Booth Id:
EGSD002T
Category:
Energy: Sustainable Materials and Design
Year:
2021
Finalist Names:
Bayindir, Zeynep (School: TED Antalya Collage Foundation Private High School)
Kargi, Beliz (School: TED Antalya Collage Foundation Private High School)
Abstract:
With the increase in the use of lithium-ion batteries, there is also
increase in the waste of dead batteries which causes environmental
problems. The recycling of lithium-ion batteries carries special
importance for solving environmental problems and regaining of metals
from batteries. The aim of this project is to recycle Li and Co from the
cathode of waste lithium-ion batteries by a newly modified method
decreasing the use of LiOH in the process, and to synthesize LiCoO 2
using recycled Co and Li to be used to build a new cathode and also to
obtain a secondary lithium-ion battery with the graphite recovered from
anode of the waste batteries. The waste cathode material was scraped
firstly, then H 2 SO 4 and H 2 O 2 were added on it to dissolve Co and Li ions.
After that, some precipitation steps have been followed with the
supernatant to obtain Co and Li salts. Co and Li were obtained with
91,00% and 94,94% efficiencies respectively. The high-valued elements
were recycled from waste lithium-ion batteries successfully using lower
amount of LiOH which makes the process more feasible. A new lithium-
ion battery with a discharge efficiency of over 86% was obtained from
waste graphite. LiCoO 2 was synthesized succesfully for using it in
building a new cathode. In the advanced stages of this study, a new
cathode cell can be built using LiCoO 2 synthesized and analyzed for its
life cycle. Finally, with the anode made of recyled graphite and the
cathode newly built, a new battery can be obtained entirely from waste.
Awards Won:
Third Award of $1,000