The difference between sodium batteries and lithium batteries

The difference between sodium batteries and lithium batteries

1. The difference in charge carriers inside the battery. Lithium batteries are charged and discharged by moving and converting lithium ions between the positive and negative electrodes. Sodium-ion batteries realize charge transfer through the insertion and extraction of sodium ions between the positive and negative electrodes. In fact, the working principles of the two are the same.

2. The ionic radii of the two are different. This radius difference causes the performance of sodium-ion batteries to be far inferior to that of lithium-ion batteries; the negative electrode of lithium ions can be made of graphite, but sodium ions can hardly be deintercalated in graphite/ Embedded, the capacity is very small.

Other carbon materials can reach up to almost more than 300 mAh after treatment; the capacity of ions in the positive electrode is very small, only more than 100 mAh; sodium ions are embedded/deintercalated in the positive and negative electrodes The resistance is large due to the large radius; the reversibility is poor and the irreversible capacity loss is large.

Current status of China's sodium-ion battery industry

Sodium-ion battery is an emerging industry, and it may require more research and development before it can bloom like a rose of time. In China, the pace of industrialization of sodium batteries is accelerating. In January 2019, the sodium-ion battery independently developed by Liaoning Xingkong Sodium Battery Co., Ltd. in Anshan recently entered the mass production stage, and the world's first sodium-ion battery production line was put into operation.

From an industrial perspective, the current industrialization of sodium batteries is still in its infancy. Many research results are only circulated in universities and research institutes, and it will take some time before they are truly implemented - even some researchers Says sodium-ion batteries have no chance at all before Earth's lithium reserves are exhausted.

Sodium batteries may also be like artificial intelligence technology. They may not be favored by people at first and can only be circulated among academics, but one day they may undergo a mutation and be quickly implemented in the industry. This is very possible, so sodium batteries actually deserve the attention of forward-thinking entrepreneurs and investors.