書法墨汁塗層電極於柔性紙基超級電容器之應用

Abstract

本研究使用書法墨汁塗層於色譜紙上，成功製作出了一款新型態可撓性電極，並且用於儲能元件上。首先將色譜紙浸泡於書法墨汁中，浸泡完後烤乾，即完成書法墨汁塗層電極。隨後網印上還原氧化石墨稀-聚苯胺-殼聚醣前驅漿料，最後塗佈電解液並組裝成對稱型超級電容器。 書法墨汁塗層電極具有可撓性、成本低、製做工藝簡單、製做環境不受限制等優點。對於書法墨汁塗層電極的基本性質、組成元素及結構，使用場發射鎗掃描式電子顯微鏡（SEM）、探針式表面輪廓儀、水接觸角測量儀、四點探針面電阻測量儀、X射線衍射儀（XRD）、X射線光電子能譜儀（XPS）進行分析。顯微鏡下可發現經書法墨汁塗佈後，色譜紙表面形成一均勻的導電塗層。該塗層具有良好的導電性，且於1000次的循環彎曲測試中，表現出優異的導電保持率。書法墨汁塗層電極具有良好的親水性，有利於後續複合材料的塗佈。在應用於撓性超級電容器時，以定電流充放電(GCD)，電流0.5 mA的條件量測時，其面積電容值高達179.08 mF/cm2，庫倫效率達80.66%。

In this study, a new type of flexible electrode was successfully fabricated by coating on chromatography paper with calligraphic black ink; the black ink-coated paper was then used as the electrodes of a flexible supercapacitor. First, chromatography paper is soaked in calligraphy black ink and then dried to fabricate black ink-coated paper. Following which the black ink-coated paper was screen-printed with reduced graphene oxide-polyaniline-chitosan slurry. Finally, the gel-electrolyte was coated on the electrodes and assembled into a symmetrical supercapacitor. Calligraphy black ink-coated paper has the advantages of flexibility, low cost, simple manufacturing process, and unrestricted manufacturing environment. calligraphy black ink-coated paper was characterized by the field emission scanning electron microscope , probe-type surface analyzer, water contact angle goniometer, 4-point probe sheet resistivity measurement device, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Calligraphy black ink forms a uniform coating on the surface of calligraphy black ink-coated paper. The coating has good conductivity and exhibits excellent conductivity retention in 1000 cycles of bending tests. Calligraphy black ink-coated paper has good hydrophilicity, which is beneficial to the subsequent coating of composite materials. In constant current charge-discharge(GCD), current of 0.5 mA, the supercapacitor with calligraphy black ink-coated paper exhibited an areal specific capacitance of up to 179.08 mF/cm² and coulomb efficiency of 80%.