Constructing a lithiophilic polyaniline coating via in situ polymerization for dendrite-free lithium metal anode

IF 9.4 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Research Pub Date : 2023-02-06 DOI:10.1007/s12274-022-5370-7

Xiaosong Xiong, Qiao Qiao, Qi Zhou, Xinbing Cheng, Lili Liu, Lijun Fu, Yuhui Chen, Bin Wang, Xiongwei Wu, Yuping Wu

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引用次数: 4

Abstract

Metallic lithium is regarded as one of the most promising electrode materials to break through the energy density bottleneck of current commercial lithium-ion batteries. However, the practical implementation of lithium metal anode is limited by the unstable electrode interface significantly, which directly induces a low Coulombic efficiency, short cycling lifespan, and dendritic lithium growth behavior. In this study, via in situ electropolymerization, lithiophilic and conformal polyaniline layer is developed to improve the initial lithium nucleation and plating process, reducing the interface charge transfer resistance and promoting uniform lithium plating/stripping behavior. Meanwhile, the polyaniline layer exhibits good adhesion to the substrate. As a result, the Li/Cu half cell delivers a high Coulombic efficiency of 99.1% for 400 cycles at 1.0 mA·cm⁻² with polyaniline layer. In addition, long-term stable cycling at a current density of 1.0 mA·cm⁻² for 1300 h has been achieved for lithium metal anode. This strategy provides a new perspective for the practical lithium metal batteries.

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用原位聚合法制备无枝晶锂金属阳极的亲锂聚苯胺涂层

金属锂被认为是突破当前商用锂离子电池能量密度瓶颈最有前途的电极材料之一。然而，锂金属阳极的实际实施受到电极界面不稳定的显著限制，直接导致库仑效率低、循环寿命短和枝晶锂生长行为。本研究通过原位电聚合制备亲锂共形聚苯胺层，改善初始锂成核和镀过程，降低界面电荷转移阻力，促进均匀的锂镀/剥离行为。同时，聚苯胺层与衬底具有良好的附着力。结果表明，Li/Cu半电池在1.0 mA·cm−2条件下，具有聚苯胺层，可提供高达99.1%的库仑效率，循环400次。此外，锂金属阳极在1.0 mA·cm−2电流密度下实现了1300 h的长期稳定循环。该策略为锂金属电池的实用化提供了新的视角。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nano Research 化学-材料科学：综合

CiteScore

14.30

自引率

11.10%

发文量

2574

审稿时长

1.7 months

期刊介绍： Nano Research is a peer-reviewed, international and interdisciplinary research journal that focuses on all aspects of nanoscience and nanotechnology. It solicits submissions in various topical areas, from basic aspects of nanoscale materials to practical applications. The journal publishes articles on synthesis, characterization, and manipulation of nanomaterials; nanoscale physics, electrical transport, and quantum physics; scanning probe microscopy and spectroscopy; nanofluidics; nanosensors; nanoelectronics and molecular electronics; nano-optics, nano-optoelectronics, and nano-photonics; nanomagnetics; nanobiotechnology and nanomedicine; and nanoscale modeling and simulations. Nano Research offers readers a combination of authoritative and comprehensive Reviews, original cutting-edge research in Communication and Full Paper formats. The journal also prioritizes rapid review to ensure prompt publication.