Pseudocapacitive contributions to electrochemical kinetics in NiOx electrochromic anodes

Because of its ability to change optical absorption dynamically by applied electric field, nickel oxide (NiO) is a promising anodic material in smart windows, which can improve energy conversion efficiency in construction buildings. Although many works have achieved high electrochromic performance with different method. The underlying mechanism is still not fully investigated. In this article, we prepared the NiO films with large specific surface area and high stability by electron beam evaporation. X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) were employed to figure out the surface morphology and composition of as-deposited films. Afterwards, the electrochemical properties and optical performance of the prepared NiO films were investigated. On this basis, the origin of surface charge was fully analyzed by cyclic voltammetry and diffusion coefficient test. These experimental and theoretical results firmly confirm that both the surface reaction and capacitive effect bring about the excellent EC performance in NiO films. These results not only provide clear evidence about electrochemical kinetics in NiO films, but also offer some useful guidelines for the design of EC materials with higher performance and longer stability.     

电化学法制取动物毛中系列氨基酸新工艺

以动物毛为原料，应用电化学法，不引进化学试剂，电流密度为３～５Ａ／ｍ２，氨基酸浓度为５０％，提取温度为６０～７０℃的条件下进行分离与纯化，可获得胱氨酸、酪氨酸、亮氨酸、脯氨酸、赖氨酸、精氨酸、组氨酸、谷氨酸和天门冬氨酸等九种单质系列氨基酸，其纯度为９８．５％以上。