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The difference between lithium ion battery and lithium battery

by:UFO      2020-01-06
Lithium ion battery (Li-ion Batteries)It was developed from lithium batteries. So before the introduction, introduce the lithium battery. For example, the button-type battery used in the camera was a lithium battery. The positive electrode material of lithium battery is manganese dioxide or thionyl chloride, and the negative electrode is lithium. After the battery is assembled, the battery has voltage and does not need to be charged. This kind of battery can also be charged, but its cycle performance is not good. During the charging and discharging cycle, lithium crystals are easy to form, causing short circuit inside the battery, therefore, this kind of battery is generally prohibited from charging. Later, Sony Corporation of Japan invented a lithium battery with carbon material as the negative electrode and lithium-containing compound as the positive electrode. During the charging and discharging process, there is no metal lithium, only lithium ion, which is the lithium ion battery. 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. In the early 1980s S, M. B. Armond first proposed the idea of replacing the metal lithium anode in secondary lithium batteries with lithium-embedded compounds. In the new system, both positive and negative electrode materials adopt lithium ion embedding/deembedding materials. When the battery is charged, the lithium-containing compound of the positive electrode has lithium ion prolapse, and the lithium ion moves to the negative electrode through the electrolyte. The carbon material of 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. 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. The battery capacity we usually refer to refers to the discharge capacity. In 1990, SONY Corporation of Japan officially launched LiCoO,/graphite, a kind of lithium ion battery. The battery successfully used carbon material which can reversibly deintercalate lithium to replace metallic lithium as the negative electrode, the shortcomings of low cycle life and poor safety of lithium secondary batteries are overcome, and lithium ion batteries are commercialized. It marks a revolution in the battery industry.
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