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Why are lithium batteries only a certain number of charge-discharge? The chemical theory? (Brief answer like ~

Answers:2   |   LastAnswerAt:2021.06  

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visitor
Ivy Bush 
Asked at 2011.06.10 00:43:50

answer juicy lee  Answered at 2011.06.10 00:43:50
Lithium-ion battery cathode material of lithium in the active compounds are usually composed of the negative is a special molecular structure of carbon. Common principal components of the cathode material LiCoO2, charging, added to the battery positive pole of the electric potential of the compound to force the release of lithium ions, embedded negative elements were arranged in the lamellar structure of the carbon. Discharge, lithium-ion from the lamellar structure of the carbon precipitation and re-cathode combination of compounds. Lithium-ion movement have a current. Lithium-ion battery capacity after repeated charge-discharge will continue to decline, its causes are complex and diverse. Mainly positive and negative changes in the material itself, from the molecular level, the positive and negative electrodes of lithium ion on the hole to accommodate the structure will gradually collapse, clogging; from the chemical point of view, is the passive activity of positive and negative material, there's the other side to form a stable compounds. Cathode material physics will appear gradually falling off, etc., in short, can ultimately reduce the battery charging and discharging process of free movement of lithium-ion number.
answer 185.104.166.* Answered at 2021.06.03 08:07:32
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