The conductivity behaviour of gamma‐irradiated PEO‐LiX electrolytes. I

Wiley - Tập 20 Số 3 - Trang 275-280 - 1988
E. Kronfli1, Keith V. Lovell1, Alan Hooper2, R.J. Neat2
1Applied Physics and Electro Optics Group, R.M.C.S., Shrivenham, Swindon, Wiltshire SN6 8LA, UK
2Materials Development Division, Harwell Laboratory, Didcot, Oxfordshire OX110RA, UK

Tóm tắt

AbstractIn an attempt to enhance the room temperature ionic conductivity of PEO‐LiX films, samples have been exposed to gamma‐irradiation at 78°C. The success with which cross‐links have been introduced into the amorphous form has been evaluated from d.s.c. analysis and temperature‐dependent conductivity data. Retardation of the recrystallisation event, associated with uncomplexed poly(ethylene oxide), does not occur over a range of total doses. Changes in overall conductivity levels for the PEO‐LiCF3SO3 ([EO units]/[Li] = 9) system, indicate light cross‐linking at 2.25 Mrad of exposure. However, higher doses result in a substantial amount of chain scission, leading eventually to poor mechanical properties. A similar study on PEO‐LiClO4 ([EO units]/[Li] = 20) confirms that the above route is an ineffective method to improve room temperature conductivity.

Từ khóa


Tài liệu tham khảo

Armand M. B., 1979, Fast Ion Transport in Solids, 131

10.1016/0167-2738(83)90146-7

10.1016/0167-2738(81)90038-2

Charlesby A., 1959, Atomic Radiation and Polymers

10.1016/0167-2738(84)90022-5

UK Patent 2143 539B.

Neat R. J. Glasse M. D. Linford R. G.&Hooper A. Transport‐Structure Relations in Fast Ion and Mixed Conductors Proceedings of the 6th Risø International Symposium on Metallurgy and Material Science Eds Poulsen F. W. Hessel Andersen N. Clausen K. Skaarup S. and Sørensen O. T. 1985.

10.1007/BF00254943

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Wiley

Tập 20 Số 3

275-280

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