A Biodegradable Gel Polymer Electrolyte Based on Polydopamine-Modified Tough Polyurethane Enabling High-Rate Sodium Batteries

IF 7.3 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Yan Zhang, Huihui Yuan, Lei Shi, Hongjian Lai, Xiangwei Wu* and Zhaoyin Wen*, 
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Abstract

A biodegradable gel polymer electrolyte based on biodegradable polyurethane (PU) coated polydopamine (PDA) was synthesized through a low-cost and simple phase inversion method for developing high-performance sodium batteries. The PU polymer substrate possesses satisfactory tensile strength and brilliant elasticity benefited from a rigid–flexible bifunctional structure, which can resist the deformation and penetration induced by the sodium dendrite. In the meantime, the ion transference number of the gel polymer electrolyte can reach up to 0.70 due to dissociation of sodium salts by polar groups on PDA@PU. Moreover, the PDA coating layer can provide higher surface energy and conjugate effect on the liquid electrolyte to construct an unblocked sodium ion transfer channel, avoid leakage risk of liquid electrolyte, and reduce side reactions at the interface. Benefiting from the synergistic effect of the PU substrate and the PDA coating layer, the gel polymer electrolyte enabled sodium battery with Na3V2(PO4)3 (NVP) cathode shows a capacity retention as high as 84% after 1000 cycles at 2 C. This work demonstrates that the synthesized gel polymer electrolyte has a surprising prospect for practical application to guarantee the high toughness and fast ion conduction simultaneously required at relatively high charge–discharge rate.

Abstract Image

Abstract Image

一种基于聚多巴胺改性韧性聚氨酯的可生物降解凝胶聚合物电解质,可用于制造高倍率钠电池
通过一种低成本、简单的相反转方法,合成了一种基于可生物降解聚氨酯(PU)包覆聚多巴胺(PDA)的可生物降解凝胶聚合物电解质,用于开发高性能钠电池。该聚氨酯聚合物基底具有令人满意的拉伸强度和出色的弹性,这得益于其刚柔相济的双功能结构,可抵抗钠树枝状突起引起的变形和渗透。同时,由于 PDA@PU 上的极性基团解离了钠盐,凝胶聚合物电解质的离子转移数可高达 0.70。此外,PDA 涂层还能提供更高的表面能,并对液体电解质产生共轭作用,从而构建畅通无阻的钠离子传输通道,避免液体电解质的泄漏风险,并减少界面副反应。得益于聚氨酯基底和 PDA 涂层的协同作用,凝胶聚合物电解质使 Na3V2(PO4)3 (NVP) 正极钠电池在 2 C 下循环 1000 次后,容量保持率高达 84%。
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来源期刊
ACS Sustainable Chemistry & Engineering
ACS Sustainable Chemistry & Engineering CHEMISTRY, MULTIDISCIPLINARY-ENGINEERING, CHEMICAL
CiteScore
13.80
自引率
4.80%
发文量
1470
审稿时长
1.7 months
期刊介绍: ACS Sustainable Chemistry & Engineering is a prestigious weekly peer-reviewed scientific journal published by the American Chemical Society. Dedicated to advancing the principles of green chemistry and green engineering, it covers a wide array of research topics including green chemistry, green engineering, biomass, alternative energy, and life cycle assessment. The journal welcomes submissions in various formats, including Letters, Articles, Features, and Perspectives (Reviews), that address the challenges of sustainability in the chemical enterprise and contribute to the advancement of sustainable practices. Join us in shaping the future of sustainable chemistry and engineering.
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