Study on gas diffusion during the calcination of LiNi0.8Co0.1Mn0.1O2 cathode materials

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers Pub Date : 2025-08-28 DOI:10.1016/j.jtice.2025.106364

Zhaodong Chen , Baikang Hou , Mingyang Zhang , Yuqing Wang , Hailong Peng , Ruifeng Dou , Wen Zhi , Xunliang Liu

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引用次数: 0

Abstract

Background

LiNi_0.8Co_0.1Mn_0.1O₂ (NCM811) is an important raw material for lithium batteries, and its preparation undergoes oxidation reactions. Therefore, the concentration of oxygen affects the oxidation reaction and ultimately the calcination quality of the cathode material.

Methods

In this paper, the permeability of calcined raw materials (the porosities were 0.4059, 0.4358, 0.4555, 0.4965, and 0.5661) under different calcination conditions was first evaluated experimentally, and then the corresponding friction factors were obtained by numerical simulation and compared with the experimental results (error was less than 13%), and the reliability of the model and experimental results was confirmed.

Significant findings

On this basis, the effective diffusion coefficient of the calcined raw material was calculated and compared with the classical formula, and the error was less than 4.72%. The work in this paper has certain guiding importance for the in-depth analysis of the gas diffusion mechanism inside the cathode material and provides a basis for the subsequent study of the relationship between the calcined raw material stack thickness and the gas concentration.

查看原文本刊更多论文

LiNi0.8Co0.1Mn0.1O2正极材料煅烧过程中气体扩散的研究

lini0.8 co0.1 mn0.1 o2 （NCM811）是锂电池的重要原料，其制备过程需经过氧化反应。因此，氧的浓度影响氧化反应，最终影响正极材料的煅烧质量。方法本文首先对不同煅烧条件下煅烧原料的渗透率（孔隙率分别为0.4059、0.4358、0.4555、0.4965和0.5661）进行了实验评价，然后通过数值模拟得到相应的摩擦因数，并与实验结果进行了对比（误差小于13%），验证了模型和实验结果的可靠性。在此基础上，计算了煅烧原料的有效扩散系数，并与经典公式进行了比较，误差小于4.72%。本文的工作对深入分析正极材料内部气体扩散机理具有一定的指导意义，并为后续研究煅烧原料堆厚与气体浓度的关系提供了基础。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of the Taiwan Institute of Chemical Engineers 工程技术-工程：化工

CiteScore

9.10

自引率

14.00%

发文量

362

审稿时长

35 days

期刊介绍： Journal of the Taiwan Institute of Chemical Engineers (formerly known as Journal of the Chinese Institute of Chemical Engineers) publishes original works, from fundamental principles to practical applications, in the broad field of chemical engineering with special focus on three aspects: Chemical and Biomolecular Science and Technology, Energy and Environmental Science and Technology, and Materials Science and Technology. Authors should choose for their manuscript an appropriate aspect section and a few related classifications when submitting to the journal online.