Zinc Microcapacitors Are the Best of Both Worlds

Sounds like a good match for sensor nodes where energy harvesting may be slow and consumption is intermittent. You don't need massive energy capacity, but you need good power density to support transmit bursts, and you need very high cycle durability.

Yeah, as long as self-discharge/leakage rates are acceptable, there are a lot of use cases for this middle ground tech.