文献类型：期刊文献

英文题名：{010} oriented Li1.2Mn0.54Co0.13Ni0.13O2@C nanoplate with high initial columbic efficiency

作者：Amzil, Said[1];Zhang, Yi[1];Qiu, Tianpei[1];Jiang, Fei[2];Rao, Hui[1];Fang, Zebo[2];Huang, Junjie[1]

机构：[1]Shaoxing Univ, Coll Chem & Chem Engn, Shaoxing 312000, Peoples R China;[2]Shaoxing Univ, Math Informat Coll, Shaoxing 312000, Peoples R China

年份：2021

卷号：486

外文期刊名：JOURNAL OF POWER SOURCES

收录：SCI-EXPANDED(收录号：WOS:000608786000001)、、EI(收录号：20205209693890)、Scopus(收录号：2-s2.0-85098158619)、WOS

基金：This work is supported by the National Natural Science Foundations of China (21875142, 51872186).

语种：英文

外文关键词：Lithium rich manganese based oxide; Initial columbic efficiency; {010}-oriented planes; Oxygen vacancies; Cathode

外文摘要：Lithium rich Mn-based oxide with high capacity and low cost has been viewed as a promising cathode for lithium ion batteries with high energy density. However, there still exists the drawback of the low initial columbic efficiency that caused by the irreversible electrochemical activation of Li2MnO3. Here, {010}-oriented Li1.2Mn0.54Co0.13Ni0.13O2@C nanoplate is prepared by using active carbon to absorb the ethylene glycol solution containing Li+, Co2+, Mn2+ and Ni2+ after the calcination at 850 degrees C. Ethylene glycol contributes to the formation of the exposed {010} planes, the nanoplate morphology and oxygen vacancies (OVs). The as-prepared material presents a reversible capacity of 276 mA h g(-1) and high initial columbic efficiency of 92% at 25 mA g(-1), superior rate capability and excellent cycling stability. The high initial columbic efficiency is mainly due to OVs with the function to decrease the irreversible charge capacity related with oxygen release over 4.5 V. And the rate capability is improved by the exposed {010} planes for the enhanced Li+ diffusion and the coating carbon for the excellent electron conductivity. Our work provides a facile method for exposing {010} active planes in lithium rich Mn-based oxide with high initial columbic efficiency.