Tuning the Interfacial Electrical Field of Bipolar Membranes with Temperature and Electrolyte Concentration for Enhanced Water Dissociation

Zhang, Huanlei1,2; Cheng, Dongbo1,2; Xiang, Chengxiang3; Lin, Meng1,2

2023-05-15

10.1021/acssuschemeng.3c00142

ACS SUSTAINABLE CHEMISTRY & ENGINEERING   影响因子和分区

2168-0485

["A coupled experimental and numericalstudy was performedfor afundamental understanding of the impact of operating conditions, i.e.,temperature and electrolyte concentration, as well as interfacialabruptness, on the bipolar membrane (BPM) performance. A comprehensivemultiphysics-based model was developed to optimize the operation conditionand interfacial properties of BPM, and the model was used to guidethe design and engineering of high-performing BPMs. The origin ofthe enhanced BPM performance at a high temperature was identified,which was attributed to the intrinsic reaction rate enhancement aswell as the increase in electrolyte ionic conductivity. The experimentallydemonstrated current density-voltage characteristics of BPMsclearly exhibited three distinctive regions of operation: ion-crossoverregion, water dissociation region, and water-limiting region, whichagreed well with the multiphysics simulation results. In addition,the model revealed that a sharper interfacial abruptness led to improvedBPM performance due to the enhanced interfacial electric field atthe water dissociation region. The decrease of the electrolyte concentration,which increased the dielectric constant of the electrolyte, enhancedthe interfacial electric field, leading to improved electrochemicalperformances. The present study offers an in-depth perspective tounderstand the species transport as well as water dissociation mechanismunder various operation conditions and membrane designs, providingthe optimal operation conditions and membrane designs for maximizingthe BPM performance at high current densities.","The performance of BPM can be enhancedto save energy byoperating at higher temperatures and with a lower electrolyte concentration."]

bipolar membrane enhanced water dissociation multiphysical model temperature effects junctionlayer properties

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China[52006097] ; Shenzhen Science and Technology Innovation Commission[GJHZ20210705141808026] ; Guangdong Basic and Applied Basic Research Foundation[2023A1515011595] ; Gangdong grant[2021QN02L562] ; U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Fuels from Sunlight Hub[DE-SC0021266]

Chemistry ; Science & Technology - Other Topics ; Engineering

Chemistry, Multidisciplinary ; Green & Sustainable Science & Technology ; Engineering, Chemical

WOS:001010980300001

AMER CHEMICAL SOC

20232314187875

Current density ; Dissociation ; Electric fields ; Membranes ; Multiphysics

Electricity: Basic Concepts and Phenomena:701.1 ; Electric Batteries and Fuel Cells:702 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Materials Science:951

Web of Science

1.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, SUSTech Energy Inst Carbon Neutral, Shenzhen 518055, Peoples R China
3.CALTECH, Dept Appl Phys & Mat Sci, Liquid Sunlight Alliance, Pasadena, CA 91125 USA

Zhang, Huanlei,Cheng, Dongbo,Xiang, Chengxiang,et al. Tuning the Interfacial Electrical Field of Bipolar Membranes with Temperature and Electrolyte Concentration for Enhanced Water Dissociation[J]. ACS SUSTAINABLE CHEMISTRY & ENGINEERING,2023,11(21):8044-8054.

Zhang, Huanlei,Cheng, Dongbo,Xiang, Chengxiang,&Lin, Meng.(2023).Tuning the Interfacial Electrical Field of Bipolar Membranes with Temperature and Electrolyte Concentration for Enhanced Water Dissociation.ACS SUSTAINABLE CHEMISTRY & ENGINEERING,11(21),8044-8054.

Zhang, Huanlei,et al."Tuning the Interfacial Electrical Field of Bipolar Membranes with Temperature and Electrolyte Concentration for Enhanced Water Dissociation".ACS SUSTAINABLE CHEMISTRY & ENGINEERING 11.21(2023):8044-8054.