Host: Japan Society of Material Cycles and Waste Management
Name : The 31st Annual Conference of Japan Society of Material Cycles and Waste Management
Number : 31
Location : [in Japanese]
Date : September 16, 2020 - September 18, 2020
The fluorine content in a Lithium-Ion Battery (LIB) and the fluorine fixation reaction with calcium carbonate were examined for the purpose of safe treatment of fluorine-containing gas generated by calcination of spent LIBs. In the water leaching experiment of LIB components, the amount of leached fluorine was measured using a F- selective electrode, and it was found that water-insoluble fluorine was converted to soluble species by heat treatment. Moreover, it was shown that the cathode material contained more fluorine than the anode material by the repetitive leaching. In order to fix HF generated by thermal decomposition of PVDF used as the binder resin for the cathode material of LIBs, a fluorine fixation experiment with calcium carbonate was conducted. As for the influence of the reaction temperature, it was found that calcium fluoride was formed avobe 400 ℃ under inert atmosphere. A quantitative analysis of XRD data employing internal standard method revealed that the maximum fluorine fixation ratio of 99 % was achieved.
