Flexible and wearable electronics have recently experienced explosive growth, and have attracted tremendous attention from both industry and academia. It is believed that these electronics will bring significant change to our lifestyles in the near future due to the infinite possibilities they can offer. Researchers have demonstrated how cutting-edge discoveries can be translated into the real world, with commercial wearable devices emerging in the mainstream as new favorites.

To support the development of these electronics, energy storage devices with the merits of good electrochemical performance and outstanding flexibility are highly desired. Supercapacitors and batteries are ideal energy storage devices that can easily meet the energy demands of flexible and wearable electronics, and research in the past decade has already achieved great advances in combining the high-energy density of batteries with the high-power density of supercapacitors by developing new energy materials. However, current commercially available supercapacitor and battery systems are still rigid and bulky. As such, it is difficult to incorporate them into integrated and complex devices, which usually leads to bulkiness, low energy density, and poor wearability, thus becoming a bottleneck for the further development of wearable electronics.

This Research Topic welcomes original research articles, reviews and perspectives that describe:

• Flexible supercapacitors
• Flexible lithium ion batteries
• Flexible sodium ion batteries
• Flexible zinc ion batteries
• Flexible metal air batteries
• Other flexible energy storage devices
• Flexible electrode fabrication techniques
• Solid state/quasi solid-state electrolytes

Beyond the above themes, other original research contributions closely related to flexible energy storage devices are also highly welcome.

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Frontiers in Materials

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