Room temperature acid extraction of Co from LiCo0.2Ni0.8O2 scrap by a mechanochemical treatment
Room temperature acid extraction of Co from LiCo0.2Ni0.8O2 scrap by a mechanochemical treatment
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DOI：
10.1163/156855200750172222
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发表时间：
2000
影响因子：
5.2
通讯作者：
Qiwu Zhang;Jinfeng Lu;F. Saito;C. Nagata;Yuichi Ito
中科院分区：
文献类型：
--
作者：
Qiwu Zhang;Jinfeng Lu;F. Saito;C. Nagata;Yuichi Ito
用机械力化学法（MC）处理含聚偏氟乙烯（PVDF）的LiCo0.2Ni0.8O2废料，在行星磨中加入和不加入Al2O3粉末，用1NHNO3溶液在室温下萃取有价物质。采用MC法对废料中的LiCo0.2Ni0.8O2晶体分别进行了60 min和240 min的处理，使其粉碎并变为非晶态。这表明Al2O3的加入对MC处理是非常有效的.因此，Co以及Ni和Li以大于90%的高产率从非晶废料样品中提取。当在MC处理过程中向废料中加入Al2O3粉末时，PVDF中约1%的氟溶解在滤液中，而从不含Al2O3粉末的研磨废料样品获得的滤液中未检测到氟。
Abstract Room temperature extraction of valuable substances from LiCo 0.2 Ni 0.8 O 2 scrap containing polyvinylidene fluoride (PVDF) has been carried out using 1 N HNO 3 solution after mechanochemical (MC) treatment by a planetary mill with and without Al 2 O 3 powder. Crystalline LiCo 0.2 Ni 0.8 O 2 in the scrap was pulverized and became amorphous by MC treatment for 60 and 240 min, respectively, with and without Al 2 O 3 power. This shows that the addition of Al 2 O 3 is very effective for MC treatment. Accordingly, Co as well as Ni and Li were extracted at a high yield of more than 90% from the amorphous scrap sample. About 1% of fluorine in the PVDF was dissolved in the filtrate when the Al 2 O 3 powder was added to the scrap during the MC treatment, while no fluorine was detected in the filtrate obtained from the ground scrap sample without Al 2 O 3 powder.