To fabricate roll-up displays and wearable devices, the power source that supplies them must also become more flexible. The major challenge of developing a truly bendable power source has been the shortage of materials that are both highly flexible and have superior electronic conductivity. Polymers are typically used, but they are susceptible to degradation at relatively low temperatures.
Researchers have now developed a graphene-based hybrid electrode producing a flexible lithium rechargeable battery. The cathode material, in this case V2O5, is grown on graphene paper using pulsed laser deposition and graphene paper coated in lithium is used as the anode. The resultant battery is lightweight and flexible enough to be twisted or rolled.
The performance of the new battery appears to be promising. The electrode was shown to exhibit significantly improved electrochemical performance in almost all aspects of electrochemical properties, such as higher energy density, power density and better cycle life, compared with non-flexible conventional electrodes, according to the authors.
(Source: Bendy batteries a step closer)
Flexible energy storage devices based on graphene paper
Energy Environ. Sci., 2011, DOI: 10.1039/c0ee00640h
Gopal R. Rao, Ph.D.
Web Science Editor
Materials Research Society (MRS)