NanoEnergy

Researchers have uncovered the mechanical properties of the nanoscale "thorns" that grow inside lithium batteries, which can cause them to short circuit or even combust. This paves the way to stop these growths forming, preserving battery power.

Harnessing a principle known as triboelectrification, researchers have worked out the optimal way to generate an electrical charge in a relatively simple way. The breakthrough could provide a battery-free way to power wearables and other devices.

The NanoTritium betavoltaic power source from City Labs is a thumb-sized battery that draws on the energy released from its radioactive element to provide continuous nanoWatt power for over 20 years.