脱锂富镍NCA和NCM在袋状细胞中热稳定性的比较分析

IF 2.7 4区工程技术 Q3 ELECTROCHEMISTRY

Journal of Electrochemical Energy Conversion and Storage Pub Date : 2023-04-12 DOI:10.1115/1.4062318

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引用次数: 1

摘要

作为两种典型的富镍层状氧化物阴极，LiNi0.8Co0.15Al0.05O2（NCA）和LiNi0.8Co0.1Mn0.1O2（NCM811）在商用电动汽车高能电池中得到了广泛的应用。然而，目前缺乏对其在全电池中的热特性的全面评估。本文通过ARC测试对NCA|SiC袋状电池和NCM811|SiC袋式电池进行了单体级热失控测试。结果表明，NCA|SiC袋状电池和NCM811|SiC袋式电池的{T1、T2、T3}分别为{113.8°C、230.4°C、801.4°C}和{91.3°C、202.1°C、745°C}。然后用DSC-TG-MS测试了NCA和NCM811的热稳定性。结果表明，NCA的相变温度高于NCM811。然而，当NCA和NCM811与阳极电极材料或电解质混合时，NCA产生的热量明显多于NCM811。通过确认NCA|SiC袋状电池和NCM811|SiC袋式电池的热性能，对电池热失控有了更深入的了解，这有助于未来高安全性锂离子电池的设计。

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A Comparative Analysis on Thermal Stability of Delithiated Nickel-Rich NCA and NCM in Pouch Cells

As two typical nickel-rich layered oxide cathodes, LiNi0.8Co0.15Al0.05O2 (NCA) and LiNi0.8Co0.1Mn0.1O2 (NCM811) are widely applicated in commercial high energy batteries for electric vehicles. However, a comprehensive assessment of their thermal characteristics in full cell is currently lacking. In this paper, we conducted monomer level thermal runaway test on NCA|SiC pouch cell and NCM811|SiC pouch cell through ARC test. The results showed that the {T1, T2, T3} of NCA|SiC pouch cell and NCM811|SiC pouch cell are {113.8 °C, 230.4 °C, 801.4 °C } and {91.3 °C, 202.1 °C, 745 °C}, respectively. Then the thermal stability of NCA and NCM811 was tested by DSC-TG-MS. The results showed that the phase transition temperature of NCA is higher than that of NCM811. However, when NCA and NCM811 were mixed with anode electrode materials or electrolyte, NCA produced significantly more heat than NCM811. By confirming the thermal properties of NCA|SiC pouch cell and NCM811|SiC pouch cell, a deeper understanding on battery thermal runaway was achieved, which is helpful for the design of high-safety lithium-ion batteries in the future.

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来源期刊

Journal of Electrochemical Energy Conversion and Storage Engineering-Mechanics of Materials

CiteScore

4.90

自引率

4.00%

发文量

期刊介绍： The Journal of Electrochemical Energy Conversion and Storage focuses on processes, components, devices and systems that store and convert electrical and chemical energy. This journal publishes peer-reviewed archival scholarly articles, research papers, technical briefs, review articles, perspective articles, and special volumes. Specific areas of interest include electrochemical engineering, electrocatalysis, novel materials, analysis and design of components, devices, and systems, balance of plant, novel numerical and analytical simulations, advanced materials characterization, innovative material synthesis and manufacturing methods, thermal management, reliability, durability, and damage tolerance.