The Effect of Particle Size on the Processes of Charging and Discharging of the LiFe0.97Ni0.03PO4/C/Ag Cathode Material
- Autores: Gryzlov D.Y.1, Novikova S.A.2, Kulova T.L.1, Skundin A.M.1, Yaroslavtsev A.B.2
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Afiliações:
- Frumkin Institute of Physical Chemistry and Electrochemistry
- Kurnakov Institute of General and Inorganic Chemistry
- Edição: Volume 54, Nº 5 (2018)
- Páginas: 442-450
- Seção: Article
- URL: https://journals.rcsi.science/1023-1935/article/view/189347
- DOI: https://doi.org/10.1134/S1023193518050038
- ID: 189347
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Resumo
Olivine-structured LiFe0.97Ni0.03PO4/C/Ag nanomaterials of varying dispersibility are prepared by using sol–gel synthesis with subsequent milling. The materials are certified using X-ray diffraction analysis, scanning electron microscopy, low-temperature nitrogen adsorption, and electrochemical testing under the lithium-ion battery operating conditions. The LiFe0.97Ni0.03PO4/C/Ag cathode material primary particles’ size was shown to decrease, under the intensifying of ball-milling, from 42 to 31 nm, while the material’s specific surface area increased from 48 to 65 m2/g. The discharge capacity, under slow charging–discharging (C/8), approached a theoretical one for all materials under study. It was found that under fast charging–discharging (6 C and 30 C) the discharge capacity is inversely proportional to the particles’ mean size. The discharge capacity under the 6 С current came to 75, 94, 97, and 106 mA h/g for the initial material and that milled at a rotation velocity of 300, 500, and 700 rpm, respectively. An increase in the lithium diffusion coefficient upon the samples’ intense milling is noted.
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Sobre autores
D. Gryzlov
Frumkin Institute of Physical Chemistry and Electrochemistry
Email: askundin@mail.ru
Rússia, Leninskii pr. 31, Moscow, 119071
S. Novikova
Kurnakov Institute of General and Inorganic Chemistry
Email: askundin@mail.ru
Rússia, Leninskii pr. 31, Moscow, 119991
T. Kulova
Frumkin Institute of Physical Chemistry and Electrochemistry
Email: askundin@mail.ru
Rússia, Leninskii pr. 31, Moscow, 119071
A. Skundin
Frumkin Institute of Physical Chemistry and Electrochemistry
Autor responsável pela correspondência
Email: askundin@mail.ru
Rússia, Leninskii pr. 31, Moscow, 119071
A. Yaroslavtsev
Kurnakov Institute of General and Inorganic Chemistry
Email: askundin@mail.ru
Rússia, Leninskii pr. 31, Moscow, 119991
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