Inês F. Monteiro , Rafael S. Pinto , Maria M. Silva , Arkaitz Fidalgo-Marijuan , Carlos M. Costa , Senentxu Lanceros-Méndez , Renato Gonçalves
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引用次数: 0
Abstract
The critical issue of thermal runaway events in lithium-ion batteries (LIBs) is recognized as a primary cause of battery-related accidents. Despite ongoing efforts to enhance LIB safety, challenges persist due to varying chemical compositions, states of charge, and conditions of use across different batteries. To advance battery safety and considering cost and practicality, this research introduces a novel cathode material with thermal shutdown characteristics. Incorporating thermoplastic microspheres into the cathode matrix does not compromise the cathode's structural integrity, but leads to ionic conductivity value reduction, and a consequent reduction of battery performance for the larger microsphere concentrations of 5.0 wt% and 7.5 wt%. On the other hand, the samples demonstrate a thermal shutdown behaviour, triggered by the volumetric expansion of the microspheres, effectively ceasing electrical and ionic conduction, thereby preventing thermal runaway. The cathode with low microsphere concentration, 2.5 wt% of microspheres, outperforms (155 mAh·g−1, at C/8-rate) room temperature battery performance with respect to the conventional cathode and also exhibits thermal shutdown behaviour at 90 °C. The research highlights the potential of integrating expandable microspheres into cathodes for the development of safer batteries, offering a scalable and cost-effective solution compatible with existing battery technologies.
期刊介绍:
The Journal of Power Sources is a publication catering to researchers and technologists interested in various aspects of the science, technology, and applications of electrochemical power sources. It covers original research and reviews on primary and secondary batteries, fuel cells, supercapacitors, and photo-electrochemical cells.
Topics considered include the research, development and applications of nanomaterials and novel componentry for these devices. Examples of applications of these electrochemical power sources include:
• Portable electronics
• Electric and Hybrid Electric Vehicles
• Uninterruptible Power Supply (UPS) systems
• Storage of renewable energy
• Satellites and deep space probes
• Boats and ships, drones and aircrafts
• Wearable energy storage systems