Room‐Temperature CsPbI3‐Quantum‐Dot Reinforced Solid‐State Li‐Polymer Battery

IF 13 2区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Small Pub Date : 2025-01-11 DOI:10.1002/smll.202407713

Wentao Wang, Aili Jia, Yiping Wang, Yuanxiao Qu, Junfeng Huang, Wen Zhang, Haitao Zhang

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引用次数: 0

Abstract

A novel polymer electrolyte based on CsPbI3 quantum dots (QDs) reinforced polyacrylonitrile (PAN), named as PIL, is exploited to address the low room‐temperature (RT) ion conductivity and poor interfacial compatibility of polymer solid‐state electrolytes. After optimizing the content of CsPbI3 QDs, RT ion conductivity of PIL largely increased from 0.077 to 0.56 mS cm−1, and its Li‐ion transference number () from 0.20 to 0.63. It is revealed that the synergistic enhancement of Li‐ion transport and interface stability is realized by CsPbI3 QDs through Lewis acid–base interaction, ordered polarization of PAN, and interface chemical regulation. These two effects guarantee the robust solid‐electrolyte interface (SEI) in PIL‐based solid‐state batteries. Consequently, PIL electrolyte enables solid‐state Li‐metal batteries to deliver extraordinary RT cycling performance as verified by excellent cycling stability (>2000 h at 0.1 mA cm−2) of Li|PIL|Li symmetric batteries. Moreover, Li|PIL|LFP (LFP is LiFePO4) and Li|PIL|NCM811 (NCM811 is Li(Ni0.8Co0.1Mn0.1)O2) batteries maintain capacity retention of 81.2% and 77.9%, respectively, after 600 cycles at 0.5 C, as well as good rate‐capability and very high Coulombic efficiency at RT.

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来源期刊

Small 工程技术-材料科学：综合

CiteScore

17.70

自引率

3.80%

发文量

1830

审稿时长

2.1 months

期刊介绍： Small serves as an exceptional platform for both experimental and theoretical studies in fundamental and applied interdisciplinary research at the nano- and microscale. The journal offers a compelling mix of peer-reviewed Research Articles, Reviews, Perspectives, and Comments. With a remarkable 2022 Journal Impact Factor of 13.3 (Journal Citation Reports from Clarivate Analytics, 2023), Small remains among the top multidisciplinary journals, covering a wide range of topics at the interface of materials science, chemistry, physics, engineering, medicine, and biology. Small's readership includes biochemists, biologists, biomedical scientists, chemists, engineers, information technologists, materials scientists, physicists, and theoreticians alike.