y ≤ 0.6 members showing sustainable reversible capacities exceeding 220 mAh·g −1 centered around 3.6 V vs Li+/Li.