摘要
采用X射线衍射仪分析了失效锂离子电池焙烧产物的物相组成,并由扫描电子显微镜(SEM)及能谱仪采用面扫描的方法,分析了焙烧产物中不同颗粒的形貌和元素成分。失效锂离子电池焙烧后,其中的LiCoO2可转变为Co,CoO,Co3O4等,含Co,Cu和Al元素的物质之间未发生明显的化学反应。在含亚硫酸钠的硫酸浸出液中,焙烧产物中锂可被全部浸出,钴的浸出率达到75%,而铜的浸出率小于23%。为了提高铜、钴元素的浸出率,在用亚硫酸钠与硫酸浸出钴之前,应先将铜脱除。
Phase composition analysis of the roasted residue of spent lithium-ion batteries （LiBs） was carried out by X-ray diffraction （XRD） , and its morphological characterizations and elemental distributions were further studied by using scanning electron microscopy （SEN） and X-ray mapping analysis via energy-dispersive X-ray spectroscopy （EDX）. XRD study showed that LiCoO2 in the LiBs was roasted to Co, CoO and Co3O4. X-ray mapping analysis showed that no chemical reaction was identified among phases containing Co, Cu or Al elements. In sulfuric acid solution with sodium sulfite, most of the lithium was leached out from the residue, and the cobalt leaching rate could reach up to 75% , but the leaching rate of copper was below 23%. In order to increase the leaching efficiencies of Co and Cu elements, it would be reasonable to extract copper prior to leaching cobalt under the above leaching condition.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2009年第3期382-385,共4页
Chinese Journal of Rare Metals
基金
国家自然科学基金重点资助项目(50734005)
关键词
失效锂离子电池
焙烧
浸出
spent lithium-ion batteries
roasting
leaching
