金属Ni修饰褐煤半焦的制备及其在DSSCs中的应用  

Preparation of metal Ni modified lignite semi-coke and its application in DSSCs

作　　者：魏立国 毛伟 王东 余福蓉 何晖毅 邹明月 Wei Liguo;Mao Wei;Wang Dong;Yu Furong;He Huiyi;Zou Mingyue(School of Environmental & Chemical Engineering, Heilongjiang University of Science & Technology, Harbin 150022, China)

机构地区：[1]黑龙江科技大学环境与化工学院,哈尔滨150022

出　　处：《黑龙江科技大学学报》2021年第5期653-659,共7页Journal of Heilongjiang University of Science And Technology

基　　金：国家自然科学基金面上项目(51974113);黑龙江省博士后科研启动基金项目(LBH-Q19177)。

摘　　要：为制备工艺简单、价格低廉的对电极材料,拓展低阶煤应用领域,以金属Ni修饰的褐煤半焦为研究对象,对其进行了SEM、XRD、XPS、Raman光谱等表征,利用循环伏安、电化学交流阻抗、塔菲尔极化曲线等测试方法,研究了酸处理、金属Ni修饰及半焦形成对对电极性能的影响。结果表明:金属Ni修饰的褐煤半焦能够提高材料的电催化活性及导电性,有助于催化电解液还原,进而提高电池的光电转换效率;金属Ni修饰的褐煤半焦对电极的光电转化效率为2.074%,明显高于褐煤对电极的效率。金属Ni修饰褐煤半焦可提高煤基对电极材料的光伏性能。This paper aims to prepare coal-based electrode materials with simple technology and low price,and promote their practical application in dye-sensitized solar cell.The study involves taking as research object the metal Ni-modified lignite semi coke which is characterized by SEM,XRD,XPS and Raman Spectra;and investigating the influence of acid treatment,Ni modification,and semicoke formation on the electrocatalytic performance using CV,EIS and Tafel curves.The results show that Ni modified lignite semi-coke enables an improvement in the electrocatalytic activity and conductivity of the material,contributing to the reduction of the catalytic electrolyte and thus improving the photoelectric conversion efficiency of the solar cells;the photoelectric conversion efficiency of Ni modified lignite semi-coke counter electrode is 2.074%,which is much higher than that of lignite counter electrode.Nickel modified lignite semi-coke could enable the improved performance of coal-based electrodes in dye sensitized solar cells.

关 键 词：褐煤 半焦 对电极 染料敏化太阳能电池 光电性能 

分 类 号：TQ536[化学工程—煤化学工程]