Can a safe, gel-like "semi-solid" battery that combines the best of both "liquid" and "all-solid" be a "realistic optimal solution"?

 

https://www.youtube.com/watch?v=tKx928nOnaA

https://www.facebook.com/masahiro.ishizuka.54/videos/1297408187715053

https://www.linkedin.com/embed/feed/update/urn:li:ugcPost:7009075483208273921

https://video.fc2.com/content/20221215DhMwYrAZ