An autonomous self-healing mechanism to improve the chemical durability vs. moisture of PVDF-based gel electrolytes for lithium-ion batteries

IF 4.7 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications Pub Date : 2024-04-09 DOI:10.1016/j.elecom.2024.107728

Eleonora Carena , Caterina Colombo , Chiara Ferrara , Riccardo Ruffo , Piercarlo Mustarelli

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Abstract

Lithium-ion batteries (LIBs) are at the forefront of electrochemical energy storage both for consumer electronics, and for power/energy more demanding applications, such as in automotive and grid levelling. However, their chemical and electrochemical stability must be further improved. Among the instability causes, a major role is played by residual moisture. As a matter of fact, hydrofluoric acid generated by hydrolysis of LiPF₆, the most common lithium salt in LIBs, causes safety issues and performance losses. Here we demonstrate the scavenging properties vs. HF of a barium silicate glass used as a filler in a PVDF-HFP based gel polymer electrolyte. A full LiTi₂(PO₄)₃|electrolyte|LiMn₂O₄ cell is stable for 200 cycles at 0.1C.

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改善锂离子电池中基于 PVDF 的凝胶电解质化学耐久性与湿度关系的自主自愈机制

锂离子电池（LIB）在电化学储能领域处于领先地位，既可用于消费电子产品，也可用于电力/能源要求更高的应用领域，如汽车和电网配平。然而，它们的化学和电化学稳定性必须进一步提高。在造成不稳定性的原因中，残留水分起了主要作用。事实上，锂电池中最常见的锂盐 LiPF6 在水解过程中产生的氢氟酸会导致安全问题和性能损失。在此，我们展示了在基于 PVDF-HFP 的凝胶聚合物电解质中用作填料的硅酸钡玻璃的氢氟酸清除特性。一个完整的 LiTi2(PO4)3|电解质|LiMn2O4 电池可在 0.1C 温度下稳定运行 200 个循环。

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来源期刊

Electrochemistry Communications 工程技术-电化学

CiteScore

8.50

自引率

3.70%

发文量

160

审稿时长

1.2 months

期刊介绍： Electrochemistry Communications is an open access journal providing fast dissemination of short communications, full communications and mini reviews covering the whole field of electrochemistry which merit urgent publication. Short communications are limited to a maximum of 20,000 characters (including spaces) while full communications and mini reviews are limited to 25,000 characters (including spaces). Supplementary information is permitted for full communications and mini reviews but not for short communications. We aim to be the fastest journal in electrochemistry for these types of papers.