Alginate-Based Electrospun Nanofiber for Sustainable High Ionic Conductivity Lithium–Ion Battery Separator

IF 5.4 3区材料科学 Q2 CHEMISTRY, PHYSICAL

ACS Applied Energy Materials Pub Date : 2025-04-07 DOI:10.1021/acsaem.4c0222210.1021/acsaem.4c02222

Ahmad Miftahul Anwar, Faiq Haidar Hamid, Afriyanti Sumboja and Lia A. T. W. Asri*,

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引用次数: 0

Abstract

Commercial Li–ion battery separators made from polypropylene (PP) and polyethylene (PE) present sustainability issues with limited ionic conductivity. Alginate (Alg), a biobased polymer, offers sustainability by its natural abundance and biodegradability. It also offers ionic conductivity improvement through the presence of hydroxyl and carboxylate functional groups. In this study, we fabricate an Alg-based nanofiber separator using electrospinning to enhance the specific surface area of the separator, exposing more functional groups on the surface. The presence of Alg on the electrospun separator resulted in superior ionic conductivity of 2.65 and 5.97 mS cm^–1 for poly(vinyl alcohol) (PVA)-Alg20 and PVA-Alg40, respectively. Even further, PVA-Alg40 demonstrated excellent electrochemical stability and consistent Li plating/stripping performance for up to 1000 h. Additionally, in LFP/Li cells, the PVA-Alg40 separator maintained stable capacity (charging and discharging capacities stabilizing around 150 and 140 mAh g^–1) and high Coulombic efficiency (95–100%) over 140 cycles of charge–discharge test. This study highlights the potential of Alg-based separators as a sustainable and effective alternative to conventional separators in Li–ion batteries.

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海藻酸盐基静电纺纳米纤维用于可持续高离子电导率锂离子电池隔膜

由聚丙烯（PP）和聚乙烯（PE）制成的商用锂离子电池隔膜存在离子电导率有限的可持续性问题。海藻酸盐（Alg）是一种生物基聚合物，因其天然丰度和生物可降解性而具有可持续性。它还通过羟基和羧酸官能团的存在提供离子电导率的改善。在本研究中，我们利用静电纺丝技术制备了一种海藻基纳米纤维分离器，以提高分离器的比表面积，使其表面暴露出更多的官能团。Alg的存在使聚乙烯醇-Alg20和聚乙烯醇- alg40的离子电导率分别达到2.65和5.97 mS cm-1。此外，PVA-Alg40表现出优异的电化学稳定性和长达1000小时的锂电镀/剥离性能。此外，在LFP/Li电池中，PVA-Alg40分离器在140次充放电测试中保持稳定的容量（充放电容量稳定在150和140 mAh g-1左右）和高库仑效率（95-100%）。这项研究强调了钠基分离器作为锂离子电池中传统分离器的可持续和有效替代品的潜力。

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来源期刊

ACS Applied Energy Materials Materials Science-Materials Chemistry

CiteScore

10.30

自引率

6.20%

发文量

1368

期刊介绍： ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.