Dry Processing Technique for High-Energy Density Lithium Batteries

Using no solvents, dry processing technique (DPT), especially for binder fibrillation is drawing more research attention due to its feasibility in fabricating thick electrodes as well as ultra-thin solid electrolyte (SE) films. However, DPT electrodes and SE films are still facing multiple challenges including processing sensitivity (to temperature, humidity, as well as particle size and mechanical properties of the electrode/electrolyte materials, to name but a few), poor compatibility with lithium metal anode, as well as hindered ion transportation, which are restricting their commercial applications. Focus on the charge percolating of the high loading DPT electrodes/SE films and their stability toward metal Li, the mainstream commercial electrode characteristics including area loading and porosity are begun with, then the latest advances on DPT is reviewed from the electrode and SE aspect, respectively. It is found that although DPT achieved great success in academic study, there's still a large space to be explored before it can energize the battery industry.