The Effect of Excessive Sulfate in the Li-Ion Battery Leachate on the Properties of Resynthesized Li[Ni1/3Co1/3Mn1/3]O2

被引:11
|
作者
Lee, Jimin [1 ]
Park, Sanghyuk [1 ]
Beak, Mincheol [1 ]
Park, Sang Ryul [2 ]
Lee, Ah Reum [2 ]
Byun, Suk Hyun [2 ]
Song, Junho [3 ]
Sohn, Jeong Soo [4 ]
Kwon, Kyungjung [1 ]
机构
[1] Sejong Univ, Dept Energy & Mineral Resources Engn, 209 Neungdong Ro, Seoul 05006, South Korea
[2] SungEel HiTech Co Ltd, 143-12 Gunsansandan Ro, Gunsan Si 54002, South Korea
[3] Korea Elect Technol Inst, 25 Saenari Ro, Gunsan Si 54002, South Korea
[4] Korea Inst Geosci & Mineral Resources, Mineral Resources Res Div, Resources Recovery Res Ctr, 124 Gwahak Ro, Daejeon 34132, South Korea
基金
新加坡国家研究基金会;
关键词
Li-ion battery; cathode material; sulfate; impurity; leachate; ELECTROCHEMICAL PERFORMANCE; CATHODE MATERIALS; LITHIUM; RECOVERY; KINETICS; METALS;
D O I
10.3390/ma14216672
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
In order to examine the effect of excessive sulfate in the leachate of spent Li-ion batteries (LIBs), LiNi1/3Co1/3Mn1/3O2 (pristine NCM) and sulfate-containing LiNi1/3Co1/3Mn1/3O2 (NCMS) are prepared by a co-precipitation method. The crystal structures, morphology, surface species, and electrochemical performances of both cathode active materials are studied by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and charge-discharge tests. The XRD patterns and XPS results identify the presence of sulfate groups on the surface of NCMS. While pristine NCM exhibits a very dense surface in SEM images, NCMS has a relatively porous surface, which could be attributed to the sulfate impurities that hinder the growth of primary particles. The charge-discharge tests show that discharge capacities of NCMS at C-rates, which range from 0.1 to 5 C, are slightly decreased compared to pristine NCM. In dQ/dV plots, pristine NCM and NCMS have the same redox overvoltage regardless of discharge C-rates. The omnipresent sulfate due to the sulfuric acid leaching of spent LIBs has a minimal effect on resynthesized NCM cathode active materials as long as their precursors are adequately washed.
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页数:9
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