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Batteries, Fuel Cells, and Electrochemical Processesx

Alternative Designs to Harness Natural Convection in Flow Batteries

A. Ansari [1], S. Kumar [1],
[1] Department of Chemical Engineering, Indian Institute of Science, Bangalore, Karnataka, India

The earlier work in our group has established that natural convection plays a dominant role in SLRFB. We used it to run a battery in which interestingly, the contents are agitated for brief spells when no current flows through it. The present work focuses on electrode configurations ... Mehr lesen

Investigation of Performance of SOFC in Hydrocarbon Fuel

S. T. Aruna [1], S. Senthil[1], S. Chauhan [1], B. Shriprakash [1],
[1] CSIR-National Aerospace Laboratories, Bangalore, Karnataka, India.

SOFC is a high temperature electrochemical device known for its fuel flexibility. Apart from using pure hydrogen, it can utilize CO (carbon monoxide), CH4 (methane) or any other higher hydrocarbon. Since methane is highly researched hydrocarbon fuel, it was chosen to start with. The most ... Mehr lesen

Optimization of an Electrochemistry System

D. Mi [1],
[1] KEISOKU Engineering System Co., Ltd., Chiyoda-ku, Tokyo, Japan

Optimization of a typical electrochemical system with insulating shields is considered in this work, which objective is to reduce the current peak due to singularity and smooth the current density distribution along electrode surface. Moving mesh method was adopted to allow change in ... Mehr lesen

Two-Dimensional Simulation of All-Solid-State Lithium-ion Batteries

L. Tong [1],
[1] Keisoku Engineering System Co., Ltd., Chiyoda-ku, Tokyo, Japan

There is great interest in developing all-solid-state lithium-ion batteries. They are ideal micro-power sources for many applications in portable electronic devices, electric vehicles and biomedical engineering. It is known that all-solid-state lithium-ion batteries are often fabricated ... Mehr lesen

Uniform Reaction Rates and Optimal Porosity Design for Hydrogen Fuel Cells

J. H. Al-Smail [1]
[1] King Fahd University of Petroleum & Minerals, Dhahran, Saudi Arabia

We develop a porosity-optimization problem to improve the electrochemical reactions taking place in hydrogen fuel cells. We introduce a mathematical model, which involves a system of conservation laws defined in a porous space domain. Our goal is to find the domain's optimal porosity ... Mehr lesen

Effect of Pretreatments on Throwing Power of Sacrificial Metallic Coatings

J. S. Lee [1],
[1] Naval Research Laboratory, Stennis Space Center, MS, USA

Sacrificial metallic coatings (e.g. Mg-Rich Primer [MgRP]) have been evaluated for protection of aircraft aluminum alloy AA2024-T351 in marine immersion and atmospheric conditions. MgRP is designed to create a galvanic couple between the Al substratum and the Mg pigment in the primer. ... Mehr lesen

Analysis of an Electrochemical Machining Process for Particle Reinforced Aluminum-Matrix Composites

M. Hackert-Oschätzchen [1], N. Lehnert [1], C. Scherf [2], A. Martin [1], M. Penzel [1], A. Schubert [3],
[1] Professorship Micromanufacturing Technology, Technische Universität Chemnitz, Chemnitz, Germany
[2] Fraunhofer Institute for Machine Tools and Forming Technology, Chemnitz, Germany
[3] Professorship Micromanufacturing Technology, Technische Universität Chemnitz, Chemnitz, Germany; Fraunhofer Institute for Machine Tools and Forming Technology, Chemnitz, Germany

At the Technische Universität Chemnitz several academic institutions work on aluminum matrix composites (AMCs) within the Collaborative Research Centre SFB 692 HALS. Besides the development and analysis of these materials one main task is finishing machining of AMCs by an electrochemical ... Mehr lesen

Thermal Analysis on Module Level in an Automotive Battery Package

Z. Wu [1], H. Kemper [1],
[1] Energy Storage Systems, FH Aachen, Aachen, Germany

Vehicles with battery as energy storage fascinate more and more people. Meanwhile, more questions are surfaced – How to ensure a safe operation of the battery package? How long could the cycle life of a battery package reach? Can a battery package be operated in any environmental ... Mehr lesen

Effect of Intercalation Diffusivity When Simulating Mixed Electrode Materials in Li-Ion Batteries

E. Wikner [1],
[1] Chalmers University of Technology, Gothenburg, Sweden

This paper is about the influence of the diffusion coefficient when simulating mixed electrode materials. The results show that when simulating dynamic behavior of a lithium ion battery cell with mixed electrode material the diffusion coefficients is very important. Mehr lesen

Modeling and Simulation of Thermal Runaway in Cylindrical 18650 Lithium-Ion Batteries

A. M. Melcher [1], C. Ziebert [1], B. Lei [1], M. Rohde [2], H. J. Seifert [2]
[1] Karlsruhe Institute of Technology, IAM-AWP, Karlsruhe, Germany
[2] Karlsruhe Institute of Technology, Karlsruhe, Germany

In this work the coupled electrochemical-thermal model for a lithium-ion battery (LIB) based on porous electrode theory has been extended with contributions coming from exothermic side reactions based on an Arrhenius law to model abuse mechanisms, which could lead to a thermal runaway. ... Mehr lesen

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