文献类型：期刊文献

英文题名：Recovery of cathode materials and Al from spent lithium-ion batteries by cleaning

作者：He, Li-Po[1];Sun, Shu-Ying[1];Song, Xing-Fu[1];Yu, Jian-Guo[1]

机构：[1]E China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake R, Shanghai 200237, Peoples R China

年份：2015

卷号：46

起止页码：523

外文期刊名：WASTE MANAGEMENT

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000366226300058)】；

基金：This work was financially supported by the National Natural Science Foundation of China (U1407120).

语种：英文

外文关键词：Lithium-ion batteries; Recycling; Ultrasonic cleaning; Cathode materials

摘要：Cathode materials are difficult to separate from Al-foil substrates during the recycling of spent lithiumion batteries (LIBs), because of the strong bonding force present. In this study, ultrasonic cleaning was used to separate and recycle these cathode materials. The mechanism of separation was ascribed to the dissolution of polyvinylidene fluoride (PVDF) and the cavitation caused by ultrasound. Based on this mechanism, the key parameters affecting the peel-off efficiency of cathode materials from Al foil was identified as solvent nature, temperature, ultrasonic power, and ultrasonic time. The peel-off efficiency of cathode materials achieved, similar to 99% under the optimized conditions of N-methyl-2-pyrrolidone (NMP) cleaning fluid, 70 degrees C process temperature, 240 W ultrasonic power, and 90 mm of ultrasonication. The cathode materials separated from Al foil displayed a low agglomeration degree, which is beneficial to the subsequent leaching process. Finally, a new, environmentally-sound process was proposed to efficiently recycle cathode materials and Al from spent LIBs, consisting of manual dismantling, ultrasonic cleaning, and picking. (C) 2015 Elsevier Ltd. All rights reserved.