将可扩展合成的石墨烯气溶胶凝胶材料转化为高柔性、宽温差印刷微型超级电容器

APL Energy Pub Date : 2024-01-25 DOI:10.1063/5.0186302
Kh M Asif Raihan, S. Sahoo, T. Nagaraja, Shusil Sigdel, Brice Lacroix, Christopher M. Sorensen, Suprem R. Das
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引用次数: 0

摘要

对可在宽温度范围内工作的便携式、可弯曲、可扭转和可穿戴微电子的需求日益增长,激发了人们对利用可扩展制造技术开发固态柔性储能器件的极大兴趣。在此,我们通过喷墨打印技术开发了基于石墨烯气溶胶凝胶的添加式制造全固态微型超级电容器(MSCs),其工作温度范围为 -15 ℃ 至 +70 ℃,并使用相互咬合的指状电极和 PVA/H3PO4 固态电解质表现出超稳定和可靠的电化学性能。石墨烯气溶胶凝胶采用可扩展的单步合成法,从气相前驱体中通过引爆工艺获得,产生纳米级壳型结构。在 0.25 μA 的恒定电流下,制成的基于石墨烯气溶胶凝胶的固态 MSC 的体积电容达到 376.63 mF cm-3(等效电容为 76.23 μF cm-2),并在 10,000 次循环中表现出卓越的循环稳定性(电容保持率为 99.6%)。为了利用所制备的石墨烯气溶胶凝胶固态 MSC 的机械强度,研究人员对其在各种弯曲和扭转角度下的超级电容性能进行了仔细研究,结果表明其具有出色的机械柔韧性。此外,为了研究制备的石墨烯气溶胶凝胶固态 MSC 在严格环境下的电化学性能,如上所述进行了广泛的温度依赖性超级电容分析。基于气溶胶凝胶的全固态石墨烯气溶胶固态 MSC 的电化学结果表明,为基于物联网的智能电子设备开发可扩展、可靠的未来微型化储能设备提供了一条极具潜力的途径。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Transforming scalable synthesis of graphene aerosol gel material toward highly flexible and wide-temperature tolerant printed micro-supercapacitors
The ever-growing demand for portable, bendable, twistable, and wearable microelectronics operating in a wide temperature range has stimulated an immense interest in the development of solid-state flexible energy storage devices using scalable fabrication technology. Herein, we developed additively manufactured graphene aerosol gel-based all-solid-state micro-supercapacitors (MSCs) via inkjet printing with functioning temperature in the range from −15 to +70 °C and exhibiting a super-stable and reliable electrochemical performance using interdigitated finger electrodes and PVA/H3PO4 solid-state electrolyte. The graphene aerosol gel was obtained using a scalable single step synthesis method from a gas phase precursor using a detonation process, producing a nanoscale shell type structure. The fabricated graphene aerosol gel-based solid-state MSC achieved a volumetric capacitance of 376.63 mF cm−3 (areal capacitance of 76.23 μF cm−2) at a constant current of 0.25 μA and demonstrated exceptional cyclic stability (∼99.6% of capacitance retention) over 10 000 cycles. To exploit the mechanical strength of the as-fabricated graphene aerosol gel-based solid-state MSC, its supercapacitive performance was scrutinized under various bending and twisting angles and the results showed excellent mechanical flexibility. Furthermore, to study the electrochemical performance of the as-fabricated graphene aerosol gel solid-state MSC in stringent surroundings, a broad temperature dependent supercapacitive analysis was performed as stated above. The electrochemical results of the as-fabricated graphene aerosol gel based all-solid-state MSC exhibit a highly potential route to develop scalable and authentic future miniaturized energy storage devices for IoT based smart electronic appliances.
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