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What is lithium ion battery, the chemical reaction mechanism of lithium battery and the characteristics of lithium battery

by:dcfpower     2021-03-28
What is lithium ion battery? Lithium ion battery refers to a secondary battery formed by Li+ intercalation and extraction between the positive and negative electrodes. • The positive electrode uses LixMO2 (Mu003dCo/Ni/Mn), a lithium-containing oxygen compound. • The negative electrode uses lithium-carbon intercalation compound LixC6. • The electrolyte is an organic mixture in which lithium salts LiPF6 or LiAsF6 are dissolved. • During the charging and discharging process, Li+ intercalates and deintercalates back and forth between the positive and negative electrodes, which is vividly called a rocking chair battery. The electrochemical reaction mechanism of a lithium ion battery is positive reaction: LiCoO2 → Li1-xCoO2 + xLi+ + xe -Negative electrode reaction: C + xLi+ + xe-→LixC Total reaction: LiCoO2 + C ↔Li1-xCoO2 + LixC Lithium-ion battery characteristics In theory, compared with ordinary primary batteries, lithium-ion batteries have obvious advantages: a. High voltage: 3 times of general Ni-Cd and Ni-MH b. High energy density, 3 times of Ni-Cd, 2 times of Ni-MH c. Wide operating temperature range: generally -20℃~ Working at 60℃ d. Smooth discharge, superior cycle performance, no memory effect e. Low self-discharge rate, less than 10%, long storage time, long working life, etc. f. Environmental protection, no pollution.u003c/pu003e
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