The urgent demand for portable electronics has promoted the development of high-efficienc）9 sustainable, and even stretchable self-charging power sources. In this work, we propose a flexible self-charging power unit ...The urgent demand for portable electronics has promoted the development of high-efficienc）9 sustainable, and even stretchable self-charging power sources. In this work, we propose a flexible self-charging power unit based on folded carbon （FC） paper for harvesting mechanical energy from human motion and power portable electronics. The present unit mainly consists of a triboelectric nanogenerator （FC-TENG） and a supercapacitor （FC-SC）, both based on folded carbon paper, as energy harvester and storage device, respectively. This favorable geometric design provides the high Young＇s modulus carbon paper with excellent stretchability and enables the power unit to work even under severe deformations, such as bending, twisting, and rolling. In addition, the tensile strain can be maximized by tuning the folding angle of the triangle-folded carbon paper. Moreover, the waterproof property of the packaged device make it washable, protect it from human sweat, and enable it to work in harsh environments. Finally, the as-prepared self-charging power unit was tested by placing it on the human body to harvest mechanical energy from hand tapping, foot treading, and arm touching, successfully powering an electronic watch. This work demonstrates the impressive potential of stretchable self-charging power units, which will further promote the development of high Young＇s modulus materials for wearable/portable electronics.展开更多
以厌氧污泥为接种微生物构建H型双室微生物燃料电池,考察不同电极材料(碳纸和碳布)对微生物燃料电池(MFC)产电性能的影响。结果表明,采用碳布为电极材料的MFC启动更快,18 h达到稳定,但在稳定期采用碳纸为电极材料比采用碳布为电极材料的...以厌氧污泥为接种微生物构建H型双室微生物燃料电池,考察不同电极材料(碳纸和碳布)对微生物燃料电池(MFC)产电性能的影响。结果表明,采用碳布为电极材料的MFC启动更快,18 h达到稳定,但在稳定期采用碳纸为电极材料比采用碳布为电极材料的MFC电压高出20 m V左右。采用碳布电极材料的MFC在启动初期的最大功率密度为4. 7 m W/m^2,内阻为1 782Ω;采用碳纸电极材料的MFC在启动初期的最大功率密度为8. 5 m W/m^2,内阻为1 125Ω,且驯化结束后稳定期的电压(313 m V)比碳布电极材料的MFC(282 m V)高,故MFC电极材料采用碳纸的产电效果优于碳布。展开更多
文摘The urgent demand for portable electronics has promoted the development of high-efficienc）9 sustainable, and even stretchable self-charging power sources. In this work, we propose a flexible self-charging power unit based on folded carbon （FC） paper for harvesting mechanical energy from human motion and power portable electronics. The present unit mainly consists of a triboelectric nanogenerator （FC-TENG） and a supercapacitor （FC-SC）, both based on folded carbon paper, as energy harvester and storage device, respectively. This favorable geometric design provides the high Young＇s modulus carbon paper with excellent stretchability and enables the power unit to work even under severe deformations, such as bending, twisting, and rolling. In addition, the tensile strain can be maximized by tuning the folding angle of the triangle-folded carbon paper. Moreover, the waterproof property of the packaged device make it washable, protect it from human sweat, and enable it to work in harsh environments. Finally, the as-prepared self-charging power unit was tested by placing it on the human body to harvest mechanical energy from hand tapping, foot treading, and arm touching, successfully powering an electronic watch. This work demonstrates the impressive potential of stretchable self-charging power units, which will further promote the development of high Young＇s modulus materials for wearable/portable electronics.
文摘以厌氧污泥为接种微生物构建H型双室微生物燃料电池,考察不同电极材料(碳纸和碳布)对微生物燃料电池(MFC)产电性能的影响。结果表明,采用碳布为电极材料的MFC启动更快,18 h达到稳定,但在稳定期采用碳纸为电极材料比采用碳布为电极材料的MFC电压高出20 m V左右。采用碳布电极材料的MFC在启动初期的最大功率密度为4. 7 m W/m^2,内阻为1 782Ω;采用碳纸电极材料的MFC在启动初期的最大功率密度为8. 5 m W/m^2,内阻为1 125Ω,且驯化结束后稳定期的电压(313 m V)比碳布电极材料的MFC(282 m V)高,故MFC电极材料采用碳纸的产电效果优于碳布。
