Future smart homes could be powered with electronics built on stones

https://techxplore.com/news/2022-07-future-smart-homes-powered-electronics.html

"To form the microsupercapacitor, the researchers deposited iron oxide onto one of the electrodes to form a cathode, and manganese oxide on the other to form an anode. The electrolyte layer connecting the electrodes was made from a lithium perchlorate and polymer solution. In tests, the device maintained a high energy storage capacity even after 4,000 charge-discharge cycles. When multiple microenergy devices were strung together in a three-by-three array, enough energy was stored to light an LED"

Related: KiloVault Introduces DIY All-in-one Solar Ready Energy Storage System for Off-Grid Living
https://www.altenergymag.com/news/2023/08/21/kilovault-introduces-diy-all-in-one-solar-ready-energy-storage-system-for-off-grid-living/39990/