Multifunctional Composite Designs For Structural Energy

What are structural batteries?

This type of batteries is commonly referred to as “structural batteries”. Two general methods have been explored to develop structural batteries: (1) integrating batteries with light and strong external reinforcements, and (2) introducing multifunctional materials as battery components to make energy storage devices themselves structurally robust.

What is a laminated structural battery architecture?

Figure 1. Laminated structural battery architecture. Structural batteries are hybrid and multifunctional composite materials able to carry load and store electrical energy in the same way as a lithium ion battery.

What makes a good structural battery?

Design Flexibility – Enables sleeker, more compact electronics and vehicles. But achieving this isn't easy. A structural battery must: Store energy efficiently (like a traditional battery). Withstand mechanical stress (like a strong building material). Remain safe (no swelling, overheating, or catastrophic failure).

What is a structural battery composite?

They used a carbon fiber (CF) lamina as a negative electrode and a metal mesh coated with a cathode material as positive electrode, separated by a glass fiber (GF) fabric. The structural battery composite showed promising mechanical performance but could not store electrochemical energy due to poor electrical insulation.

How are structural batteries made?

Structural batteries can be made using a traditional laminated battery architecture similar to that of a fibre reinforced polymer composite laminate in which the positive electrode is also reinforced with carbon fibres coated with lithium iron phosphate. Figure 2. Structural battery aircraft structure.

How do structural batteries work?

Structural batteries are enabled by the recently discovered multifunctional properties of carbon fibers and the development of a structural electrolyte matrix material. The emergent multifunctional properties reach a level that allows lightweight vehicles and innovations across and beyond all transport modes.