In Situ Construction Channels of Lithium-Ion Fast Transport and Uniform Deposition to Ensure Safe High-Performance Solid Batteries

IF 13 2区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Small Pub Date : 2023-05-26 DOI:10.1002/smll.202301572

Yangmingyue Zhao, Libo Li, Yuhang Shan, Da Zhou, Xiaochuan Chen, Wenjun Cui, Heng Wang

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引用次数: 3

Abstract

Solid-state lithium-ion batteries (SLIBs) are the promising development direction for future power sources because of their high energy density and reliable safety. To optimize the ionic conductivity at room temperature (RT) and charge/discharge performance to obtain reusable polymer electrolytes (PEs), polyvinylidene fluoride (PVDF), and poly(vinylidene fluoride-hexafluoro propylene) (P(VDF-HFP)) copolymer combined with polymerized methyl methacrylate (MMA) monomers are used as substrates to prepare PE (LiTFSI/OMMT/PVDF/P(VDF-HFP)/PMMA [LOPPM]). LOPPM has interconnected lithium-ion 3D network channels. The organic-modified montmorillonite (OMMT) is rich in the Lewis acid centers, which promoted lithium salt dissociation. LOPPM PE possessed high ionic conductivity of 1.1 × 10⁻³ S cm⁻¹ and a lithium-ion transference number of 0.54. The capacity retention of the battery remained 100% after 100 cycles at RT and 0.5 C. The initial capacity of one with the second-recycled LOPPM PE is 123.9 mAh g⁻¹. This work offered a feasible pathway for developing high-performance and reusable LIBs.

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原位构建锂离子快速传输和均匀沉积通道，确保高性能固体电池的安全

固态锂离子电池（SLIB）具有高能量密度和可靠的安全性，是未来电源的发展方向。为了优化室温下的离子导电性（RT）和充电/放电性能以获得可重复使用的聚合物电解质（PE），使用聚偏二氟乙烯（PVDF）和聚偏二氟乙烯-六氟丙烯（P（VDF-HFP））共聚物与聚合的甲基丙烯酸甲酯（MMA）单体组合作为基底来制备PE（LiTFSI/OMMT/PVDF/P（VDF-HFP）/PMMA[LOPM]）。LOPPM具有互连的锂离子3D网络通道。有机改性蒙脱土富含路易斯酸中心，促进了锂盐的离解。LOPPM PE具有1.1×10−3 S cm−1的高离子电导率和0.54的锂离子迁移数。在RT和0.5 C下循环100次后，电池的容量保持率保持100%。第二次回收LOPPM PE的电池的初始容量为123.9 mAh g−1。这项工作为开发高性能和可重复使用的LIBs提供了一条可行的途径。

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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.