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Phase evolution in ...
Phase evolution in calcium molybdate nanoparticles as a function of synthesis temperature and its electrochemical effect on energy storage
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- Minakshi, M. (författare)
- Murdoch Univ, Engn & Informat Technol, Murdoch, WA 6150, Australia;Helmholtz Inst Ulm Electrochem Energy Storage HIU, D-89081 Ulm, Germany
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- Mitchell, D. R. G. (författare)
- Univ Wollongong, Australian Inst Innovat Mat, Electron Microscopy Ctr, Innovat Campus, North Wollongong, NSW 2500, Australia
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- Baur, C. (författare)
- Helmholtz Inst Ulm Electrochem Energy Storage HIU, D-89081 Ulm, Germany
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- Chable, J. (författare)
- Helmholtz Inst Ulm Electrochem Energy Storage HIU, D-89081 Ulm, Germany
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- Barlow, A. J. (författare)
- La Trobe Univ, Ctr Mat & Surface Sci, Bundoora, Vic 3086, Australia
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- Fichtner, M. (författare)
- Helmholtz Inst Ulm Electrochem Energy Storage HIU, D-89081 Ulm, Germany
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- Banerjee, Amitava (författare)
- Uppsala universitet,Materialteori
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- Chakraborty, Sudip (författare)
- Uppsala universitet,Materialteori
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- Ahuja, Rajeev, 1965- (författare)
- Uppsala universitet,KTH,Egenskaper,Tillämpad materialfysik,Condensed Matter Theory Group, Materials Theory Division, Department of Physics and Astronomy, Uppsala University, Sweden,Materialteori,Royal Inst Technol KTH, Dept Mat & Engn, Appl Mat Phys, S-10044 Stockholm, Sweden
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(creator_code:org_t)
- 2019
- 2019
- Engelska.
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Ingår i: Nanoscale Advances. - : Royal Society of Chemistry. - 2516-0230. ; 1:2, s. 565-580
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Abstract
Ämnesord
Stäng
- The design of a suitable electrode is an essential and fundamental research challenge in the field of electrochemical energy storage because the electronic structures and morphologies determine the surface redox reactions. Calcium molybdate (CaMoO4) was synthesized by a combustion route at 300 °C and 500 °C. We describe new findings on the behaviour of CaMoO4 and evaluate the influence of crystallinity on energy storage performance. A wide range of characterization techniques was used to obtain detailed information about the physical and morphological characteristics of CaMoO4. The characterization results enable the phase evolution as a function of the electrode synthesis temperature to be understood. The crystallinity of the materials was found to increase with increasing temperature but with no second phases observed. Molecular dynamics simulation of electronic structures correlated well with the experimental findings. These results show that to enable faster energy storage and release for a given surface area, amorphous CaMoO4 is required, while larger energy storage can be obtained by using crystalline CaMoO4. CaMoO4 has been evaluated as a cathode material in classical lithium-ion batteries recently. However, determining the surface properties in a sodium-ion system experimentally, combined with computational modelling to understand the results has not been reported. The superior electrochemical properties of crystalline CaMoO4 are attributed to its morphology providing enhanced Na+ ion diffusivity and electron transport. However, the presence of carbon in amorphous CaMoO4 resulted in excellent rate capability, suitable for supercapacitor applications.
Ämnesord
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Nyckelord
- Calcium
- Cathodes
- Crystallinity
- Electrochemical electrodes
- Electron transport properties
- Electronic structure
- Energy storage
- Lithium-ion batteries
- Metal ions
- Molecular dynamics
- Molybdenum compounds
- Morphology
- Nanocrystalline materials
- Reaction kinetics
- Redox reactions
- Sodium compounds
- Storage (materials)
- Surface reactions
- Synthesis (chemical)
- Characterization techniques
- Computational modelling
- Electrochemical effects
- Electrochemical energy storage
- Increasing temperatures
- Molecular dynamics simulations
- Morphological characteristic
- Supercapacitor application
- Calcium compounds
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- Av författaren/redakt...
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Minakshi, M.
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Mitchell, D. R. ...
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Baur, C.
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Chable, J.
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Barlow, A. J.
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Fichtner, M.
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visa fler...
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Banerjee, Amitav ...
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Chakraborty, Sud ...
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Ahuja, Rajeev, 1 ...
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- NATURVETENSKAP
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NATURVETENSKAP
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Nanoscale Advanc ...
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Kungliga Tekniska Högskolan
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Uppsala universitet