摘要
为解决碱性电解水复合隔膜中纳米填料易脱落及低电阻与高气密性难以协同优化的问题,采用梯度纳米复合策略,以不同粒径分布(<100与200~400 nm)的ZrO_(2)为功能填料,通过相转化法制备了具有颗粒协同作用的多层级复合隔膜。通过面电阻、气泡点压力、力学性能等测试筛选出最佳复合质量比,并与商用Zirfon 500隔膜进行了电解性能对比。结果表明,当粒径<100 nm与粒径200~400 nm ZrO_(2)质量比为1∶2时,制备的隔膜(Z_(12))表面展现出纳米颗粒均匀分散的状态,在关键性能指标上实现了突破性平衡:面电阻低至0.267Ω·cm^(2),气泡点压力高达0.70 MPa,抗拉强度达13.413 MPa,同时具备优异的热稳定性与耐碱性;在1.9 V工作电压下,其电流密度(83.10 mA/cm^(2))较Zirfon 500膜(77.97 mA/cm^(2))提升5.13 mA/cm^(2);当膜厚优化降至220μm时制备的Z_(12)-220电流密度(93.98 mA/cm^(2))较Z_(12)增加了10.88 mA/cm^(2)。
To address the issues of easy shedding of nano-fillers in alkaline electrolytic water composite membrane and the difficulty in synergistic optimization on low resistance and high airtightness,a gradient nanocomposite strategy was adopted to prepare multilayered composite membranes with particle synergy by a phase transition method using zirconia particles with multiple particle-size distributions(<100 and 200~400 nm)as functional fillers.The optimal composite mass ratio of membrane was screened by systematic tests of surface resistance,bubble point pressure,and mechanical properties,and the electrolytic performance was compared with that of commercial Zirfon 500 membrane.The results demonstrated that when the mass ratio of zirconia with particle size<100 nm and that with particle size 200~400 nm was 1∶2,the prepared membrane(Z_(12))exhibited uniform surface nanoparticle dispersion and achieved breakthrough balance in key performance metrics of area resistance as low as 0.267Ω·cm^(2),bubble point pressure as high as 0.70 MPa,and tensile strength as high as 13.413 MPa,along with excellent thermal stability and alkali stability.At an operating voltage of 1.9 V,its current density(83.10 mA/cm^(2))exceeded that of Zirfon 500 membrane(77.97 mA/cm^(2))by 5.13 mA/cm^(2).When membrane thickness was optimized to 220μm,the Z_(12)-220 membrane demonstrated a current density of 93.98 mA/cm²,representing a 10.88 mA/cm^(2) increase compared to standard Z_(12).
作者
陈朴
高峰
陈华
胡海兵
刘明芳
詹晓力
张庆华
CHEN Pu;GAO Feng;CHEN Hua;HU Haibing;LIU Mingfang;ZHAN Xiaoli;ZHANG Qinghua(College of Chemical and Biological Engineering,Zhejiang University,Hangzhou 310027,Zhejiang,China;Zhejiang University of Science and Technology,Hangzhou 310023,Zhejiang,China)
出处
《精细化工》
北大核心
2026年第3期486-493,共8页
Fine Chemicals
基金
浙江省“尖兵领雁”项目(2023C01226)。
关键词
碱性电解水
梯度纳米复合策略
氧化锆
相转化法
面电阻
气泡点压力
功能材料
alkaline electrolytic water
gradient nanocomposite strategy
zirconia
phase transition method
area resistance
bubble point pressure
functional materials
