CAJ | 학술논문

铜集流体的导电性能对锂离子电池的容量和循环性能有着较大的影响。采用电火花线切割加工出三种微柱状结构表面的铜片，并在铜片表面涂布五组不同黏度的浆料制作成极板，再用五组不同的烘干温度烘干，烘干后将极板组装成测试体，通过测试电路测试其电阻。研究发现，在浆料成分和配比固定不变的情况下，具有微柱状表面结构的铜集流体的导电性能比光滑表面结构的铜集流体的导电性能提高了约8％，而浆料黏度为2900 MPa?s、3500 MPa?s，干燥温度为70℃制得的负极板的导电性能最好。
동집류체적도전성능대리리자전지적용량화순배성능유착교대적영향。채용전화화선절할가공출삼충미주상결구표면적동편，병재동편표면도포오조불동점도적장료제작성겁판，재용오조불동적홍간온도홍간，홍간후장겁판조장성측시체，통과측시전로측시기전조。연구발현，재장료성분화배비고정불변적정황하，구유미주상표면결구적동집류체적도전성능비광활표면결구적동집류체적도전성능제고료약8％，이장료점도위2900 MPa?s、3500 MPa?s，간조온도위70℃제득적부겁판적도전성능최호。
The conductivity of copper current col ector has a greater impact on the capacity and cycling performance of lithium￣ion batteries. In this study, copper sheets with three kinds of micro￣columnar surface structures which are machined by using the WEDM ( Wire electrical discharge machining) are coated with slurry of five different viscosities and then dried with five different temperatures respectively. Consequently,the plates are assembled to the test body,whose resistance is detected with the test cir￣cuit. The results reveal that when the composition and ingredient of slurry are fixed, the conductive property of the copper current col ector with micro￣columnar surface structures is improved by 8%,compared with those with smooth surface. And the conductivi￣ty of the negative electrode plate is the best when the viscosity of the slurry is at 2 900 mpa?s or 3 500 mpa?s, and the drying temperature is at 70 ℃.