1. Nano-separator partially deslovate Li+ preventing solvent reduction. This enables metallic Li anode without dendrides  https://doi.org/10.1038/s41467-021-27841-0

2. Elastomer as a solid electrolyte https://www.nature.com/articles/s41586-021-04209-4

3. Multilayer solid electrolyte enable thousands of cycles https://www.nature.com/articles/s41586-021-03486-3