On February 19th, it was learned from Tianjin University that Professor Xu Yunhua's team, in collaboration with Professor Huang Fei's team from South China University of Technology and other institutions, has successfully developed a novel organic cathode material. This material overcomes key bottlenecks in traditional organic lithium-ion batteries, such as low capacity and difficulty in practical application, making it safer, more resistant to freezing, and more heat-resistant. The relevant research results were published in the international journal *Nature* on February 19th (Beijing time).
An organic pouch battery with an energy density exceeding 250 Wh/kg. Image source: Tianjin University
Organic lithium-ion battery electrode materials are widely available, and their molecules can be flexibly designed and are inherently flexible. However, these materials have always struggled to balance high capacity and high load, resulting in batteries that often have insufficient capacity or charge slowly.
In this research, the team successfully developed an organic cathode material that combines excellent electronic conductivity, rapid lithium-ion transport capabilities, and high energy storage capacity. Based on this material, the team fabricated an organic pouch battery with an energy density exceeding 250 Wh/kg.
This battery exhibits exceptional temperature adaptability, operating normally in extreme temperatures ranging from -70°C to 80°C. It also demonstrates good flexibility and safety, with its electrodes remaining intact after bending, stretching, and even external compression, without any reduction in battery capacity.
The team's Ah-level pouch battery successfully passed the rigorous nail penetration safety test, remaining undeformed during charging and discharging, thus verifying its safety. This marks a crucial step forward for organic batteries from the laboratory to practical applications.
