Overcoming challenges in all-solid-state batteries

All-solid-state batteries have the potential to replace commercial metal-ion batteries due to their higher energy densities. Additionally, the flammable liquid electrolytes used in metal-ion batteries pose a safety concern as we move toward an electric-powered society. By replacing the liquid electrolyte with a solid in solid-state batteries, safety is improved as well as yielding higher performance. There are further advantages for moving toward solid electrolytes such as battery operation at a wide temperature range and bipolar electrode configurations – further optimizing energy density and limited space. However, multiple challenges persist that prohibit market-acceptance of all-solid-state batteries, for instance: 1) solid electrolytes often have lower ionic conductivity, 2) high interfacial resistance occurs, and 3) continuous volume changes of the cathode and anode mechanical stresses that can cause rapid failure. Additionally, there are still opportunities in uncovering battery chemistries currently unknown by developing new battery materials, for instance in multivalent metals such as magnesium and calcium.

This collection will bring together the latest developments in developing and understanding all-solid-state batteries to help bring these to adoption. Topics of interest include:

• Development and analysis of battery materials and phenomena leading to enhanced performance properties
• Characterisation and mechanistic studies unveiling a better understanding of the operation and transport mechanisms
• Demonstrations of new battery assembly and processing methods
• Evaluations of the mechanics of solid-state batteries and solid-state battery materials
• Theoretical studies and simulations of devices and new candidate materials
• Development of new chemistries for all-solid-state batteries
• Demonstrations and discussions towards industry-relevant real-world use

We welcome the submission of any paper related to all-solid-state batteries. All submissions will be subject to the same review process and editorial standards as regular Communications Materials Articles.