Covalent organic framework–based porous ionomers for high-performance fuel cells

Qingnuan Zhang; Shuda Dong; Pengpeng Shao; Yuhao Zhu; Zhenjie Mu; Dafei Sheng; Teng Zhang; Xin Jiang; Ruiwen Shao; Zhixin Ren; Jing Xie; Xiao Feng; Bo Wang

doi:10.1126/science.abm6304

Covalent organic framework–based porous ionomers for high-performance fuel cells

Qingnuan Zhang, Shuda Dong, Pengpeng Shao, Yuhao Zhu, Zhenjie Mu, Dafei Sheng, Teng Zhang, Xin Jiang, Ruiwen Shao, Zhixin Ren, Jing Xie, Xiao Feng^*, Bo Wang^*

^*此作品的通讯作者

科研成果: 期刊稿件 › 文章 › 同行评审

218 引用（Scopus）

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Lowering platinum (Pt) loadings without sacrificing power density and durability in fuel cells is highly desired yet challenging because of the high mass transport resistance near the catalyst surfaces. We tailored the three-phase microenvironment by optimizing the ionomer by incorporating ionic covalent organic framework (COF) nanosheets into Nafion. The mesoporous apertures of 2.8 to 4.1 nanometers and appendant sulfonate groups enabled the proton transfer and promoted oxygen permeation. The mass activity of Pt and the peak power density of the fuel cell with Pt/Vulcan (0.07 mg of Pt per square centimeter in the cathode) both reached 1.6 times those values without the COF. This strategy was applied to catalyst layers with various Pt loadings and different commercial catalysts.

源语言	英语
文章编号	378
期刊	Science
卷	378
期	6616
DOI	https://doi.org/10.1126/science.abm6304
出版状态	已出版 - 14 10月 2022

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title = "Covalent organic framework–based porous ionomers for high-performance fuel cells",

abstract = "Lowering platinum (Pt) loadings without sacrificing power density and durability in fuel cells is highly desired yet challenging because of the high mass transport resistance near the catalyst surfaces. We tailored the three-phase microenvironment by optimizing the ionomer by incorporating ionic covalent organic framework (COF) nanosheets into Nafion. The mesoporous apertures of 2.8 to 4.1 nanometers and appendant sulfonate groups enabled the proton transfer and promoted oxygen permeation. The mass activity of Pt and the peak power density of the fuel cell with Pt/Vulcan (0.07 mg of Pt per square centimeter in the cathode) both reached 1.6 times those values without the COF. This strategy was applied to catalyst layers with various Pt loadings and different commercial catalysts.",

author = "Qingnuan Zhang and Shuda Dong and Pengpeng Shao and Yuhao Zhu and Zhenjie Mu and Dafei Sheng and Teng Zhang and Xin Jiang and Ruiwen Shao and Zhixin Ren and Jing Xie and Xiao Feng and Bo Wang",

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AU - Zhang, Qingnuan

AU - Dong, Shuda

AU - Shao, Pengpeng

AU - Zhu, Yuhao

AU - Mu, Zhenjie

AU - Sheng, Dafei

AU - Zhang, Teng

AU - Jiang, Xin

AU - Shao, Ruiwen

AU - Ren, Zhixin

AU - Xie, Jing

AU - Feng, Xiao

AU - Wang, Bo

PY - 2022/10/14

Y1 - 2022/10/14

N2 - Lowering platinum (Pt) loadings without sacrificing power density and durability in fuel cells is highly desired yet challenging because of the high mass transport resistance near the catalyst surfaces. We tailored the three-phase microenvironment by optimizing the ionomer by incorporating ionic covalent organic framework (COF) nanosheets into Nafion. The mesoporous apertures of 2.8 to 4.1 nanometers and appendant sulfonate groups enabled the proton transfer and promoted oxygen permeation. The mass activity of Pt and the peak power density of the fuel cell with Pt/Vulcan (0.07 mg of Pt per square centimeter in the cathode) both reached 1.6 times those values without the COF. This strategy was applied to catalyst layers with various Pt loadings and different commercial catalysts.

AB - Lowering platinum (Pt) loadings without sacrificing power density and durability in fuel cells is highly desired yet challenging because of the high mass transport resistance near the catalyst surfaces. We tailored the three-phase microenvironment by optimizing the ionomer by incorporating ionic covalent organic framework (COF) nanosheets into Nafion. The mesoporous apertures of 2.8 to 4.1 nanometers and appendant sulfonate groups enabled the proton transfer and promoted oxygen permeation. The mass activity of Pt and the peak power density of the fuel cell with Pt/Vulcan (0.07 mg of Pt per square centimeter in the cathode) both reached 1.6 times those values without the COF. This strategy was applied to catalyst layers with various Pt loadings and different commercial catalysts.

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Covalent organic framework–based porous ionomers for high-performance fuel cells

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