设计基于PAN-LiTFSI的“盐中聚合物”电解质，碳纳米管作为锂金属电池填料

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-03-04 DOI:10.1016/j.materresbull.2025.113400

Xinguang Fang , Xiaobo Wang , Songdong Yuan , Haoran Yu , Jintao Xiao , Rui Liang , Guodong Jiang , Jian Xiong , Ya Sun , Deng Ding

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引用次数: 0

摘要

本研究以不同添加量的聚丙烯腈（PAN）、双氟甲烷磺酰亚胺锂（LiTFSI）和碳纳米管（CNTs）为主体聚合物、电解质盐和纳米填料制备高性能固体聚合物电解质（SPE）。CNTs的加入不仅提高了SPE的机械强度，而且改善了其电气性能。在25℃下，1.8wt% cnt填充PAN-LiTFSI电解质的离子电导率为2.93 × 10-4 S cm-1，远高于零填充的电解质（2.52 × 10-5 S cm-1）。阳极电位和Li离子转移数也分别增加到4.84 V和0.41 V。随后，测试了以LPC- 1.8%为电解质组装的LiFePO4/LPC/Li全电池的电学性能。在0.1C条件下，第一次充放电容量分别为135.8 mAh g-1和135.3 mAh g-1。在130次循环后，它仍然保持124.7 mAh g-1和119.4 mAh g-1。库仑效率约为95.8%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Designing “polymer-in-salt” electrolyte based on PAN-LiTFSI with carbon nanotubes as a filler for lithium metal battery

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Designing “polymer-in-salt” electrolyte based on PAN-LiTFSI with carbon nanotubes as a filler for lithium metal battery

In this study, polyacrylonitrile (PAN), lithium bisfluoromethanesulfonimide (LiTFSI) and carbon nanotubes (CNTs) with different addition amounts (LPC) were used as the host polymer, electrolyte salt and nano-filler to prepare high-performance solid polymer electrolyte (SPE). The introduction of CNTs not only enhanced mechanical strength but also improved electrical performance of SPE. The ionic conductivity of the 1.8wt% CNT-filled PAN-LiTFSI electrolyte at 25 °C was 2.93 × 10^–4 S cm^-1, which was much higher than that of the zero-filled electrolyte (2.52 × 10^–5 S cm^-1). In addition, the anode potential and Li ion transfer number also increased to 4.84 V and 0.41, respectively. Subsequently, the electrical performance of LiFePO₄/LPC/Li full cells assembled by using LPC-1.8 % as electrolyte was tested. The charge and discharge capacity in the first cycle were 135.8 mAh g^-1 and 135.3 mAh g^-1 at 0.1C, respectively. After 130 cycles, it still maintained 124.7 mAh g^-1 and 119.4 mAh g^-1. The coulombic efficiency was about 95.8 %.

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.