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首页> 外文期刊>Advanced Functional Materials >3D-Printed Graphene Oxide Framework with Thermal Shock Synthesized Nanoparticles for Li-CO_2 Batteries
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3D-Printed Graphene Oxide Framework with Thermal Shock Synthesized Nanoparticles for Li-CO_2 Batteries

机译：具有3D打印的氧化石墨烯骨架和热冲击合成的Li-CO_2电池纳米粒子

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摘要

Li-CO2 batteries have emerged as a promising energy storage technology due to their high theoretical energy density. A thick electrode design is an effective approach for further increasing the energy density on device level by decreasing the weight and volume ratios of inactive materials. Exploring and designing novel thick electrodes with high catalytic activity toward reversible reaction between lithium and carbon dioxide are key challenges to achieve a low charge overpotential, long cycling stability, and high rate performance. Herein, an ultrathick electrode (approximate to 0.4 mm) design for Li-CO2 batteries by anchoring ultrafine Ni nanoparticles (approximate to 5 nm) on a 3D-printed reduced graphene oxide framework via thermal shock (1900 K for 54 ms) is demonstrated. The cathode displays low overpotential of 1.05 V at 100 mA g(-1), high cycling stability of over 100 cycles, and good rate capability (up to 1000 mA g(-1)). In particular, a high areal capacity of 14.6 mA h cm(-2) can be achieved due to the thick electrode design and uniform distribution of ultrafine catalyst nanoparticles. The strategy of combining an advanced 3D printing technique with fast thermal shock represents a promising direction toward thick electrode design in energy storage devices that are not limited to Li-CO2 batteries.
机译：由于其高的理论能量密度，Li-CO2电池已成为一种有前途的储能技术。厚电极设计是一种有效的方法，可通过降低非活性材料的重量和体积比来进一步提高器件级的能量密度。探索和设计对锂和二氧化碳之间可逆反应具有高催化活性的新型厚电极是实现低电荷超电势，长循环稳定性和高倍率性能的关键挑战。本文展示了一种用于Li-CO2电池的超厚电极（约0.4 mm）设计，该电极通过热冲击（1900 K，持续54 ms）将超细Ni纳米颗粒（约5 nm）锚定在3D打印的还原氧化石墨烯骨架上。阴极在100 mA g（-1）下显示1.05 V的低过电势，在100个周期内具有高循环稳定性，并且具有良好的倍率能力（高达1000 mA g（-1））。特别是，由于电极设计较厚且超细催化剂纳米颗粒的分布均匀，因此可实现14.6 mA h cm（-2）的高面积容量。将先进的3D打印技术与快速热冲击相结合的策略代表了不限于Li-CO2电池的储能装置中厚电极设计的有希望的方向。

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