1. Towards innovative electrode materials obtained by high-pressure: Experimental and computational study of HP-FePO4
- Author
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Arroyo-de Dompablo, M.E., Gallardo-Amores, J.M., Azcondo, M.T., García-Alvarado, F., and Amador, U.
- Subjects
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ELECTRODES , *HIGH pressure (Science) , *LITHIUM cells , *POLARIZATION (Nuclear physics) - Abstract
Abstract: In the search for new electrodes for lithium batteries processing under high pressure opens new paths to innovative materials. The High Pressure (HP) polymorph of α-FePO4 crystallizes in the CrVO4 structural-type; first principles calculations predict that Li insertion would occur at 3.36V. Accordingly, crystalline samples of HP-FePO4 display electrochemical activity with a lithium insertion process occurring at 3V, which has not been observed in the α-FePO4 polymorph. This reduction process is characterized by a large cell polarization that suggests a very slow kinetics. The poor electrochemical performance of highly crystalline HP-FePO4 is favored in iron phosphate samples obtained under mild conditions of pressure and temperature, that produce a partially amorphous material and prevent an excessive particle growth. [Copyright &y& Elsevier]
- Published
- 2006
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