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Electrochemical (EC) Capacitors

30 January 2017 | Congress Centrum Mainz | Mainz, Germany

Part of the 7th Advanced Automotive Battery Conference Europe

This symposium will examine the latest technological advancements in electrochemical capacitors for automotive applications. Session 1, Advances in EC Capacitor Materials and Cell Design will explore the latest advances in materials—including the development of advanced materials and processes to meet the pricing threshold of important markets—and in capacitor design—including the development of advanced asymmetric ECs. Session 2, New EC Capacitor Products will review new capacitor products and EC business development activity. Leaders from key companies will discuss present and future products and business development strategies as they expand their product offerings to support the growth of energy-efficient industrial, utility, and transportation-related energy-storage systems. Session 3, EC Capacitor Storage System Applications will review EC module design and system engineering, including those related to transportation, to industrial energy conservation, and to the utility grid.

 Final Agenda

Monday, 30 January


8:30 Symposium Registration and Morning Coffee

10:00 Chairperson’s Opening Remarks

Katsuhiko Naoi, Ph.D., Professor of Chemistry, Institute of Symbiotic Science & Technology, Tokyo University of Agriculture & Technology

10:05 Future Perspective of Supercapacitors’ Nanomaterials

Katsuhiko Naoi, Ph.D., Professor of Chemistry, Institute of Symbiotic Science & Technology, Tokyo University of Agriculture & Technology

To meet growing demands for electric automotive(xEV) applications, hybrid (battery+capacitor) EES can overcome the energy density limitation of the conventional EDLCs. In light of this, the author’s group invented/developed an original material processing technology called “ultracentrifugation (UC)” that allows to prepare varieties of ultrafast nanomaterials for hybrid supercapacitors.

10:25 Materials Selection for Asymmetric/Hybrid Supercapacitors

Margret Wohlfahrt-Mehrens, Ph.D., Head, Materials Research Accumulator (ECM), ZSW – Zentrum für Sonnenenergie- und Wasserstoff-Forschung, Baden-Württemberg, Germany

Hybrid supercapacitors using composite electrodes combining both high double layer capacitance and battery like lithium insertion materials provide much higher energy density compared to classical double layer supercapacitors (EDLC). Various new combinations of composite electrodes for anode and cathode will be presented. The presentation will discuss in detail: 1). Selection of lithium insertion materials for composite electrodes 2). Influence of composition ratio activated carbon/lithium insertion material 3). Influence of mass balancing of anode and cathode in complete cells.

10:45 Rational Design of Innovative Electrolytes for Supercapacitors

Andrea Balducci, Ph.D., Professor, Institute for Technical Chemistry and Environmental Chemistry, Center for Energy and Environmental Chemistry (CEEC), Friedrich-Schiller-University Jena

The development of innovative electrolytes is essential for the development of advanced electrolytes. In the near future new solvents, new salt as well as new ionic liquids should be identified and investigated. This search should generate a “new wave” of innovative electrolyte components, able to display a well-balanced set of properties, high safety and reasonable cost. In this presentation the use of computation screening for the identification of innovative electrolytes will be considered.

11:05 Networking Coffee Break with Poster Viewing

11:35 High Density Oxides for Aqueous Asymmetric Supercapacitors for Improved Volumetric Properties

Olivier Crosnier, Ph.D., Assistant Professor, Jean Rouxel Institute of Materials, University of Nantes, France

Pseudocapacitive electrodes can be of interest in order to improve the volumetric energy density of electrochemical capacitors. For example, an asymmetric FeWO4/MnO2 supercapacitor has been assembled. The full device can be operated between 0 and 1.4 V in a neutral aqueous electrolyte with remarkable cycling stability. The charge storage mechanisms and the cell performance will be presented in this presentation.

11:55 Lithium-Ion Capacitor with Low Footprint Sacrificial Material for Graphite Pre-Lithiation

François Béguin, Ph.D., Professor, Power Sources Group, Poznan University of Technology, Poland

We continue our efforts to designing Lithium-ion capacitors (LIC) without auxiliary metallic lithium electrode. The strategy is based on the use in the positive activated carbon electrode of a sacrificial material from which lithium is irreversibly extracted and intercalated in the negative graphite electrode. After having explored irreversible oxides and organic compounds, we now investigate negligible footprint materials which are delithiated with gas evolution. The performance of the resulting LIC will be shown in detail.

12:15 2-D Materials for Capacitive Storage

Patrice Simon, Ph.D., Professor, Université Paul Sabatier

We will present latest results obtained on 2D titanium carbide (Ti3C2Tx MXene) in both organic and neat ionic liquid electrolytes. In neat EMI-TFSI electrolyte, a capacitive behavior was observed within a large electrochemical potential range (from -1.5 to 1.5 V vs. Ag). The intercalation and de-intercalation of EMI+ cations and/or TFSI- anions, investigated by in situ X-ray diffraction technique, highlighted the presence of two different intercalation mechanisms, depending on the electrode polarity. These results open new path for designing high energy and power supercapacitors based on the use of MXene materials.

 12:35 Q&A

12:50 Networking Lunch

14:15 Chairperson’s Remarks

Andrew F. Burke, Ph.D., Institute of Transportation Studies, University of California, Davis

14:20 An Industrial Perspective on Supercapacitor Carbons

Ranjan Dash, Advanced Programs Technologist, Future Business, SABIC

Supercapacitor carbons have been the focus of extensive research over the past couple of decades. Carbon–carbon supercapacitors offer higher power, better cycle life, and higher reliability than batteries, but have much lower energy density and higher self-discharge. Recently, Lithium-ion capacitors, which combine a supercapacitor carbon cathode with a lithiated carbon anode, have been commercialized. Lithium-ion capacitors offer higher energy density and lower self-discharge than carbon-carbon supercapacitors; the capacity of the supercapacitor carbon cathode remains as the factor limiting energy density.

14:40 Carbon Black Additives for Electrochemical Capacitors: Impact on Capacity and Cycle Life

Miki Oljaca, Ph.D., Director, R&D and Applications, Cabot Corporation

Electrochemical capacitors (EC) are finding broader use in automotive and other applications. Carbon blacks are typically used as conductive additives to activated carbon electrodes used in EC devices. In this talk, we will discuss specialty carbon black additive with high capacitance similar to activated carbons. We will discuss use of this new additive in EC devices where it can be combined with activated carbons to improve both power and capacity of EC electrodes. We will also discuss how tailoring of carbon black properties can impact electrode density and cycle life of EC devices.

15:00 Coarse-Grained Carbide-Derived Carbon Supercapacitor Electrodes for Automotive Applications

Boris Dyatkin, NRC Post-Doctoral Researcher, U.S. Naval Research Laboratory

We have developed a novel energy storage electrode composed of 75 – 250 µm diameter particles with a finely tuned microporosity, a specific surface area in excess of 1700 m2/g, and high capacitive performance. We successfully demonstrated high performance of 1 mm thick films, which has been, to date, unprecedented in supercapacitor technology, and increased areal capacitance above 8 F/cm2. Ionic liquid electrolytes extended the voltage window of electrodes above 3.1 V and improved their energy densities.

15:20 Q&A

15:35 Refreshment Break with Poster Viewing

New EC Capacitor Products

16:10 Chairperson’s Remarks

Andrew F. Burke, Ph.D., Institute of Transportation Studies, University of California, Davis

16:15 Review of Supercapacitors Performance Characteristics and Vehicle Applications in Combination with Batteries

Andrew F. Burke, Ph.D., Institute of Transportation Studies, University of California, Davis

In this paper, the present status of electrochemical supercapacitor performance will be reviewed based on testing of commercially available devices and proto-type devices being developed in various countries around the world. Test results are given for the energy density, power capability, and temperature characteristics of the devices from data taken at UC Davis.

16:35 Enhanced Energy of Water-Based Electrochemical Capacitor

Elzbieta Frackowiak, Ph.D., Professor, Poznan University of Technology

The application of aqueous electrolytes with a redox activity of halides (iodides, bromides) and pseudohalides is an attractive way to enhance capacitance values, in turn, capacitor energy. Additionally, a different combination of electrolytes for positive and negative electrodes has been utilized to increase the voltage range of capacitor. The capacitor characteristics obtained in aqueous electrolytes are comparable to the parameters obtained in organic medium.

16:55 Combined Battery/Supercapacitor Hybridised Energy Storage Systems for Hybrid Electric Vehicles

Wasim Sarwar, Energy Storage Systems Research Engineer, Jaguar Land Rover; Department of Mechanical Engineering, Imperial College London, UK

Automotive OEMs are striving to increase the electric driving range of electrified vehicles without compromising performance. This requires an increase of both the energy and power density of the Energy Storage System (ESS), however in battery design these two attributes are generally mutually exclusive, therefore a compromise must be made. This presentation examines whether a Hybridised Energy Storage System could result in an ESS with improved energy and power density in comparison to a battery only system, and explores the system level implications.

17:15 Novel Carbon Materials for Supercapacitors

Vinod M. Nair, Chief Technology Officer, FaradPower

Currently, commercial supercapacitors are manufactured using coconut shell based activated carbon. These carbons tend to have surface areas of approximately 1600 m2/g, pore volumes of about 0.75 cc/g and spefici capacitances of around 100 F/g. FaradPower is engaged in developing new methods for making activated carbon with a higher surface area, pore volume and specific capacitance values compared to the coconut shell based carbons. This talk will present some of the recent results obtained from these new carbon materials.

17:35 Recent Developments in Ultracapacitor Technologies

Ken Rudisuela, Chief Technical Officer, IOXUS, Inc.

The talk will cover the technology behind IOXUS new high temperature EDLC. The significance of this development in durability, product life and market applicability will be explained. Finally, the new IOXUS engine start module will be introduced with its function and application described.

17:55 Q&A

18:15 Welcome Reception with Poster Viewing

19:15 Close of Day

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