Recently, fudan university research team in high performance fiber battery and battery fabric research new breakthrough: through the design of pore structure fiber electrode, electrode and polymer gel electrolyte effective composite, team not only solved the polymer gel electrolyte and electrode interface stability problem, also developed fiber battery continuous construction method, realize the high safety, high energy storage performance of fiber battery scale preparation. The relevant research results were published in Nature.
After years of exploration, the team of Fudan University has successively solved the two major problems of “designing fiber structure to obtain soft lithium ion battery” and “preparing high energy density fiber lithium ion battery”; “realizing high safety fiber lithium ion battery” is the “last kilometer” of this topic. Research team leader, member of Chinese Academy of Sciences Peng Huisheng said, due to the fiber battery fabric and human body close fit, must with high security of polymer gel electrolyte instead of flammable organic electrolyte of leakage, and based on polymer gel electrolyte fiber battery to improve energy storage performance, must solve the polymer gel electrolyte and fiber electrode interface unstable this problem.

Team eventually from ivy and plant vines tightly winding inspired by the natural phenomenon, study the mystery, designed a multi-level network channel and orientation of fiber electrode, and develop monomer solution to penetrate into the fiber electrode pore structure, monomer polymerization reaction after polymer gel electrolyte, and fiber electrode form close stable interface, thus realizes the high security and high energy storage performance.
On this basis, the team developed a continuous preparation method based on polymer gel electrolyte fiber battery, which realized the preparation of fiber lithium ion battery of thousands of meters. Its energy density reaches 128 watt-hours / kg, which can effectively power high-power electrical appliances such as uav, and has excellent deformation resistance.
Peng Huisheng said, through the independent design key equipment, the team established with active slurry coating, polymer isolation membrane coating, fiber spiral winding, gel electrolyte composite and polymer melt encapsulation as the core steps of fiber battery pilot production line, realize the capacity of 300 watts per hour, equivalent to every hour production of battery can be charged for 20 mobile phone at the same time.
At present, the team has used industrial weaving methods to prepare a large area of fiber battery fabric. Under relevant industrial standards, battery fabric has no leakage or fire after high current charge and discharge, overvoltage charging and undervoltage discharge and high temperature storage, showing good safety and stability; Battery fabric can still safely and stably supply the electrical appliances under high and low temperature, vacuum environment and external damage.
“This fiber battery can be used in fire fighting and disaster relief, polar scientific research, aerospace and other important fields, and more application scenarios need to be jointly explored by all parties.”Said Peng Huisheng.