Hygroscopic and moisture-stable cellulose nanofiber aerogel for effective and repeatable moisture-enabled electricity generation

Zhu, Luting; Li, Xiang; Huang, Yintong et al.

Chemical Engineering Journal, 2025, 511, 162246

Number of Access:238（2025-08-14 02:42 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/101392

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Title
Hygroscopic and moisture-stable cellulose nanofiber aerogel for effective and repeatable moisture-enabled electricity generation
Creator
CreatorName
Zhu, Luting
CreatorName
Li, Xiang
CreatorName
Huang, Yintong
researchmap permalink
ShunIshioka ShunIshioka
CreatorName
Ishioka, Shun
NRID
1000040915584 1000040915584
researchmap permalink
tkasuga tkasuga
CreatorName
Kasuga, Takaaki
NRID
1000030634539 1000030634539
ORCID
0000-0001-6295-1731 0000-0001-6295-1731
researchmap permalink
hkoga hkoga
Scopus Author ID
7201439917 7201439917
CreatorName
Koga, Hirotaka
Subject
Cellulose nanofiber aerogel
Al(III) loading
Moisture absorption
Moisture stability
Moisture-enabled electricity generation
Description
Zhu L., Li X., Huang Y., et al. Hygroscopic and moisture-stable cellulose nanofiber aerogel for effective and repeatable moisture-enabled electricity generation. Chemical Engineering Journal 511, 162246 (2025); https://doi.org/10.1016/j.cej.2025.162246.
Abstract
Cellulose nanofiber (CNF) aerogels with anisotropic porous channels have shown promise for various applications because of their ultralow density, efficient moisture transport, and sustainability. Moisture-enabled electricity generation (MEG) using CNF aerogels is of particular interest in the field of energy harvesting using sustainable materials. However, hydrophilic CNF aerogels collapse their porous channel structures under high-humidity conditions by disrupting the interfiber hydrogen bonds, thus hindering their repeated use in MEG. Although the hydrophobic treatment of CNF aerogels can improve their structural stability against moisture, this treatment hinders their moisture absorption and affects the MEG performance. Herein, we propose the loading of Al(III) into a CNF aerogel to enhance its moisture absorption and stability simultaneously. The introduction of deliquescent AlCl₃·6H₂O crystals and Al³⁺ crosslinking into the aerogel enhances its moisture absorption and stability, respectively. The enhanced moisture absorption significantly increased the MEG performance of the aerogel under high-humidity conditions. In addition, the improved moisture stability allows the repeated use of the aerogel, even after exposure to moist airflow and subsequent drying. The Al(III)-loaded CNF aerogel with an active electrode system exhibited enhanced and repeatable MEG performances under exposure to moist airflow with maximum open-circuit voltage, short-circuit current density, and power density of 950 mV, 112.9 μA cm⁻², and 106.1 μW cm⁻², respectively. This study provides a method for producing effective and repeatable MEG and boosts the stability of CNF aerogels for various applications.
Publisher
Elsevier B.V.
Source Title
Chemical Engineering Journal
Volume (Issue)
511
Page
162246
Date of Issued
2025-04-05
Language
English
Handle URL
https://hdl.handle.net/11094/101392
PISSN
13858947
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1016/j.cej.2025.162246
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution 4.0 International License.
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article