Conductive Additives Effects on NCA–LFMP Composite Cathode in Water-Based Binder for High-Safety Lithium-Ion Batteries

IF 1.5 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Micro & Nano Letters Pub Date : 2023-09-05 DOI:10.3390/micro3030052

Chih-Wei Yang, Meng-Lun Lee, Wen-Ren Liu, Celastin Bebina Thairiyarayar, Wei-Ren Liu, Tsan-Yao Chen, Chi-Young Lee

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引用次数: 0

Abstract

Lithium nickel–cobalt–aluminum oxide (NCA) is a promising cathode material for lithium-ion batteries due to its high energy density of more than 274 mAh/g. However, thermal runaway inhibits its practical applications. Lithium ferromanganese phosphate (LFMP), due to its olivine structure, can effectively stabilize the surface stability of NCA and reduce the exothermic reactions that occur during thermal runaway. LFMP can also inhibit cathode expansion and contraction during charging and discharging. To improve the conductivity of an NCM–LFMP composite electrode, three different conductive additives, namely carbon black, carbon nanotubes (CNTs), and graphene, were introduced into the electrode. Finally, battery safety tests were conducted on 1.1 Ah pouch cells fabricated in the present study. The energy density of the NCA–LFMP 1.1 Ah lithium-ion pouch cells with only 0.16% CNT content reached 224.8 Wh/kg. The CNT–NCA–LFMP pouch cell was also the safest among the cells tested. These results provide a strategy for designing high-energy-density and safe pouch cells for energy storage device applications.

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导电添加剂对高安全性锂离子电池水性粘结剂NCA-LFMP复合阴极的影响

锂镍钴铝氧化物(NCA)具有274 mAh/g以上的高能量密度，是一种很有前途的锂离子电池正极材料。然而，热失控阻碍了它的实际应用。磷酸锰铁锂(LFMP)由于其橄榄石结构，可以有效地稳定NCA的表面稳定性，减少热失控过程中发生的放热反应。LFMP还能抑制充放电过程中阴极的膨胀和收缩。为了提高NCM-LFMP复合电极的导电性，在电极中引入了三种不同的导电添加剂，即炭黑、碳纳米管(CNTs)和石墨烯。最后，对本研究制备的1.1 Ah袋状电池进行了电池安全性测试。碳纳米管含量仅为0.16%的NCA-LFMP 1.1 Ah锂离子袋状电池能量密度达到224.8 Wh/kg。CNT-NCA-LFMP袋状细胞也是测试细胞中最安全的。这些结果为设计用于储能装置的高能量密度和安全的袋状电池提供了一种策略。

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

Micro & Nano Letters 工程技术-材料科学：综合

CiteScore

3.30

自引率

0.00%

发文量

审稿时长

2.8 months

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