Feng GONG, Jiaming SONG, Haotian CHEN, et al. A fibrous hydroelectric generator derived from eco-friendly sodium alginate for low-grade energy harvesting. p 474-482
Harvesting irregular and ubiquitous low-grade energy in daily life represents a cutting-edge approach to mitigating fossil fuel depletion and environmental pollution. It also holds great potential for advancing the development of the Internet of Things. Electricity generation via material-water interaction shows promise for driving wearable electronics, owing to abundant sources of water such as flowing water, the human body, and the humidity. However, the insufficient power density, unfavorable configuration for wearable application, and non-degradable composition of existing generators may hinder their practical applications. To address these issues, we have developed a biomass fiber-based electricity generator from sodium alginate, cellulose nanofibers, and graphene oxide, which provides extensive functional groups for interaction with water molecules, thereby facilitating efficient power generation. The base materials are derived from nature, enabling degradable power generators. The one-dimensional power generator is easier to incorporate with fabrics, which is favorable for designing wearable electronic systems. By partially dipping LiCl, the fiber can absorb moisture from the human body or atmosphere for continuous power supply. This work may provide insights for designing wearable power generators and developing next generation of biomass-water-energy nexus.
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