Direct conversion of the tremendous and ubiquitous low-grade thermal energy into electricity by thermogalvanic cells is a promising strategy for energy harvesting.The environment is one of the richest and renewable lo...Direct conversion of the tremendous and ubiquitous low-grade thermal energy into electricity by thermogalvanic cells is a promising strategy for energy harvesting.The environment is one of the richest and renewable low-grade thermal source.However,critical challenges remain for all-day electricity generation from environmental thermal energy due to the low frequency and small amplitude of temperature fluctuations in the environment.In this work,we report a tandem device consisting of a polypyrrole(PPy)broadband absorber/radiator,thermogalvanic cell,and thermal storage material(Cu foam/PEG1000)that integrates multiple functions of heating,cooling,and recycling of thermal energy.The thermogalvanic cell enables continuous utilization of environmental thermal energy at both daytime and nighttime,yielding maximum outputs as high as 0.6 W m^(-2) and 53 mW m^(-2),respectively.As demonstrated outdoors by a large-scale prototype module,this design offers a feasible and promising approach to all-day electricity generation from environmental thermal energy.展开更多
Appropriate polarization utilization makes the electric field vector direction and the statistically oriented localized states suitable for enhancing light-matter interactions so as to improve the efficiency of ultraf...Appropriate polarization utilization makes the electric field vector direction and the statistically oriented localized states suitable for enhancing light-matter interactions so as to improve the efficiency of ultrafast laser writing,which will remarkably reduce the pulse energy and increase the processing speed for high density optical data storage,as well as manufacturing three-dimensional integrated optics and geometric phase optical elements.展开更多
基金This work was financially supported by the National Natural Science Foundation of China(grants 51872101,51672097,and 61434001)the National Program for Support of TopNotch Young Professionals,the programme for HUST Academic Frontier Youth Team(2017QYTD11)+2 种基金the China Postdoctoral Science Foundation(2017M61048 and 2018T110758)the Fundamental Research Funds for the Central Universities(HUST:2015MS004 and 2018KFYXKJC025)The authors thank the Center for Nanoscale Characterization&Devices,WNLO-HUST,and the Analysis and Testing Center of Huazhong University of Science and Technology for their support.
文摘Direct conversion of the tremendous and ubiquitous low-grade thermal energy into electricity by thermogalvanic cells is a promising strategy for energy harvesting.The environment is one of the richest and renewable low-grade thermal source.However,critical challenges remain for all-day electricity generation from environmental thermal energy due to the low frequency and small amplitude of temperature fluctuations in the environment.In this work,we report a tandem device consisting of a polypyrrole(PPy)broadband absorber/radiator,thermogalvanic cell,and thermal storage material(Cu foam/PEG1000)that integrates multiple functions of heating,cooling,and recycling of thermal energy.The thermogalvanic cell enables continuous utilization of environmental thermal energy at both daytime and nighttime,yielding maximum outputs as high as 0.6 W m^(-2) and 53 mW m^(-2),respectively.As demonstrated outdoors by a large-scale prototype module,this design offers a feasible and promising approach to all-day electricity generation from environmental thermal energy.
文摘Appropriate polarization utilization makes the electric field vector direction and the statistically oriented localized states suitable for enhancing light-matter interactions so as to improve the efficiency of ultrafast laser writing,which will remarkably reduce the pulse energy and increase the processing speed for high density optical data storage,as well as manufacturing three-dimensional integrated optics and geometric phase optical elements.
