Lithium battery energy storage system diaphragm

Why is the diaphragm important in a lithium ion battery?

The diaphragm of a lithium-ion battery has important functions, such as preventing a short circuit between the positive and negative electrodes of the battery and improving the movement channel for electrochemical reaction ions.

Does zinc borate modify diaphragm increase lithium-ion migration number?

The results show that the zinc borate modified diaphragm increases the lithium-ion migration number of the battery. This is because the Lewis acid sites of zinc borate can absorb anions in the battery system, and the increase in the migration number of lithium ions will help improve rate performance .

Can Zinc borate modified diaphragm improve lithium iron phosphate battery performance?

As a result, the zinc borate modified diaphragm holds promise for increasing the lithium iron phosphate battery system's overall electrochemical performance. Hongyu Cheng, Jiyue Hou, and Yiyong Zhang designed all experiments.

What are the lithium ion migration numbers of ZNB modified diaphragm?

The lithium-ion migration numbers of ZnB modified diaphragm are 0.41, while the lithium-ion migration numbers of ZnO modified diaphragm and routine diaphragm are 0.3 and 0.21. When the battery is working, the charge transfer rate of lithium ions reflects the charging and discharging characteristics of the battery.

Why does a composite diaphragm store more electrolytes under the same volume?

Therefore, the composite diaphragm can store more electrolytes under the same volume. Zinc borate has the synergistic effect of boric acid groups and polar metal bonds, which promotes the transmission of lithium ions in the electrode, thereby increasing the conductivity of lithium ions.

How to calculate lithium ion migration number?

Use formula 6 to calculate the lithium-ion migration number of the routine diaphragm, ZnO modified diaphragm, and ZnB modified diaphragm. The lithium-ion migration numbers of ZnB modified diaphragm are 0.41, while the lithium-ion migration numbers of ZnO modified diaphragm and routine diaphragm are 0.3 and 0.21.