期刊
CHEMELECTROCHEM
卷 -, 期 -, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/celc.202300236
关键词
Cathode; copper; doping; fast charging; lithium manganese-rich
In this study, Li1.15Mn0.7Ni0.2Co0.1O2 was synthesized via a sol gel method and doped with varying amounts of copper. 1% Cu doping resulted in enhanced capacity retention (from 58% to 78%) but decreased overall capacity, while 10% Cu doping increased capacity by 21%. Thorough characterization was conducted to understand these results, highlighting the importance of targeting specific stoichiometries for desired electrochemical characteristics.
Lithium manganese-rich layered oxides are promising cathode materials for lithium-ion batteries due to their high discharge capacity, but they suffer from capacity fading and poor rate performance. Herein we report on the physicochemical and electrochemical properties of Li1.15Mn0.7Ni0.2Co0.1O2 synthesized via a sol gel method, and study the effect of copper doping on the resulting materials. Electrochemical testing at 1 C revealed 1 % Cu doping enhanced capacity retention (from 58 % to 78 %) but also decreased capacity, while in contrast 10 % Cu doping increased capacity by 21 %. Thorough characterization (including x-ray diffraction, scanning electron microscopy, inductively coupled plasma-optical emission spectroscopy, and electrochemical analyses such as voltage vs. capacity and dQ/dV plots) was employed to understand these results, which may be attributed to the competition of two different phenomena depending on the copper content. Consequently, this work highlights the importance of targeting bespoke stoichiometries depending on the desired electrochemical characteristics - an important point for the future design of materials for fast charging and high power applications.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据