(哈爾濱理工大學 材料科學與工程學院，哈爾濱 150040)
摘 要: 鋰離子二次電池在通訊、交通、電子、航空航天等領(lǐng)域的廣泛應(yīng)用促進了銅箔這一鋰電池負極集流體主要材料的需求，銅箔性能的優(yōu)劣將會影響電池的性能。綜述了銅箔在鋰離子二次電池中的作用及其生產(chǎn)工藝。探討銅箔的抗拉強度、伸長率、表面粗糙度、厚度均勻性及表面質(zhì)量等對電池性能的影響。闡述了電動汽車等所需高能量密度、高功率的新一代鋰離子二次電池對銅箔性能的挑戰(zhàn)，指出今后研制銅箔應(yīng)向高強、高導、更薄的方向發(fā)展。
關(guān)鍵字: 銅箔；鋰離子二次電池；負極材料；高能量密度
（School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China）
Abstract:Copper foil is the main material of the negative electrode current collector in lithium ion secondary batteries. The lithium ion secondary batteries are widely applied in communication, transportation, electronic and aerospace fields, this promotes a demand for copper foils. The properties copper foils will affect the properties of lithium ion secondary batteries. The role of copper foils in lithium ion secondary batteries and their fabrication technology were summarized. The effects of properties of copper foils, such as tensile strength, elongation, surface roughness, thickness uniformity and surface qualities, on the performance of batteries were discussed. The challenge from high energy density and power batteries for electric vehicles for copper foils was emphatically elaborated, and the development tendency of copper foils in the future was pointed out.
Key words: copper foil; lithium ion secondary batteries; negative electrode; high energy density
