Health & Environmental Research Online (HERO)


Print Feedback Export to File
8182115 
Meetings & Symposia 
Recycling of spent lithium-ion batteries used in electric vehicles by physical treatment and acid leaching 
Sohn, J; Kim, S; Yang, D; Kim, H; Lee, K 
2015 
International Symposium on East Asian Resources Recycling Technology 
13th International Symposium on East Asian Resources Recycling Technology, EARTH 2015 
807-811 
English 
Nowadays the high capacity lithium-ion battery is becoming the energy sources of HEV and EV. The sales of HEV and EV in Korea would be 60,000 units in 2015 and recently spent lithium ion batteries from HEV, start to occur. The contents and scope of this paper are demonstration on the pilot scale physical treatment process of the spent lithium-ion battery, developing recycling technology with the chemical leaching process on the crushed lithium-ion batteries, and the removal of impurities in leaching solution such as Fe and Al ions. The spent lithium-ion battery pack (227 kg) is made of 12 modules which are composed of 11 cells. This pack was dismantled manually in the dismantling line. After dismantling, cells are crushed and separated. The result by crushing and separation showed that over 95% of valuable metals such as Co, Ni, Mn were concentrated into fine powders with 1-3 mm particle size. On the other hand over 95% of aluminum foils are separated from fine powders with 65 mesh screen. In the reductive leaching experiment with H2O2 and H2SO4, leaching efficiency of valuable metals was almost 99 % Co, Mn, Ni and Li under the condition of 2M H2SO4, 5 vol. % H2O2, 60 °C, 300 rpm, 50 g/500 ml, and 2 h. After removing some impurities such as Cu, Al, and Fe the leaching solutions containing Co, Mn, Ni, and Li could be utilized for the source material of Li-ion battery. In this paper Taylor reactor was introduced to precipitate Fe and Al into hydroxides. 
Recycling of HEV battery; Spent lithium-ion battery; Sulfuric acid leaching