Temperature difference-enhanced salinity gradient energy conversion enabled by thermostable hydrogel membrane with anti-swelling property  

作　　者：Zhehua Zhang Teng Zhou Xiang-Yu Kong Yadong Wu Weiwen Xin Yanglansen Cui Linsen Yang Tingyang Li Xin Li Qingchen Wang Weipeng Chen Lei Jiang Liping Wen 

机构地区：[1]Key Laboratory of Bio-inspired Materials and Interfacial Science,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100049,China [2]School of Future Technology,University of Chinese Academy of Sciences,Beijing 100049,PChina [3]College of Mechanical and Electrical Engineering,Hainan University,Haikou 570228,China [4]Binzhou Institute of Technology,Binzhou 256600,China

出　　处：《Nano Research》2023年第8期11288-11295,共8页纳米研究（英文版）

基　　金：supported by the National Key R&D Program of China(Nos.2022YFB3805904,2022YFB3805900,and 2020YFA0710401);the National Natural Science Foundation of China(Nos.22122207,21988102,and 52075138);CAS Key Laboratory of Bio-inspired Materials and Interfacial Science,Technical Institute of Physics and Chemistry(No.BMIS202102);China Postdoctoral Science Foundation(Nos.2022TQ0345,2022M723229,and 2022M713226);Postdoctoral International Exchange Talent-Introducing Program(No.YJ20220199).

摘　　要：Coupling low-grade heat(LGH)with salinity gradient is an effective approach to increase the efficiency of the nanofluidic-membrane-based power generator.However,it is a challenge to fabricate membranes with high charge density that ensures ion permselectivity,while maintaining chemical and mechanical stability in this composite environment.Here,we develop a bis[2-(methacryloyloxy)ethyl]phosphate(BMAP)hydrogel membrane with good thermal stability and anti-swelling property through self-crosslinking of the selected monomer.By taking advantage of negative space charge and three-dimensional(3D)interconnected nanochannels,salinity gradient energy conversion efficiency is substantially enhanced by temperature difference.Theoretical and experimental results verify that LGH can largely weaken the concentration polarization,promoting transmembrane ion transport.As a result,such a hydrogel membrane delivers high-performance energy conversion with a power density of 11.53 W·m^(−2)under a negative temperature difference(NTD),showing a 193%increase compared with that without NTD.

关 键 词：ion transport temperature difference-enhanced salinity gradient energy self-crosslinking hydrogel membranes space charge 

分 类 号：TQ427[化学工程]