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Disordered carbon nanofibers/LiCoPO4 composites as cathode materials for lithium ion batteries

Sarapulova, Angelina and Mikhailova, Daria and Schmitt, Ljubomira Ana and Oswald, Steffen and Bramnik, Natalia and Ehrenberg, Helmut (2012):
Disordered carbon nanofibers/LiCoPO4 composites as cathode materials for lithium ion batteries.
62, In: Journal of Sol-Gel Science and Technology, (1), pp. 98-110, ISSN 0928-0707, [Online-Edition: http://dx.doi.org/10.1007/s10971-012-2691-0],
[Article]

Abstract

Single-phase LiCoPO4 nanoparticles were synthesized by solid-state reaction method and subsequent high-energy ball milling. The electrochemical properties of LiCoPO4/Li batteries were analyzed by ac impedance experiments, cyclic voltammetry (CV), and charge/discharge tests. The structural and morphological performance of LiCoPO4 nanoparticles was investigated by X-ray diffraction (XRD), scanning electron microscope (SEM), and transmission electron microscope (TEM). The XRD result demonstrated that LiCoPO4 nanoparticles had an orthorhombic olivine-type structure with a space group of Pmnb. Different conductive additives including acetylene black and carbon black (SP270) were used to fabricate electrodes. The morphologies of the electrodes and different conductive additives were observed by field emission-scanning electron microscopy (FE-SEM). LiCoPO4/Li battery with acetylene black showed the best electrochemical properties, and exhibited a discharge plateau at around 4.7 V with an initial discharge capacity of 110 mAh g−1 at a discharge current density of 0.05 mA cm−2 at 25 °C.

Item Type: Article
Erschienen: 2012
Creators: Sarapulova, Angelina and Mikhailova, Daria and Schmitt, Ljubomira Ana and Oswald, Steffen and Bramnik, Natalia and Ehrenberg, Helmut
Title: Disordered carbon nanofibers/LiCoPO4 composites as cathode materials for lithium ion batteries
Language: English
Abstract:

Single-phase LiCoPO4 nanoparticles were synthesized by solid-state reaction method and subsequent high-energy ball milling. The electrochemical properties of LiCoPO4/Li batteries were analyzed by ac impedance experiments, cyclic voltammetry (CV), and charge/discharge tests. The structural and morphological performance of LiCoPO4 nanoparticles was investigated by X-ray diffraction (XRD), scanning electron microscope (SEM), and transmission electron microscope (TEM). The XRD result demonstrated that LiCoPO4 nanoparticles had an orthorhombic olivine-type structure with a space group of Pmnb. Different conductive additives including acetylene black and carbon black (SP270) were used to fabricate electrodes. The morphologies of the electrodes and different conductive additives were observed by field emission-scanning electron microscopy (FE-SEM). LiCoPO4/Li battery with acetylene black showed the best electrochemical properties, and exhibited a discharge plateau at around 4.7 V with an initial discharge capacity of 110 mAh g−1 at a discharge current density of 0.05 mA cm−2 at 25 °C.

Journal or Publication Title: Journal of Sol-Gel Science and Technology
Volume: 62
Number: 1
Uncontrolled Keywords: Rechargeable batteries - Intercalation - Lithium - Olivine-type structure - Cathode
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Structure Research
Date Deposited: 31 Aug 2012 13:24
Official URL: http://dx.doi.org/10.1007/s10971-012-2691-0
Identification Number: doi:10.1007/s10971-012-2691-0
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