用于锂空气电池的高度稳定的金属卤化物钙钛矿微立方阳极

IF 5.4 Q2 CHEMISTRY, PHYSICAL Journal of Power Sources Advances Pub Date : 2020-06-01 DOI:10.1016/j.powera.2020.100015
Athanasia Kostopoulou , Dimitra Vernardou , Dimitra Makri , Konstantinos Brintakis , Kyriaki Savva , Emmanuel Stratakis
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引用次数: 17

摘要

金属卤化物钙钛矿最近被提出作为储能应用的有希望的材料。此外,这些材料非常重要的电化学特性是,所有钙钛矿基阳极都是在高温(90-150 °C)下合成的,反应持续时间为数十小时。在这项工作中,已经特别表明,直接生长无配体的全无机金属卤化物微晶体,为锂-空气电池提供了高性能和稳定的电极。我们描述了一种非常简单和快速的方法来合成结晶良好和超稳定的CsPbBr3微立方体,在环境和水条件下都具有突出的电化学性能。特别是,在锂离子插入和脱插的连续扫描过程中,基于微立方的阳极显示出高达549 mAh·g−1的高比容量和高达1500次循环的工作耐久性。钙钛矿电活性材料与电解质之间的大界面面积以及暴露的微立方体表面活性位的增加有利于锂离子的插层。研究结果表明,在目前用于锂空气电池的纳米和微颗粒卤化铅钙钛矿阳极中,本文提出的阳极具有最好的电化学特性。
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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Highly stable metal halide perovskite microcube anodes for lithium-air batteries

Metal halide perovskites have been recently proposed as hopeful materials for energy storage applications. Besides, the quite important electrochemical characteristics of these materials, all the perovskite-based anodes are synthesized at high temperatures (90–150 °C) and with reaction durations of the order of tens of hours. In this work, it has been particularly shown that the direct growth of all-inorganic, metal halide microcrystals free of ligands, provides high-performance and stable electrodes for Li-air batteries. We describe a very simple and rapid method to synthesize well-crystalline and ultra-stable, at both ambient and aqueous conditions, CsPbBr3 microcubes, exhibiting prominent electrochemical performance. In particular, it is shown that during the successive scans in which the Li-ions intercalate and deintercalate, the microcubes-based anodes showed a high specific capacity of 549 mAh·g−1 and operation durability up to 1500 cycles. The large interfacial area between the perovskite electroactive material and the electrolyte along with the increase of the active sites on the exposed microcubes facets favor the Li-ions intercalation. It is concluded that the anodes presented here demonstrate the best electrochemical features among the nano- and microparticulate lead halide perovskite anodes used for Li-air batteries, to date.

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来源期刊
CiteScore
9.10
自引率
0.00%
发文量
18
审稿时长
64 days
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