塑料科技2024，Vol.52Issue(6)：10-15,6.DOI:10.15925/j.cnki.issn1005-3360.2024.06.003
三维高导电网络聚乙烯/碳复合双极板的制备及性能研究
Study on Preparation and Performance of Three-Dimensional and High Conductivity Polyethylene/Carbon Composite Bipolar Plate
摘要
Abstract
As one of the components of vanadium batteries,the low conductivity of bipolar plates has become an important factor in restricting the improvement of battery performance.Polyethylene(PE)and various dimensional conductive fillers,such as spherical carbon black(CB),flake graphite(FG),linear carbon fiber(CF),and carbon nanotubes(CNTW),were used as the main raw materials to prepare a point-line-surface three-dimensional highly conductive network carbon plastic composite bipolar plate,and the conductive mechanism was analyzed.The results show that 33%CB can form a conductive path inside PE.The addition of 15%FG increases the contact area with carbon black,thereby enhancing the electrical conductivity of the carbon plastic composite bipolar plate.The addition of 7%CNTW and 5%CF in the bipolar plate forms short-range and long-range conductive pathways,resulting in optimal electrical conductivity and bending strength of 20 S/cm and 46.5 MPa,respectively.The energy efficiency of the bipolar plate reaches 70%at a high current density of 300 mA/cm2,which is 6.5%higher than that of the CB/FG bipolar plate.The energy efficiency of the bipolar plate does not decrease significantly after 500 charge and discharge cycles,indicating that the bipolar plate has good rate capability and service life.关键词
钒电池/聚乙烯树脂/碳塑复合双极板/导电网络Key words
Vanadium battery/Polyethylene resin/Carbon plastic composite bipolar plate/Conductive network分类
通用工业技术引用本文复制引用
秦野,韩松,王硕,刘畅..三维高导电网络聚乙烯/碳复合双极板的制备及性能研究[J].塑料科技,2024,52(6):10-15,6.基金项目
辽宁省组织部项目(XLYC2007157) （XLYC2007157）
辽宁省教育厅项目(LJKMZ20220768) （LJKMZ20220768）
辽宁省科技厅项目(2023-MSLH-271) （2023-MSLH-271）
