Improved electrochemical performance for high voltage spinel LiNi0.5Mn1.5O4 modified by supercritical fluid chemical deposition

Data set from Improved electrochemical performance for high voltage spinel LiNi0.5Mn1.5O4 modified by supercritical fluid chemical deposition - Publication : Courbaron G., Petit E., Serrano-Sevillano J., Labrugère C., Olchowka J., Carlier D., Delpuech N., Aymonier C. and Croguennec L. Improved electrochemical performance for high voltage spinel LiNi0.5Mn1.5O4 modified by supercritical fluid chemical deposition. ACS Applied Materials Interfaces 2023 vol.15, n°2, p.2812–2824. HAL : https://hal.science/hal-03947373 Dataset production context : Among candidates at the positive electrode of the next generation of Li-ion technology and even beyond post Li-ion technology as all-solid-state batteries, spinel LiNi0.5Mn1.5O4 (LNMO) is one of the favorites. Nevertheless, before its integration into commercial systems, challenges still remain to be tackled, especially the stabilization of interfaces with the electrolyte (liquid or solid) at high voltage. In this work, a simple, fast, and cheap process is used to prepare a homogeneous coating of Al2O3 type to modify the surface of the spinel LNMO: the supercritical fluid chemical deposition (SFCD) route. This process is, to the best of our knowledge, used for the first time in the battery field. Significantly improved performance was demonstrated vs those of bare LNMO, especially at high rates and for highly loaded electrodes. For more information see the article.

数据集来源：本数据集源自《超临界流体化学沉积改性高压尖晶石LiNi₀.₅Mn₁.₅O₄的电化学性能提升》相关研究，发表文献作者为Courbaron G.、Petit E.、Serrano-Sevillano J.、Labrugère C.、Olchowka J.、Carlier D.、Delpuech N.、Aymonier C.及Croguennec L.。研究论文题为《Improved electrochemical performance for high voltage spinel LiNi0.5Mn1.5O4 modified by supercritical fluid chemical deposition》，发表于《ACS Applied Materials & Interfaces》（ACS 应用材料与界面）2023年第15卷第2期，页码范围2812–2824，HAL存档链接为https://hal.science/hal-03947373。
数据集制作背景：作为下一代锂离子电池技术乃至全固态电池等后锂离子电池技术的正极候选材料之一，尖晶石LiNi₀.₅Mn₁.₅O₄（spinel LiNi₀.₅Mn₁.₅O₄, LNMO）是极具竞争力的候选材料。然而在实现商业化应用前，仍有诸多挑战亟待攻克，特别是高压工况下与液态或固态电解质的界面稳定性问题。本研究采用一种简便、快速且低成本的工艺，对尖晶石LNMO的表面制备Al₂O₃型均匀涂层以实现改性，即超临界流体化学沉积（supercritical fluid chemical deposition, SFCD）法。据我们所知，该工艺首次应用于电池领域。实验结果表明，相较于未改性的纯相LNMO，改性后材料的电化学性能得到显著提升，尤其在高倍率放电及高负载电极场景中表现突出。更多详细信息可参阅该研究论文。