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Thermally Stabilized Polyaniline With m-Xylylenedisulfonic Acid And Its Application For A Counter Electrode Of A Tantalum Capacitor

Published online by Cambridge University Press:  10 February 2011

H. Ishikawa ,
H. Yageta ,
K. Amano ,
M. Satoh  and
E. Hasegawa
H. Ishikawa
Affiliation:
Functional Organic Material Research Laboratory, NEC Corporation, Miyazaki 4, Miyamae, Kawasaki 216 JAPAN
H. Yageta
Affiliation:
Functional Organic Material Research Laboratory, NEC Corporation, Miyazaki 4, Miyamae, Kawasaki 216 JAPAN
K. Amano
Affiliation:
Functional Organic Material Research Laboratory, NEC Corporation, Miyazaki 4, Miyamae, Kawasaki 216 JAPAN
M. Satoh
Affiliation:
Functional Organic Material Research Laboratory, NEC Corporation, Miyazaki 4, Miyamae, Kawasaki 216 JAPAN
E. Hasegawa
Affiliation:
Functional Organic Material Research Laboratory, NEC Corporation, Miyazaki 4, Miyamae, Kawasaki 216 JAPAN
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Abstract

We have succeeded in preparing a conductive polyaniline (PAn) with improved thermal stability from a chemical oxidative polymerization of aniline by using an oxidant and a novel protonic acid, m-xylylenedisulfonic acid (XDSA). The acid was synthesized from dibromoxylene and characterized by elemental analysis, IR and NMR spectroscopies. The polymer which is doped with XDSA shows a high conductivity of 5 S/cm. The conductivity does not change with annealing at 125°C in air for over 1000 hours. This polymer exhibits good thermal stability, and this stability is attributed to XDSA dopant, which consists of a bi-functional sulfonic group bonded to a polymer chain. By immersing an anodized tantalum pellet into a reactive solution, PAn doped with XDSA film is formed on the dielectric surface. The tantalum capacitor using PAn doped with XDSA as a counter electrode shows the improved characteristics: high apparent capacitance (90%), and small series resistance (<200mΩ at 100kHz). The capacitor demonstrates an excellent thermal stability due to because of the exceptional heat-resistance of PAn doped with XDSA formed in the capacitor.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 413: Symposium W – Electrical, Optical, and Magnetic Properties of Organic Solid State Materials III , 1995 , 559
Copyright
Copyright © Materials Research Society 1996

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References

REFERENCES

1. Kobayashi, A., Xu, X, Ishikawa, H., Satoh, M. and Hasegawa, E., J. Appl. Phys. 72, 5702 (1992).Google Scholar
2. Amano, K., Ishikawa, H., Kobayashi, A., Satoh, M. and Hasegawa, E., Synth. Met. 62, 229 (1994).Google Scholar
3. Satoh, M., Ishikawa, H., Amano, K., Hasegawa, E., Yoshino, K., Synth. Met. 71, 2259 (1995).Google Scholar
4. Wang, Z. H., Javadi, H. H. S., Ray, A., MacDiarmid, A G. and Epstein, A. J., Phys. Rev. B 42,5411 (1990).Google Scholar