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The difference between lithium batteries and solar cells

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The difference between lithium batteries and solar cells

2025-01-08

Working principle of lithium battery

 Lithium Battery.jpg

Lithium battery is a kind of battery that uses lithium metal or lithium alloy as positive/negative electrode material and non-aqueous electrolyte solution.

Lithium metal battery: basic principle of lithium battery Lithium metal battery is generally a battery that uses manganese dioxide as positive electrode material, metal lithium or its alloy metal as negative electrode material, and non-aqueous electrolyte solution.

Lithium ion battery: Lithium ion battery is generally a battery that uses lithium alloy metal oxide as positive electrode material, graphite as negative electrode material, and non-aqueous electrolyte.

Working principle of solar cell (cannot do without sunlight)

Solar cell is a device that directly converts light energy into electrical energy through photoelectric effect or photochemical effect. Thin-film solar cells that work on the photoelectric effect are the mainstream, while solar cells that work on the principle of photochemical effect are still in their infancy. Sunlight shines on the semiconductor p-n junction to form new hole-electron pairs. Under the action of the p-n junction electric field, holes flow from the n region to the p region, and electrons flow from the p region to the n region. When the circuit is connected, current is formed.

Compared with lithium batteries, one disadvantage of solar cells is obvious, that is, they cannot be separated from sunlight. The conversion of solar energy into electrical energy is synchronized with the sunshine in real time. Therefore, for solar energy, only daytime or even sunny days are its home field, but it cannot be completely free from the limitations of time and environment and used flexibly as long as it is fully charged like lithium batteries.

Solar cells are devices that directly convert light energy into electrical energy through photoelectric effect or photochemical effect. Thin-film solar cells that work on the principle of photochemical effect are the mainstream, while solar cells that work on the principle of photochemical effect are still in their infancy. Sunlight shines on the semiconductor p-n junction to form new hole-electron pairs. Under the action of the p-n junction electric field, holes flow from the n region to the p region, and electrons flow from the p region to the n region, and current is formed when the circuit is connected.