Based on the specific requirements of different flexible devices, suitable flexible batteries can be selected for the commercial field, providing a reference for basic research and practical application of flexible batteries.
By now, many different kinds of flexible batteries have been developed, including flexible alkaline batteries, flexible polymer based batteries, flexible lithium-metal batteries, and flexible rechargeable lithium ion batteries [, , ].
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.
Herein, we systematically and comprehensively review the fundamentals and recent progresses of flexible batteries in terms of these important aspects. Specifically, we first discuss the requirements for constituent components, including the current collector, electrolyte, and separator, in flexible batteries.
Nevertheless, progress in flexible batteries has enabled the applications of several fields such as medical monitoring, human-machine interaction, and bionic robots.
Flexible batteries have the potential to develop an ideal energy storage system for future electronics due to their advantages in safety, working temperature, high energy density, and packaging. The entire battery architecture must be transformed to design flexible batteries, including active materials, electrolyte, and separators.
We begin with a brief introduction of flexible lithium-ion batteries and the current development of flexible solid-state electrolytes for applications in this field. This is followed by a detailed overview of the recent progress on flexible electrode …