Flexible, self-cleaning, and high-performance ceramic nanofiber-based moist-electric generator enabled by interfacial engineering

作     者：WANG LiMing FENG LanLan SUN Zhao Yang HE XinYang WANG RongWu QIN XiaoHong YU JianYong WANG LiMing;FENG LanLan;SUN ZhaoYang;HE XinYang;WANG RongWu;QIN XiaoHong;YU JianYong

作者机构：Key Laboratory of Textile Science&TechnologyMinistry of EducationCollege of TextilesDonghua UniversityShanghai 201620China Innovation Center for Textile Science and TechnologyDonghua UniversityShanghai 201620China 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2022年第65卷第2期

页      面：450-457页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：partly supported by the Fundamental Research Funds for the Central Universities(Grant Nos.2232020D-15,2232020A-08,2232020G-01,2232020D-14,2232019D3-11) the National Natural Science Foundation of China(Grant Nos.51773037,51973027,51803023,52003044,61771123) supported by the Chang Jiang Scholars Program and the Innovation Program of Shanghai Municipal Education Commission(Grant No.2019-01-07-00-03-E00023)to Prof.QIN Xiao Hong the Shanghai Sailing Program(Grant No.19YF1400700) the Opening Project of State Key Laboratory of High Performance Ceramics and Superfine Microstructure(Grant No.SKL201906SIC) the Young Elite Scientists Sponsorship Program by CAST the DHU Distinguished Young Professor Program to Prof.WANG Li Ming。 

主　　题：moist-electric generation ceramic nanofiber electrospinning flexible self-cleaning 

摘      要：Due to their long-term stability, even under extreme conditions, oxide ceramics have attracted significant attention in emerging fields like moist-electric generation. However, the inherent brittleness and low voltage output of oxide ceramic-based moistelectric generators(MEGs) limit their applications in wearable electronics. Herein, a facile strategy involving the combination of sol-gel electrospinning and calcination is used to fabricate flexible and freestanding Ti O_(2)/Zr O_(2)(TZ) composite nanofiber-based MEGs. The excellent flexibility of the TZ nanofiber membranes can be attributed to the suppression of their crystal structure transformation, dispersion of stress concentration, and reduction of crack propagation via interfacial engineering. The porous structure of the electrospun nanofiber membrane features an abundance of charged narrow channels for the diffusion of water molecules and generates a streaming potential. The optimal voltage output reached ~0.8 V, which is the highest value reported for an oxide ceramic-based MEG. Furthermore, the as-fabricated nanofiber-based MEG exhibits good self-cleaning capability to degrade organic pollutants under ultraviolet irradiation. By integrating mechanical flexibility, high performance, and a selfcleaning effect, this work presents a new idea for exploring diverse, efficient, and wearable oxide ceramic-based MEGs.