“Island-bridge”-structured nanofluidic membranes for high-performance aqueous energy conversion and storage  

作　　者：Yifu Gao Zhijia Zhang Xin Zhao Yao Wang Linxuan Sun Shunxiang Cao Yu Lei Baohua Li Dong Zhou Feiyu Kang 

机构地区：[1]Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China

出　　处：《Energy Materials and Devices》2024年第2期61-77,共17页能源材料与器件（英文）

基　　金：National Key Research and Development Program of China(Grant No.2022YFB2404500);Shenzhen Outstanding Talents Training Fund,the Fundamental Research Project of Shenzhen(Grant No.JCYJ20230807111702005);Guangdong Provincial Natural Science Foundation of China(Grant No.2022A1515110936);Shenzhen Science and Technology Program(Grant No.ZDSYS20230626091100001);National Natural Science Foundation of China(Grant No.22309102);China Postdoctoral Science Foundation(Grant No.2022M711788).

摘　　要：The attainment of carbon neutrality requires the development of aqueous energy conversion and storage devices.However,these devices exhibit limited performance due to the permeability-selectivity trade-off of permselective membranes as core components.Herein,we report the application of a synergistic approach utilizing two-dimensional nanoribbons-entangled nanosheets to rationally balance the permeability and selec-tivity in permselective membranes.The nanoribbons and nanosheets can be self-assembled into a nanoflu-idic membrane with a distinctive“island-bridge”configuration,where the nanosheets serve as isolated islands offering adequate ionic selectivity owing to their high surface charge density,meanwhile bridge-like nanorib-bons with low surface charge density but high aspect ratio remarkably enhance the membrane’s permeability and water stability,as verified by molecular simulations and experimental investigations.Using this approach,we developed a high-performance graphene oxide(GO)nanosheet/GO nanoribbon(GONR)nanofluidic membrane and achieved an ultrahigh power density of 18.1 W m^(-2) in a natural seawater|river water osmotic power generator,along with a high Coulombic efficiency and an extended lifespan in zinc metal batteries.The validity of our island-bridge structural design is also demonstrated for other nanosheet/nanoribbon composite membranes,providing a promising path for developing reliable aqueous energy conversion and storage devices.

关 键 词：nanofluidics two-dimensional nanoribbon ionic permselectivity osmotic energy generation aqueous zinc metal batteries 

分 类 号：TB3[一般工业技术—材料科学与工程]