The p-n-type PANI/ZnS heterostructure utilizing quantum dot network to achieve low-overpotential photo-assisted lithium–oxygen battery

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals Pub Date : 2025-02-25 DOI:10.1007/s12598-024-03134-5

Shuang-Hong Xia, Yang Yang, Ran-Ran Zhang, Ling Li, Song Chen, Wen-Ming Zhang

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引用次数: 0

Abstract

The lithium-oxygen battery (LOB) is a promising source of green energy due to its energy density. However, the development of this technology is limited by the insoluble discharge product it produces. In this work, a cathode material with a p-n heterostructure of polyaniline (PANI)/ZnS is prepared to trap visible light, utilizing a ZnS quantum dot (ZnS QD) network to form a large number of photogenerated electron–hole pairs, thus promoting the generation and decomposition of Li₂O₂. The prepared PANI/ZnS has an ultra-low overpotential of 0.06 V under illumination. Furthermore, density functional theory theoretical calculation has demonstrated the ability of the heterostructures to adsorb oxygen-containing intermediates, which not only facilitates the growth of Li₂O₂, but also reduces the reaction energy required to decompose Li₂O₂. The present work provides a solution to the problem of insolubility of discharge products in photo-assisted LOB.

Graphical abstract

查看原文本刊更多论文

利用量子点网络实现低过电位光辅助锂氧电池的p-n型PANI/ZnS异质结构

锂氧电池（LOB）由于其能量密度高，是一种很有前途的绿色能源。然而，该技术的发展受到其产生的不溶性放电产物的限制。本文制备了聚苯胺(PANI)/ZnS的p-n异质结构正极材料，利用ZnS量子点（ZnS QD）网络形成大量光生电子空穴对，从而促进Li2O2的生成和分解。制备的PANI/ZnS在光照下具有0.06 V的超低过电位。此外，密度泛函理论计算证明了异质结构对含氧中间体的吸附能力，这不仅有利于Li2O2的生长，而且降低了分解Li2O2所需的反应能。本研究为解决光辅助LOB中放电产物的不溶性问题提供了一种方法。图形抽象

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

Rare Metals 工程技术-材料科学：综合

CiteScore

12.10

自引率

12.50%

发文量

2919

审稿时长

2.7 months

期刊介绍： Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.