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...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.展开更多
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)+4 种基金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 Hongthe 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 CASTthe DHU Distinguished Young Professor Program to Prof.WANG Li Ming。
文摘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.
