钠电池集流体和锂电池有何不同？

What is the difference between the current collector of Sodium-ion Battery and Lithium-ion Battery?    

钠电池与锂电池的集流体选型存在颠覆性差异，也是钠电池成本优势的核心来源之一。锂离子电池的集流体有严格区分：正极采用轻质耐腐蚀的铝箔，负极必须采用昂贵的铜箔，因为锂电解液体系中铝箔会发生腐蚀，无法用于负极。而钠离子电池的电解液体系化学性质稳定，正负极均可采用低成本铝箔作为集流体，无需使用铜箔。铜属于高价稀缺金属，铝是大宗平价金属，这一结构差异大幅减少了贵金属耗材，简化了生产工艺，直接降低了电池整体生产成本，让钠电池的价格优势得以充分凸显。

There is a subversive difference in the current collector selection between Sodium-ion Battery and Lithium-ion Battery, which is also one of the core sources of the cost advantage of sodium batteries. The current collector of Lithium-ion Battery has strict distinction: the cathode uses light and corrosion-resistant aluminum foil, and the anode must use expensive copper foil, because aluminum foil will corrode in the lithium electrolyte system and cannot be used for the anode. While the electrolyte system of Sodium-ion Battery has stable chemical properties, both cathode and anode can use low-cost aluminum foil as the current collector, without using copper foil. Copper is a high-priced and scarce metal, while aluminum is a bulk and low-cost metal. This structural difference greatly reduces the consumption of precious metal consumables, simplifies the production process, and directly reduces the overall production cost of the battery, making the price advantage of sodium batteries fully highlighted.