The development of cost-effective, high-performance bifunctional oxygen catalysts shows significant potential for the commercialization of zinc–air batteries (ZABs). In this study, photothermal electrocatalysts consisting of NiCo₂S₄@NiFe layered double hydroxides on a graphene oxide (NiCo₂S₄@NiFe LDH/N-rGO) were crafted. The NiCo₂S₄@NiFe LDH/N-rGO electrocatalyst displayed remarkable bifunctional activity with an impressive ΔE value of 0.636 V under the influence of photothermal effects, far exceeding most advanced systems (generally >0.68 V). At a high current density of 25 mA cm⁻², the NiCo₂S₄@NiFe LDH/N-rGO-based ZAB exhibited an impressive cycling performance, reaching 3410 cycles and extending further to an extraordinary 8285 cycles under illumination conditions. Moreover, when considering flexible all-solid-state ZABs, photothermally-assisted rechargeable batteries displayed outstanding attributes, including exceptional maximum power density (e.g., 151.7 mW cm⁻² at 25 °C), remarkable cycle stability (e.g., over 3480 cycles at −40 °C), and remarkable flexibility, spanning from high temperature (60 °C) to extremely low temperature (−40 °C). Through operando Raman and simulation investigation, it was revealed that the photothermal effect facilitates the generation of oxyhydroxide, underscoring the beneficial impact of light on the electrocatalysis.

中文翻译：

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通过光热过渡金属硫化物异质结构推进耐极端温度的锌-空气电池


经济高效、高性能双功能氧催化剂的开发显示出锌-空气电池 （ZAB） 商业化的巨大潜力。在这项研究中，制备了由氧化石墨烯 （NiCo₂S₄@NiFe LDH/N-rGO） 上的 NiCo₂S₄@NiFe 层状双氢氧化物组成的光热电催化剂。NiCo₂S₄@NiFe LDH/N-rGO 电催化剂表现出显著的双功能活性，在光热效应的影响下，ΔE 值为 0.636 V，远超大多数先进系统（通常为 >0.68 V）。在 25 mA ^cm-2 的高电流密度下，基于 NiCo₂S₄@NiFe LDH/N-rGO 的 ZAB 表现出令人印象深刻的循环性能，达到 3410 次循环，并在照明条件下进一步扩展到非凡的 8285 次循环。此外，当考虑柔性全固态 ZAB 时，光热辅助可充电电池表现出出色的特性，包括出色的最大功率密度（例如，25 °C 时为 151.7 mW ^cm-2）、卓越的循环稳定性（例如，在 -40 °C 下超过 3480 次循环）和卓越的柔韧性，从高温 （60 °C） 到极低温度 （-40 °C）。通过原位拉曼和模拟研究，揭示了光热效应促进了羟基氧化物的产生，强调了光对电催化的有益影响。