New hybrid energy storage technology with 100 times faster charging than conventional batteries has been developed by a South Korean research team, led by Professor Kang Jeung-ku.
The new nanotube materials was set up to comprise the basis of hybrid full-cell capacitors with faster charging and higher energy and power densities.
The new hybrid energy storage technology has 275Wh/kg energy density, which is 1.5 times that of the lithium-ion battery, and 23kW/kg charging and output property, which is 100 times higher than that of the lithium-ion battery.
The design combines the high energy storage density of lithium-ion batteries and high charging speed and output of supercapacitors, to meet the expectation of mobile devices and electric vehicles.
Activated carbon’s using as cathode eventually brings about low specific capacity in the devices. Additionally, tin metal’s using as anode results in short cycle life and poor rate capability.
To tackle these issues, the team developed nitrogen-rich nanotubes with fine mesoporous channels for positive and negative ions. A material can deal with high-capacity energy storage density and superior energy input and output properties.
The team also combined it with the different energy storage mechanisms of lithium-ion batteries and supercapacitors.
The Ministry of Science, ICT and Future Planning said, “This means that the new technology can charge 200 Wh/kg of energy in about 30 seconds, and reach 130 Wh/kg of energy density in 20 seconds of maximum output.”
Hybrid Interface Materials, one of the science ministry’s research arms, supported the research through its global frontier program. The results were published in international science journal Advanced Energy Materials on Sept. 23, the ministry said.