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用于LTO电池电极的海藻酸钠水溶液浆料的流变特性

Rheological Properties of Aqueous Sodium Alginate Slurries for LTO Battery Electrodes.

作者信息

Toigo Christina, Kracalik Milan, Bradt Elke, Pettinger Karl-Heinz, Arbizzani Catia

机构信息

Department of Chemistry Giacomo Ciamician, Alma Mater Studiorum Universitá di Bologna, 40126 Bologna, Italy.

Institute for Polymer Science, Johannes Kepler University Linz, 4040 Linz, Austria.

出版信息

Polymers (Basel). 2021 Oct 17;13(20):3582. doi: 10.3390/polym13203582.

DOI:10.3390/polym13203582
PMID:34685341
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8538868/
Abstract

Rheological properties of electrode slurries have been intensively studied for manifold different combinations of active materials and binders. Standardly, solvent-based systems are under use, but a trend towards water-based electrode manufacturing is becoming more and more important. The different solvent is beneficial in terms of sustainability and process safety but is also accompanied by some disadvantages such as extraction of residual humidity and a higher complexity concerning slurry stability. LiTiO (LTO) active material provides good long-term stability and can be processed in aqueous solutions. Combining the LTO active material with sodium alginate (SA) as a promising biobased polymer binder reveals good electrochemical properties but suffers from bad slurry stability. In this work, we present a comprehensive rheological study on material interactions in anode slurries consisting of LTO and SA, based on a complex interaction of differentially sized materials. The use of two different surfactants-namely, an anionic and non-ionic one, to enhance slurry stability, compared with surfactant-free slurry.

摘要

针对活性材料和粘合剂的多种不同组合，人们对电极浆料的流变特性进行了深入研究。标准情况下使用的是溶剂基体系，但水基电极制造的趋势正变得越来越重要。不同的溶剂在可持续性和工艺安全性方面具有优势，但也伴随着一些缺点，如残留湿度的萃取以及浆料稳定性方面更高的复杂性。LiTiO（LTO）活性材料具有良好的长期稳定性，并且可以在水溶液中进行加工。将LTO活性材料与作为一种有前景的生物基聚合物粘合剂的海藻酸钠（SA）相结合，展现出良好的电化学性能，但浆料稳定性较差。在这项工作中，基于不同尺寸材料的复杂相互作用，我们对由LTO和SA组成的阳极浆料中的材料相互作用进行了全面的流变学研究。与无表面活性剂的浆料相比 使用两种不同的表面活性剂，即一种阴离子表面活性剂和一种非离子表面活性剂，以提高浆料稳定性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2dde/8538868/43f2242a8262/polymers-13-03582-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2dde/8538868/fdcbaf79f96a/polymers-13-03582-g008.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2dde/8538868/b0785ace4ffc/polymers-13-03582-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2dde/8538868/43f2242a8262/polymers-13-03582-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2dde/8538868/bfe9ddeb6c67/polymers-13-03582-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2dde/8538868/17bf4d04c0a9/polymers-13-03582-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2dde/8538868/5a8b82ac8c22/polymers-13-03582-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2dde/8538868/af531f7bbd4c/polymers-13-03582-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2dde/8538868/f18e0d49d580/polymers-13-03582-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2dde/8538868/33bff2493835/polymers-13-03582-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2dde/8538868/a4a8691adb85/polymers-13-03582-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2dde/8538868/fdcbaf79f96a/polymers-13-03582-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2dde/8538868/367329e4c3df/polymers-13-03582-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2dde/8538868/68bd47cc6361/polymers-13-03582-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2dde/8538868/b0785ace4ffc/polymers-13-03582-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2dde/8538868/43f2242a8262/polymers-13-03582-g012.jpg

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Electrospinning Highly Concentrated Sodium Alginate Nanofibres without Surfactants by Adding Fluorescent Carbon Dots.
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