Enabling high-voltage stability and interface compatibility via Ta/Nb co-occupation in fluorinated Li-halide catholytes

IF 18.9 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Energy Storage Materials Pub Date : 2025-02-01 DOI:10.1016/j.ensm.2025.104062

Qiaoquan Lin , Xiumei Kang , Lin Li , Jingming Yao , Yue Chen , Xinlin Yan , Chuang Yu , Long Zhang , Zhigao Huang

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Abstract

Solid electrolytes (SEs) possessing high voltage stability, good compatibility with oxide active materials, and fast ion transport are essential to act as a catholyte in developing all-solid-state Li batteries (ASSLBs) with high energy density. Nonetheless, many of the reported SEs are hard to reach these targets simultaneously. In this work, we report a type of fluorinated Li-halides by adopting LiF instead of LiCl as raw material, with a ratio of LiF:Li₂O:Ta(Nb)Cl₅ fixing to 1:1:1 and variant Ta/Nb ratios. The co-occupation of Ta/Nb enables the fluorinated Li-halides to simultaneously reach the targets aforementioned. Moreover, a soft feature with small Young's modulus is observed. The ASSLBs assembled using the cathode with the optimized SE and bare single-crystal LiNi_0.88Co_0.09Mn_0.03O₂ (SCNCM88) demonstrate a high specific capacity and long-term cycling stability even at a cut-off voltage of 4.6 V. The intimate contact and superior interface stability inside the cathode are the origins for the superior electrochemical performance of the batteries. We also show the components we designed need only a short synthesis time (only 6 h).

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来源期刊

Energy Storage Materials Materials Science-General Materials Science

CiteScore

33.00

自引率

5.90%

发文量

652

审稿时长

27 days

期刊介绍： Energy Storage Materials is a global interdisciplinary journal dedicated to sharing scientific and technological advancements in materials and devices for advanced energy storage and related energy conversion, such as in metal-O2 batteries. The journal features comprehensive research articles, including full papers and short communications, as well as authoritative feature articles and reviews by leading experts in the field. Energy Storage Materials covers a wide range of topics, including the synthesis, fabrication, structure, properties, performance, and technological applications of energy storage materials. Additionally, the journal explores strategies, policies, and developments in the field of energy storage materials and devices for sustainable energy. Published papers are selected based on their scientific and technological significance, their ability to provide valuable new knowledge, and their relevance to the international research community.