CAJ | 학술논문

氧电极是固体聚合物电解质(SPE)水电解池(WE)的控制电极,其中扩散层、催化剂的性能将直接影响电解池性能的高低.采用热分解、酸浸蚀、电沉积方法,对钛氧电极扩散层基体进行表面改性研究;探讨了氧电极催化剂对WE极化性能的影响;同时考察了温度、氧电极扩散层对WE性能的影响.结果表明:电沉积法处理钛氧电极扩散层可以使电阻降低,并且在大气中搁置电阻也不会增加;IrO_2-RuO_2氧电极复合催化剂具有最佳的催化活性;随着电解温度升高,电解电压下降;以电沉积法处理的钛网为氧电极扩散层时,WE性能得到明显提高,在常压、70℃条件下,电解电压为1.65 V时.电流密度大于1 A/cm~2.
양전겁시고체취합물전해질(SPE)수전해지(WE)적공제전겁,기중확산층、최화제적성능장직접영향전해지성능적고저.채용열분해、산침식、전침적방법,대태양전겁확산층기체진행표면개성연구;탐토료양전겁최화제대WE겁화성능적영향;동시고찰료온도、양전겁확산층대WE성능적영향.결과표명:전침적법처리태양전겁확산층가이사전조강저,병차재대기중각치전조야불회증가;IrO_2-RuO_2양전겁복합최화제구유최가적최화활성;수착전해온도승고,전해전압하강;이전침적법처리적태망위양전겁확산층시,WE성능득도명현제고,재상압、70℃조건하,전해전압위1.65 V시.전류밀도대우1 A/cm~2.
Oxygen electrode is a dominant electrode of SPE water electrolyzer (WE), of which diffusion layer and catalyst have direct influence on the performance of WE. The titanium oxygen electrode diffusion layers obtained by thermal decomposition, acid immersion, electro-deposition surface modification were evaluated. The effects of oxygen electrode catalyst, temperature, and oxygen electrode diffusion layer on the performance of WE were also discussed. The results showed that the resistance of Ti oxygen electrode diffusion layer decreased after electro-deposition treatment, and did not increase even if it was exposed to the atmosphere for a long time. IrO2-RuO_2 oxygen electrode catalyst has the best catalytic characteristic. Electrolysis voltage decreased increasing temperature. The WE performance was obviously enhanced when electro-deposited Ti mesh was used as oxygen electrode diffusion layer, its current density was more than 1 A/cm~2 at atmosphere pressure,70 ℃, 1.65 V.