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
Disordered Cubic Spinel Structure in the Delithiated Li2MnO3 Revealed by Difference Pair Distribution Function Analysis
TL;DR: Li et al. as mentioned in this paper conducted a comprehensive analysis with a focus on PDF analysis in combination with the X-ray powder diffraction (XRPD), transmission electron microscopy (TEM), and Xray absorption spectroscopy (XAS) to reveal the disordered crystalline structure of the electrochemically delithiated Li2MnO3.
Journal ArticleDOI
Pairing Cross-Linked Polyviologen with Aromatic Amine Host Structure for Anion Shuttle Rechargeable Batteries
Vincent Cadiou,Vincent Cadiou,Anne-Claire Gaillot,Elise Deunf,Franck Dolhem,Lionel Dubois,Thibaut Gutel,Philippe Poizot +7 more
TL;DR: The synthesis and the electrochemical behavior of both Mg/Li salts of 2,5-(dianilino)terephthalate and Li2DAnT and cross-linked polyviologen and c-PV2+ are reported that can reversibly uptake/extract anions at different working potentials enabling the assembly of full anionic organic batteries.
Journal ArticleDOI
Anionic Oxygen Redox in the High-Lithium Material Li8SnO6
Ningjing Luo,Zhufeng Hou,Cheng Zheng,Yongfan Zhang,Andreas Stein,Shuping Huang,Donald G. Truhlar +6 more
TL;DR: Lithiated transition metal oxide cathode materials that combine oxygen-anion redox [O 2 −/(O 2 n−] with cation redox offer substantial capacities and higher voltage than cathodes without oxygen redox,...
Journal ArticleDOI
Probing cation intermixing in Li2SnO3
Zhong Wang,Yang Ren,Tianyuan Ma,Weidong Zhuang,Shigang Lu,Gui-Liang Xu,Ali Abouimrane,Khalil Amine,Zonghai Chen +8 more
TL;DR: In this paper, the structural evolution of materials during the solid-state synthesis of Li2MnO3 was studied using in situ high-energy X-ray diffraction.
Journal ArticleDOI
A first-principles study of bulk and surface Sn-doped LiFePO4 : The role of intermediate valence component in the multivalent doping
Lianxi Hou,Guohua Tao +1 more
TL;DR: Li et al. as mentioned in this paper performed ab initio density functional theory (DFT) with the generalized gradient approximation (GGA) + U calculations on both bulk and surface Sn-doped LiFePO4.
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.