钠电池亏电存放会损坏吗？

Will Sodium-ion Battery be damaged if stored in a power loss state?    

钠离子电池的耐亏电性能远优于锂电池，偶尔短期亏电存放不会造成永久性损坏，补电后可快速恢复正常性能，但长期深度亏电存放仍会对电池造成不可逆的损伤，影响电池容量和使用寿命。钠电池化学稳定性好，电极结构抗损伤能力强，即使出现电量完全放空的情况，只要及时补电，不会造成电极活性物质永久性失效，电池容量和性能可快速恢复。但如果电池长期处于深度亏电状态，存放时间超过3个月以上，电池内部会发生轻微的不可逆副反应，导致电极活性物质衰减、内阻升高，电池容量出现永久性下降，严重时会导致电池无法正常充放电、彻底报废。因此，钠电池长期不使用时，需先充至50%-70%的电量，再存放于阴凉干燥处，每3-6个月补电一次，避免电池长期亏电存放，保障电池使用寿命。

Sodium-ion Battery has much better power loss resistance than Lithium-ion Battery. Occasional short-term power loss storage will not cause permanent damage, and the normal performance can be quickly recovered after recharging. However, long-term deep power loss storage will still cause irreversible damage to the battery, affecting the battery capacity and service life. Sodium batteries have good chemical stability and strong anti-damage ability of electrode structure. Even if the power is completely discharged, as long as it is recharged in time, it will not cause permanent failure of electrode active materials, and the battery capacity and performance can be quickly recovered. However, if the battery is in a deep power loss state for a long time for more than 3 months, slight irreversible side reactions will occur inside the battery, leading to the attenuation of electrode active materials, the increase of internal resistance, and the permanent decrease of battery capacity. In severe cases, the battery will not be able to charge and discharge normally and be completely scrapped. Therefore, when sodium batteries are not used for a long time, they need to be charged to 50%-70% of the power first, then stored in a cool and dry place, and recharged every 3-6 months to avoid long-term power loss storage and ensure the service life of the battery.