Battery systems

Lectures

Posters

Volume and Thickness Change of NMC811|SiOx Graphite large format Lithium Ion Cells: from Pouch Cell to Active Material Level

The reversible thickness change of a large-format lithium-ion automotive pouch cell was investigated under precisely monitored cell pressure and temperature using an in-house built actively controlled pneumatic cell press. The quantitative and qualitative contribution of the state-of-the-art NMC811 cathode and the SiOx-graphite composite anode to the total pouch cell expansion

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Titration methods for the determination of hydroxides and carbonates in lithium metal oxide cathode materials

With lithium-ion batteries (LIBs) being one of the most important energy storage technologies today, there is also an increasing need for LIB production to become more sustainable.1 For the anode, aqueous processing has already been realised, eliminating the use of harmful N-methyl-2-pyrrolidone (NMP) during electrode fabrication.2 Unfortunately, the main obstacle

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Thickness change and jelly-roll deformation and its impact on the aging and lifetime of commercial 18650 cylindrical li-ion cells with silicon containing anodes and NCA cathodes

In this work, different commercial available cylindrical cells in the format 18650 with each NCA cathode and anodes containing different silicon materials were electrochemically long-term cycled. Multiple Computed Tomography (CT) images were carried out after a settled number of completed cycles. Two voltage windows and their influence on the aging

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Thickness change and jelly-roll deformation and its impact on the aging and lifetime of commercial 18650 cylindrical li-ion cells with silicon containing anodes and NCA cathodes

In this work, different commercial available cylindrical cells in the format 18650 with each NCA cathode and anodes containing different silicon materials were electrochemically long-term cycled. Multiple Computed Tomography (CT) images were carried out after a settled number of completed cycles. Two voltage windows and their influence on the aging

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The Impact of Thermal Gradients on the Aging Behavior of Lithium-Ion Batteries

Temperature is a dominant parameter in lithium-ion batteries’ aging behavior. Aging mechanisms in lithium-ion batteries correspond to unwanted side reactions, often associated with film formation on the electrodes. This work shows measurement results illustrating the effect of thermal gradients on the aging behavior of a commercial nickel-rich pouch lithium-ion battery.

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TEESMAT – Open Innovation Test Bed

TEESMAT is a platform to characterize electrochemical energy storage material and devices: Li-ion, Na-ion and all-solid-state batteries, printed Zn/Li batteries, lead-acid, metal-air, redox flow batteries and super-capacitors or any other kind of electrochemical device. TEESMAT is a unique pool of characterization techniques, brought by 8+ service providers, to probe the

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Substandard? Lithium-ion cells available on online marketplaces

Access to up-to-date information on lithium-ion cells is crucial for a wide range of academic research areas. However, researchers generally do not have access to the latest cells from large manufacturers and therefore have to rely cells available on online marketplaces. To quantify the state of these cells, we collected

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Substandard? Lithium-ion cells available on online marketplaces

Access to up-to-date information on lithium-ion cells is crucial for a wide range of academic research areas. However, researchers generally do not have access to the latest cells from large manufacturers and therefore have to rely cells available on online marketplaces. To quantify the state of these cells, we collected

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Silicon-Carbon Composite-Based Anodes for Lithium-Ion Batteries

Silicon-carbon composites (Si/C) are considered as one of the most promising candidates for anode active materials in high energy lithium-ion batteries. This research activity aims to develop scalable manufacturing processes of novel Si/C-based anode materials for lithium-ion batteries. To achieve anodic active material with high cycling stability, silicon nanoparticles are

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Recent development on materials, components, and processes for thiophosphate-based all-solid-state-batteries

All-solid-state lithium-ion batteries are promising candidates to overcome safety and energy limitations of common lithium-ion batteries. Although excellent results have been reported for sulfide based electrolytes on a small scale, classical slurry-based lithium-ion processing fails to reproduce the same performance in a larger cell. In this lecture, scalable concepts for

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Recent development on materials, components, and processes for thiophosphate-based all-solid-state-batteries

All-solid-state lithium-ion batteries are promising candidates to overcome safety and energy limitations of common lithium-ion batteries. Although excellent results have been reported for sulfide based electrolytes on a small scale, classical slurry-based lithium-ion processing fails to reproduce the same performance in a larger cell. In this lecture, scalable concepts for

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Recent development on materials, components, and processes for thiophosphate-based all-solid-state-batteries

All-solid-state lithium-ion batteries are promising candidates to overcome safety and energy limitations of common lithium-ion batteries. Although excellent results have been reported for sulfide based electrolytes on a small scale, classical slurry-based lithium-ion processing fails to reproduce the same performance in a larger cell. In this lecture, scalable concepts for

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Ragone Calculator: A Straightforward Tool to Determine Performance Metrics and Support Developments at an Application-Relevant Level

Science and industry worldwide are conducting intensive research into various ways to improve existing battery concepts or transferring novel concepts to application. The development of materials and electrodes is an essential step in this process. However, the evaluation of the achievolumetric energy density performance parameters and the comparison of the

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Quasi-In-Situ Scanning Electron Microscopy and Energy Dispersive X-ray Spectroscopy during Cyclic and Calendaric Aging of Silicon Nanoparticle Anodes

Obtaining a detailed understanding of cyclic and calendaric aging is essential for confronting the challenges of silicon anodes. Recent developments in in situ and in operando scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques showed insights into the volume expansion and associated crack formation during de-/lithiation of silicon.

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Proportionate Influence of Anode and Cathode Structuring on Electrode Characteristics and Cell Performance

Lithium-ion batteries (LIBs) are currently the dominating energy storage solution for most consumer electronics and electromobility applications. For an increased market penetration, further enhancements of the cell performance of LIBs are needed. Microscopic diffusion channels in the coatings of battery electrodes are a promising approach to improve the (dis)charge performance

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Physical-based interpretation of lithium-ion battery automotive-related ageing

Despite its fully commercial development status, lithium-ion battery (LIB) degradation understanding and diagnostics is still not fully consolidated, involving a number of interconnected mechanisms whose effect combines into a complexly mixed performance fade. State-of-health (SoH), while lacking a harmonized definition, is usually referred as a mere fade of capacity, lacking

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Physical-based interpretation of lithium-ion battery automotive-related ageing

Despite its fully commercial development status, lithium-ion battery (LIB) degradation understanding and diagnostics is still not fully consolidated, involving a number of interconnected mechanisms whose effect combines into a complexly mixed performance fade. State-of-health (SoH), while lacking a harmonized definition, is usually referred as a mere fade of capacity, lacking

Learn more »

Physical-based interpretation of lithium-ion battery automotive-related ageing

Despite its fully commercial development status, lithium-ion battery (LIB) degradation understanding and diagnostics is still not fully consolidated, involving a number of interconnected mechanisms whose effect combines into a complexly mixed performance fade. State-of-health (SoH), while lacking a harmonized definition, is usually referred as a mere fade of capacity, lacking

Learn more »

Physical Vapor Deposition of Metallic Lithium Layers and Lithiated Silicon Layers for High-Performance Anodes

Currently, significant worldwide research activities are carried out to accomplish more efficient energy storage methods and to overcome challenges in using regenerative energy continuously. For Li-ion batteries, the volumetric energy density may be increased considerably by substituting conventional graphite anodes with materials based on Si and also in prospective by

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Physical Vapor Deposition of Metallic Lithium Layers and Lithiated Silicon Layers for High-Performance Anodes

Currently, significant worldwide research activities are carried out to accomplish more efficient energy storage methods and to overcome challenges in using regenerative energy continuously. For Li-ion batteries, the volumetric energy density may be increased considerably by substituting conventional graphite anodes with materials based on Si and also in prospective by

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Optimized calibration of P2D lithium ion battery physical model following sensitivity-based multi-measurement protocol

This poster deals with the activities ongoing at Politecnico di Milano in the framework of the European Project DigiPrime, on lithium-ion batteries diagnostics and estimation of residual capabilities at end-of-life. It presents the development of a fast multi-measurement protocol that can ease the calibration of the pseudo-two-dimensional model (P2D) with

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Optimal battery cells for grid-serving applications

In the context of the energy transition and the resulting expansion of renewable energies, the electrical grid is changing. As generator-based nuclear and coal-fired power plants will be switched off, inverter-based feed-in battery plants have to provide the ancillary services to stabilize the electrical grid in the future. Grid services

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Optimal battery cells for grid-serving applications

In the context of the energy transition and the resulting expansion of renewable energies, the electrical grid is changing. As generator-based nuclear and coal-fired power plants will be switched off, inverter-based feed-in battery plants have to provide the ancillary services to stabilize the electrical grid in the future. Grid services

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Online impedancespectroscopy in micromobility

The ongoing transformation of the mobility sector to- wards more environmentally friendly transport systems is leading to increasing market penetration of electrified mobility solutions. As part of these solutions, personal micromobility represents a steadily growing market. The need for fast charging options results in increased requirements for thermal management and

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On the inhomogeneous nature of Li-intercalation and Li-plating on graphite-based anodes – an experimental study by means of high-resolution light microscopy under inert gas atmosphere

Lithium-ion batteries (LIBs) currently represent the dominant technology in the field of rechargeable mobile and stationary energy systems. In order to ensure the longest possible life time, critical ageing mechanisms must be prevented. This includes, in particular, anode-side Li deposition (“Li plating”), which can lead to a rapid shortening of

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Non-contacting chromatic confocal distance measurements of pouch cells during cycling

Lithium-ion cells gain increasingly interest in e-mobility applications. During charging and discharging, these batteries experience reversible thickness changes and inhomogeneous temperature distribution causing a space-dependent aging. Additionally, irreversible expansion and temperature driven defects occur during operation, such as gassing, particle cracking and SEI growth. These aging effects occur inhomogeneously. As

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New Insights using Isothermal Calorimetry and High Precision Cycling

In-operando isothermal calorimetry is a powerful tool for the study of active materials for energy storage. It has been used to study positive [1–3] and negative [4–7] electrode materials in half cells, as well as in symmetrical [4,5] and full cells.[8–15] Calorimetry can be used to quantify parasitic reactions enabling

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Modelling degradation of nickel-rich cathodes induced by phase transition

Nickel-rich positive electrodes (e.g., NMC811) are becoming popular thanks to their high energy density and good rate capability. However, their layered structures are prone to phase transitions to disordered spinel and rock-salt structures when a large fraction of lithium diffuses out, leading to capacity fade and electrode degradation. To model

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Modeling tailor-made 3D-structures of solid-state polymer cathodes

Solid electrolytes in lithium-ion batteries are promising regarding increased energy densities, fast charging properties and offer advantages in terms of safety due to the lower fire risk. However, besides the electrochemical properties of the materials used, the chemical processes are limited by the transport mechanism and transportation routes of charged

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Medium-Temperature Sodium-Iodine Battery System

A medium-temperature sodium-iodine battery system is presented. The rechargeable molten-sodium system works at approx. 100 °C with high efficiency, and potentially lower cost than existing high-temperature sodium-batteries (which are usually operating at a temperature of around 300 °C). Our battery system uses an aqueous iodine/iodide solution as catholyte and sodium-ion

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Mechanical recycling of production scraps from electrode manufacture

Economic and sustainable battery cell production is an indispensable requirement for electric vehicles to become an important part of the energy revolution. That is why the development of efficient recycling processes and novel recycling strategies is part of numerous research projects. The aim is to close the material cycle in

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LiIon Round Cell Alternatives for the automotive market

Currently most so called high end suppliers for round cells LiIon are not able to supply to the general market as they are focusing on the automotive market. When talking about the automotive market we are not only talking about demand for traction batteries, but also batteries for other functions

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Legal framework for sustainable battery-operated products

The analysis of battery-powered products from different industries shows how sustainable they are. The focus is not only on the batteries, but also on the charging infrastructure and the devices themselves. In addition to the customer’s point of view, in particular user behavior, the problem of manufacturers and government intervention

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Legal framework for sustainable battery-operated products

The analysis of battery-powered products from different industries shows how sustainable they are. The focus is not only on the batteries, but also on the charging infrastructure and the devices themselves. In addition to the customer’s point of view, in particular user behavior, the problem of manufacturers and government intervention

Learn more »

Laser sintering of ceramic-based solid-state battery materials

Solid-state batteries are a promising technology for high travelling ranges and safety in future electromobility. In a solid-state battery, separator and liquid electrolyte materials are combined to one solid-state electrolyte layer. Suitable ceramic materials are lithium lanthanum zirconate (LLZ) as electrolyte and lithium cobalt oxide (LCO) as cathode active material.

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Laser cutting of prelithiated graphite-silicon anodes

Prelithiation of electrodes is a new process step to avoid the nearly 20% lithium loss during the SEI formation. A thin lithium layer is applied to the electrode surface as a top coating via a physical vapor deposition process. This sacrificial lithium layer is designed to reduce the lithium loss

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Investigation of Tailored Carbons on the Solubility of Poly(3-vinyl-N-methylphenothiazine)-Based Electrodes for Organic Batteries

Nowadays, the state-of-the-art batteries, which are most commonly used in everyday devices, are based on lithium-ions. Due to many advantages of transition metal oxides, e.g. LiCo1/3Mn1/3Ni1/3O2, they are mainly utilized as active material in this type of battery application, however, they also suffer from significant drawbacks. These include the extraction

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Investigation of mechanical stress and lithium distribution

Previous to the integration of li-ion batteries in different applications, the battery cells have to be fully characterized to assess their ability to deliver the desired power and energy over the cell’s lifetime. On this account, accelerated aging tests are conducted, which use, among oth-ers, high charge and discharge currents.

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Investigation of lithium plating in commercial lithium-ion batteries

One of the challenges in the automotive industry is to provide fast charging of batteries. On the other hand, the safe operation of including low temperatures is indisputable. During cycling in such conditions, many undesirable phenomena may occur in the lithium-ion cell, such as low electrochemical performance of the system,

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Introducing the Synthetic Battery Modeling Toolchain

Future materials are frequently published in the scientific literature to be used as cathode or anode active materials, separators or electrolytes. The influence of these future materials on the actual cell performance can not be easily estimated from the material properties. However, since constructing a prototype is time- and money-intensive,

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Inductive drying of lithium-ion graphite anodes

Aiming an efficient lithium-ion battery production all process steps have to be enhanced in terms of quality and performance. In this regard, the drying process of electrodes holds great potential for improvement. The main disadvantage of state-of-the-art convective drying methods is their negative impact electrode properties on the cyclic stability

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