Novel polybenzimidazole/graphitic carbon nitride nanosheets composite membrane for the application of acid-alkaline amphoteric water electrolysis  

作　　者：Bo Lv Hang Yin Zhigang Shao Zoujie Luan Ziyi Huang Shucheng Sun Yue Teng Chunhui Miu Qiang Gao 

机构地区：[1]Fuel Cell System and Engineering Laboratory,Key Laboratory of Fuel Cells&Hybrid Power Sources,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,Liaoning,China [2]State Key Laboratory of Molecular Reaction Dynamics,Dalian Institute of Chemical Physics,Chinese Academy of Science,Dalian 116023,Liaoning,China [3]University of Chinese Academy of Sciences.Beijing 100049,China [4]State Grid Anhui Electric Power Research Institute,Hefei 230061,Anhui,China [5]Taizhou Power Supply Company of State Grid Zhejiang Electric Power Co.,Ltd,Taizhou 318000,Zhejiang,China

出　　处：《Journal of Energy Chemistry》2022年第1期607-614,I0016,共9页能源化学（英文版）

基　　金：supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA21090101);the State Grid Corporation of China(Science and technology project of State Grid Corporation of China,No.SGLNDK00KJJS1900037,No.SGAHDK00YJJS1900079).

摘　　要：It is a great challenge to develop membrane materials with high performance and long durability for acidalkaline amphoteric water electrolysis.Hence,the graphitic carbon nitride(g-C_(3)N_(4))nanosheets were compounded with the(2,2'-m-phenylene)-5,5'-benzimidazole(m-PBI)matrix for the preparation of m-PBI/g-C_(3)N_(4) composite membranes.The synthesis of g-C_(3)N_(4) nanosheets and m-PBI matrix have been confirmed by X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscoy(TEM)and ^(1)H nuclear magnetic resonance spectra(^(1)H NMR),respectively.The fourier transform infrared spectroscopy(FT-IR)and SEM of the composite membranes showed the g-C_(3)N_(4) nanosheets were well dispersed in the m-PBI/g-C_(3)N_(4) composite membrane.The mechanical properties test exhibited the good mechanical strength,and the TGA curves of m-PBI showed the high thermal stability of composite membranes.Besides,the m-PBI/g-C_(3)N_(4) composite membrane showed excellent proton and hydroxide ion conductivity,which was higher than pure m-PBI and Nafion 115 membrane.The acid-alkaline amphoteric water electrolysis test showed m-PBI/1%g-C_(3)N_(4) composite membrane has the best performance with a current density of 800 mA cm^(-2) at cell voltage of 1.98 V at 20℃.It showed that m-PBI/g-C_(3)N_(4) composite membrane has a good application prospect for acid-alkaline amphoteric water electrolysis.

关 键 词：m-PBI g-C_(3)N_(4) Composite membrane Water electrolysis 

分 类 号：TQ116.2[化学工程—无机化工] TB383.2[一般工业技术—材料科学与工程]