用于可逆锌阳极的二维金属有机框架离子筛间相的原位生长

IF 13 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Jing Sun, Qinping Jian, Bin Liu, Pengzhu Lin, Tianshou Zhao
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引用次数: 0

摘要

锌金属阳极因其高度安全性、成本效益和高容量而在水电化学储能系统中越来越受欢迎。然而,锌金属阳极的使用寿命受到枝晶、水诱导的氢演化和钝化等关键挑战的严重制约。本研究采用新型凝胶气相沉积法在锌阳极表面原位构建了二维金属有机框架保护性相间层。超薄相间层(约 1 μm)由层层堆叠的二维纳米片组成,具有约 2.1 埃的埃级孔隙,可作为离子筛网阻挡大的溶剂离子对,同时均匀地传输部分脱溶的锌离子,有助于锌的均匀和高度可逆沉积。在相间层的屏蔽作用下,对称电池实现了超稳定的锌电镀/剥离,在 0.5 mA cm-2 下循环时间超过 1000 小时,在 1 mA cm-2 下循环时间约 700 小时,远远超过裸锌阳极的循环时间(250 小时和 70 小时)。此外,作为概念验证,与二氧化锰阴极配对的完整电池显示出更高的速率性能和稳定的循环(在 1 A g-1 下循环 1200 次)。这项研究为提高锌金属阳极性能的相间设计提供了新的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

In Situ Growth of 2D Metal–Organic Framework Ion Sieve Interphase for Reversible Zinc Anodes

In Situ Growth of 2D Metal–Organic Framework Ion Sieve Interphase for Reversible Zinc Anodes

In Situ Growth of 2D Metal–Organic Framework Ion Sieve Interphase for Reversible Zinc Anodes

Zinc metal anodes are gaining popularity in aqueous electrochemical energy storage systems for their high safety, cost-effectiveness, and high capacity. However, the service life of zinc metal anodes is severely constrained by critical challenges, including dendrites, water-induced hydrogen evolution, and passivation. In this study, a protective two-dimensional metal–organic framework interphase is in situ constructed on the zinc anode surface with a novel gel vapor deposition method. The ultrathin interphase layer (~1 μm) is made of layer-stacking 2D nanosheets with angstrom-level pores of around 2.1 Å, which serves as an ion sieve to reject large solvent–ion pairs while homogenizes the transport of partially desolvated zinc ions, contributing to a uniform and highly reversible zinc deposition. With the shielding of the interphase layer, an ultra-stable zinc plating/stripping is achieved in symmetric cells with cycling over 1000 h at 0.5 mA cm−2 and ~700 h at 1 mA cm−2, far exceeding that of the bare zinc anodes (250 and 70 h). Furthermore, as a proof-of-concept demonstration, the full cell paired with MnO2 cathode demonstrates improved rate performances and stable cycling (1200 cycles at 1 A g−1). This work provides fresh insights into interphase design to promote the performance of zinc metal anodes.

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来源期刊
Energy & Environmental Materials
Energy & Environmental Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
17.60
自引率
6.00%
发文量
66
期刊介绍: Energy & Environmental Materials (EEM) is an international journal published by Zhengzhou University in collaboration with John Wiley & Sons, Inc. The journal aims to publish high quality research related to materials for energy harvesting, conversion, storage, and transport, as well as for creating a cleaner environment. EEM welcomes research work of significant general interest that has a high impact on society-relevant technological advances. The scope of the journal is intentionally broad, recognizing the complexity of issues and challenges related to energy and environmental materials. Therefore, interdisciplinary work across basic science and engineering disciplines is particularly encouraged. The areas covered by the journal include, but are not limited to, materials and composites for photovoltaics and photoelectrochemistry, bioprocessing, batteries, fuel cells, supercapacitors, clean air, and devices with multifunctionality. The readership of the journal includes chemical, physical, biological, materials, and environmental scientists and engineers from academia, industry, and policy-making.
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