膜
碱金属
碱性水电解
材料科学
化学工程
电解
复合材料
电解质
复合数
化学
电极
有机化学
生物化学
工程类
物理化学
作者
Lei Wan,Ziang Xu,Baoguo Wang
标识
DOI:10.1016/j.cej.2021.131340
摘要
• A green technique is designed to develop PTFE/LDH composite membranes by the pore-filling approach. • The good alkaline resistance of PTFE and LDH endows the PTFE/LDH composite membranes with highly alkaline stability. • The interface strength between membrane and catalyst layer in the PTFE/LDH composite membranes is significantly enhanced. • The MEA employing the PTFE/LDH-3 composite membrane specifically shows the voltage of 1.8 V at the current density of 1 A cm −2 . To prepare a hydroxide ion conduction membrane with highly alkaline resistance for advanced alkaline water electrolysis, a large-scale and green preparation strategy that pore-filling polytetrafluoroethylene (PTFE) membrane is proposed to fabricate robust alkaline composite membranes, simultaneously enhance the interfacial compatibility between catalyst layer and membrane in membrane electrode assembly (MEA). Upon the rational design, the PTFE/layered double hydroxide (LDH) composite membranes exhibit good hydroxide conductivity, excellent wettability and exceptional alkaline stability, especially showing no change of the area resistance during 2000 h test in 1 M KOH solution at 60 °C. In advanced alkaline water electrolysis, the MEA with PTFE/LDH composite membranes and precious group metal-free (PGM-free) catalysts specifically showed the voltage of 1.8 V at the current density of 1 A cm −2 , while that of commercial Fumasep FAA-3–50 membrane was 2.15 V. The long-term stability is conducted at a current density of 500 mA cm −2 for 180 h. Such performance with low-cost and mass-produced PTFE/LDH composite membranes demonstrates that the large-scale and green preparation strategy may drive the development of membranes for advanced alkaline water electrolysis.
科研通智能强力驱动
Strongly Powered by AbleSci AI