Photo-Energized MoS2/CNT Cathode for High-Performance Li–CO2 Batteries in a Wide-Temperature Range

IF 26.6 1区材料科学 Q1 Engineering

Nano-Micro Letters Pub Date : 2024-09-21 DOI:10.1007/s40820-024-01506-1

Tingsong Hu, Wenyi Lian, Kang Hu, Qiuju Li, Xueliang Cui, Tengyu Yao, Laifa Shen

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Abstract

Li–CO₂ batteries are considered promising energy storage systems in extreme environments such as Mars; however, severe performance degradation will occur at a subzero temperature owning to the sluggish reaction kinetics. Herein, a photo-energized strategy adopting sustainable solar energy in wide working temperature range Li–CO₂ battery was achieved with a binder-free MoS₂/carbon nanotube (CNT) photo-electrode as cathode. The unique layered structure and excellent photoelectric properties of MoS₂ facilitate the abundant generation and rapid transfer of photo-excited carriers, which accelerate the CO₂ reduction and Li₂CO₃ decomposition upon illumination. The illuminated battery at room temperature exhibited high discharge voltage of 2.95 V and mitigated charge voltage of 3.27 V, attaining superior energy efficiency of 90.2% and excellent cycling stability of over 120 cycles. Even at an extremely low temperature of − 30 °C, the battery with same electrolyte can still deliver a small polarization of 0.45 V by the photoelectric and photothermal synergistic mechanism of MoS₂/CNT cathode. This work demonstrates the promising potential of the photo-energized wide working temperature range Li–CO₂ battery in addressing the obstacle of charge overpotential and energy efficiency.

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用于宽温度范围内高性能锂-二氧化碳电池的光激发 MoS2/CNT 阴极。

锂-CO2 电池被认为是在火星等极端环境中很有前途的储能系统；然而，由于反应动力学缓慢，在零下温度时会出现严重的性能下降。在此，研究人员采用无粘结剂的 MoS2/ 碳纳米管（CNT）光电极作为阴极，在宽工作温度范围内实现了一种采用可持续太阳能的锂-CO2 电池光发电策略。MoS2 独特的层状结构和优异的光电特性促进了光激发载流子的大量产生和快速转移，从而在光照下加速了 CO2 还原和 Li2CO3 分解。在室温下，发光电池的放电电压高达 2.95 V，充电电压为 3.27 V，能量效率高达 90.2%，循环稳定性超过 120 次。即使在零下 30 ℃ 的超低温条件下，采用相同电解质的电池仍能通过 MoS2/CNT 阴极的光电和光热协同机制产生 0.45 V 的微弱极化。这项工作表明，光发电宽工作温度范围锂-CO2 电池在解决充电过电势和能效障碍方面具有巨大潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nano-Micro Letters NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

32.60

自引率

4.90%

发文量

981

审稿时长

1.1 months

期刊介绍： Nano-Micro Letters is a peer-reviewed, international, interdisciplinary, and open-access journal published under the SpringerOpen brand. Nano-Micro Letters focuses on the science, experiments, engineering, technologies, and applications of nano- or microscale structures and systems in various fields such as physics, chemistry, biology, material science, and pharmacy.It also explores the expanding interfaces between these fields. Nano-Micro Letters particularly emphasizes the bottom-up approach in the length scale from nano to micro. This approach is crucial for achieving industrial applications in nanotechnology, as it involves the assembly, modification, and control of nanostructures on a microscale.