Supercritical synthesis in combination with a spray process for 3D porous microsphere lithium iron phosphate
Artikel i vetenskaplig tidskrift, 2014

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.

LIFEPO4 NANOPARTICLES

HYDROTHERMAL

SYNTHESIS

CATHODE

MICRO

FACILE

HIGH-RATE PERFORMANCE

ELECTRODE MATERIALS

ION BATTERIES

WATER

ELECTROCHEMICAL PROPERTIES

Författare

Jae-Kwang Kim

Chalmers, Teknisk fysik, Kondenserade materiens fysik

CrystEngComm

1466-8033 (ISSN)

Vol. 16 13 2818-2822

Ämneskategorier

Oorganisk kemi

DOI

10.1039/c3ce42264j

Mer information

Skapat

2017-10-07