Investigation on synthesis conditions of LiNi1-x-yCoxMnyO2 cathode material via co-precipitation

GENG Shujun; HUANG Qingshan; ZHU Quanhong; JIN Yongcheng; YANG Chao

doi:10.11949/j.issn.0438-1157.20171308

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Investigation on synthesis conditions of LiNi_1-x-yCo_xMn_yO₂ cathode material via co-precipitation

更新时间：2025-12-10

- Investigation on synthesis conditions of LiNi_1-x-yCo_xMn_yO₂ cathode material via co-precipitation
- CIESC Journal Issue 1, Pages: 175-187(2018)
- 作者机构：
  
  1. 中国科学院青岛生物能源与过程研究所,山东,青岛,266101
  2. 中国科学院过程工程研究所, 中国科学院绿色过程与工程重点实验室,北京,100190
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20171308
  CLC： Q031.2
- Online First：05 January 2018，
  
  Published：05 January 2018
- 稿件说明：
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GENG Shujun, HUANG Qingshan, ZHU Quanhong, et al. Investigation on synthesis conditions of LiNi_1-x-yCo_xMn_yO₂ cathode material via co-precipitation[J]. CIESC Journal, 2018, (1): 175-187. DOI: 10.11949/j.issn.0438-1157.20171308.
DOI：

GENG Shujun, HUANG Qingshan, ZHU Quanhong, et al. Investigation on synthesis conditions of LiNi_1-x-yCo_xMn_yO₂ cathode material via co-precipitation[J]. CIESC Journal, 2018, (1): 175-187. DOI: 10.11949/j.issn.0438-1157.20171308. DOI：

摘要

共沉淀法可高效、低能耗制备出较高纯度的球形层状LiNi1-x-yCoxMnyO2正极材料，广泛应用于基础研究和工业生产中，主要包括液相共沉淀及高温煅烧过程。对这两个过程中涉及的机理进行了阐述，并分析相关影响因素，考察了共沉淀制备前体这个关键步骤中颗粒成核过程以及Ni、Co、Mn 3种金属离子发生的络合及沉淀反应。通过建立的反应和热力学平衡方程，分析未沉淀的3种金属离子及其相互之间比值随pH和氨水加入量的二维变化，首次定量得出制备所需Ni、Co、Mn配比三元正极材料的理论最佳条件。此外，从前体及正极材料的结构特性以及最终材料的电化学活性出发，定性探究了最优操作条件。最后，展望了三元正极材料工艺条件优化的科学方法。

Abstract

Layer-structured spherical cathode material

LiNi1-x-yCoxMnyO2

with high purity can be prepared by co-precipitation with high efficiency and low energy consumption. This method has been widely applied in both fundamental research and industrial production

mainly including co-precipitation and high-temperature calcination processes. The mechanisms and influence factors involved in each procedure were elaborated and analyzed. The nucleation process and the complexation and precipitation reactions of Ni

Co and Mn ions were investigated in the key step of co-precipitation for the preparation of precursor. Based on the established equilibrium equations of reactions and thermodynamics

the two-dimensional variations of the three non-precipitated metal concentrations and their mutual ratios for different pH and amounts of NH3 were thoroughly analyzed. Through the analysis results

theoretical optimum conditions for the cathode material with desired metal-ion ratios were thus proposed for the first time. In addition

by means of analyzing the structural characteristics of the precursor and cathode material as well as the electrochemical activity of the final material

the proper operation conditions were qualitatively investigated. Finally

the scientific method for optimizing the process conditions of LiNi1-x-yCoxMnyO2 cathode material was prospected.

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