Enhancement of leaching of cobalt and lithium from spent lithium-ion batteries by mechanochemical process

A mechanochemical method with SiO_(2)as the grinding aid was used to enhance the leaching efficiencies of Co and Li from spent lithium batteries(LIBs).Experiment results show that the optimal leaching efficiencies of 94.91%for Co and 97.22%for Li were obtained under the parameters of SiO_(2)/LiCoO_(2)mass ratio of 1:1,grinding speed of 500 r/min and grinding time of 30 min in citric acid.Characterization results indicate that the surficial properties of LiCoO_(2)were changed after mechanochemical grinding treatment due to the newly generated surfaces on LiCoO_(2).Meanwhile,the incompletely coordinated atomic structure and defective lattice structure lead to the activation of LiCoO_(2).The reduction effect of carbon black on Co^(3+)under the action of mechanical forces increases its leaching efficiencies in the citric acid solution.The proposed process was found efficiently to recover Co and Li from LiCoO_(2).

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为了你的身体健康,希望你记住这句警言:避开白色食品。 精白面粉 即七五面粉,是指100千克小麦磨出面粉75千克的面粉。这种面粉感官性状好,粉白细腻,做成各种面食吃起来滑爽,大人小孩都爱吃,其消化率也高。但此种面粉因加工辗磨过细,不仅麦香味淡,筋力小,而且随着出粉率的降低,蛋白质、营养素和无机盐的含量都失掉了很多。精白面与全麦粉(又叫八一面,即100千克小麦磨出面粉81千克)相比,损失了91％的锰,87％的铬。