2-D Modeling of CO2 Electrolysis Using Gas Diffusion Electrode Operate at Neutral pH and Mild Conditions
A. Monteverde Videla, N. Vasile, G. Saracco
 Istituto Italiano di Tecnologia, Centre for Sustainable Future Technologies, Turin, Italy
CO2 capture and further conversion into valuable products can be a promising solution against global warming. Normally, CO2 conversion can be achieved by chemical methods, by photocatalytic and electrocatalytic reduction . Specifically for electrocatalytic reduction of CO2, challenges remain, such as the slow kinetics of CO2 electro-reduction, even when high electrode reduction potential are ...
Michael A. Vallance
Team Leader, GE Global Research
Over time, rechargeable batteries degrade and eventually stop working. You see some combination of declining capacity, rapid self-discharge, and reduced power. Degradation mode depends on battery design, but also on the application. Often, multiple physical processes contribute to degradation. In the laboratory, you can measure performance degradation. You can dissect the battery to discover ...
Reverse Electrodialysis Process with Seawater and Concentrated Brines: a COMSOL Multiphysics® Model for Equipment Design
M. Tedesco, A. Cipollina, C. Scavuzzo, A. Tamburini, G. Micale
Dipartimento di Ingegneria Chimica, Gestionale, Informatica, Meccanica (DICGIM), Università di Palermo (UNIPA), Palermo, Italy
Salinity Gradient Power (SGP) is a promising renewable energy source associated to the controlled mixing of two aqueous solutions of different salinities. Recently, Reverse Electrodialysis process (SGP-RE, or RED) has been identified as a successful way for the exploitation of such energy source, allowing the conversion of SGP directly into electric energy. COMSOL Multiphysics® modelling ...
Dependence of the Current Density Distribution with Flow Channel Geometry in a Half-Cell Model - new
O. Beruski, J. Perez
Institute of Chemistry of São Carlos, São Carlos, SP, Brazil
The present work demonstrates that a simple half-cell model is capable of reproducing qualitatively the main features of the measurements of the current density distribution in a high-temperature polymer electrolyte fuel cell, pointing that computational modeling and simulation are an important tool in the development of such devices. Our main interests with such a model is to optimize working ...
贾明 , 汤依伟 , 程昀 , 杜双龙 ,
基于电化学-热耦合模型，模拟了常温条件下 LiFePO4 /Graphite 锂离子电池的放电过程，并对电池内部正负电极各个位置的电化学反应速度演化规律进行了模拟计算研究。结果表明：放电过程中电极各处的反应速率不同，且是动态变化的。 Electrochemical Thermal Model Based Research for Electrochemical Performance of Lithium Ion Batteries Jia Ming, Tang Yiwei, Cheng Yun, Du Shuanglong, Li Jie (School of Metallurgy and Environment, Central South University, Changsha City, 410083, China) Abstract: An electrochemical ...
J. B. Sangiri , S. Ghosh , C. Chakraborty
 Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, India
Lithium-ion batteries are most preferable energy storage devices for its higher energy density, flexible form factor and lightweight design than comparable battery technologies. The present simulation work is focused on incorporating contact thermal resistance within a two-dimensional thermal model of Lithium-ion pouch cells. In the present study COMSOL Multiphysics® software has been used to ...
T. Struckmann , M. William Nix , S. Ressel ,
 Hamburg University of Applied Sciences, Department of Mechanical Engineering and Production Management, Hamburg, Germany
Redox flow batteries are promising candidates for future stationary electrical energy storage systems. All vanadium redox flow batteries (VRFBs) are already used in demonstration projects (see e.g. ). While the common VRFB cell design is planar, a tubular cell design might display advantages as reduced sealing lengths and reduced manufacturing costs due to an extrusion production. In this ...
朱国利 , 李亚东 , 李焰 ,
管道输送是油气能源长距离输送的重要途径。目前管道连接多采用焊接完成，焊接是一个复杂的非平衡物理化学过程，焊接接头各组成部分的成分、组织和性能都存在差异，同时还容易产生裂纹、气孔、夹杂和未熔合等焊接缺陷和较大的残余应力，使得焊接接头成为管道工程中的薄弱环节。在服役介质中，焊接接头存在宏观腐蚀电池与微观腐蚀电池耦合的多相电化学反应而引起局部腐蚀，可能导致整个构件失效，引发严重的安全事故，造成重大的经济损失甚至人身伤亡。利用 COMSOL Multiphysics® 多物理场仿真软件的腐蚀模块和二次电流分布接口对 X80 钢焊接接头在 CO2 饱和的 NACE 溶液中的电流密度及电位分布进行了仿真，并利用参数化扫描功能，模拟了焊缝与母材不同比例条件下的腐蚀行为。（图1）、（图2）、（图3）和（图4）分别为焊缝：母材=1:3和1:8条件下焊接接头在 NACE 溶液中的电流密度和电位分布 ...
J. Lannelongue , M. Cugnet , A. Kirchev ,
 Université Grenoble Alpes INES, Le Bourget du Lac, France
 CEA, LITEN, Grenoble, France
Introduction: The drawbacks of most commercial “advanced battery” solutions are high price, danger, and low recyclability. The most cost efficient, environmental-friendly, and safest solutions so far is based on lead-acid electrochemistry, a proven technology for more than 150 years. Key problems of this technology are however the limited cyclability which results in a reduced lifetime and high ...
Hörmann, Johannes (何约翰) , Meng, Yonggang (孟永钢) ,
 State Key Laboratory of Tribology, Tsinghua University, Beijing, China
In solution, sodium dodecyl sulfate (SDS) (structure shown in Fig. 1) can form a boundary film on metal surfaces. Previous studies have extensively investigated the characteristics of such surfactant films experimentally . A dependency of SDS surface concentration and film structure on the metal's electric potential has been demonstrated, in aqueous as well as in non-aqueous solutions. ...