Bipolar current collector, preparation method thereof, bipolar electrode and lithium battery

• Main Authors: SUN XINSEN, LI YONGWEI, LI QIQIGE, JIANG YANRU, GONG XIUFENG, JIANG HONGFENG, WANG CHAO, AI CHUNXIAO
• Format: Patent
• Language: Chinese; English
• Published: 08.08.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention relates to the technical field of current collectors, in particular to a bipolar current collector, a preparation method of the bipolar current collector, a bipolar electrode and a lithium battery. The current collector comprises a positive electrode metal layer, a negative electrode metal layer and a base material arranged between the positive electrode metal layer and the negative electrode metal layer; wherein the material of the positive electrode metal layer is selected from one or more of Ni, Ti, Cu, Ag, Au, Pt, Fe, Co, Cr, W, Mo, Al, Mg, K, Na, Ca, Sr, Ba, Si, Ge, Sb, Pb, In and Zn, and the material of the negative electrode metal layer is selected from one or more of Ni, Ti, Cu, Ag, Au, Pt, Fe, Co, Cr, W, Mo, Al, Mg, K, Na, Ca, Sr, Ba, Si, Ge, Sb, Pb, In and Zn. The bipolar current collector provided by the invention is high in conductivity, good in ductility and low in surface density, and the effective energy volume ratio of the lithium battery can be remarkably improved. 本发明涉及集流体技术领域，