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Variable Thickness IPMC: Capacitance Effect on Energy Harvesting

  • Rashi Tiwari (a1), Sang-Mun Kim (a2) and Kwang Kim (a3)


Ionic Polymer Metal Composites (IPMCs) are manufactured by electroless deposition of metal on Nafion. This deposition method results in the IPMCs with thickness between 0.17mm to 0.20mm with the electrode thickness of around a few m each. It is now generally accepted that on mechanical deformation IPMC produces charge thus making these materials potentially suitable for energy harvesting applications. Due to thin metal plating and inherited flexibility of the Nafion film the IPMCs suffer in stiffness that may be required for some energy harvesting applications. Also earlier works have shown that 0.20mm thick IPMC produce better battery charging than 0.17mm thick one. Hot pressing, using metal mold, Nafion films was employed to produce thicker and comparatively stiffer IPMCs electroded with Palladium metal. Palladium was used because of shorter manufacturing time. This IPMC shows improved energy harvesting. Due to the increased thickness these IPMCs also function as better capacitors than their conventional counterparts. On application of voltage, these IPMCs show charging and discharging effects of a capacitor. This property of IPMC may be useful for storing charge.



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1. Addington, M., and Schodek, D. L., “Smart Materials and Technologies in Architecture,” Architectural Press, MA (2004).
2. Shahinpoor, M., Kim, K. J. and Mojarrad, M., “Artificial Muscles: Applications of Advanced Polymeric Nano-composites,” Taylor and Francis, New York (2007).
3. Shahinpoor, M., Bar-Cohen, Y., Simpson, J. O., and Smith, J., “Ionic Polymer Metal Composites as Biomimmetic Sensors and Actuators,” presented at SPIE 5th Annual Symposium on Smart Structures and Materials (1998).
4. Oguro, K., “Recipe-IPMC,” (2001).
5. Guan, M. J. and Liao, W.H., “Characteristics of Energy Storage Devices in Piezoelectric Energy Harvesting Systems”, J. Of Intelligent Material Systems and Structures, Vol. 9, pp. 671680 (2008).
6. Roundy, S., Wright, P. K. and Rabaey, J., “A Study of Low Level Vibrations as the Power Source for Wireless Sensor Node”, Computer Communications, Vol. 26, pp. 11311144 (2003).
7. Umeda, M., Nakamura, K. and Ueha, S., “Analysis of Transformation of Mechanical Impact Energy to Electrical Energy Using a Piezoelectric Vibrator”, Japanese Journal of Applied Physics, Vol. 35, pp. 32673273 (1996).
8. Kimaru, M., “Piezoelectric Generation Device”, US Patent# 5,801,475 (1998).
9. Sterner, T., “Human-Powered Wearable Computing”, IBM Systems Journal, Vol. 35, pp. 618 (1996).
10. Kymissis, J., Kendall, C., Paradiso, J., Gershenfeld, N., “Parasitic Power Harvesting in Shoes”, 2nd IEEE International Conference on Wearable Computing, pp. 132139 (1998).
11. Goldfarb, M. and Jones, L. D., “On the Efficiency of Electric Power Generation With Piezoelectric Ceramics”, Journal of Dynamic Systems, Measurement and Control, Vol. 121, pp. 566571 (1999).
12. Clark, W. and Ramsay, M. J., “Smart Material Transducers as Power Sources for MEMS Devices”, International Symposium on Smart Structures and Microsystems, Hong Kong (2000)
13. Sodano, H. A., Magliula, E. A., Park, G. and Inman, D. J., “Electric Power Generation Using Piezoelectric Devices”, 13th International Conference on Adaptive Structures and Technologies, Germany (2000).
14. Newbury, K. and Leo, D. J., “Electromechanical Modeling and Characterization of Ionic Polymer Benders,J. Of Intelligent Material Systems and Structures, Vol. 13, pp. 5160 (2002).
15. Tiwari, R., Kim, K. J., and Kim, S.-M., “Ionic Polymer Metal Composites as Energy Harvesters,Smart Structures and Systems, Vol. 4, No. 5, pp. 549563 (2008).


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Variable Thickness IPMC: Capacitance Effect on Energy Harvesting

  • Rashi Tiwari (a1), Sang-Mun Kim (a2) and Kwang Kim (a3)


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