EUROPEAN CONGRESS AND EXHIBITION ON ADVANCED MATERIALS AND PROCESSES - EUROMAT 2021

Electrochemical deposition is a particularly elegant and effective route for the preparation of thin and conformal solid polymer electrolyte layers. We reported the synthesis of Li-ion conducting solid polymer electrolytes for use in lithium-ion microbatteries based on titania nanotubes. The cyclability, energy and power density are among the best in literature. Furthermore, we studied the...

In the last years, enzymatic fuel cells (EFCs) were developed as an alternative to classical fuel cells and recently promising performance improvements were reported. EFCs work mostly with liquid electrolytes, but for the miniaturization of the devices, an ion exchange membrane separator is necessary. The membrane should be biocompatible, not alter the enzymatic activity, and its swelling...

The development of energy storage technologies, such as rechargeable batteries, is crucial for the transition to a sustainable energy supply. Lithium-ion batteries have already proven to be an effective means of energy storage, which is illustrated by their wide application ranging from mobile phones to laptops and electric vehicles. Unfortunately, Li-ion batteries suffer from safety issues...

Solid-state electrolytes (SSEs) are promising candidates for resolving the intrinsic limitations of the organic liquid electrolyte currently employed in Li-ion batteries. Nevertheless, an SSE must fulfil several requirements to be employed in an all-solid state battery (SSB), such a high ionic conductivity. Complex hydrides (e.g. LiBH4) are suggested as solid-state electrolytes. Among the...

Li4+xTi5O12 (LTO) is a well-known anode active material with promising properties for its use in lithium-ion batteries. LTO can accommodate up to 3 excessive Li+ ions (and e− electrons) in its crystal structure with marginal volume changes and is, therefore, known as a so-called zero-strain material. During Li+ insertion, the Li-ions change their preference for the available crystallographic...

Na3PS4 is a promising electrolyte for future sodium all-solid state batteries. Its readily available components make it a compelling and more sustainable alternative to recent Li-technologies. At ambient temperature, the ionic conductivity in its cubic crystal structure is in the order of 10−4 cm−1 [1]. Even though several studies focused on explaining the dynamic properties of cubic Na3PS4,...

Solid electrolytes are a key component in enabling new technological advances for rechargeable batteries by mitigating many of the challenges associated with the use of liquid organic electrolytes. One of the key properties of solid electrolytes is their ability to transport ions between anode and cathode. This ion migration is usually characterized by measuring the ionic conductivity by means...

High-entropy oxides (HEOx) are novel materials, which have great application potential due to their unique features coming from entropic stabilization: enhanced structural stability, significantly increased solubility limits and, most of all, the presence of synergistic effects. Although known only since 2015, they have already been proven to exhibit numerous extraordinary properties yielding...

As the energy production becomes less of a bottleneck, its storage is still not fully understood. For example the changes occurring at the molecular level are challenging to grasp by integral techniques of pure electrochemistry, therefore the use of operando spectroelectrochemistry becomes an asset.

Raman spectroelectrochemistry for example provides information about changes in the...

Solid-state electrolytes potentially offer an increased energy density and safety for Li-ion batteries as required for the large-scale production of electrical vehicles. Recently, halide solid electrolytes with formula Li3M(III)X6 (M=In,Sc, lanthanides, X=Cl,Br,I) have come to the attention of many researchers, due to their stability against high potential cathodes and high ionic conductivity....

Cubic Li7La3Zr2O12 (LLZO) garnets have attracted lots of attention in previous years as they show promising properties for Solid-state Li batteries (SSLB) as solid electrolyte including a high electrochemical stability of up to 6 V and a high ionic conductivity in the range of 1 mS cm-1.1 Despite of these favorable prerequisites, its current use in such devices is limited as high temperature...

Solid-state electrolytes (SSEs) for battery systems is a fast developing field. Here, we focus on a new class of solid-state electrolytes based on metal organic frameworks (MOFs). In this study MIL-121 (Al centres linked by pyromellitic acid) was synthesized by a hydrothermal route [1], post synthetically modified with lithium acetate and sodium acetate and subsequently soaked with...

It is documented in the literature that hexagonal rare earth manganites can reversibly incorporate significant amount of interstitial oxygen at temperatures in the range of 200-300 °C. Despite that normally the process occurs only in O2 atmosphere, proper manipulation of the composition can enable the materials to absorb oxygen even from air: as reported, even small substitution of Y with Pr...