Like asymmetric hybrids, battery-type hybrids couple two different electrodes;
however, battery-type hybrids are unique in coupling a supercapacitor electrode with a
battery electrode. This specialized configuration reflects the demand for higher energy
supercapacitors and higher power batteries, combining the energy characteristics of batteries
with the power, cycle life, and recharging times of supercapacitors. Research has focused
primarily on using nickel hydroxide, lead dioxide, and LTO (Li4Ti5O12) as one electrode and
activated carbon as the other [34-38]. Although there is less experimental data on battery-
18
type hybrids than on other types of supercapacitors, the data that is available suggests that
these hybrids may be able to bridge the gap between supercapacitors and batteries. Despite
the promising results, the general consensus is that more research will be necessary to
determine the full potential of battery-type hybrids