The effects of Fe/Al co-modified Ni-rich Li[Ni1-x-yCoxMny]O2 for enhancing electrochemical performance

被引:3
作者
Kim, Wooseok [1 ]
Park, Sanghyuk [1 ]
Ko, Gyeongbin [1 ]
Kwon, Kyungjung [1 ]
机构
[1] Sejong Univ, Dept Energy & Mineral Resources Engn, Seoul 05006, South Korea
基金
新加坡国家研究基金会;
关键词
Lithium-ion batteries; Cathode materials; Coprecipitation; Calcination; Doping; CATHODE MATERIAL; LITHIUM; AL; STABILITY; BATTERIES;
D O I
10.1016/j.jpcs.2022.110925
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Various impurities such as Cu, Al, and Fe can be incorporated in the leachate of spent lithium-ion batteries (LIB) after a conventional acidic leaching process. Here, we synthesize Fe/Al co-modified Ni-rich Li[Ni1-x-yCoxMny (NCM) cathode materials via a coprecipitation reaction for Fe doping and the subsequent calcination process for additional Al doping. The purpose of this work is to seek a potential of utilizing the positive effects of impurity elements for improving the LIB performance of Ni-rich NCM. The physicochemical properties of cathode materials are compared by scanning electron microscopy, energy dispersive spectroscopy, inductively coupled plasma optical emission spectroscopy and X-ray diffraction analysis. Electrochemical analyses including galvanostatic intermittent titration technique, differential capacity curves from cycling data are systematically per -formed to assess the effects of the sequential doping processes. It is found that an Al doping content of 1% in Fe -doped NCM is optimal in terms of rate and cycle performances. This study proposes a rational design for upgrading the resynthesized Ni-rich NCM cathode materials from the leachate of spent LIBs.
引用
收藏
页数:7
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