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一种用于锂离子电池的聚乙二醇化壳聚糖凝胶聚合物电解质。

A PEGylated Chitosan as Gel Polymer Electrolyte for Lithium Ion Batteries.

作者信息

Wang Anqi, Tu Yue, Wang Sijie, Zhang Hongbing, Yu Feng, Chen Yong, Li De

机构信息

State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources, Hainan University, Haikou 570228, China.

Guangdong Key Laboratory for Hydrogen Energy Technologies, School of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, China.

出版信息

Polymers (Basel). 2022 Oct 27;14(21):4552. doi: 10.3390/polym14214552.

DOI:10.3390/polym14214552
PMID:36365545
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9657041/
Abstract

Due to their safety and sustainability, polysaccharides such as cellulose and chitosan have great potential to be the matrix of gel polymer electrolytes (GPE) for lithium-based batteries. However, they easily form hydrogels due to the large numbers of hydrophilic hydroxyl or amino functional groups within their macromolecules. Therefore, a polysaccharide-based amphiphilic gel, or organogel, is urgently necessary to satisfy the anhydrous requirement of lithium ion batteries. In this study, a PEGylated chitosan was initially designed using a chemical grafting method to make an GPE for lithium ion batteries. The significantly improved affinity of PEGylated chitosan to organic liquid electrolyte makes chitosan as a GPE for lithium ion batteries possible. A reasonable ionic conductivity (1.12 × 10 S cm) and high lithium ion transport number (0.816) at room temperature were obtained by replacing commercial battery separator with PEG-grafted chitosan gel film. The assembled Li/GPE/LiFePO coin cell also displayed a high initial discharge capacity of 150.8 mA h g. The PEGylated chitosan-based GPE exhibits great potential in the field of energy storage.

摘要

由于其安全性和可持续性，纤维素和壳聚糖等多糖具有成为锂基电池凝胶聚合物电解质（GPE）基质的巨大潜力。然而，由于其大分子中存在大量亲水性羟基或氨基官能团，它们很容易形成水凝胶。因此，迫切需要一种基于多糖的两亲性凝胶或有机凝胶来满足锂离子电池的无水要求。在本研究中，最初采用化学接枝方法设计了一种聚乙二醇化壳聚糖，以制备用于锂离子电池的GPE。聚乙二醇化壳聚糖对有机液体电解质亲和力的显著提高使得壳聚糖作为锂离子电池的GPE成为可能。通过用聚乙二醇接枝的壳聚糖凝胶膜替代商用电池隔膜，在室温下获得了合理的离子电导率（1.12×10 S cm）和高锂离子迁移数（0.816）。组装的Li/GPE/LiFePO硬币电池也显示出150.8 mA h g的高初始放电容量。聚乙二醇化壳聚糖基GPE在储能领域展现出巨大潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b70/9657041/ce3ac2041d5f/polymers-14-04552-g009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b70/9657041/8cdb85232e77/polymers-14-04552-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b70/9657041/a47012c5012e/polymers-14-04552-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b70/9657041/c1604e8555c8/polymers-14-04552-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b70/9657041/47ddd51514fb/polymers-14-04552-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b70/9657041/da4e11b9ec74/polymers-14-04552-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b70/9657041/82784f375f62/polymers-14-04552-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b70/9657041/849115e88a27/polymers-14-04552-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b70/9657041/4cb1a6ab0b0d/polymers-14-04552-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b70/9657041/5650bd3cd6cc/polymers-14-04552-sch002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b70/9657041/ce3ac2041d5f/polymers-14-04552-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b70/9657041/be7b73b1e70f/polymers-14-04552-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b70/9657041/8cdb85232e77/polymers-14-04552-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b70/9657041/a47012c5012e/polymers-14-04552-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b70/9657041/c1604e8555c8/polymers-14-04552-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b70/9657041/47ddd51514fb/polymers-14-04552-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b70/9657041/da4e11b9ec74/polymers-14-04552-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b70/9657041/82784f375f62/polymers-14-04552-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b70/9657041/849115e88a27/polymers-14-04552-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b70/9657041/4cb1a6ab0b0d/polymers-14-04552-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b70/9657041/5650bd3cd6cc/polymers-14-04552-sch002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b70/9657041/ce3ac2041d5f/polymers-14-04552-g009.jpg

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