标题: Diffusion-layer-free air cathode based on ionic conductive hydrogel for microbial fuel cells

作者: Li, Y (Li, Yi); Yang, WL (Yang, Wulin); Liu, X (Liu, Xue); Guan, WK (Guan, Weikai); Zhang, ER (Zhang, Enren); Shi, XW (Shi, Xiaowen); Zhang, XQ (Zhang, Xinquan); Wang, X (Wang, Xu); Mao, XH (Mao, Xuhui)

来源出版物: SCIENCE OF THE TOTAL ENVIRONMENT卷: 743文献号: 140836 DOI: 10.1016/j.scitotenv.2020.140836出版年: NOV 15 2020

摘要: High hydraulic pressure in air-cathode microbial fuel cells (MFCs) can lead to severe cathodic water leakage and power reduction, thereby hindering the practical applications of MFCs. In this study, an alternative air cathode without a diffusion layer was developed using a cross-linked hydrogel, oxidized konjac glucomannan/2-hydroxypropytrimethyl ammonium chloride chitosan (OM), for ion bridging. The cathode was placed horizontally to avoid hydraulic pressure on its surface. Ion transportation was sustained with a minimal OKH hydrogel loading of 10 mg/cm(2). A maximum power density of 1.0 +/- 0.04 W/m(2) was achieved, which was only slightly lower than the 1.28 +/- 0.02 W/m(2) of common air cathodes. Moreover, the cost of the OKH hydrogel is only $0.12/m(2), which can reduce similar to 85% of the cathode cost without using the advanced polyvinylidene fluoride diffusion layer. Therefore, the development of this new diffusion-layer-free air cathode using conductive ionic hydrogel provides a low-cost strategy for stable MFC operation, thereby demonstrating great potential for practical applications of MFC technology. (C) 2020 Published by Elsevier B.V.

入藏号: WOS:000573544500023

PubMed ID: 32758853

语言: English

文献类型: Article

作者关键词: Microbial fuel cell; Air cathode; Hydrogel; Diffusion layer

地址: [Li, Yi; Guan, Weikai; Shi, Xiaowen; Zhang, Xinquan; Wang, Xu; Mao, Xuhui] Wuhan Univ, Sch Resource & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430079, Peoples R China.

[Yang, Wulin] Penn State Univ, Dept Civil & Environm Engn, University Pk, PA 16802 USA.

[Liu, Xue] Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China.

[Zhang, Enren] Yangzhou Univ, Sch Chem & Chem Engn, Yangzhou 225002, Jiangsu, Peoples R China.

通讯作者地址: Wang, X (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430079, Peoples R China.

电子邮件地址:xu.wang@whu.edu.cn

影响因子：6.551