Flexible One-Dimensional Zn-Based Electrochemical Energy Storage Devices: Recent Progress and Future Perspectives

One-dimensional (1D) Zn-based electrochemical energy storage devices (1DZESDs) stand out as a promising candidate in recent years to power wearable electronics due to their unique features, such as good energy storage performance, high safety, low cost, environmental friendliness, and mechanical flexibility. In the past few years, great progress has been made in exploring different 1DZESDs including Zn-ion batteries, alkaline Zn batteries, Zn-air batteries, and Zn-ion capacitors. Numerous strategies have been reported to improve their energy storage performance, mechanical properties, and even endow them with multifunctionality to meet the requirements of practical utilization. Here, we present a brief history of the development of 1DZESDs. Fundamental chemistry and significant achievements regarding different types of 1DZESDs are highlighted. At the same time, we have critically examined current challenges and analyzed potential solutions for the fabrication and utilization of high-performance 1DZESDs. Beyond that, insightful perspectives on future efforts are provided to further push 1DZESDs towards practical utilization. The development of 1DZESDs is summarized here, with existing obstacles diagnosed, corresponding solutions proposed, and future direction indicated accordingly. We hope this review can stimulate more research to realize the practical applications of 1DZESDs in powering wearable electronics.