Synthesis of FePO4 cathode material for lithium ion batteries by a sonochemical method
- 1. Faculty of Engineering and Resource Science, Akita University, Akita 010-8502 (Japan)
- 2. Graduate School of System and Information Engineering, University of Tsukuba, Ibaraki 305-8573 (Japan)
- 3. Graduate School of Energy Science, Kyoto University, Kyoto 606-8501 (Japan)
- 4. Department of Chemistry and Chemical Engineering, Niigata University, Niigata 950-2181 (Japan)
Description
Hydrated amorphous FePO4 was synthesized by a sonochemical reaction method, in which a solution of (NH4)2HPO4 and FeSO4.7H2O was irradiated by an ultrasonic wave. From this material, two kinds of cathode materials were easily prepared: (1) an amorphous sample prepared by heating at 350 deg. C and (2) a crystalline sample prepared by heating at 700 deg. C. Both samples consisted of homogeneous sub-micron particles. The amorphous sample of FePO4 exhibited high discharge capacities with more than 100 mAh g-1 in the range of 3.9-2.0 V versus Li/Li+ at a current rate of 0.2 C. The sonochemical synthesis proposed herein has the following advantages: no use of oxidation agents for production of trivalent iron ions, reduction in reaction time, control of particle size, and enlargement in surface area for the preparation of the cathode material
Availability note (English)
Available from http://dx.doi.org/10.1016/j.materresbull.2007.05.024Additional details
Identifiers
- DOI
- 10.1016/j.materresbull.2007.05.024;
- PII
- S0025-5408(07)00223-1;
Publishing Information
- Journal Title
- Materials Research Bulletin
- Journal Volume
- 43
- Journal Issue
- 5
- Journal Page Range
- p. 1203-1208
- ISSN
- 0025-5408
- CODEN
- MRBUAC
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 40023909
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- AMMONIUM PHOSPHATES; CATHODES; ELECTRIC BATTERIES; ELECTRON MICROSCOPY; HEATING; IRON IONS; IRON PHOSPHATES; LITHIUM IONS; PARTICLE SIZE; SURFACE AREA; SYNTHESIS; TEMPERATURE RANGE 0400-1000 K; ULTRASONIC WAVES; X-RAY DIFFRACTION
- Descriptors DEC
- AMMONIUM COMPOUNDS; CHARGED PARTICLES; COHERENT SCATTERING; DIFFRACTION; ELECTROCHEMICAL CELLS; ELECTRODES; ENERGY STORAGE SYSTEMS; ENERGY SYSTEMS; IONS; IRON COMPOUNDS; MICROSCOPY; OXYGEN COMPOUNDS; PHOSPHATES; PHOSPHORUS COMPOUNDS; SCATTERING; SIZE; SOUND WAVES; SURFACE PROPERTIES; TEMPERATURE RANGE; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Copyright
- Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.