钠电池的发明时间是什么时候？

What are the core components of Sodium-ion Battery?    

钠离子电池的技术研究起步时间很早，20世纪80年代全球科研机构就已开启钠离子电池的基础理论研究，研发时间与锂离子电池几乎同步，属于同期布局的电池技术。但受限于早期材料技术不成熟、能量密度偏低、锂电产业快速崛起替代等因素，钠离子电池长期停留在实验室研究阶段，未能实现产业化落地。直至2020年前后，随着锂电原材料价格暴涨、储能市场需求爆发、钠电池正负极材料技术取得突破性迭代，钠离子电池正式迎来产业化窗口期，头部企业实现量产下线，此后2021-2025年快速完成技术迭代、产能扩张和场景落地，正式走入商用普及阶段。

A complete Sodium-ion Battery cell is composed of six core components, which perform their own duties and cooperate with each other, and are indispensable to jointly ensure the stable charge and discharge operation of the battery. The first is the cathode, the source of sodium ions, which determines the voltage, capacity and core performance of the battery; the second is the anode, responsible for storing sodium ions, which affects the cycle life and charge rate of the battery; the third is the electrolyte, the liquid channel for sodium ion migration, which determines the conduction efficiency and low temperature performance of the battery; the fourth is the separator, which physically isolates the cathode and anode, prevents internal short circuit and ensures battery safety; the fifth is the current collector, which collects and conducts current. Both cathode and anode of sodium battery can use aluminum foil, which greatly reduces the cost; the sixth is the shell, which is divided into steel shell, aluminum shell and soft package structure, which plays the role of sealing, protection and fixing the internal structure. The six components work together to form a complete energy storage system of Sodium-ion Battery.