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

Solid-state batteries are intensively studied because they promise safer electrochemical storage with larger volumetric and gravimetric energy densities. One of the main scientific challenges in the cycling performance is the limited electrolyte stability, which leads to parasitic reactions that may lead to volumetric changes, contact loss, less conductive interphases and irreversible capacity...

The discovery of the lithium superionic conductor Li10GeP2S12 (LGPS) has led to significant research activity on solid electrolytes for high-performance and safe solid-state batteries. LGPS exhibits a remarkably high room-temperature Li-ion conductivity of 12 mS/cm, comparable to that of the liquid electrolytes used in current Li-ion batteries. Here, we predict that nanosizing of LGPS can be...

Lithium-ion conducting argyrodite materials, Li6PS5X (X=Cl/Br/I), are among the most well-studied inorganic solid electrolyte due to their large ionic conductivity. One of the major remaining concerns with the use of these materials in solid-state battery is limited information on their actual stability window. This work presents a systematic study to understand the influence of cationic /...

Design of Lithium ion conducting porous hybrid materials for the development of solid Li-battery electrolytes
Koceila MAOUACINE,Virginie HORNEBECQ,Chrystelle LEBOUIN,Luca PASQUINI
Aix-Marseille Université,France

Solid polymer electrolytes based on poly(ethylene oxid), and lithium-salt complexes are one of the promising materials for developing safe,and durable all-solid-state lithium...

The presence of grain boundaries in solid electrolytes has shown to reduce ionic conductivities. The resistive properties of grain boundaries can be separated into two contributions: an increased potential energy barrier at the grain boundary core as a result of the rearrangement of ions from the bulk crystal structure; and the formation of space-charge regions. Space-charge regions are areas...

In recent years, ternary halides Li3MX6 (M = Y, Er, In; X = Cl, Br, I) have garnered attention as solid-state battery material due to their high electrochemical stabilities and room-temperature conductivities. In this material class, the influences of isovalent or aliovalent substitutions are rarely studied despite being a common tool for correlating structure and transport properties. This...

All solid-state batteries (ASSBs) are anticipated to be the next generation lithium ion batteries with their wider operating temperature range, higher energy density, and increase in safety performance compared to conventional liquid electrolyte-based batteries [1,2]. These advantages make them potential candidates for electric vehicles, but many processing and performance challenges must be...

The replacement of the presently used liquid electrolytes by a non-flammable solid electrolyte is an important avenue to create safer batteries. The Natrium Superionic CONductor (NaSiCON) Na1+xZr2SixP3-xO12 (0 < x < 3) that displays high bulk ionic conductivity and good stability towards other NaSiCON-based electrodes is a good solid electrolyte in NaSiCON-based batteries. Here, we analyze the...

The critical role of solid electrolytes in the development and improvement of all-solid-state batteries is apparent, not only regarding lithium but also sodium based secondary cells.[1] A recently reported promising crystalline solid Na-ion conductor candidate is Na11Sn2PS12 with high conductivity in the range of 1.4 - 3.7 mS/cm mediated by intrinsic vacant Na sites.[2,3] Herein, we monitor...

Solid-state lithium-sulfur (Li-S) batteries are promising candidates for next-generation energy storage devices with a high theoretical capacity of sulfur. However, there are still challenges to overcome for being competitive with ubiquitous Li-ion batteries. One of the significant challenges is to maintain sufficient charge carrier transport in the composite cathode. As active material sulfur...

Metallic lithium electrodes hold promise for increasing the energy density of Li-ion batteries, and when used in conjunction with solid electrolytes, adverse safety implications associated with dendrite formation in organic liquid electrolytes can be overcome. To better understand the stability of solid electrolytes when in contact with lithium and the reactions that occur, requires...

Thin film solid state batteries can provide a compact and environmentally friendly solution for powering future micro-devices. While few commercial solutions exist, there is a major interest in providing improved performances and capabilities by developing appropriate electrodes with high capacity, stability and fast performance, and electrolytes with a low ionic resistance. Here we present...

Lithium-metal solid‐state batteries based on solid polymer electrolytes are at the forefront of the candidates to face energy density and safety issues encountered by conventional Li-ion batteries. Dry solid electrolytes have been developed for several decades [1] but still face several challenges to be compatible at high voltages [2] and versus Li metal [3] at the same time. The combination...

To keep pace with the ever-increasing demands for high energy density, low cost, and long cycle life of rechargeable batteries, advanced battery designs are needed. The greatest improvement over conventional batteries is expected to come from the use of metallic lithium as an anode. However, non-uniform electroplating of lithium metal results in the formation of dendrites, which greatly...

Solid-state electrolytes (SSEs) are promising candidates for resolving the intrinsic limitations of the organic liquid electrolyte currently employed in Li-ion batteries. Complex hydrides (e.g. LiBH4) are suggested as solid-state electrolytes. Among the different polymorphs of LiBH4, only the hexagonal phase, which is stable at temperatures above 110°C, has a remarkable high ionic conductivity...

The development of commercial solid-state batteries is up to date hindered by the individual limitations of inorganic and organic solid electrolytes, motivating hybrid concepts. However, room temperature performance of hybrid solid electrolyte is limited by the sluggish interfacial Li-ion transport between the organic and inorganic electrolyte phases. This challenge is further complicated by...

Solid state batteries (SSBs) are the most promising candidates to overcome safety and energy density drawbacks of conventional Li-ion batteries. Polyethylene(oxide) (PEO) mixed with lithium conductive salts is an excellent choice amongst the available solid electrolytes due to the processing into thin electrolyte layers with improved electrode/electrolyte interfacial contact. However, the...

Lithium borohydride solid-state electrolytes (SSEs) have recently drawn considerable scientific interests owing to the fast Li-ion conduction in their high-temperature hexagonal phase (h-LiBH4), which can be preserved down to room temperature (RT) by partially substituting for [BH4]- with halides such as I-, Cl- and Br-, resulting in RT conductivities in the order of 10-4 S cm-1. Further...