South Korea has developed high-performance anode binder materials for lithium batteries

by:CTECHi     2021-07-05

The Korean Research Foundation announced that the institute has jointly developed a new type of binder anode material with high voltage and high capacity in cooperation with Chungnam University and Gimuk University of Technology, which has greatly increased the energy density of secondary lithium batteries. The research results were published in the international academic journal Advanced Functional Materials.

Lithium cobalt oxide (LiCoO2) and nickel cobalt manganese (NCM) currently in use have limited capacity, and a larger capacity anode material is required. As a new generation of anode material, lithium-rich manganese oxide has attracted much attention. It has twice the energy capacity of lithium cobalt oxide oxide, but high capacity can only be obtained by increasing the charging voltage above 4.4V. However, in this case, the secondary battery will generate heat, which will weaken the viscosity of the adhesive and cause problems such as weakened battery performance.

South Korea is committed to the development of high-energy-density secondary batteries. The anode material developed by the research group is a binder material that forms a protective film on the surface of the electrode under the conditions of a high voltage of 4.7V and a high temperature of 55 degrees to keep the interface stable. It does not require additional electrolyte additives and can also maintain a stable viscosity. The lithium cobalt oxide used has more than twice the capacity and more stable charge and discharge performance. The research team said that this technology can further promote the development of secondary batteries.

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