Flexible Batteries - Paperbackby Ye Zhang (Author), Lie Wang (Author), Yang Zhao (Author) Flexible Batteries highlights the key advances in flexible batteries, a booming new direction in the energy storage field. The authors first introduce lithium ion batteries, which are currently the most widely used batteries. Flexible aqueous batteries such as aqueous lithium ion, sodium ion, and zinc ion batteries are discussed subsequently due to the safety concerns in organic electrolytes.