National Research Foundation of Korea has announced on April 1st that Prof. Hoseok PARK developed a lithium-sulfur battery with high capacity and long lifespan using the spray freeze method.
Lithium-sulfur battery is receiving spotlight due to the increasing interest in supplying electric cars and storage systems for renewable energy.
Theoretically, the lithium-sulfur battery can store fivefold of energy in comparison to the previous forms of batteries. Sulfur is also relatively inexpensive.
However, there are problems to overcome. Sulfur has low electric conductivity and it melts into an electrolyte causing serious damage to the battery’s lifespan and performance.
The research team managed to control the structure of the interior by forming a round-shaped particle by combining sulfur and graphene. Graphene is used to supplement the electric conductivity.
The research team said that SF (Spray Frozen) method was the core technology for the development. It is a method of drying by spraying nano-particles. The SF method enables combination of nano-materials into a micro ball shape. It can even control the size, density and the interior structure of the particle. Spray method is also eco-friendly because it uses water as a solvent.
The thesis was posted on the March 14th issue of the world-renowned journal “ACS Nano”.
Original Article (Korean): https://www.yna.co.kr/view/AKR20190329157800063?input=1195m
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