Aug. 29, 2022
Now the update of mobile phone systems is getting faster and faster, and the charging speed of the mobile phone is getting faster and faster. It can be fully charged in an hour from the previous one night. Nowadays, the batteries used in smartphones are lithium batteries. Although it is said that the charging speed is faster than that of the previous nickel batteries, it is still not as fast as the charging speed of super capacitors, and it is easily damaged. The supercapacitor is fast in both charging and discharging, and can be repeatedly charged and discharged hundreds of thousands of times so it can work for a long time.
Reasons why supercapacitors charge faster:
1. Supercapacitors can directly store charges without chemical reactions during the power storage process. There is no impedance generated by electrochemical reactions, and the charging and discharging circuit is simple. Therefore, supercapacitors charge faster, have higher power density than batteries and less energy loss.
2. The porous carbon material used in the supercapacitor increases the specific surface area of the structure, the specific surface area increases, and the charge adsorbed on the surface area also increases, thereby expanding the power storage capacity of the supercapacitor, and the porous carbon material also has excellent conductivity, which makes the transfer of charge easier.
This is why the supercapacitor charges so fast that it can reach more than 95% of its rated capacitance in 10 seconds to 10 minutes. Moreover, the crystal structure of the supercapacitor electrode material will not change due to charging and discharging, and it can be recycled for a long time.
Due to the some restriction of supercapacitors, they cannot replace lithium batteries at present. However, I believe that the problem of small supercapacitor capacity will be broken in the future, let us look forward to it together.
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