材料科学
纤维素
离子
化学工程
电流密度
水分
多孔性
湿度
相对湿度
纳米技术
复合材料
化学
有机化学
物理
量子力学
工程类
热力学
作者
Daewoong Kim,Jakyung Eun,Junhyuck Ahn,Changyong Yim,Sangmin Jeon
出处
期刊:ACS applied electronic materials
[American Chemical Society]
日期:2023-10-20
卷期号:5 (11): 5938-5943
被引量:1
标识
DOI:10.1021/acsaelm.3c00920
摘要
We have developed a method for fabricating and enhancing the performance of moisture-induced power generators (MPGs) through flashlight-induced graphitization. FeCl3-impregnated cellulose papers (FCPs) were photothermally converted to graphitized cellulose papers (GCPs) with a hierarchically porous structure by flashlight irradiation under ambient conditions. During the photothermal process, a portion of the Fe3+ ions was transformed into iron oxide compounds with limited solubility. When a bilayered cellulose paper (BCP), formed by stacking GCP on top of FCP, was exposed to moisture, a potential difference was generated between the collecting electrodes due to the concentration gradient of dissociated Fe3+ ions within the BCP, with a higher concentration in FCP and a lower concentration in GCP. The resulting migration of Fe3+ ions from FCP to GCP caused electron movement along the external circuit. Fe3+ ions were found to serve multiple roles, such as catalysts for graphitization, moisture absorbers, and charge carriers. The BCP-based MPG exhibited a continuous generation of voltage and current outputs, instead of pulsed outputs, with maximum values of 0.39 V for voltage and 28.6 μA/cm2 for current density at 45% relative humidity, representing the highest continuous current density value observed under ambient humidity conditions.
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