微生物膜湿气发电机:大面积器件制备及性能研究  

Biofilm-based hygroelectric generator:Research on the fabrication and performance of a large-area device

作　　者：胡启昌 仇英儒 林秀钰 任国平 周顺桂[2] HU QiChang;QIU YingRu;LIN XiuYu;REN GuoPing;ZHOU ShunGui(Fujian Key Laboratory of Agricultural Information Sensoring Technology,College of Mechanical and Electrical Engineering,Fujian Agriculture and Forestry University,Fuzhou 350002,China;College of Resources and Environment,Fujian Agriculture and Forestry University,Fuzhou 350002,China)

机构地区：[1]福建农林大学机电工程学院,福建省农业信息感知技术重点实验室,福州350002 [2]福建农林大学资源与环境学院,福州350002

出　　处：《中国科学：技术科学》2023年第12期2164-2174,共11页Scientia Sinica(Technologica)

基　　金：国家杰出青年科学基金(编号:41925028);中国博士后科学基金(编号:2022M71069);福建省自然科学基金(编号:2022J01154)资助项目。

摘　　要：微生物膜湿气发电装置(b-HEG)具有工艺简单、成本低廉、可持续产电等优势,有望成为水伏技术发展的新方向.然而,目前的b-HEGs还存在器件面积小,功率输出低,且干燥条件下生物膜易发生皲裂,难以制备大面积器件等问题,这严重制约了b-HEG实际应用的进程.在此,本研究以希瓦氏菌(S.o)为基质材料,掺入乙炔黑(AB)和羧甲基纤维素钠(CMC)调控薄膜性能,并优化掺杂含量制备了适合湿气发电的大面积混合生物膜.基于该生物膜与钛网电极,首次构建了高性能的大面积b-HEG(>900 cm2),是目前已报道的最大面积水伏器件单元.该器件在湿度环境下,可持续输出2.3 mA的短路电流,0.58 V的开路电压和0.34 mW的输出功率.同时,大面积b-HEG具备良好的机械性能,耐摩擦(反复摩擦无损),且器件的输出功率密度在器件面积放大后衰减较小,表明其具有较大的器件面积拓展空间.该装置可实现为电容充电或直接驱动小型电子产品,具有较好的商业应用潜力.更重要的是,本研究为规模化制备低成本大面积b-HEGs模块提供了重要指导,推进了水伏技术的实用化进程,对实现“双碳”战略目标具有重要意义.The biofilm-based hygroelectric generator(b-HEG),which uses the interaction between biofilm and water molecules from humidity to generate electricity,has the advantages of a simple process,low cost,and sustainable electricity generation and is expected to become a new development direction of hydrovoltaic technology.However,the b-HEG has some disadvantages,such as a small device area,low power output,and biofilm that is prone to cracking under dry conditions,which makes it difficult to prepare largearea devices,seriously restricting its practical application.In this study,a large-area hybrid biofilm suitable for hygroelectricity generation was prepared by doping acetylene black and sodium carboxymethyl cellulose with Shewanella oneidensis as the matrix material and optimizing the doping ratio.Based on this hybrid biofilm,a high-performance large-area b-HEG(>900 cm2)was constructed with porous titanium mesh as the electrode.Under a high-humidity environment,the large-area b-HEG can continuously generate a short-circuit current of 2.3 mA,open circuit voltage of 0.58 V,and output power of 0.34 mW.Meanwhile,the large-areab-HEG has good mechanical properties and cracking resistance(i.e.,no damage due to repeated friction).The decline of the output power density of the device is insignificant when the device area is scaled up,indicating that it has a larger area to expand.The device can be used to charge capacitors or directly drive small commercial electronics,thereby exhibiting a good potential for commercial applications.More importantly,this study provides important guidance for the large-scale fabrication of low-cost large-area b-HEGs modules and promotes the practical application of hydrovoltaic technology,which is of significance for achieving carbon peaking and carbon neutrality goals.

关 键 词：微生物膜 大面积 高电流 水伏 湿气发电 

分 类 号：TM31[电气工程—电机]