锂-铟全固态电池中阿基洛德电解质的稳定性

IF 5.5 3区 材料科学 Q2 CHEMISTRY, PHYSICAL
Di Huang, Gao Liu and Wei Tong*, 
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引用次数: 0

摘要

锂-铟合金在全固态全电池中被广泛用作工作阳极。铟的加入可以抑制固体电解质的分解,从而有助于稳定界面。然而,锂-铟相图非常复杂,根据成分的不同,涉及多个相。了解锂-铟成分与电化学性能之间的关系以及找出电池失效的根本原因,对于推动这项技术的发展至关重要。在此,我们对全固态电池中锂辉石电解质界面稳定性的影响进行了压缩分析。由 LiIn 和 In 相组成的 Li0.5In 合金显著提高了界面稳定性。相反,当使用 Lii-In 或 Li 金属阳极时,我们观察到固态电解质中积累了大量的 Li 沉淀,以及由 Li2S 构成的厚界面,从而导致循环寿命缩短。Li0.5In 阳极可实现 2.0 mA cm-2 的高临界电流密度,并可在 0.5 mA cm-2 下延长循环 1000 小时。此外,在 LiCoO2|Li6PS5Cl|Li0.5In 全电池中,经过 700 次循环,可获得 120 mAh g-1 的可逆容量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Stability of the Argyrodite Electrolyte in Li–In Based All-Solid-State Batteries

Stability of the Argyrodite Electrolyte in Li–In Based All-Solid-State Batteries

Li–In alloy has been largely used as a working anode in all-solid-state full cells. Incorporating indium can help stabilize the interface by suppressing the decomposition of the solid electrolyte. However, the Li–In phase diagram is complex and involves multiple phases depending on the composition. Understanding the relationship between the Li–In composition and electrochemical performance as well as identifying the root causes of cell failure is crucial for advancing this technology. Here, we present a compressive analysis of the impact of the Li–In composition on the interfacial stability of the argyrodite electrolyte in all-solid-state batteries. The Li0.5In alloy, composed of LiIn and In phases, significantly improves the interfacial stability. In contrast, when using the Li–In or Li metal anode, we observe the accumulation of large Li deposits within the solid electrolyte as well as a thick interface composed of Li2S, leading to a shortened cycle life. The Li0.5In anode enables a high critical current density of 2.0 mA cm–2 and extends cycling for 1000 h at 0.5 mA cm–2. Additionally, a reversible capacity of 120 mAh g–1 is achieved over 700 cycles in the LiCoO2|Li6PS5Cl|Li0.5In full cell.

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来源期刊
ACS Applied Energy Materials
ACS Applied Energy Materials Materials Science-Materials Chemistry
CiteScore
10.30
自引率
6.20%
发文量
1368
期刊介绍: ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.
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