Researchers from Tsinghua Shenzhen International Graduate School and Tianjin University in China have developed an innovative mobile phone battery that can operate at temperatures as low as -30°C for over 4,500 hours. This breakthrough, published in the journal Nature, features a design that significantly improves the stability and longevity of lithium metal batteries.
The study highlights the creation of a ductile solid electrolyte interface that prevents crack formation during charging and discharging, even under extreme conditions. This new layer resiliently bonds to the anode, preventing cell deterioration in frigid climates. Materials such as silver sulfide and silver fluoride are used to optimize the surface ductility, ensuring better absorption of mechanical stress during intensive use.
Laboratory experiments showed that, under severe conditions, these batteries can exceed 7,000 life cycles. They are not yet available on the market, as they are still in the experimental phase. However, researchers plan to assess the feasibility of large-scale production and explore more economical alternatives to replicate this innovative ductility.
