PTCDA/ cu阴极实现稳定的硫化物基全固态电池

IF 9.6 1区 材料科学 Q1 CHEMISTRY, PHYSICAL
Zhixing Wan, Shuo Wang, Yahao Mu, Ruihua Zhou, Hang Liu, Tingwu Jin, Di Wu, Jianlong Xia, Ce-Wen Nan
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引用次数: 0

摘要

有机正极材料具有重量轻、结构可调、能量密度高、环境友好等优点,在锂离子电池中具有广泛的应用前景。然而,有机阴极在液体电解质中的溶解往往导致循环稳定性差,这限制了它们的实际应用。本研究将PTCDA/CuS(苝-3,4,9,10-四羧酸二酐,PTCDA)与硫化物基电解质和碳纳米管进行球磨制备复合阴极。在33.0 mA/g电流密度下,经过200次循环后,组装的全固态电池(assb)的放电容量达到210 mA⸱h/g,且电池容量没有下降。通过x射线衍射(XRD)、拉曼光谱(Raman)、傅里叶变换红外光谱(FTIR)、x射线光电子能谱(XPS)等综合表征技术,阐明了充放电过程中Cu2+的配位和硫链聚合物的形成,并证实了电化学反应的可逆性。这项工作突出了有机阴极与硫化物基电解质之间的良好相容性,为开发高能量密度和延长寿命的高性能assb提供了新的途径。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

PTCDA/CuS cathode enabling stable sulfide-based all-solid-state batteries

PTCDA/CuS cathode enabling stable sulfide-based all-solid-state batteries
Organic cathode materials have garnered significant attention for their potential application in lithium-ion batteries due to their lightweight nature, tunable structures, high energy density, and environmental friendliness. However, the dissolution of organic cathodes in liquid electrolytes often leads to poor cycling stability, which limits their practical application. In this study, a composite cathode was prepared by ball milling the PTCDA/CuS (perylene-3,4,9,10-tetracarboxylic dianhydride, PTCDA) with a sulfide-based electrolyte and carbon nanotubes. By optimizing the component ratios, the assembled all-solid-state batteries (ASSBs) show a high discharge capacity of 210 mA⸱h/g after 200 cycles without any capacity degradation at a current density of 33.0 mA/g. Through comprehensive characterization techniques including X-ray diffraction (XRD), Raman spectroscopy, Fourier-transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS), the coordination of Cu2+ and the formation of sulfur-linked polymers during the charge-discharge processes are elucidated, and the reversibility of the electrochemical reactions has been confirmed. This work highlights the excellent compatibility between organic cathodes and sulfide-based electrolytes, providing a new way for the development of high-performance ASSBs with high energy density and extended lifespan.
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来源期刊
Journal of Materiomics
Journal of Materiomics Materials Science-Metals and Alloys
CiteScore
14.30
自引率
6.40%
发文量
331
审稿时长
37 days
期刊介绍: The Journal of Materiomics is a peer-reviewed open-access journal that aims to serve as a forum for the continuous dissemination of research within the field of materials science. It particularly emphasizes systematic studies on the relationships between composition, processing, structure, property, and performance of advanced materials. The journal is supported by the Chinese Ceramic Society and is indexed in SCIE and Scopus. It is commonly referred to as J Materiomics.
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