The Research Toward Commercial Application of High-Energy Density Solid/liquid Hybrid Battery

Solid/liquid hybrid lithium ion battery is being one of hot topics in battery research owing to its higher energy density and safety in comparison with liquid lithium ion battery. However, disadvantages in fast charging and relevant lifetime are becoming the current technical challenges for hindering its commercial application. In view of this, one solid/liquid hybrid lithium ion battery with energy density around 270 Wh/kg has been developed which is devoted to improving overall performance parameters. Evaluation results indicated that the battery could be charged from 20% to 80%SOC within 19 min, and only 8% capacity fading was found during 1700 cycles with fast charging protocol. Furthermore, there were no fire/flame and no explosion in case of overcharge (1.3 times higher than upper cut-off voltage) and nail penetration (100%SOC). The aforementioned excellent performance was capable of meeting the strict requirements of traction battery for electric vehicles. Finally, it would optimistically have a significant impact in commercialization process that this solid/liquid hybrid lithium ion battery is in application to electric vehicles.