Journal
SMARTMAT
Volume 2, Issue 4, Pages 519-553Publisher
WILEY
DOI: 10.1002/smm2.1076
Keywords
air cathode; flexible electronic device; flexible metal-air battery; gel polymer electrolytes; metal anode
Funding
- National Youth Top-notch Talent Support Program
- State Key Laboratory of Pulp and Paper Engineering Funds [2020C03]
- National Natural Science Foundation of China [31971614, 32071714, 21736003, 52003083]
- Guangzhou Science and Technology Funds [201904010078, 202002030167]
- China Postdoctoral Science Foundation [2019T120725, 2019M652882, 2019M662924, 2020M682711, 2020M682710]
- Guangdong Basic and Applied Basic Research Foundation [2020A1515110705]
- Clean Vehicles, US-China Clean Energy Research Centre (CERC-CVC2) under US DOE EERE Vehicle Technologies Office
- DOE Office of Science [DE-AC02-06CH11357]
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This article discusses the demand for flexible energy storage/conversion devices in wearable and intelligent flexible electronic devices, focusing on the recent research progress and challenges of flexible metal-air batteries. The overview of the structure and configuration of flexible MABs, as well as the research progress on flexible metal anodes, gel polymer electrolytes, and air cathodes, are highlighted. The main challenges and future research perspectives involving flexible MABs for FEDs are also proposed.
With the rapid development of wearable and intelligent flexible electronic devices (FEDs), the demand for flexible energy storage/conversion devices (ESCDs) has also increased. Rechargeable flexible metal-air batteries (MABs) are expected to be one of the most ideal ESCDs due to their high theoretical energy density, cost advantage, and strong deformation adaptability. With the improvement of the device design, material assemblies, and manufacturing technology, the research on the electrochemical performance of flexible MABs has made significant progress. However, achieving the high mechanical flexibility, high safety, and wearable comfortability required by FEDs while maintaining the high performance of flexible MABs are still a daunting challenge. In this review, flexible Zn-air and Li-air batteries are mainly exemplified to describe the most recent progress and challenges of flexible MABs. We start with an overview of the structure and configuration of the flexible MABs and discuss their impact on battery performance and function. Then it focuses on the research progress of flexible metal anodes, gel polymer electrolytes, and air cathodes. Finally, the main challenges and future research perspectives involving flexible MABs for FEDs are proposed.
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