阴极
材料科学
电化学
三元运算
锂(药物)
耐久性
钴
兴奋剂
储能
化学工程
纳米技术
电极
光电子学
复合材料
计算机科学
冶金
化学
热力学
物理化学
医学
功率(物理)
物理
工程类
程序设计语言
内分泌学
作者
Geon Tae Park,Su-Bin Kim,Been Namkoong,Nam-Yung Park,Hun Kim,Chong Seung Yoon,Un‐Hyuck Kim
标识
DOI:10.1016/j.mattod.2023.11.006
摘要
For the sustainable development of Li[NixCoyMn1−x−y]O2 and Li[NixCoyAl1−x−y]O2 cathodes, reducing the reliance on cobalt, which is extremely expensive with a fluctuating price and supply uncertainty, is considered essential. In this study, we propose a highly stable Co-free Ni-rich layered cathode developed through a new doping strategy that incorporates heteroelements at different doping stages, including the introduction of Ti during Ni(OH)2 synthesis and doping excess amounts of Al during the lithiation step. The multi-stage engineering strategy guarantees structural durability and electrochemical cycling stability of the inherently unstable LNO to a commercially viable level. Combined with particle surface protection, the Li[Ni0.951Ti0.008Al0.041]O2 cathode retains 72.0% of its initial capacity after 3500 cycles, which is unprecedented among previously reported Co-free cathodes. The proposed Co-free cathodes can meet the energy density required for next-generation electric vehicles, as the cathode delivers 890 Wh kgcathode-1, and presents a clear breakthrough for the development of commercially viable LNO cathode.
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