Research progress of wood for hydrovoltaic generation
The excessive use of fossil energy has brought about energy depletion and environmental degradation,and green sustainability has become the primary goal of national development.Energy production from clean sources is at-tractive for sustainable electric power generation.As one of the clean energy sources,water has become increasing uti-lization due to the massive amount of clean energy resource.Waterpower generation utilizes the hydro-voltaic effect,which is the generation of an electrical potential at the interphase of water and polarizable materials,being established through sea/river waves,water evaporation,droplets,etc.Wood can be a porous media for passing through,being assisted by evaporation,streaming current and hydro-voltage due to the presence of an electric double layer at the solid-liquid interface.Based on this mechanism,there have been various technologies,which have been explored to produce energy.In recent years,hydro-voltaic electricity generation has received extensive attention by numerous re-searchers in the world,which is considered to be a new means of deep excavation of hydropower resources.Resear-chers have achieved a series of research results on the interaction of functional materials with water droplets,water waves,water evaporation and moisture to output electricity.The development of biomass-based hydro-voltaic electrici-ty generation materials contributed to promote the full utilization of renewable energy.Wood is an abundant,rene-wable,and easily processing material with a unique hierarchical porous structure,rich in internal polar groups and good mechanical strength,presenting a promising application in the field of hydro-voltaic electricity generation.There-fore,wood has a certain application prospect in the field of hydro-voltaic electricity generation.This study summarized the research progress of hydro-voltaic electricity generation technology,expounded the theoretical basis of hydro-vol-taic electricity generation,the energy conversion methods based on hydro-voltaic effect,and the selection of device materials.The research results of wood as a material for hydro-voltaic electricity generation devices were introduced.In order to improve the output power of hydro-voltaic electricity generation devices,the functional modification methods of wood surface modification,pore regulation,material loading,and carbonization treatment were summarized,and their challenges and application prospects were prospected.
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