Journal ArticleDOI
Electrochemical Properties of Lithium Vanadium Phosphate as a Cathode Material for Lithium-Ion Batteries
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TLDR
In this paper, the properties of monoclinic lithium vanadium phosphate Li 3 V 2 (PO 4 ) 3 were investigated using X-ray diffraction (XRD) and electrochemical methods.Abstract:
The properties of the monoclinic lithium vanadium phosphate Li 3 V 2 (PO 4 ) 3 are investigated using X-ray diffraction (XRD) and electrochemical methods. Electrochemical measurements conducted in half-cells with Li 3 V 2 (PO 4 ) 3 as the cathode material and lithium metal as the anode have shown that this material exhibits an excellent reversibility when the charge extracted is confined to that equivalent to two lithiums per formula unit. The extraction of the last lithium is observed at a potential greater than 4.6 V vs. Li/Li + and involves a significant overvoltage. Upon discharge, however, XRD has shown that the original structure is recovered.read more
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Lithium Batteries and Cathode Materials
TL;DR: This paper will describe lithium batteries in more detail, building an overall foundation for the papers that follow which describe specific components in some depth and usually with an emphasis on the materials behavior.
Journal ArticleDOI
Metal Oxides and Oxysalts as Anode Materials for Li Ion Batteries
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Voltage, stability and diffusion barrier differences between sodium-ion and lithium-ion intercalation materials
Shyue Ping Ong,Vincent Chevrier,Geoffroy Hautier,Anubhav Jain,Charles J. Moore,Sangtae Kim,Xiaohua Ma,Gerbrand Ceder +7 more
TL;DR: In this paper, the difference between Na-ion and Li-ion based intercalation chemistries in terms of three key battery properties, voltage, phase stability and diffusion barriers was compared.
Voltage, Stability and Diffusion Barrier Differences between Sodium-ion and Lithium-ion intercalation Materials
Shyue Ping Ong,Vincent Chevrier,Anubhav Jain,Geoffroy Hautier,Charles J. Moore,Sangtae Kim,Xiaohua Ma,Gerbrand Ceder +7 more
Abstract: To evaluate the potential of Na-ion batteries, we contrast in this work the difference between Na-ion and Li-ion based intercalation chemistries in terms of three key battery properties—voltage, phase stability and diffusion barriers. The compounds investigated comprise the layered AMO2 and AMS2 structures, the olivine and maricite AMPO4 structures, and the NASICON A3V2(PO4)3 structures. The calculated Na voltages for the compounds investigated are 0.18–0.57 V lower than that of the corresponding Li voltages, in agreement with previous experimental data. We believe the observed lower voltages for Na compounds are predominantly a cathodic effect related to the much smaller energy gain from inserting Na into the host structure compared to inserting Li. We also found a relatively strong dependence of battery properties on structural features. In general, the difference between the Na and Li voltage of the same structure, DVNa–Li, is less negative for the maricite structures preferred by Na, and more negative for the olivine structures preferred by Li. The layered compounds have the most negative DVNa–Li. In terms of phase stability, we found that open structures, such as the layered and NASICON structures, that are better able to accommodate the larger Na+ ion generally have both Na and Li versions of the same compound. For the close-packed AMPO4 structures, our results show that Na generally prefers the maricite structure, while Li prefers the olivine structure, in agreement with previous experimental work. We also found surprising evidence that the barriers for Na+ migration can potentially be lower than that for Li+ migration in the layered structures. Overall, our findings indicate that Na-ion systems can be competitive with Li-ion systems.
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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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Journal ArticleDOI
Lithium-ion rechargeable batteries
Sid Megahed,Bruno Scrosati +1 more
TL;DR: In this paper, the authors describe the properties of the anode, cathode and electrolyte materials which presently seem to be the most promising for the development of these batteries, and evaluate the impact that the rockingchair concept may ultimately have on the progress of rechargeable lithium battery technology.
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Cathode materials for lithium rocking chair batteries
TL;DR: In this article, a comparison between specific capacities and rechargeability of lithium-containing high voltage cathode materials such as manganese oxides and LiMO2 compounds, where M is Co or Ni.
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Synthesis, redox potential evaluation and electrochemical characteristics of NASICON-related-3D framework compounds
K. S. Nanjundaswamy,A. K. Padhi,John B. Goodenough,Shigeto Okada,Hideaki Ohtsuka,Hajime Arai,Jun-Ichi Yamaki +6 more
TL;DR: In this paper, the authors synthesized and electrochemically characterized the framework compounds M2(SO4)3 with M = (Ti Fe), (V Fe), Fe, Fe and LixM2(PO4) 3 with Lix
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A comprehensive study of trivalent tungstates and molybdates of the type L2(MO4)3
TL;DR: In this paper, some 66 compounds of rare earth and other trivalent ions of the types L 2 WO4)3 and L 2 MoO4 3 have been studied by means of X-ray powder diffraction, differential thermal analysis, and thermogravimetric analysis.
Journal ArticleDOI
Electrochemical Potential Spectroscopy: A New Electrochemical Measurement
TL;DR: In this paper, a new electrochemical technique is described that involves applying a series of constant potential steps to an electrochemical cell, allowing the cell to attain quasi open-circuit conditions by letting the current decay to a small, but finite, value.