Do flexible batteries need structural design?

However, the development of flexible batteries is largely focused on advanced electrodes or electrolytes, and little attention is paid to the structural design. In this perspective, we highlight the structural design strategies and corresponding requirements of flexible batteries for typical flexible electronic devices.

What is a flexible battery?

To adapt to the practical flexible electronic devices, these flexible batteries are typically fabricated in 1D fiber-shaped, 2D planar-shaped, or 3D structured configurations based on corresponding flexible electrodes, current collectors, and electrolytes.

How can a battery be flexible?

The flexibility of batteries can be achieved by flexible substrates such as flexible foil or wire in the deformed region. Similar to PAMAD, the thickness of the deformation area is much thinner than the active material area to keep the balance between high energy density and flexibility.

What is a typical structure of a flexible battery?

In this review, typical structures of flexible batteries are firstly introduced and classified into mono-dimensional (1D), two-dimensional (2D), and three-dimensional (3D) structures according to their configurations.

Why are flexible batteries important?

This perspective holds significant relevance for the advancement of flexible batteries. Flexible batteries can withstand harsh conditions and complex deformations through effective structure design while maintaining stable electrochemical performance and an intact device during the strain yield process.

Are flexible batteries based on structure classification?

Although flexible batteries have come a long way, most of them focus on the exploitation of advanced materials and the enumeration of potential structures. The prevailing approach to structure classification in the field is still based on the shape and mode of deformation of batter.