ELI5: It's cheaper/easier to dump chemicals in a battery and have them form the structure, than to carefully build and install the structure into the battery.

ELI5: It's cheaper/easier to dump chemicals in a battery and have them form the structure, than to carefully build and install the structure into the battery. Battery construction is process-intensive (lots of fiddly things you have to do carefully and in order), and everyone's looking for ways to cut that down.