Hygroscopic power generation performance of a new type of lithium-ion battery material based on lithium chloride-modified delignified wood and far-infrared paper

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Abstract

With the growing global demand for sustainable energy, the development of efficient and environmentally friendly energy conversion and storage materials has become a research hotspot. Paulownia wood, with its natural porous structure and good hygroscopicity, is considered a highly promising biomass material. However, its properties still need to be further optimized through pretreatment to meet specific application requirements. In this study, paulownia wood was chemically modified through delignification and lithium chloride (LiCl) compounding, and far-infrared paper was attached to its surface to enhance its hygroscopicity and electrochemical performance. These pretreatment methods not only increased the porosity of paulownia wood, but also significantly improved the ion transport capacity, thereby achieving excellent moisture absorption and power generation performance in a high humidity environment. Experimental results showed that the LiCl and delignified paulownia composite materials (DW@LiCl) material exhibited excellent electrochemical performance during the hygroscopic process: its current continuously increased with humidity, and the final voltage reached 0.494 V, which was significantly higher than that of other control groups. This modified paulownia wood material demonstrated significant application value in the field of hygroscopic power generation, such as directly generating electricity from ambient humidity, and it exhibits potential for the development of high-performance lithium-ion batteries.

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