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
Enhance performances of Co-free Li-rich cathode by eutesctic melting salt treatment
Xinping Qiu,He Zhao,He Zhao,Mo Chu,Wenting Li,Jinxing Li,Jinxing Li,Hanying Xu,Chao Zhang,Chao Zhang,Jie Li,Ce Han,Zelin Li,Zelin Li,Mo Chu,Xinping Qiu +15 more
TL;DR: Li et al. as discussed by the authors developed a novel eutectic melting salt treatment strategy to ameliorate the anionic redox reactions and lead to oxygen release, which incurs voltage fading and capacity decay.
Journal ArticleDOI
Extending the limits of powder diffraction analysis: Diffraction parameter space, occupancy defects, and atomic form factors
Liang Yin,Gerard S. Mattei,Zhou Li,Jianming Zheng,Wengao Zhao,Fredrick Omenya,Chengcheng Fang,Wangda Li,Jianyu Li,Qiang Xie,Ji-Guang Zhang,M. Stanley Whittingham,Ying Shirley Meng,Arumugam Manthiram,Peter G. Khalifah +14 more
TL;DR: Improved approaches capable of detecting occupancy defects with an exceptional sensitivity in the class of layered NMC (Li[NixMnyCoz]O2) Li-ion battery cathode materials have been developed and a systematic error in the synchrotron results was identified using f* diagrams for a series of NMC compounds.
Journal ArticleDOI
Li-rich layered oxide coated by nanoscale MoOx film with oxygen vacancies and lower oxidation state as a high-performance cathode material
TL;DR: Li-rich layered cathode material (Li1.2Ni0.13Co0.54O2) was successfully coated with an amorphous MoOx modification layer, and a spinel phase was induced on the interlayer between the bulk material and the cladding layer, which was characterized by XRD, SEM, XPS and TEM as mentioned in this paper.
Journal ArticleDOI
Controlling Covalency and Anion Redox Potentials through Anion Substitution in Li-Rich Chalcogenides
Andrew J. Martinolich,Joshua J. Zak,David N. Agyeman-Budu,Seong Shik Kim,Nicholas H. Bashian,Ahamed Irshad,Sri R. Narayan,Brent C. Melot,Johanna Nelson Weker,Kimberly A. See +9 more
TL;DR: In this paper, the development of next-generation battery technologies is imperative in the pursuit of a clean energy future, and battery chemistries capable of multielectron redox processes are at the f...
Journal ArticleDOI
CO oxidation over MOx (M = Mn, Fe, Co, Ni, Cu) supported on SmMn2O5 composite catalysts
TL;DR: In this paper, an alternative approach to composite catalyst formation by loading non-precious metal oxides MOx (M = Mn, Fe, Co, Ni, Cu) onto SMO mullite for CO oxidation is presented.
References
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Journal ArticleDOI
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