Journal ArticleDOI
Room-temperature single-phase Li insertion/extraction in nanoscale Li(x)FePO4.
Pierre Gibot,Montse Casas-Cabanas,Lydia Laffont,Stephane Levasseur,Philippe Carlach,Stéphane Hamelet,Jean-Marie Tarascon,Christian Masquelier +7 more
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TLDR
The feasibility to drive the well-established two-phase room-temperature insertion process in LiFePO4 electrodes into a single-phase one by modifying the material's particle size and ion ordering is reported.Abstract:
Classical electrodes for Li-ion technology operate by either single-phase or two-phase Li insertion/de-insertion processes, with single-phase mechanisms presenting some intrinsic advantages with respect to various storage applications. We report the feasibility to drive the well-established two-phase room-temperature insertion process in LiFePO4 electrodes into a single-phase one by modifying the material's particle size and ion ordering. Electrodes made of LiFePO4 nanoparticles (40 nm) formed by a low-temperature precipitation process exhibit sloping voltage charge/discharge curves, characteristic of a single-phase behaviour. The presence of defects and cation vacancies, as deduced by chemical/physical analytical techniques, is crucial in accounting for our results. Whereas the interdependency of particle size, composition and structure complicate the theorists' attempts to model phase stability in nanoscale materials, it provides new opportunities for chemists and electrochemists because numerous electrode materials could exhibit a similar behaviour at the nanoscale once their syntheses have been correctly worked out.read more
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Positive Electrode Materials for Li-Ion and Li-Batteries†
TL;DR: In this article, positive electrodes for Li-ion and lithium batteries have been under intense scrutiny since the advent of the Li ion cell in 1991, and a growing interest in developing Li−sulfur and Li−air batteries that have the potential for vastly increased capacity and energy density, which is needed to power large scale systems.
Journal ArticleDOI
Functional Materials for Rechargeable Batteries
TL;DR: Recent progress in functional materials applied in the currently prevailing rechargeable lithium-ion, nickel-metal hydride, lead acid, vanadium redox flow, and sodium-sulfur batteries is reviewed.
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Recent advances in rechargeable battery materials: a chemist’s perspective
TL;DR: In this tutorial review, the most recent and significant scientific advances in the field of rechargeable batteries, whose performance is dependent on their underlying chemistry, are covered and special emphasis is given to progress in lithium-based technologies.
Journal ArticleDOI
Development and challenges of LiFePO4 cathode material for lithium-ion batteries
Lixia Yuan,Zhaohui Wang,Wu Xing Zhang,Xian Luo Hu,Ji Tao Chen,Yunhui Huang,John B. Goodenough +6 more
TL;DR: LiFePO4 is a competitive candidate of cathode material for the next generation of a green and sustainable lithium-ion battery system due to its long life span, abundant resources, low toxicity, and high thermal stability.
Journal ArticleDOI
Polyanionic (phosphates, silicates, sulfates) frameworks as electrode materials for rechargeable Li (or Na) batteries.
TL;DR: For more than 20 years, most of the technological achievements for the realization of positive electrodes for practical rechargeable Li battery systems have been devoted to transition metal oxides such as LixMO2 (M = Co, Ni, Mn), LixMn2O4, LixV2O5, or LIXV3O8.
References
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TL;DR: A brief historical review of the development of lithium-based rechargeable batteries is presented, ongoing research strategies are highlighted, and the challenges that remain regarding the synthesis, characterization, electrochemical performance and safety of these systems are discussed.
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Recent advances in magnetic structure determination by neutron powder diffraction
TL;DR: In this article, the main formulas governing the analysis of the Bragg magnetic scattering are summarized and shortly discussed and the method of profile fitting without a structural model to get precise integrated intensities and refine the propagation vector(s) of the magnetic structure is discussed.
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Phospho‐olivines as Positive‐Electrode Materials for Rechargeable Lithium Batteries
TL;DR: In this article, the authors showed that a reversible loss in capacity with increasing current density appears to be associated with a diffusion-limited transfer of lithium across the two-phase interface.
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Rietveld refinement of Debye–Scherrer synchrotron X‐ray data from Al2O3
TL;DR: In this paper, the application of the Rietveld refinement technique to synchrotron X-ray data collected from a capillary sample of Al2O3 in Debye-Scherrer geometry is described.
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Atomic-scale investigation of defects, dopants, and lithium transport in the LiFePO4 olivine-type battery material
TL;DR: In this paper, the authors investigated the intrinsic defects, dopant incorporation, and lithium ion migration in the LiFePO4 electrode material using well-established atomistic modeling techniques.