演講快訊
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- 演講快訊
10.11
High power, high energy density solid-state polymer electrolyte batteries
Prof. Thein Kyu
摘要 :
The present talk entails recent development of high power, high energy density solid-state polymer electrolyte batteries exhibiting both supercapacitor and battery behaviors in a full battery configuration in the symmetric carbonaceous electrode assembly capable of operating within the potential range of 0.01 ~ 3.5 V. Various effects of (1) PEM thickness, (2) relative amounts of activated carbon and conductive carbon black (Super P) in the symmetric carbonaceous electrode configurations and (3) the operating voltage ranges of 1.5 to 3 V on the improvement of specific energy densities, power densities are demonstrated. The present supercapacitive polymer electrolyte membrane (SCPEM) is capable of storing extra energy (e.g., specific capacity of over 200 ~ 400 Wh/kg) and simultaneously achieves high specific power densities of over 8,000 ~ 10,000 W/kg which are significantly higher relative to those of conventional solid-state batteries (specific capacity 100 ~ 120 Wh/kg and specific power of about 80 ~ 100 W/kg). The specific capacitance is about 75 F/g with capacity retention over 90 at 1 mA/cm2 for 10,000 cycles with Coulombic efficiency close to100% thus tested. Of particular interest is that the present finding opens new opportunity for energy harvesting by simply flexing these supercapacitive polymer electrolyte membranes in the aforementioned supercapacitive battery configurations to facilitate simultaneous energy harvesting and energy storage.
學經歷 :
Kyu received D. Eng. in Polymer Chemistry, Faculty of Engineering, Kyoto University in 1980. Prior to joining the Department of Polymer Engineering at the University of Akron in 1983, he was a post-doctoral research fellow at Department of Chemistry, McGill University, Montreal, Canada and a research associate at Polymer Research Institute, University of Massachusetts, Amherst, USA. Recently, he retired from his Distinguished Professorship position at the School of Polymer Science and Polymer Engineering. He will remain active in research and development. His research interest encompasses phase equilibria and kinetics of phase separation in polymer blends; phase transitions in crystalline and liquid crystalline polymers; molecular composites; ion-exchange membranes; solid lithium ion polymer electrolyte battery, supercapacitor, pattern formation dynamics and electro-optical properties of dispersed liquid crystal and photonic crystals, and nonlinear dynamics of crystal motion. His research effort has culminated in some 260 refereed papers, 10 patents, and 4 books.