Double-layer capacitors fabrication

For the first time, a totally solid-state electric double layer capacitor (EDLC) was fabricated using PEO-KOH-H2O as the SPE and the polymer electrolyte could replace large amount of liquid KOH electrolyte [17,18]. The ideal rectangular shape of cyclic voltammety result for this solid-state EDLC was obtained, and the real value of specific capacitance was 90 F g". It was only slightly lower than that of liquid electrolyte supercapacitor, and it might be related to the electrode material and structure. 

At the same time, anions are repelled to semiconductor side and another interface of electrolyte/semiconductor with high electric capacity is achieved. The double-layer capacitor induces the charge carrier in the semiconductor. The switch rate is lower than TFT because the accumulation of carriers in the semiconductor layer comes from the migration of ions in electrolyte, which is not instantaneous. Moreover, the electrolyte is in sol—gel form whose aging is still a problem in the case of no encapsulation. However, the easy processing condition is a huge advantage for fabrication of fibrous transistors. 

Double-layer capacitors which utilize either Cu+ or Ag7 ion conductor have been fabricated and used as rechargeable power sources. The double-layer capacitors have a positive... 

Lee PC, Han TH, Hwang T, Oh JS, Kim SJ, Kim BW, Lee Y, Chd HR, Jeoung SK, Yoo SE, Nam JD (2012) Electrochemical double layer capacitor performance of electrospun polymer fiber-electrolyte membrane fabricated by solvent-assisted and thermally induced compression molding processes. J Membr Sci 409 365-370. doi 10.1016/j.memsci.2012.04.007... 

A supercapacitor can be fabricated to have a double layer material in one electrode while the other electrode is made of pseudocapacitor material. This configuration is known as a hybrid capacitor. The strategy is used to... 

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