Flying at the highest altitude with a lithium-sulfur battery

Flying at the highest altitude with a lithium-sulfur battery

LG Chem has succeeded in flight testing of an unmanned vehicle at the highest altitude using the next generation battery for the first time in Korea.

In respect of this LG Chem announced that a high-altitude long-endurance solar-powered unmanned vehicle (EAV-3) developed by Korea Aerospace Research Institute has successfully finished flight testing in the environment of the stratosphere using its lithium-sulfur battery,.


EAV-3 is a small aircraft which can fly in the stratospheric altitude of 12km or higher for a long period of time using solar energy and batteries. It charges energy using a solar cell placed on the top of the wing. During the daytime, it flies utilizing a solar cell and battery power as a source of energy and during the night time, it utilizes battery power charged during the day time. It has wings of 20m long and a body of 9m long.


On 30 August, LG Chem loaded a lithium-sulfur battery on EAV-3 at the Aviation Center of Korea Aerospace Research Institute in Goheung and conducted flight testing approximately for 13 hours from 08:36AM to 09:47PM. LG Chem is the first company in Korea which conducted flight testing using a lithium-sulfur battery.


Especially, EAV-3 flew in the altitude of 22kms, which is unprecedented for a domestic unmanned aircraft, and achieved a new record of flying at the highest attitude in the stratosphere in Korea. Also, it flew for 7 hours out of a total of 13 flight hours with a stable output in the stratospheric altitude of 12-22km where a general aircraft cannot fly.

LG Chem

This fight testing is highly significant as it confirmed a stable charge/discharge function of a lithium-sulfur battery, the next generation battery in the extreme environment of the stratosphere with a low temperature of 70 degrees below zero and atmospheric pressure of 1/25 of one at ground level, which is close to a vacuum state.


A lithium-sulfur battery is one of the next generation batteries which will replace a lithium-ion battery, and its energy density is 1.5 times higher than the existing lithium-ion battery, which has a high energy density per weight, as it uses lightweight materials such as sulfur and carbon compounds for anode materials and lithium metal, etc. for cathode materials. The merit of the lithium-sulfur battery is that it is lighter and more competitive in terms of price compared to the existing lithium-ion battery as it does not use rare metals.


Also, it is considered as a key component that would determine the function of the future transportation such as electronic cars as well as long-endurance drones and personal aircraft, etc. and many countries in the world are competing intensely for the development of the same.

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Submitted by: Press release


Report by: OGP/Segun Cole , Please email us your industry related news for publication [email protected]

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