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The flourishing development of multifunctional flexible electronics cannot leave the beneficial role of nature, which provides continuous inspiration in their material, structural, and functional designs. During the evolution of flexible electronics, some originated from nature, some were even beyond nature, and others were implantable or biodegradable eventually to nature. Therefore, the relationship between flexible electronics and nature is undoubtedly vital since harmony between nature and technology evolution would promote the sustainable development. Herein, materials selection and functionality design for flexible electronics that are mostly inspired from nature are first introduced with certain functionality even beyond nature. Then, frontier advances on flexible electronics including the main individual components (i.e., energy (the power source) and the sensor (the electric load)) are presented from nature, beyond nature, and to nature with the aim of enlightening the harmonious relationship between the modern electronics technology and nature. Finally, critical issues in next‐generation flexible electronics are discussed to provide possible solutions and new insights in prospective exploration directions. [ABSTRACT FROM AUTHOR]

With reliable safety, environmental friendliness and cost advantage, aqueous rechargeable batteries have attracted great attention in the field of consumer electronics, static energy storage and power cells in recent decades. In particular, aqueous zinc‐ion batteries (AZIBs) possess a high theoretical capacity (820 mAh g−1 and 5855 mAh cm−3) and low anode potential (−0.76 V vs. standard hydrogen electrode), owing to the bivalent ion migration and the high stability of zinc metal in water, resulting in a relatively satisfactory energy density for practical applications. However, AZIBs still face some challenges, such as zinc dendrite growth, narrow voltage window, active materials dissolution, poor zinc ion insertion/extraction kinetics, and so forth, largely impeding the continued progress of AZIBs. Nanostructure design strategies provide a powerful and broad research thought to effectively solve the above problems, owing to unique properties at the nanoscale. Herein, we demonstrate an overview of recent progress in AZIBs from the perspective of nanostructure design, and focus on the nanostructure engineering of cathode materials, zinc anodes and flexible gel electrolytes, giving rise to an excellent electrochemical performances of AZIBs. Finally, a brief summary for nanostructure design strategies applied in AZIBs is presented, and next research directions are proposed to inspire suggestive instructions for further research into AZIBs. [ABSTRACT FROM AUTHOR]

Achieving high voltage and safety simultaneously in energy storage devices can greatly advance the development of flexible and wearable electronics. Thus, flexible aqueous asymmetric lithium‐ion supercapacitors with a high voltage attract the interest of many researchers. Herein, a new flexible aqueous asymmetric lithium‐ion supercapacitor with a high voltage and superior safety is fabricated using manganese oxide and iron hydroxide, which are electrodeposited on carbon cloths as electrodes and a super‐concentrated gel polymer as the electrolyte. Impressively, the flexible asymmetric lithium‐ion supercapacitor delivers a high voltage of 3.2 V, which is a high value in aqueous asymmetric supercapacitors. Moreover, the asymmetric supercapacitor exhibits a specific capacitance of 227.6 F g−1, a maximum energy density of 49.3 Wh kg−1, and a maximum power density of 11.5 kW kg−1, together with a capacitance retention of 82% after 1000 cycles at a current density of 2 A g−1. Importantly, the supercapacitor can keep good electrochemical performance under extremely harsh conditions, such as compressing, hammering, punching, and tailoring, which demonstrates superior safety. [ABSTRACT FROM AUTHOR]