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JOURNAL OF APPLIED POLYMER SCIENCE · 2013 ·Vol. 130 ·期 2 ·1058-1063 · IF 1.395

Preparation and gel properties of poly(ether ether ketone) with pendent sulfonimide groups

Xiulan Zhao,Qin Zhang,Lixin Xue,Qianru Shi,Kang Tao

Poly(ether ether ketone) with pendent sulfonimide groups (B-SPEEK) was prepared from poly(ether ether ketone), sulfuric acid, thionyl chloride, para -toluene sulfonate, and pyridine. The prepared B-SPEEK was characterized by Fourier transform infrared spectroscopy, 1 H-NMR, and thermogravimetric analysis. The swelling of the gels was examined in N,N -dimethylacetamide (DMAC), N,N -dimethylformamide (DMF), 1-methyl-2-pyrrolidinone (NMP), dimethyl sulfoxide (DMSO), and a DMSO/water mixture. The gel showed extremely high swelling in DMSO, DMF, DMAC, and NMP. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 1058-1063, 2013

研究领域: 材料科学 · 高分子化学

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CHEMICAL ENGINEERING JOURNAL · 2024 · IF 13.3

Proton exchange membranes with functionalized sulfonimide and phosphonic acid groups for next-generation fuel cells operating at 120 °C

Yucong Liao,Shengqiu Zhao,Guoliang Liu,Hao Li,Jiaqi Shuai,Letian Wang,Bingxuan Liu,Haolin Tang

Proton exchange membrane fuel cells (PEMFCs) face a significant challenge when operating in high-temperature and low-humidity environments, the hydrocarbon-based polymers that are sulfonated or phosphonated can’t meet the demand for achieving high performance. Modifying perfluorosulfonyl fluoride (PFSF) through meticulous design of side-chain chemical structures and introducing functionalized sulfonimide and phosphonic acid groups. Membranes derived from a perfluorocarbon backbone and polyacid side chain structures exhibit distinct microphase separation. The sulfonimide group exhibits hyper-acidic properties, whereas the phosphonic acid group functions as proton acceptor and donor. These two groups work synergistically to establish a distinct proton transport channel. The robust adsorption between acidic functional groups and water molecules enhances the diffusion of water molecules, resulting in an increase in proton conductivity. Moreover, Density Functional Theory (DFT) calculations reveal that the phosphonic acid group of the side chain has difficulty forming anhydrides. The prepared perfluorosulfonimide-phosphonic acid (PFSNPA) proton exchange membrane demonstrates an impressive conductivity of 263 mS·cm −1 at 120 °C. In H 2 /Air fuel cell tests, PFSNPA achieves an outstanding output power of 1076.1 mW·cm −2 at 120 °C and 40 % RH. This study introduces a new approach for designing and fabricating proton exchange membrane materials for high-temperature fuel cells.

CAS / MDL: 74-96-4 67-68-5 68-12-2 392-56-3 121-44-8

研究领域: 材料科学 · 能源工程

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Preparation and gel properties of poly(ether ether ketone) with pendent sulfonimide groups

Proton exchange membranes with functionalized sulfonimide and phosphonic acid groups for next-generation fuel cells operating at 120 °C