纳米工程
材料科学
功率密度
工程木材
多孔性
可再生能源
纤维素
化学工程
纳米技术
复合材料
功率(物理)
电气工程
物理
工程类
量子力学
作者
Jonas Garemark,Farsa Ram,Lianlian Liu,Ioanna Sapouna,Maria F. Cortes Ruiz,Per Tomas Larsson,Yuanyuan Li
标识
DOI:10.1002/adfm.202208933
摘要
Abstract Converting omnipresent environmental energy through the assistance of spontaneous water evaporation is an emerging technology for sustainable energy systems. Developing bio‐based hydrovoltaic materials further pushes the sustainability, where wood is a prospect due to its native hydrophilic and anisotropic structure. However, current wood‐based water evaporation‐assisted power generators are facing the challenge of low power density. Here, an efficient hydrovoltaic wood power generator is reported based on wood cell wall nanoengineering. A highly porous wood with cellulosic network filling the lumen is fabricated through a green, one‐step treatment using sodium hydroxide to maximize the wood surface area, introduce chemical functionality, and enhance the cell wall permeability of water. An open‐circuit potential of ≈140 mV in deionized water is realized, over ten times higher than native wood. Further tuning the pH difference between wood and water, due to an ion concentration gradient, a potential up to 1 V and a remarkable power output of 1.35 µW cm −2 is achieved. The findings in this study provide a new strategy for efficient wood power generators.
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