摘要
石墨毡有比表面积大、导电性强、廉价易得等优点,被认为是极具应用前景的三维电极材料。为使电极与集流体良好接触,采用高导电碳黑做导电填料、聚偏氟乙烯做粘接剂制备了导电胶,实现了对石墨毡电极与柔性石墨纸集流体的简单可靠粘接。探究了导电胶配比、涂胶量和固化压力条件对石墨毡-集流体粘接试样导电性能和粘结强度的影响。粘接试样的接触电阻相较于靠压紧的无胶试样降低了50%,拉伸剪切强度达到与石墨毡自身强度接近的25.3×10^(-3) MPa。将胶粘石墨毡电极用于印刷电路板酸性氯化铜蚀刻液的电解再生和铜回收,单槽电压降低了0.08 V。这使得以金属铜计的电解再生和铜回收的比能耗降低了80 kW·h·t^(-1)。
Graphite felt is a good material for making three dimensional electrodes because of its large specific surface area, high conductivity, low cost and easy availability. To make sure good contact between the electrode and the current collector, a facile and reliable adhesion between a graphite felt electrode and a current collector of flexible graphite paper was realized by using an in-house made conductive adhesive made up of highly conductive carbon black as the filler and polyvinylidene fluoride as the binder. The influences of the adhesive composition, the amount of the adhesive used and the curing pressure on the contact resistance and adhesion strength between the graphite felt and the flexible graphite paper were investigated. In contrast to the case without using adhesive, the interface adhered under suitable condi- tions shows a marked drop of contact resistance by 50% in a wet environment. Meanwhile the tensile shear strength of the adhered samples reaches 25.3 × 10 -3 MPa, which is at the same magnitude as the strength of the felt. When applied to the electrolytic regeneration of acidic copper chloride etchant in printed circuit board production, the adhering method results in a drop of single cell voltage by 0.08 V.This would translate into a reduction of power consumption by 80 kW·h for 1 ton of metal copper recovered.
作者
刘梦真
常艳
张文
王宇新
Liu Mengzhen;Chang Yan;Zhang Wen;Wang Yuxin(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China;State Key Laboratory of Chemical Engineering,Tianjin 300350,China;China Co-Innovation Center of Chemical Science ＆ Engineering,Tianjin 300072,China;Tianjin Key Laboratory of Membrane Science ＆ Desalination Technology,Tianjin 300350,China)
出处
《化学工业与工程》
CAS
CSCD
2018年第6期41-47,共7页
Chemical Industry and Engineering
基金
天津市科技支撑计划项目"印刷电路板酸性蚀刻液现场再生和铜回收技术"(15ZCZDSF00040)
关键词
三维复合电极
导电胶
接触电阻
槽电压
3D composite electrode
conductive adhesive
contact resistance
cell voltage
