Design of a cationic accelerator enabling ultrafast ion diffusion kinetics in aqueous zinc-ion batteries

IF 13.1 1区 化学 Q1 Energy Journal of Energy Chemistry Pub Date : 2024-09-11 DOI:10.1016/j.jechem.2024.09.002
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Abstract

Aqueous zinc-ion batteries are highly favored for grid-level energy storage owing to their low cost and high safety, but their practical application is limited by slow ion migration. To address this, a strategy has been developed to create a cation-accelerating electric field on the surface of the cathode to achieve ultrafast Zn2+ diffusion kinetics. By employing electrodeposition to coat MoS2 on the surface of BaV6O16·3H2O nanowires, the directional built-in electric field generated at the heterointerface acts as a cation accelerator, continuously accelerating Zn2+ diffusion into the active material. The optimized Zn2+ diffusion coefficient in CC@BaV6O16·3H2O@MoS2 (7.5 × 10−8 cm2 s−1) surpasses that of most reported V-based cathodes. Simultaneously, MoS2 serving as a cathodic armor extends the cycling life of the Zn-CC@BaV6O16·3H2O@MoS2 full batteries to over 10000 cycles. This work provides valuable insights into optimizing ion diffusion kinetics for high-performance energy storage devices.

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设计阳离子加速器,实现锌离子水电池中的超快离子扩散动力学
锌离子水电池因其低成本和高安全性而备受电网级储能技术的青睐,但其实际应用却因离子迁移缓慢而受到限制。为了解决这个问题,我们开发了一种策略,在阴极表面形成阳离子加速电场,以实现超快的 Zn2+ 扩散动力学。通过电沉积将 MoS2 涂覆在 BaV6O16-3H2O 纳米线表面,在异质表面产生的定向内置电场就像阳离子加速器一样,不断加速 Zn2+ 向活性材料的扩散。CC@BaV6O16-3H2O@MoS2 中优化的 Zn2+ 扩散系数(7.5 × 10-8 cm2 s-1)超过了大多数已报道的 V 基阴极。同时,作为阴极铠甲的 MoS2 将 Zn-CC@BaV6O16-3H2O@MoS2 全电池的循环寿命延长至 10000 次以上。这项研究为优化高性能储能设备的离子扩散动力学提供了宝贵的见解。
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来源期刊
Journal of Energy Chemistry
Journal of Energy Chemistry CHEMISTRY, APPLIED-CHEMISTRY, PHYSICAL
CiteScore
19.10
自引率
8.40%
发文量
3631
审稿时长
15 days
期刊介绍: The Journal of Energy Chemistry, the official publication of Science Press and the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, serves as a platform for reporting creative research and innovative applications in energy chemistry. It mainly reports on creative researches and innovative applications of chemical conversions of fossil energy, carbon dioxide, electrochemical energy and hydrogen energy, as well as the conversions of biomass and solar energy related with chemical issues to promote academic exchanges in the field of energy chemistry and to accelerate the exploration, research and development of energy science and technologies. This journal focuses on original research papers covering various topics within energy chemistry worldwide, including: Optimized utilization of fossil energy Hydrogen energy Conversion and storage of electrochemical energy Capture, storage, and chemical conversion of carbon dioxide Materials and nanotechnologies for energy conversion and storage Chemistry in biomass conversion Chemistry in the utilization of solar energy
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