Synergistic “Anchor-Capture” Enabled by Amino and Carboxyl for Constructing Robust Interface of Zn Anode

IF 31.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Nano-Micro Letters Pub Date : 2023-08-28 DOI:10.1007/s40820-023-01171-w

Zhen Luo, Yufan Xia, Shuang Chen, Xingxing Wu, Ran Zeng, Xuan Zhang, Hongge Pan, Mi Yan, Tingting Shi, Kai Tao, Ben Bin Xu, Yinzhu Jiang

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Abstract

Highlights

The synergistic “anchor-capture” mechanism of polar groups on Zn stripping/plating process is firstly proposed.
The amino group firmly anchors on Zn surface and the carboxyl group strongly captures Zn²⁺, constructing a robust anode–electrolyte interface and inducing uniform Zn deposition.
The ultra-stable cycle lifespan of Zn–Zn symmetric cell (over 2800 h) and high utilization rate of Zn anode (the depth of discharge up to 68% for 200 h) are achieved under the proposal of synergistic “anchor-capture.”

Abstract Image

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氨基和羧基协同“锚捕获”构建锌阳极坚固界面。

水溶液锌离子电池(AZIBs)已被公认为是最具应用前景的电池之一，但锌阳极-电解质界面的不稳定性极大地制约了其进一步发展。在这里，我们利用氨基酸甘氨酸(Gly)作为电解质添加剂来稳定锌阳极-电解质界面。这种独特的界面化学是由Gly分子中极性基团的协同“锚-捕获”效应促成的，表现为同时偶联氨基在Zn阳极表面锚定，羧基在局部区域捕获Zn2+。因此，这种坚固的阳极-电解质界面抑制了Zn2+的无序迁移，并有效地抑制了副反应和枝晶的生长。在1 mA cm-2和0.5 mAh cm-2循环500次后，锌阳极的可逆性显著提高，平均库仑效率达到99.22%。在高锌利用率(放电深度，DODZn)为68%的情况下，超薄锌箔(20 μm)的稳定循环寿命可达200 h。Zn- mno2电池优异的倍率性能和长期循环稳定性进一步证明了Gly在稳定Zn阳极方面的有效性。这项工作从azib的极性基团的具体作用揭示了增材设计。

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来源期刊

Nano-Micro Letters NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

42.40

自引率

4.90%

发文量

715

审稿时长

13 weeks

期刊介绍： Nano-Micro Letters is a peer-reviewed, international, interdisciplinary and open-access journal that focus on science, experiments, engineering, technologies and applications of nano- or microscale structure and system in physics, chemistry, biology, material science, pharmacy and their expanding interfaces with at least one dimension ranging from a few sub-nanometers to a few hundreds of micrometers. Especially, emphasize the bottom-up approach in the length scale from nano to micro since the key for nanotechnology to reach industrial applications is to assemble, to modify, and to control nanostructure in micro scale. The aim is to provide a publishing platform crossing the boundaries, from nano to micro, and from science to technologies.