Hostname: page-component-78c5997874-xbtfd Total loading time: 0 Render date: 2024-11-07T23:10:54.434Z Has data issue: false hasContentIssue false
  • English
  • Français

New Iron (III) Hydroxyl-Phosphate with Rod-packing Structure as Intercalation Materials

Published online by Cambridge University Press:  11 February 2011

Yanning Song ,
Peter Y. Zavalij  and
M. Stanley Whittingham
Yanning Song
Affiliation:
Department of Chemistry and Institute for Materials Research, State University of New York at Binghamton, Binghamton, NY 13902–6016
Peter Y. Zavalij
Affiliation:
Department of Chemistry and Institute for Materials Research, State University of New York at Binghamton, Binghamton, NY 13902–6016
M. Stanley Whittingham
Affiliation:
Department of Chemistry and Institute for Materials Research, State University of New York at Binghamton, Binghamton, NY 13902–6016
Get access

Abstract

A new iron hydroxyl-phosphate, H2Fe14/3(PO4)4(OH)4 has been synthesized under hydrothermal conditions. In this compound, perpendicular chains formed by the face-sharing FeO6 form rod-packing structure. Only about 60% of the chain sites are occupied by iron atoms; other metals, such as manganese, nickel, zinc, can be incorporated into the chain either by filling in the vacancies and/or replacing some of the iron atoms. Reversible insertion and extraction of lithium into this compound shows it to be an excellent cathode material. At current density of 0.1 mA/cm2, 90 % of the theoretical capacity (176 mAh/g) can be obtained. The utilization was reduced to about 70 % on a ten-fold increase of current density. The electrochemical behavior is attributed to the 3-dimensional rod packing structure, where lithium can move freely even at high current densities inside the 3-dimensional framework without altering the host structure. Two of the protons in the lattice may be exchanged by lithium giving Li2Fe14/3(PO4)4(OH)4. These lithium atoms are not removable in electrochemical cycling and similar electrochemical property was found for these two compounds, suggesting an ion-exchange process for the lithiation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 756: Symposia EE/FF – Solid-State Ionics – Materials for Fuel Cells and Fuel Processors , 2002 , EE7.7
Copyright
Copyright © Materials Research Society 2003

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Nanjundaswamy, K. S., Padhi, A. K., Goodenough, J. B., Okada, S., Ohtsuka, H., Arai, H. and Yamaki, J., Solid State Ionics 92, 1(1996).Google Scholar
2. Masquelier, C., Padhi, A. K., Nanjundaswamy, K. S. and Goodenough, J. B., J. of Solid State Chem. 135, 228 (1998).Google Scholar
3. Padhi, A. K., Nanjundaswamy, K. S. and Goodenough, J. B., J. Electrochem. Soc. 144, 1188 (1997).Google Scholar
4. Padhi, A. K., Nanjundaswamy, K. S., Masquelier, C., Okada, S. and Goodenough, J. B., J. Electrochem. Soc. 144, 1609 (1997).Google Scholar
5. Andersson, A. S., Kalska, B., Haggstrom, L. and Thomas, J. O., Solid State Ionics 130, 41 (2000).Google Scholar
6. Song, Y., Yang, S., Zavalij, P. Y. and Whittingham, M. S., Mater. Res. Bull. 37, 1249 (2002).Google Scholar
7. Song, Y., Zavalij, P. Y., Suzuki, M. and Whittingham, M. S., Inorg. Chem. 41, 5778 (2002).Google Scholar
8. Cavellec, M., Ferey, G., Greneche, J. M., J. Magnetism and Magnetic Mater. 167, 57 (1997).Google Scholar
9. Song, Y., Chernova, N. A., Zavalij, P. Y. and Whittingham, M. S., Chem. Mater. (submitted).Google Scholar
10. Song, Y., Zavalij, P. Y. and Whittingham, M. S., Electrochem. Comm. (submitted).Google Scholar