Chinese researchers have developed an innovative organic cathode material that enables batteries to perform efficiently and stably across extreme temperatures, from below freezing to 80 degrees Celsius. The material addresses cost and safety issues of conventional lithium-ion batteries and holds potential for wearable devices. The study, led by Xu Yunhua from Tianjin University and Huang Fei from South China University of Technology, was published in Nature on February 18.
Chinese researchers have made a breakthrough in organic batteries, using poly(benzodifurandione) (PBFDO) as the organic cathode material. This material enables efficient and stable performance across an extreme temperature range, from below freezing to 80 degrees Celsius (176 degrees Fahrenheit).
Conventional lithium-ion batteries typically use inorganic minerals such as lithium cobalt oxide or lithium iron phosphate as cathode materials. Their production costs depend on available mineral resources, and they pose safety risks when colliding or overheating. To address these challenges, researchers have explored flexible organic materials as alternatives. These materials are inherently stable, reducing the risk of combustion or explosion, and they are easier to synthesise and recycle. Their resistance to bending also makes them promising candidates for wearable devices.
However, organic materials generally suffer from low electrical conductivity, often requiring large amounts of conductive additives. Small organic molecules also tend to dissolve in the electrolyte, leading to shorter battery life. According to a report published by the China Science Daily last week, Chinese researchers have taken a crucial step towards bringing organic batteries from the laboratory into practical use.
The research was led by Xu Yunhua from Tianjin University and Huang Fei from South China University of Technology. Their findings were published in Nature on February 18. This development could potentially leap organic batteries from lab to reality, particularly for wearable electronics.
