碳纤维电极/集流器集成提高结构电池复合材料性能

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing Pub Date : 2025-05-27 DOI:10.1016/j.compositesa.2025.109065

Lei Tian, Xiaolong Ji, Lin Zhao, Qin Lei, Jinrui Ye

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引用次数: 0

摘要

碳纤维增强结构电池复合材料（sbc）采用单个集流器（SCF），其力学性能和电化学性能优于传统的金属/CF集流器（M/CF）。本研究以LiFePO4 （LFP）包覆CF织物为阴极，石墨包覆CF织物为阳极，多孔树脂浸泡液体电解质作为结构电解质制备sbc。在0.3C温度下，scf - sbc的初始比容量为122.0 mAh/gLFP （43.6 mAh/ g电极），比M/ cf - sbc提高52.3%，初始能量密度为10.0 Wh/kg。经过100次循环后，scf - sbc保持了91.9%的容量，而mcf - sbc则保持了72.5%的容量。scf - sbc的抗拉强度和抗弯强度分别为221.8 MPa和119.8 MPa，分别比mcf - sbc高127.0%和59.3%。总之，scf - sbc在电化学和机械方面的显著优势得到了证实。

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Improved performance of structural battery composites through carbon fiber electrode/current collector integration

Carbon fibers (CF) reinforced structural battery composites (SBCs) using single CF current collectors (SCF) are proposed to enhance mechanical and electrochemical properties over traditional metal/CF assembly current collectors (M/CF). This study fabricates SBCs using LiFePO₄ (LFP)-coated CF fabric as the cathode, graphite-coated CF fabric as the anode, and a porous resin soaked with liquid electrolyte as the structural electrolyte. SCF-SBCs exhibit an initial specific capacity of 122.0 mAh/g_LFP (43.6 mAh/g_electrode) at 0.3C, which is 52.3 % higher than that of the M/CF-SBCs, with an initial energy density of 10.0 Wh/kg. After 100 cycles, SCF-SBCs maintain 91.9 % of their capacity, in contrast to 72.5 % for MCF-SBCs. Furthermore, SCF-SBCs demonstrate superior tensile and flexural strengths of 221.8 MPa and 119.8 MPa, respectively, which are 127.0 % and 59.3 % higher than those of MCF-SBCs. Overall, the notable benefits of SCF-SBCs in electrochemical and mechanical aspects are confirmed.

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来源期刊

Composites Part A: Applied Science and Manufacturing 工程技术-材料科学：复合

CiteScore

15.20

自引率

5.70%

发文量

492

审稿时长

30 days

期刊介绍： Composites Part A: Applied Science and Manufacturing is a comprehensive journal that publishes original research papers, review articles, case studies, short communications, and letters covering various aspects of composite materials science and technology. This includes fibrous and particulate reinforcements in polymeric, metallic, and ceramic matrices, as well as 'natural' composites like wood and biological materials. The journal addresses topics such as properties, design, and manufacture of reinforcing fibers and particles, novel architectures and concepts, multifunctional composites, advancements in fabrication and processing, manufacturing science, process modeling, experimental mechanics, microstructural characterization, interfaces, prediction and measurement of mechanical, physical, and chemical behavior, and performance in service. Additionally, articles on economic and commercial aspects, design, and case studies are welcomed. All submissions undergo rigorous peer review to ensure they contribute significantly and innovatively, maintaining high standards for content and presentation. The editorial team aims to expedite the review process for prompt publication.