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Korean scientists develop new water-based battery, fully charged in half a minute
March 09, 2018

A research team from South Korea has developed a new type of hybrid energy storage battery. Although it replaces traditional flammable organic solvents with water-based electrolytes, its power density has increased by a factor of 100, and it is safer and more stable than lithium-ion batteries. The internal booster is fully charged.

The concept of switching to an aqueous electrolyte for battery safety is not new, but although this design is less flammable and much cheaper than lithium batteries, it also brings problems such as reduced life and low power consumption. It's like a pig-like teammate.

However, research teams from the Korea Institute of Science and Technology (KAIST) and Gangwon University in South Korea have developed breakthrough equipment. According to "Interesting Engineering", this is the first time in history that scientists have effectively solved the charging speed and high speed of water-containing capacitor devices. Limitations on energy density, in addition, this device can maintain high stability while meeting performance goals.

Basically, the team designed a new cathode-anode structure through a series of different materials. The anode is made of a graphene polymer with a network structure and has a high surface area to store more energy. The cathode is made of graphene embedded in graphene. The composition of nickel oxide nanoparticles, due to the high energy density, minimizes the energy loss between the two electrodes, and after more than 100,000 redox cycles, its capacitance remains at about 100%.

The power density of the new device is 100 times higher than that of similar water-based battery designs, and low-power systems such as traditional USB chargers can charge power from zero to full in 20 to 30 seconds.

Compared with lithium batteries, water-based batteries are more environmentally friendly and easy to manufacture. If coupled with the advantages of high capacitance, high stability, and fast charging, the road to commercialization will be smoother. "Interesting Engineering" believes that related industries are bound to respond to this innovative development of the team. The study was published in the journal Advanced Energy Materials.