Researchers around the world are working on new materials to improve the performance and life of lithium batteries. Now a team of Japanese researchers has come up with a new design with new materials that can hold charge more efficiently and also extend battery life.
The batteries used in smartphones do not work like the first day after a few years and the battery is destroyed. There are many moving parts inside the battery that play a role in reducing this performance. Researchers at the Japanese Institute of Advanced Science and Technology are now working on a material called “binder” to solve this problem.
This material plays an important role in maintaining the graphite anode of the battery. Polyvinylidene fluoride (PVDF) binders are now used for lithium batteries, but researchers are looking for alternatives and have now introduced a new high-performance binder.
This new binder is made of a “heterogeneous polymer” or copolymer polymer called “bis-imino-acenaphthenequinone-paraphenylene” or BP and tested. Studies have shown that this material increases battery life and the battery capacity decreases very little after several charging periods.
Value author New research, “Matsumi Norwichi” reported much higher performance of this binder than PVDF binders:
“A half-cell using PVDF as a binder retained only 65% of its original capacity after 500 charge and discharge cycles. “But when BP copolymer binder was used, 95% of the battery capacity was maintained after 1,700 charge and discharge cycles.”
According to the researchers, such performance results in better mechanical stability and greater adhesion to the anode as well as current collector. BP is more conductive and also thinner than the PVDF used today. In addition to these features, it does not react easily with the electrolyte, which increases battery life.
In microscopic images of BP and PVDF binders, only small cracks are seen in the first case after 1700 cycles, while PVDF binders leave large cracks only after 500 cycles.
Despite such high performance, this design still needs more work and it takes time to enter the real world and commercialize it. However, it may one day increase the battery life of smartphones as well as electric cars.