Composite-fabric-based structure-integrated energy storage system

A structure-battery-integrated energy storage system based on carbon and glass fabrics is introduced in this study. The carbon fabric current collector and glass fabric separator extend from the electrode area to the sur-rounding structure. This system provides stable and high electrochemical performance under the mechanical loading of the composite structural battery. A thermoplastic tape melted into the fabrics separates the battery and structural parts to prevent penetration of epoxy into the battery part during autoclave molding and leakage of liquid electrolyte. Furthermore, a stainless-steel film blocks moisture penetration in the direction of the thick-ness. The electrochemical characteristics and mechanical stability of the structural battery were evaluated using a galvanic cell tester. The initial capacity of the structural battery was approximately 125 mAh/gLFP, and exhibited steady cycling characteristics with a capacity of 110 mAh/gLFP for up to 50 charging/discharging cycles. The structure-integrated battery exhibited an energy density of over 25 Wh/kgstr, stable electrochemical performance, and load-bearing characteristics even when some of the battery components were subjected to tensile strain beyond the 1% level.

Automated summary

This study introduces a structure-battery-integrated energy storage system based on carbon and glass fabrics, providing stable and high electrochemical performance under mechanical loading. The system utilizes a thermoplastic tape to separate the battery and structural parts and prevent penetration and leakage. Evaluation shows initial capacity of approximately 125 mAh/gLFP and steady cycling characteristics of 110 mAh/gLFP for 50 cycles. The structure-integrated battery exhibits an energy density of over 25 Wh/kgstr and remains stable even under tensile strain beyond 1%.