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A stable ion-solvating PBI electrolyte enabled by sterically bulky naphthalene for alkaline water electrolysis

文献类型：期刊论文

作者Hu, Bin1,3; Huang, Yingda3; Liu, Lei4; Hu, Xu1,3; Geng, Kang1,3; Ju, Qing1,3; Liu, Min1,3; Bi, Jicheng1,3; Luo, Shuangjiang2; Li, Nanwen1,3
刊名JOURNAL OF MEMBRANE SCIENCE
出版日期2022-03-01
卷号643页码:11
关键词Polybenzimidazoles Alkaline water electrolysis Alkaline stability
ISSN号0376-7388
DOI10.1016/j.memsci.2021.120042
英文摘要Ion-solvating membranes based on polybenzimidazoles (PBI) have attracted increasing attention in alkaline water electrolysers due to their robust mechanical strength and excellent gas-tightness. However, they suffer from significant chemical degradation under alkaline conditions, especially at elevated temperature. Herein, we present an alkaline-stable ion-solvating membrane based on poly (2,2'-(1,4-naphthalene)-5,5'-bibenzimidazole) (NPBI) for alkaline water electrolysis application. The chemical composition and electrochemical properties of NPBI based ion-solvating membrane with bulky naphthyl groups around benzimidazolide C2 position was investigated when doping with different concentrations of KOH. More importantly, compared to poly (2,2'-(m-phenylene)-5,5'-bibenzimidazole) (m-PBI) membrane with sole phenyl next to the benzimidazolide moieties, ex situ alkali stability test in 6 M KOH at 80 degrees C for 228 days demonstrated that introducing bulky naphthyl moieties around benzimidazolide C2 position in the backbones could increase the alkaline resistance for NPBI membrane, which agree well with model compounds investigation. In alkaline water electrolysis tests circulating 6 M KOH solution at 90 degrees C, membrane electrode assembly (MEA) with NPBI membrane demonstrated a current density of 2.5 A/cm(2) at 2.01 V. Preliminary durability study of alkaline electrolysers was undertaken at 0.5 A/cm(2) and 90 degrees C, demonstrating the excellent durability for NPBI-based MEA that stably operated for 298 h, while gradual voltage increase was observed after 148 h for the electrolyser with m-PBI membrane attributable to the significant chemical degradation of the membrane.
WOS关键词ANION-EXCHANGE MEMBRANES ; POLYMER ELECTROLYTE ; DOPED POLYBENZIMIDAZOLE ; DEGRADATION ; STABILITY ; TERPHENYL ; HYDROGEN
资助项目National Natural Science Foundation of China[21835005] ; National Natural Science Foundation of China[21975002] ; Science and Technology Major Projects of Shanxi Province of China[20181102019] ; Hundred Talents Program of the Shanxi Province ; STS Project of Chinese Academy of Sciences[KFJ-STS-QYZD-2021-02-003] ; Natural Science Foundation of Anhui province[2008085QB58]
WOS研究方向Engineering ; Polymer Science
语种英语
WOS记录号WOS:000718161500005
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; Science and Technology Major Projects of Shanxi Province of China ; Hundred Talents Program of the Shanxi Province ; STS Project of Chinese Academy of Sciences ; Natural Science Foundation of Anhui province
源URL[http://ir.ipe.ac.cn/handle/122111/51092]  
专题中国科学院过程工程研究所
通讯作者Liu, Lei; Luo, Shuangjiang; Li, Nanwen
作者单位1.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Beijing, Peoples R China
3.Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China
4.Anhui Normal Univ, Coll Chem & Mat Sci, Wuhu 241000, Peoples R China
推荐引用方式
GB/T 7714		 Hu, Bin,Huang, Yingda,Liu, Lei,et al. A stable ion-solvating PBI electrolyte enabled by sterically bulky naphthalene for alkaline water electrolysis[J]. JOURNAL OF MEMBRANE SCIENCE,2022,643:11.
APA Hu, Bin.,Huang, Yingda.,Liu, Lei.,Hu, Xu.,Geng, Kang.,...&Li, Nanwen.(2022).A stable ion-solvating PBI electrolyte enabled by sterically bulky naphthalene for alkaline water electrolysis.JOURNAL OF MEMBRANE SCIENCE,643,11.
MLA Hu, Bin,et al."A stable ion-solvating PBI electrolyte enabled by sterically bulky naphthalene for alkaline water electrolysis".JOURNAL OF MEMBRANE SCIENCE 643(2022):11.

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来源：过程工程研究所

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