Flexible energy storage and fast charging

Why do we need flexible energy storage devices?

To achieve complete and independent wearable devices, it is vital to develop flexible energy storage devices. New-generation flexible electronic devices require flexible and reliable power sources with high energy density, long cycle life, excellent rate capability, and compatible electrolytes and separators.

Could a flexible self-charging system be a solution for energy storage?

Considering these factors, a flexible self-charging system that can harvest energy from the ambient environment and simultaneously charge energy-storage devices without needing an external electrical power source would be a promising solution.

Can ultraflexible energy harvesters and energy storage devices form flexible power systems?

The integration of ultraflexible energy harvesters and energy storage devices to form flexible power systems remains a significant challenge. Here, the authors report a system consisting of organic solar cells and zinc-ion batteries, exhibiting high power output for wearable sensors and gadgets.

What are flexible energy storage devices (fesds)?

Consequently, there is an urgent demand for flexible energy storage devices (FESDs) to cater to the energy storage needs of various forms of flexible products. FESDs can be classified into three categories based on spatial dimension, all of which share the features of excellent electrochemical performance, reliable safety, and superb flexibility.

What are flexible self-charging power sources?

Flexible self-charging power sources integrate energy harvesters, power management electronics and energy-storage units on the same platform; they harvest energy from the ambient environment and simultaneously store the generated electricity for consumption. Thus, they enable self-powered, sustainable and maintenance-free soft electronics.

Are flexible self-charging systems better than rigid devices?

Although flexible self-charging systems are promising, their efficiency remains lower than that of rigid devices. Managing different types of energy devices on a flexible platform demands advances in different aspects, such as materials engineering, device design and power management, to maintain device performance and even achieve synergy 50, 130.