Researchers at the University of Cambridge have developed innovative soft, stretchable “jelly batteries” with potential applications in wearable devices, soft robotics, and even brain implants for drug delivery or treating conditions like epilepsy. Inspired by electric eels, these jelly-like materials feature a layered structure, similar to sticky Lego, enabling them to deliver an electric current.

The jelly batteries, reported in the journal Science Advances, are made from hydrogels: 3D networks of polymers containing over 60% water. These polymers are held together by reversible interactions that control the jelly’s mechanical properties. The ability to precisely control these properties and mimic human tissue characteristics makes hydrogels ideal for soft robotics and bioelectronics. However, achieving both conductivity and stretchability in such materials has been challenging.

Researchers at the Qingdao Institute of Bioenergy and Bioprocess Technology (QIBEBT) have developed a groundbreaking method to recycle silicon from solar panels and repurpose it to create superior-performance lithium-ion batteries. This innovative approach is not only sustainable and cost-effective but also sets a new precedent for reusing solar panel components at the end of their life cycle.

The recent surge in solar panel installations marks a significant shift away from fossil fuels, contributing to a cleaner environment. However, it also foreshadows a looming waste problem, as these panels will reach the end of their operational life in about three decades, generating a massive amount of waste. Consequently, researchers worldwide are exploring viable roles for individual solar panel components. While metals like copper and silver will likely remain in high demand, repurposing abundant silicon has been a challenge—until now.