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    諾德智造“透明”銅箔 國內首創微孔銅箔研發成功!

    2018-06-25

    諾德股份微孔銅箔。


    一卷透著金屬光澤的銅箔,伸展開來薄如蟬翼

    透過微孔銅箔,依然能看清眼前的事物

    如同帶上一副茶色的眼鏡

    這種“超級材料”就是微孔銅箔

    別看它輕巧薄透,卻可廣泛應用于動力、儲能等領域

    諾德股份出品的微孔銅箔的研發成功并實現量產

    同等面積箔材,其重量可減輕20%至70%,

    從而極大提升鋰離子電池比能量


    諾德股份微孔銅箔。

    鋰離子電池是當今電池市場上最具活力和增長最快的電池產品,從發展趨勢來看,電池制造商面臨的主要挑戰一直是消費者對更大的能量密度的持續需求,無論是體積能量密度還是重量能量密度。


    隨著能量密度的不斷提升,動力電池廠商也對銅箔提出了更高的要求,超薄銅箔(≤6μm)、高抗拉強度的銅箔、微孔銅箔、涂層銅箔等紛紛面世。盡管鋰電銅箔緊俏,但對銅箔企業來說,時時緊跟市場最新需求才能在不斷的市場變化中脫穎而出。


    日前,諾德股份再傳佳訊——旗下全資子公司青海電子材料產業發展有限公司(以下簡稱:青海電子)微孔銅箔的研發成功并實現量產。在減輕鋰離子電池重量的同時,大幅提升鋰離子電池的電池容量,對動力電池行業技術提升有重大推動作用。


      青海電子于2007年入駐西寧(國家級)經濟技術開發區東川工業園區,分期建設年產25000噸高檔電解銅箔項目,于2012年實現達產。近年來,公司針對鋰電產業的發展,不斷提高鋰電銅箔的精度及產量,通過不斷改進技術與工藝,率先突破厚度僅為6微米、幅寬最大可達1380毫米的高端鋰離子電池專用銅箔生產工藝并實現量產。

      

    特別是6微米高抗張強度電解銅箔已成功運用于鋰離子電池中,其具有優異的下游加工性能,可承受充放電發熱所引起的膨脹應力,從而大幅提高鋰離子電池壽命。2018年,公司6微米鋰離子電池專用電解銅箔產量將達到公司總產量的一半,公司主要客戶包括LG、CATL、比亞迪等全球鋰電產業巨頭,始終站在鋰電銅箔供應商第一梯隊。


    ▲諾德股份6μm鋰電高端銅箔


    隨著青海千億鋰電產業規劃的實施,以及全球鋰電產業的迅猛發展和未來發展趨勢,青海電子材料產業發展有限公司瞄準技術前沿和高端產品再次發力,于今年3月成功試產微孔銅箔,成為全球首創。即在厚度為6至9微米的原有鋰電銅箔基礎之上做二次深加工,保持銅箔本身的物理及化學性能基本不變,同時可保持較高的延展率與抗拉強度。


    諾德股份微孔銅箔。《青海日報》記者肖子樹 攝


      銅箔孔徑、開孔率及寬幅等可根據客戶實際需求定制,孔徑范圍可達30至120微米,開孔率可達20%至70%。可用作鋰離子電池、固態鋰離子電池、鋰離子電容器、超級電容器等導電集流體,同時適用于鎳鎘、鎳氫電池等。


    目前,諾德股份打孔銅箔系列產品已通過各項性能測試,同等面積箔材,其重量可減輕20%至70%,從而提升鋰離子電池比能量。

    在鋰電池體積相同情況下,如果負極集流體使用有孔電解銅箔,可實現以下四大效果:

    一是孔隙可使表面積增加,能容納更多負極材料,增加鋰電池電容量。

    二是多孔銅箔和負極材料接觸面積增加,銅箔和負極材料粘性提高,能夠防止電池充電放電后負極材料出現脫落,以獲得更高電容量保持率,延長電池使用壽命。

    三是彌補涂布不均問題。鋰離子能夠利用有孔電解銅箔中的孔隙在其兩面之間自由移動,使鋰離子由集中區向稀疏地帶移動,以補償涂布不均問題。

    四是一般來說,單位重量有孔電解銅箔比無孔電解銅箔更長,單位長度下有孔電解銅箔能分切成更多極片,節省用戶使用及購買成本。

    諾德股份微孔銅箔。


    諾德股份利用這項獨有工藝生產的電解銅箔孔隙透析率均勻、無毛刺,銅箔物理性能穩定,優于市場上使用激光或機械打孔技術。同時,通過箔材孔隙間形成的“錨型”黏合,功能涂層粘附力、浸潤效率及浸潤一致性等均得以大幅度提升,從而明顯提高鋰離子電池高倍率放電性能。


    未來,諾德股份將持續聚焦新能源汽車市場,依托多年電解銅箔研發制造經驗不斷探索創新,開發更多貼近未來市場發展趨勢的產品。按照規劃,未來,諾德將依托于銅箔領域,謀劃建立更為廣闊的新能源版圖。


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