Lithium-ion batteries use lithium-containing compounds as positive electrodes. During charging and discharging, there is no metallic lithium, only lithium ions, which is lithium ion batteries.
When the battery is charged, lithium ions are generated on the positive electrode of the battery, and the generated lithium ions move to the negative electrode through the electrolyte. In Li-
During the charging and discharging process of ion Batteries, lithium ions are in a state of movement from positive electrode to negative electrode to positive electrode. Li-
Ion Batteries are like a rocking chair. The two ends of the rocking chair are the two poles of the battery, while lithium ions are running back and forth like athletes. So Li-
Ion Batteries are also called Rocking Chair Batteries.
When the battery is charged, lithium ions are generated on the positive electrode of the battery, and the generated lithium ions move to the negative electrode through the electrolyte.
However, the carbon as the negative electrode has a layered structure and has many micropores. Lithium ions reaching the negative electrode are embedded in the micropores of the carbon layer. The more lithium ions embedded, the higher the charging capacity. Similarly, when the battery is discharged (The process of using the battery)
The lithium ion embedded in the negative carbon layer is removed and moved back to the positive electrode.
The more lithium ions return to the positive electrode, the higher the discharge capacity.
Generally, the charging current of lithium battery is set at 0.
Between 2C and 1C, the greater the current, the faster the charging, and the greater the battery heating.
Moreover, the capacity is not full enough for excessive current charging, because the electrochemical reaction inside the battery takes time.
Just like pouring beer, if it is too fast, it will produce bubbles, but it will be dissatisfied.
For batteries, normal use is the process of discharging.
Lithium battery discharge need to pay attention to several points: first, the discharge current should not be too large, too large current leads to internal heating of the battery, which may cause permanent damage.
On the mobile phone, this is no problem, you can not consider it. Second, never discharge!
Lithium batteries are most afraid of overdischarge, once the discharge voltage is lower than 2. 7 V, it may cause the battery to be scrapped.
Fortunately, the protection circuit has been installed inside the cell phone battery. If the voltage is not low enough to damage the battery, the protection circuit will work and stop discharging.
As can be seen from the figure, the larger the battery discharge current, the smaller the discharge capacity and the faster the voltage drop.
Lithium Ion battery uses carbon material as negative electrode and lithium-containing compound as positive electrode. There is no metal lithium, only lithium ion, which is lithium ion battery
Lithium Ion battery refers to the general term of battery with lithium ion embedded compound as positive electrode material.
The charging and discharging process of lithium ion battery is the embedding and deembedding process of lithium ion.
In the process of lithium ion embedding and de-embedding, it is accompanied by embedding and de-embedding with equivalent electrons such as lithium ion (
Traditionally, positive electrodes are represented by insertion or deinsertion, while negative electrodes are represented by insertion or deinsertion).
In the process of charging and discharging, lithium ions are embedded/unembedded and inserted/uninserted between the positive and negative electrodes, which are vividly called 'Rocking Chair batteries '.
Positive electrode reaction: lithium ion is embedded during discharge and lithium ion is embedded during charging.
When charging: lifepo2→li1.
When xFePOa XLit xe is discharged: Li1xFePO2 XLit xer→lifepo4 negative reaction: lithium ion is removed during discharge and lithium ion is inserted during charging.
When charging: xLi xer 6C → LixC6 when discharging: LixC6 → xLi xe 6C
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