氧化石墨烯基柔性发电机的构筑及其水蒸发发电性能

doi:10.11944/j.issn.1000-0518.2020.10.200087

摘要/Abstract

摘要： 如何利用自然界广泛存在的水蒸发能是一个具有挑战性的课题。以表面具有丰富官能团和优异亲水性的氧化石墨烯(GO)做发电材料,以肼还原制备的还原氧化石墨烯(RGO)作电极材料,通过简单滴注法在聚对苯二甲酸乙二酯(PET)衬底上构筑GO/RGO的柔性发电机,并研究其水蒸发诱导的发电性能。结果表明,固定GO薄膜发电机的工作面积为4.5 cm×1.5 cm,以室温自然水蒸发为驱动力,可以输出90 mV的开路电势(V_oc)以及0.6 μA的短路电流(I_sc),最大功率密度可达1.25 μW/cm³。该驱动器同时展示出优异的柔性和较高的稳定性。通过控制体系的水蒸发发生与否,并基于经典流动电势理论,提出了水蒸发诱导的GO/RGO柔性发电机的发电机制。提出了步骤简易、成本低廉、性能稳定的水蒸发驱动的发电机制备新思路,为新型水蒸发能的利用提供了新途径。

关键词: 水蒸发能, 氧化石墨烯, 自驱动发电机, 柔性发电机

Abstract: How to use water evaporation energy which is widely existing in nature is a challenging subject. In this paper, graphene oxide (GO) with abundant functional groups and excellent hydrophilicity was used as the power generation material, and reduced graphene oxide (RGO) prepared by hydrazine reduction was used as the electrode material. GO/RGO flexible generator was assembled by a simple dropping method on the polyethylene terephthalate (PET) substrate. The working area of GO film generator was fixed as 4.5 cm by 1.5 cm, and its power generation performance induced by water evaporation was studied. Driven by natural water evaporation at room temperature, it can output an open circuit voltage (V_oc) of 90 mV and a short circuit current (I_sc) of 0.6 μA as well as power density of 1.25 μW/cm³. The generator also exhibits excellent flexibility and high stability. Based on the classic flow potential theory, the mechanism of GO/RGO generator induced by water evaporation is proposed. This paper provides a new way for the use of water evaporation energy with simple steps, low cost and stable performance.

Key words: water evaporation energy, graphene oxide, self-driven generator, flexible generator

于志强, 曲江英, 李杰兰, 臧云浩, 顾建峰, 高峰. 氧化石墨烯基柔性发电机的构筑及其水蒸发发电性能[J]. 应用化学, 2020, 37(10): 1164-1171.

YU Zhiqiang, QU Jiangying, LI Jielan, ZANG Yunhao, GU Jianfeng, GAO Feng. Assembly of Graphene Oxide-Based Flexible Generator and Its Water Evaporation Power Generation Performance[J]. Chinese Journal of Applied Chemistry, 2020, 37(10): 1164-1171.

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