A Recovery Process of Active Cathode Paste from Spent Li-Ion Batteries

International Conference on Innovative Research - ICIR Euroinvent 2017

Toma, C.M.^1 ; Ghica, G.V.^1 ; Buzatu, M.^1 ; Petrescu, M.I.^1 ; Vasile, E.^1 ; Iacob, G.^1

University POLITEHNICA of Bucharest, 313 Splaiul Independentei Blvd, Bucharest

060042, Romania^1

关键词: Cleaning efficiency;    Electrode material;    Lithium cobalt oxides;    Recovery process;    Spent lithium-ion batteries;    Support substrate;    Ultrasonic vibration;    Ultrasonic washing;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/209/1/012034/pdf
DOI  :  10.1088/1757-899X/209/1/012034

来源: IOP

【 摘 要 】

In this work, the depleted active paste from spent lithium-ion batteries was separated from cathode by means of ultrasonic vibration. First the unit cells were discharged in brine at room temperature, for safety reasons. Then anode, separator, electrolyte and cathode were separated. Spent Li-Ion batteries were introduced into a washing container to separate electrode materials from their support substrate: active paste (lithium cobalt oxide - LiCoO2) from cathode (Al foil) and graphite from anode (Cu foil). The Al foil and Cu foil were also recovered. A cleaning efficiency of 91% was achieved using a solution of 1.5 M acetic acid after a 6 minute time of exposure into an ultrasonic washing container with a frequency and electric power of 50 kHz and 50 W, respectively. The XRD patterns and the morphology of LiCoO2powder were presented.