Fig. 1: Design, performance, and concept of PCNH-MEG.
From: Cellulose hydrogel with in-situ confined nanopores for boosting moist-electric conversion
PCNH and MEG are defined as delignified pomelo peel-confined carboxymethyl cellulose (CMC) nanofluidic hydrogel and moist-electric generator, respectively. A Schematic illustration of the preparation process and nanopore structure of PCNH, which exhibits better cation selectivity owing to the stronger double electric layer (EDL) overlap induced by sub-Debye length nanopores. The figure on the right represents the overlapping thickness of the EDL (consisting of the stern layer and the diffusion layer), also known as the Debye length. B The structure of a PCNH-MEG unit with asymmetric-moisture penetration layers. C A continuous open-circuit voltage (Voc) of a PCNH-MEG unit. Inset is a comparison of Voc with conventional CMC hydrogels. Data represents the mean ± standard deviation (n = 3). D A comprehensive comparison between this work and other reported MEGs based on the active electrode in terms of Voc, short-circuit current density (Jsc), integrated voltage, cost level, and eco-friendliness (EF). The cost level and EF are distinguished by the size and color of the dots respectively. E Schematic diagram of air purification system enabled by the moisture-driven NAI generator (MDNG) powered by integrated PCNH-MEGs. NAI refers to the negative air ion.
