材料科学
共价键
质子
导电体
化学工程
无机化学
复合材料
有机化学
化学
量子力学
物理
工程类
作者
Hong Zhong,Zhihua Fu,Jared M. Taylor,Gang Xu,Ruihu Wang
标识
DOI:10.1002/adfm.201701465
摘要
Proton exchange membrane fuel cells usually suffer from severe power loss and even damage under subzero-temperature working surroundings, which restricts their practical use in cold climates and in high-altitude drones. One of the effective solutions to these issues is to develop new types of proton-conductive materials at subzero temperature. This study presents a series of acylhydrazone-based covalent organic gels (COGs). The COGs are stable in acidic media and show high proton conductivity over the temperature range of −40 to 60 °C under anhydrous conditions. Compared with other reported organic conductive materials, both a state-of-the-art conductivity of 3.8 × 10−4 S cm−1 at −40 °C and superior long-term stability are demonstrated. Moreover, the COGs possess remarkable self-sustainability, good processability, and superior mechanical properties, and may be processed and molded into any desirable shapes for practical applications. These advantages make COGs hold great promises as solid-state electrolytes under subzero-temperature operating conditions.
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