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Polyol process for the synthesis of LiFePO₄ rhombohedral particles

Title data

Singh, Madhav ; Willert-Porada, Monika:
Polyol process for the synthesis of LiFePO₄ rhombohedral particles.
In: Advanced Powder Technology. Vol. 22 (March 2011) Issue 2 . - pp. 284-289.
ISSN 0921-8831

Official URL: Volltext

Abstract in another language

As a new approach, LiFePO₄ nanoparticles were directly synthesized from precursors iron(III) nitrate and lithium dihydrogen phosphate by a polyol process without post heat treatment in one step. The obtained powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and combined thermogravimetry and differential scanning calorimetry and mass spectroscopy TG/DSC/MS. The X-ray diffraction showed the orthorhombic crystal structure of LiFePO₄ without any impurity phases. The synthesized LiFePO₄ has rhombohedral morphology with high aspect ratio with a thickness of less than 100 nm. TG/DSC/MS revealed a weight loss of only 10.9 wt.% when heating up to 1000 °C. Electrodes prepared from the LiFePO₄ particles were electrochemically characterized by cycling at 0.1C current rate and temperatures in half cell measurements against lithium foil between 2 and 4.2 V in an EC/DMC electrolyte with 1 M LiPF₆ as conductive salt. A reversible specific capacity of 146 mAh/g was achieved by applying carbon coating on the rhombohedral particles.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Cathode material; Polyol; LiFePO4 rhombohedrals; X-ray diffraction; Cyclic voltammetry
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Former Professors > Chair Electrochemical Process Engineering - Univ.-Prof. Dr. Monika Willert-Porada
Faculties > Faculty of Engineering Science > Former Professors
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 500 Natural sciences
600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 21 Jun 2017 10:03
Last Modified: 21 Jun 2017 10:03