School of Chemical Engineering & Technology, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China.
School of Chemical Engineering & Technology, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China; Advanced Analysis and Computation Center, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China.
Waste Manag. 2021 May 1;126:517-526. doi: 10.1016/j.wasman.2021.03.052. Epub 2021 Apr 8.
The efficient recycling of spent anode material (SAM) from spent lithium-ion batteries (LIBs) is generally critical in terms of electronic waste recyclingas well as increasing resource shortage and environmental problems. This research reported a novel and green method to recycle lithium, copper foil, and graphite from SAM by water leaching treatment. The results indicated that 100% of graphite was exfoliated from the anode material and 92.82% leaching efficiency of lithium was obtained under the optimal conditions of 80 °C, 60 g/L, 300 rpm, and 60 min, respectively. This finding revealed that the SAM got a full liberation characteristic due to the removal of binder, which produced an ideal leaching lithium efficiency rivaling the acids' performance. The mechanism of the liberation of SAM and lithium leaching is presented based on the analysis of results. The graphite was purified and recovered after water leaching treatment. Besides, lithium was recovered in the form of lithium carbonate (LiCO) and the copper foil was recovered in a sheet. This study endeavors to develop an economical and environmentally feasible plan to recycle graphite, copper, and lithium from SAM.
从废旧锂离子电池（LIB）中高效回收废阳极材料（SAM）对于电子废物回收以及增加资源短缺和环境问题至关重要。本研究报道了一种从 SAM 中通过水浸处理回收锂、铜箔和石墨的新颖且绿色的方法。结果表明，在 80°C、60g/L、300rpm 和 60min 的最佳条件下，石墨从阳极材料中完全剥离，锂的浸出率达到 92.82%。这一发现表明，由于去除了粘结剂，SAM 获得了完全的解放特性，从而产生了与酸相当的理想浸出锂效率。根据结果分析提出了 SAM 释放和锂浸出的机理。石墨经过水浸处理后进行纯化和回收。此外，锂以碳酸锂（LiCO）的形式回收，铜箔以片状回收。本研究旨在开发一种经济且环境可行的方案，从 SAM 中回收石墨、铜和锂。
