摘要
通过溶液浸泡、超声处理和煅烧包覆等一系列工艺处理对废弃镍钴锰酸锂三元锂电池正极材料进行回收利用得到H-NCM,并对其表面进行In_(2)O_(3)包覆得到In_(2)O_(3)@H-NCM材料。采用X射线衍射(XRD)、扫描电镜(SEM)、充放电测试和循环伏安测试等手段研究回收材料和包覆前后结构、形貌和电化学性能。研究结果表明,回收的材料具有较好的晶体结构,且包覆层未改变材料的主体结构。在0.5C的测试条件下,H-NCM和In_(2)O_(3)@H-NCM样品的首次放电比容量分别为118.6mAh·g^(-1)和121.7mAh·g^(-1),100次循环后,容量保持率分别为80.1%和94.6%。说明回收材料能够用于储锌材料,且包覆层能有效阻止材料与电解液的直接接触,提高材料界面的稳定性。经In_(2)O_(3)包覆后表现出相对较好的电化学性能。该方法为三元锂电池正极材料的回收利用提供了一种可参考借鉴的思路。
H-NCM was obtained by a series of processes,such as solution soaking,ultrasonic treatment and calcination coating,etc.In_(2)O_(3)@H-NCM was prepared by coating the In_(2)O_(3)surface with indium oxide.X-ray diffraction(XRD),Scanning electron microscopy(SEM),charge-discharge and cyclic voltammetry were used to study the structure,morphology and electrochemical properties of the recovered materials.The results show that the recovered material has a good crystal structure,and the coating layer does not change the main structure of the material.The first discharge specific capacities of H-NCM and In_(2)O_(3)@H-NCM samples were 118.6mAh·g^(-1)and 121.7mAh·g^(-1),respectively,under the condition of 0.5C.After 100 cycles,the capacity retention rates were 80.1%and 94.6%,respectively.The results show that the recovered materials can be used as zinc storage materials and have relatively good electrochemical properties after being coated with indium oxide.This method can be used as a reference for the recovery and utilization of cathode materials of ternary lithium batteries.
作者
梁丽娜
韦钰
陈滢蓓
蔡敏
龚睿
LIANG Li-na;WEI Yu;CHEN Ying-bei;CAI Min;GONG Rui(Guangxi Key Laboratory for High-Value Utilization of Manganese Resources,Guangxi Minzu Normal University,Chongzuo 532200,China)
出处
《化学工程师》
2025年第2期93-96,共4页
Chemical Engineer
基金
2024年广西自治区级大学生创新创业训练计划项目(S202410604048)
广西民族师范学院科研经费资助项目(2020FG004)。
关键词
镍钴锰
三元正极材料
回收
氧化铟包覆
nickel cobalt manganese
ternary cathode material
recovery
indium oxide coating
