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Supercritical synthesis in combination with a spray process for 3D porous microsphere lithium iron phosphate

Jae-Kwang Kim (Institutionen för teknisk fysik, Kondenserade materiens fysik)
Crystengcomm (1466-8033). Vol. 16 (2014), 13, p. 2818-2822.
[Artikel, refereegranskad vetenskaplig]

A short synthesis time and high tap density are key conditions for the commercialization of electrode materials. Carbon coated three-dimensional porous LiFePO4 microspheres are synthesized by a supercritical and spray-dry combination method in a significantly short processing time (about 10 min). The three-dimensional (3D) porous morphology is composed of nanocrystallites tightly compacted to form three-dimensional electronic and ionic channels, which enhances their electrochemical properties. The obtained porous LiFePO4 microspheres are intensively analyzed by XRD, SEM, TGA, and FT-IR techniques. The porous microspheres, which are 60 mu m in size, show uniform morphology with the carbon coating. Moreover, at a 0.1 C rate the 3D porous microspheres of LiFePO4 exhibit a high initial capacity with a high tap density (1.7 g cm(-3)) and high active material content (similar to 90% without carbon), which corresponds to 94% and 79% of the theoretical capacity at 0.1 and 1 C.

Nyckelord: HIGH-RATE PERFORMANCE, ELECTROCHEMICAL PROPERTIES, HYDROTHERMAL, SYNTHESIS, LIFEPO4 NANOPARTICLES, ELECTRODE MATERIALS, ION BATTERIES, CATHODE, FACILE, MICRO, WATER



Denna post skapades 2014-04-17. Senast ändrad 2015-01-16.
CPL Pubid: 196870

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Kondenserade materiens fysik (1900-2015)

Ämnesområden

Elektrokemi

Chalmers infrastruktur