High-grade cobalt residue (HGCR) produced in the zinc hydrometallurgy process is usually recovered by acid leaching method. This recovery process has the problems of difficult separation of cobalt and manganese and low recovery ratios. The main components of HGCR are oxides of cobalt and manganese, which can be calcined to form spinel manganese cobaltate, a lithium-sulfur battery cathode material with strong adsorption strength to the “shuttle effect” of polysulfides. Thus, a new idea was proposed for preparation of electrode materials of lithium sulfur battery by co-utilization of cobalt and manganese resources in HGCR. The results showed that the zinc leaching ratio reached 85.9 % with 4 mol/L sodium hydroxide solution at 120 ℃ for 60 min, and the leaching process was controlled by diffusion. Furthermore, the leaching residue was roasted to form manganese cobaltate, which is used in the preparation of lithium-sulfur batteries. Manganese cobaltate/S cathode had a high capacity of 971 mAh/g, which exhibited an application potential as a sulfur host in lithium-sulfur batteries. This study provides a new approach for realizing high-value recovery of HGCR.

中文翻译：

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高品位钴渣中的钴和锰组分共利用制备的锂硫电池

锌湿法冶金过程中产生的高品位钴渣 （HGCR） 通常通过酸浸法回收。这种回收过程存在钴锰分离困难和回收率低的问题。HGCR 的主要成分是钴和锰的氧化物，可以煅烧形成尖晶石锰钴酸盐，这是一种锂硫电池正极材料，对多硫化物的“穿梭效应”具有很强的吸附强度。因此，提出了一种在 HGCR 中利用钴锰资源制备锂硫电池电极材料的新思路。结果表明，4 mol/L 氢氧化钠溶液在 120 °C 下 60 min 的锌浸出率达到 85.9 %，浸出过程采用扩散控制。此外，浸出残渣被烘烤形成钴酸锰，用于制备锂硫电池。钴酸锰/S 阴极具有 971 mAh/g 的高容量，在锂硫电池中显示出作为硫主体的应用潜力。本研究为实现 HGCR 的高值回收提供了一种新方法。