-(2)Safety performance and application analysis of lithium cobalt oxide batteries

(2)Safety performance and application analysis of lithium cobalt oxide batteries
author:enerbyte source:本站 click147 Release date: 2023-12-01 13:21:28
abstract:
2. Lithium iron phosphate battery The theoretical capacity is 170mAh/g, and the actual achievable capacity of the material is 160mAh/g. In terms of safety, lithium iron phosphate has high thermal stability and low electrolyte oxidation ability, thus ensuring high safety; But...

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2. Lithium iron phosphate battery

The theoretical capacity is 170mAh/g, and the actual achievable capacity of the material is 160mAh/g. In terms of safety, lithium iron phosphate has high thermal stability and low electrolyte oxidation ability, thus ensuring high safety; But the defects are low conductivity, large volume, high electrolyte usage, and poor consistency of the battery due to its large capacity.

3. Cobalt lithium ion battery

The biggest feature in preparation is that after being fully charged, there is still a large amount of lithium ions left on the positive electrode, which means that the negative electrode cannot accommodate more lithium ions attached to the positive electrode. However, in an overcharged state, the excess lithium ions on the positive electrode will still move towards the negative electrode, which cannot fully accommodate them and form metallic lithium on the negative electrode. As metallic lithium is a dendritic crystal, it is called dendrite. Once dendrite is formed, It will provide an opportunity to puncture the diaphragm, which will form an internal short circuit. Due to the important component of the electrolyte being carbonate, which has a lower flash and boiling point, it can burn or even explode at higher temperatures. Controlling the formation of lithium dendrites is relatively easy on small capacity lithium-ion batteries, so cobalt oxide lithium-ion batteries are currently limited to small capacity batteries such as portable electronic devices and cannot be used for power lithium-ion batteries.

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