2021年2月28日，我院黄俊杰教授在化学领域重要期刊《Journal of Power Sources》（2020年影响因子IF为8.247）在线发表题为“{010} oriented Li_1.2Mn_0.54Co_0.13Ni_0.13O₂@C nanoplate with high initial columbic efficiency”的学术成果（文章链接 https://doi.org/10.1016/j.jpowsour.2020.229372）。

该论文的通讯作者为黄俊杰教授，我校为第一完成单位和通讯单位。为解决富锂锰基正极材料的首次库伦效率低的问题，本研究利用乙二醇作为溶剂、络合剂和形貌调控剂合成了具有{010}晶面优势的富锂锰基氧化物正极材料，{010}晶面具有优异的Li⁺迁移能力，因而材料的首次库伦效率和循环稳定性得到显著提升。

Abstract

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 Li_1.2Mn_0.54Co_0.13Ni_0.13O₂@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 °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.

该工作得到国家自然科学基金（21875142）经费资助。