Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 14, Issue 46, Pages 51941-51953Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.2c15011
Keywords
autonomous self-healing; dynamic hydrogen bonding; smart functionalities; gel electrolyte; cross-linking; lithium batteries
Funding
- Italian Ministry of Foreign Affairs and International Cooperation
Ask authors/readers for more resources
Next-generation Li-ion batteries need to have improved durability, quality, reliability, and safety to meet the stringent technical requirements of crucial sectors like e-mobility. One approach to overcome degradation is the use of advanced materials with self-healing properties, such as the gel electrolyte proposed in this study.
Next-generation Li-ion batteries must guarantee improved durability, quality, reliability, and safety to satisfy the stringent technical requirements of crucial sectors such as e mobility. One breakthrough strategy to overcome the degradation phenomena affecting the battery performance is the development of advanced materials integrating smart functionalities, such as self healing units. Herein, we propose a gel electrolyte based on a uniform and highly cross-linked network, hosting a high amount of liquid electrolyte, with multiple advantages: (i) autonomous, fast self-healing, and a promising PF5-scavenging role; (ii) solid-like mechanical stability despite the large fraction of entrapped liquid; and (iii) good Li+ transport. It is shown that such a gel electrolyte has very good conductivity (>1.0 mS cm-1 at 40 degrees C) with low activation energy (0.25 eV) for the ion transport. The transport properties are easily restored in the case of physical damages, thanks to the outstanding capability of the polymer to intrinsically repair severe cracks or fractures. The good elastic modulus of the cross linked network, combined with the high fraction of anions immobilized within the polymer backbone, guarantees stable Li electrodeposition, disfavoring the formation of mossy dendrites with the Li metal anode. We demonstrate the electrolyte performance in a full-cell configuration with a LiNi0.8Mn0.1Co0.1O2 (NMC811) cathode, obtaining good cycling performance and
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available