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使用取代型LiCoPO的高压锂离子电池：1.2 Ah软包电池的电化学性能与安全性能

High-Voltage Lithium-Ion Battery Using Substituted LiCoPO: Electrochemical and Safety Performance of 1.2 Ah Pouch Cell.

作者信息

Liu Dongqiang, Kim Chisu, Perea Alexis, Joël Dubé, Zhu Wen, Collin-Martin Steve, Forand Amélie, Dontigny Martin, Gagnon Catherine, Demers Hendrix, Delp Samuel, Allen Jan, Jow Richard, Zaghib Karim

机构信息

Center of Excellence in Transportation Electrification and Energy Storage (CETEES), Hydro Québec, 1806 Boulevard Lionel-Boulet, Varennes, QC J3X 1S1, Canada.

U.S. Army Research Laboratory, 2800 Powder Mill Road, Adelphi, MD 20783, USA.

出版信息

Materials (Basel). 2020 Oct 7;13(19):4450. doi: 10.3390/ma13194450.

DOI:10.3390/ma13194450
PMID:33036469
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7579286/
Abstract

A LiCoPO-based high-voltage lithium-ion battery was fabricated in the format of a 1.2 Ah pouch cell that exhibited a highly stable cycle life at a cut-off voltage of 4.9 V. The high-voltage stability was achieved using a Fe-Cr-Si multi-ion-substituted LiCoPO cathode and lithium bis(fluorosulfonyl)imide in 1-methyl-1-propylpyrrolidinium bis(fluorosulfony)imide as the electrolyte. Due to the improved electrochemical stability at high voltage, the cell exhibited a stable capacity retention of 91% after 290 cycles without any gas evolution related to electrolyte decomposition at high voltage. In addition to improved cycling stability, the nominal 5 V LiCoPO pouch cell also exhibited excellent safety performance during a nail penetration safety test compared with a state-of-the-art lithium ion battery. Meanwhile, the thermal stabilities of the 1.2 Ah pouch cell as well as the delithiated LiCoPO were also studied by accelerating rate calorimetry (ARC), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and in situ X-ray diffraction (XRD) analyses and reported.

摘要

制备了一种基于LiCoPO的高压锂离子软包电池，其容量为1.2 Ah，在4.9 V的截止电压下表现出高度稳定的循环寿命。通过使用Fe-Cr-Si多离子取代的LiCoPO正极和双（氟磺酰）亚胺锂在双（氟磺酰）亚胺1-甲基-1-丙基吡咯烷鎓中的电解质来实现高压稳定性。由于在高压下电化学稳定性的提高，该电池在290次循环后表现出91%的稳定容量保持率，且没有任何与高压下电解质分解相关的气体析出。除了提高循环稳定性外，标称5 V的LiCoPO软包电池在针刺安全测试中与最先进的锂离子电池相比也表现出优异的安全性能。同时，还通过加速量热法（ARC）、热重分析（TGA）、差示扫描量热法（DSC）和原位X射线衍射（XRD）分析研究并报道了1.2 Ah软包电池以及脱锂LiCoPO的热稳定性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/61bc/7579286/81072388219b/materials-13-04450-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/61bc/7579286/fdc4df5e3977/materials-13-04450-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/61bc/7579286/632813f61243/materials-13-04450-g002a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/61bc/7579286/5d7bcc7e14eb/materials-13-04450-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/61bc/7579286/81072388219b/materials-13-04450-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/61bc/7579286/fdc4df5e3977/materials-13-04450-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/61bc/7579286/632813f61243/materials-13-04450-g002a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/61bc/7579286/5d7bcc7e14eb/materials-13-04450-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/61bc/7579286/81072388219b/materials-13-04450-g006.jpg

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本文引用的文献

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ACS Appl Mater Interfaces. 2020 May 6;12(18):20570-20578. doi: 10.1021/acsami.0c04110. Epub 2020 Apr 21.
2
Thermal Stability and Magnetic Properties of Polyvinylidene Fluoride/Magnetite Nanocomposites.聚偏氟乙烯/磁铁矿纳米复合材料的热稳定性和磁性
Materials (Basel). 2015 Jul 22;8(7):4553-4564. doi: 10.3390/ma8074553.
3
Ionic Liquids in Lithium-Ion Batteries.离子液体在锂离子电池中的应用。
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Physical and electrochemical properties of N-alkyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide ionic liquids: PY13FSI and PY14FSI.N-烷基-N-甲基吡咯烷双（氟磺酰）亚胺离子液体PY13FSI和PY14FSI的物理和电化学性质
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