Fluoride phosphate Li2CoPO4F as a high-voltage cathode in Li-ion batteries

Okada, Shigeto; Ueno, Masayasu; Uebou, Yasushi; Yamaki, Jun Ichi

doi:10.1016/j.jpowsour.2005.03.149

Cited by 134 publications

(132 citation statements)

References 7 publications

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“…LiOH, LiCl and monoethylene glycol (MEG) (99.5%) were purchased from Sigma-Aldrich, Co(OH) 2 and NH 4 F from Alfa Aesar, phosphoric acid (85 wt% solution), diethylene glycol (DEG) (99%) and glycerol (GCL) (99%) from Merck company. LiPF 6 (99.8%), fluoroethylene carbonate (99.5%) and dimethyl carbonate (98%) were purchased from KISHIDA CHEMICAL Co., Ltd.…”

Section: Methodsmentioning

confidence: 99%

A Two-Step Synthesis for Li₂CoPO₄F as High-Voltage Cathode Material

Schoiber

Berger

Yada

et al. 2015

J. Electrochem. Soc.

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Li 2 CoPO 4 F has been synthesized via a novel two-step reaction from a solvothermally prepared precursor mixture of LiCoPO 4 and LiF. Solvent influences were monitored by powder X-ray diffraction and the reaction conditions for the conversion of the precursor mixture to Li 2 CoPO 4 F were optimized. In addition, the obtained materials were characterized before and after carbon-coating by SEM, N 2 sorption, elemental and thermogravimetric analysis. The electrochemical performance of the products as high-voltage cathode materials in a coin-cell was tested, and long term stability over 50 charge/discharge cycles could be demonstrated.

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Section: Methodsmentioning

confidence: 99%

A Two-Step Synthesis for Li₂CoPO₄F as High-Voltage Cathode Material

Schoiber

Berger

Yada

et al. 2015

J. Electrochem. Soc.

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“…10b). It was presumed that this compound has a Ni 2+ /Ni 3+ redox couple above 5 V, because it did not show any electrochemical activity below 5 V, similar to that of other nickel phosphates such as LiNiPO 4 [74] and Li 2 NiPO 4 F [75]. Substitutional solid solutions such as Na 2 (Fe 1−x Mn x PO 4 )F (0 < x < 0.2) [76], Na 2 (Fe 1−x Co x )PO 4 F (0 < x < 1) and Na 2 (Fe 1−x Mg x )PO 4 F (x < 0.15) have also been prepared [77], but all presented minimal reversibility.…”

Section: Sodium Metal Fluorophosphatesmentioning

confidence: 98%

Electrode Materials for Sodium-Ion Batteries: Considerations on Crystal Structures and Sodium Storage Mechanisms

Wang

Shanmukaraj

et al. 2018

Electrochem. Energ. Rev.

245

122

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Sodium-ion batteries have been emerging as attractive technologies for large-scale electrical energy storage and conversion, owing to the natural abundance and low cost of sodium resources. However, the development of sodium-ion batteries faces tremendous challenges, which is mainly due to the difficulty to identify appropriate cathode materials and anode materials. In this review, the research progresses on cathode and anode materials for sodium-ion batteries are comprehensively reviewed. We focus on the structural considerations for cathode materials and sodium storage mechanisms for anode materials. With the worldwide effort, high-performance sodium-ion batteries will be fully developed for practical applications.

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“…In the last years, many attempts have been made to increase further the energy density of LIBs and cathode materials operating above 4.5 V versus Li/Li + have been proposed in the late 90's, such as LiNi0.5Mn1.5O4 [10,11], LiCoPO4 [12,13] or, more recently, LiCoPO4F [14,15]. However, the so-called '5 V'…”

Section: Introductionmentioning

confidence: 99%

Towards practical sulfolane based electrolytes: Choice of Li salt for graphite electrode operation

Zhang

Porcher

Paillard

2018

Journal of Power Sources

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Abstract:Sulfolane (tetramethylene sulfone, SL) is known for leading to Li-ion electrolytes with high anodic stability. However, the operation of graphite electrodes in alternative electrolytes is usually challenging, especially when ethylene carbonate (EC) is not used as co-solvent. Thus, we study here the influence of the lithium salt on the physico-chemical and electrochemical properties of EC-free SL-based electrolytes and on the performance of graphite electrodes based on carboxymethyl cellulose (CMC). SL mixed with dimethyl carbonate (DMC) leads to electrolytes as conductive as state-of-theart alkyl carbonate-based electrolytes with wide electrochemical stability windows. The compatibility with graphite electrodes depends on the Li salt used and, even though cycling is possible with most salts, lithium difluoro-oxalato borate (LiDFOB) is especially interesting for graphite operation.LiDFOB electrolytes are conductive at room temperature (ca. 6 mS cm -1 ) with an anodic stability slightly below 5 V vs. Li/Li + on particulate carbon black electrodes. In addition, it allows cycling graphite electrodes with steady capacity and high coulombic efficiency without any additive. The testing of graphite electrodes in half-cells is, however, problematic with SL:DMC mixtures and, by switching the Li metal counter electrode for LiFePO4, the graphite electrode achieves better practical performance in terms of rate capability.

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Fluoride phosphate Li2CoPO4F as a high-voltage cathode in Li-ion batteries

Cited by 134 publications

References 7 publications

A Two-Step Synthesis for Li₂CoPO₄F as High-Voltage Cathode Material

A Two-Step Synthesis for Li₂CoPO₄F as High-Voltage Cathode Material

Electrode Materials for Sodium-Ion Batteries: Considerations on Crystal Structures and Sodium Storage Mechanisms

Towards practical sulfolane based electrolytes: Choice of Li salt for graphite electrode operation

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Fluoride phosphate Li2CoPO4F as a high-voltage cathode in Li-ion batteries

Cited by 134 publications

References 7 publications

A Two-Step Synthesis for Li2CoPO4F as High-Voltage Cathode Material

A Two-Step Synthesis for Li2CoPO4F as High-Voltage Cathode Material

Electrode Materials for Sodium-Ion Batteries: Considerations on Crystal Structures and Sodium Storage Mechanisms

Towards practical sulfolane based electrolytes: Choice of Li salt for graphite electrode operation

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Product

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A Two-Step Synthesis for Li₂CoPO₄F as High-Voltage Cathode Material

A Two-Step Synthesis for Li₂CoPO₄F as High-Voltage Cathode Material