Published in the monthly magazine of the Korea Battery Industry Association in April 2022 (PhD.
Taek-Gyoung Kim)
Future all-solid battery, carbon nano material dispersion technology
(Some contents of the monthly magazine)
Because of the solidified particles that make up the all-solid-state battery, the interface between the
particles is required to improve performance.
Stability is very important. This is the biggest challenge in the process of putting an all-solid-state
battery into practical use and must be solved.
Among them, low interfacial stability between the solid electrolyte and the carbon conductive material is
included. Solid electrolyte-carbon conductive material
The interfacial resistance increases due to interfacial side reactions. As a result, the movement of lithium
ions and electrons is hindered, resulting in overvoltage of charging.
Occasionally, battery deterioration is accelerated.
The exact cause has not been elucidated. Based on the experimental evidence, carbon nanomaterials with high
crystallinity are used as conductive materials.
By applying it, the electrochemical side reaction at the interface is reduced, and the formation of the
insulating material formed by the side reaction is reduced.
can be reduced.
In addition, improved electrical conductivity can be ensured, and thus the performance of the battery can be
significantly improved. In that respect, one-dimensional carbon nanotubes (CNTs), known as 'new materials of
dreams', are suitable materials.
It is considered.
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