Electrochemical calcium extraction from 1D-Ca3Co2O6

Tchitchekova, Deyana S.; Frontera, C.; Ponrouch, Alexandre; Krich, Christopher; Bardé, Fanny

doi:10.1039/c8dt01754a

Cited by 31 publications

(52 citation statements)

References 34 publications

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“…Specific battery technologies are depicted with symbols, while the hypothetical CaBs are represented by the straight lines with energy densities as a function of the operating voltage and the specific capacity of the cathodes—the capacities are specified on each line. Two specific CaBs have also been considered in more detail: using TiS 2 and Ca 3 Co 2 O 6 as cathode materials, both were shown to be electrochemically active at 100°C (Tchitchekova et al, 2018a,b), although full reversibility and cyclability remain to be demonstrated. The hypothetical Ca-ion technology enlists Ca 3 Co 2 O 6 as the cathode and a graphite anode.…”

Section: Resultsmentioning

confidence: 99%

Multivalent Batteries—Prospects for High Energy Density: Ca Batteries

et al. 2019

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Batteries based on Ca hold the promise to leapfrog ahead regarding increases in energy densities and are especially attractive as Ca is the 5th most abundant element in the Earth's crust. The viability of Ca metal anodes has recently been shown by approaches that either use wide potential window electrolytes at moderately elevated temperatures or THF-based electrolytes at room temperature. This paper provides realistic estimates of the practical energy densities for Ca-based rechargeable batteries at the cell level, calculated using open source models for several concepts. The results from the Ca metal anode batteries indicate that doubled or even tripled energy density as compared to the state-of-the-art Li-ion batteries is viable if a practical proof-of-concept can be achieved.

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Section: Resultsmentioning

confidence: 99%

Multivalent Batteries—Prospects for High Energy Density: Ca Batteries

et al. 2019

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“…Chemical composition, volume and concentration of the electrolyte also have a major influence on reliable application of the RE. Furthermore, emerging battery chemistries, such as Li-S [174], Na-ion [129,[175][176][177], Mg-ion [177,178], Ca-ion [177,179], and Na-O 2 [180], have also considered the use of REs for enhanced electrochemical characterization.…”

Section: Discussionmentioning

confidence: 99%

Critical Review of the Use of Reference Electrodes in Li-Ion Batteries: A Diagnostic Perspective

2019

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Use of a reference electrode (RE) in Li-ion batteries (LIBs) aims to enable quantitative evaluation of various electrochemical aspects of operation such as: (i) the distinct contribution of each cell component to the overall battery performance, (ii) correct interpretation of current and voltage data with respect to the components, and (iii) the study of reaction mechanisms of individual electrodes. However, care needs to be taken to ensure the presence of the RE does not perturb the normal operation of the cell. Furthermore, if not properly controlled, geometrical and chemical features of the RE can have a significant influence on the measured response. Here, we present a comprehensive review of the range of RE types and configurations reported in the literature, with a focus on critical aspects such as electrochemical methods of analysis, cell geometry, and chemical composition of the RE and influence of the electrolyte. Some of the more controversial issues reported in the literature are highlighted and the benefits and drawbacks of the use of REs as an in situ diagnostic tool in LIBs are discussed.

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“…Parallel experimental and computational investigations establish a link between the lack of reversible electrochemical activity (experimentally observed) and hampered Ca diffusion (computationally estimated). [15][16][17][18][19][20] In this regard, the poor diffusion of Ca 2+ in inorganic structures is the major challenge for cathode discovery. 21 Compared to Li + diffusion, the hindrance to Ca mobility resides in the larger size of Ca 2+ ions on one hand and its divalent charge on the other that increases the electrostatic repulsion/attraction with the neighbouring cations/ anions in the structure.…”

Section: Introductionmentioning

confidence: 99%