1. 3D Hierarchical Sunflower-Shaped MoS 2 /SnO 2 Photocathodes for Photo-Rechargeable Zinc Ion Batteries.
- Author
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Wen X, Zhong Y, Chen S, Yang Z, Dong P, Wang Y, Zhang L, Wang Z, Jiang Y, Zhou G, Liu J, and Gao J
- Abstract
Photo-rechargeable zinc-ion batteries (PRZIBs) have attracted much attention in the field of energy storage due to their high safety and dexterity compared with currently integrated lithium-ion batteries and solar cells. However, challenges remain toward their practical applications, originating from the unsatisfactory structural design of photocathodes, which results in low photoelectric conversion efficiency (PCE). Herein, a flexible MoS
2 /SnO2 -based photocathode is developed via constructing a sunflower-shaped light-trapping nanostructure with 3D hierarchical and self-supporting properties, enabled by the hierarchical embellishment of MoS2 nanosheets and SnO2 quantum dots on carbon cloth (MoS2 /SnO2 QDs@CC). This structural design provides a favorable pathway for the effective separation of photogenerated electron-hole pairs and the efficient storage of Zn2+ on photocathodes. Consequently, the PRZIB assembled with MoS2 /SnO2 QDs@CC delivers a desirable capacity of 366 mAh g-1 under a light intensity of 100 mW cm-2 , and achieves an ultra-high PCE of 2.7% at a current density of 0.125 mA cm-2 . In practice, an integrated battery system consisting of four series-connected quasi-solid-state PRZIBs is successfully applied as a wearable wristband of smartwatches, which opens a new door for the application of PRZIBs in next-generation flexible energy storage devices., (© 2024 The Authors. Advanced Science published by Wiley‐VCH GmbH.)- Published
- 2024
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