Abstract
With an 11Ah LiMn2O4 battery as the object of study, through disassembling the battery after normal charge and normal discharge as well as over-charge and over-discharge, and using such methods as x-ray diffraction and scanning electron microscope, this study explores the micro-changes that happened to the material for the anode and cathode of this lithium battery after over-charge and over-discharge, and provides the measures to prevent batteries from charge and discharge, so as to avoid potential safety problems during the use of lithium batteries.
Highlights
With the popularization of lithium-ion batteries, their safety issues become more pressing, and under existing technical conditions, the over-charge and over-discharge of lithium-ion cells is inevitable
This study looks at the substances in anodes and cathodes from a micro-perspective after the experiment on LiMn2O4 batteries through normal charge and normal discharge as well as over-charge and over-discharge
Experimental procedures: with 11Ah LiMn2O4 power batteries in over-charge and overdischarge at 20°C ± 5°C temperatures as the objects of experiment, through disassembling batteries, and using such analytical means as x-ray diffraction and scanning electron microscope, this experiment has explored the micro-changes that happened to the anodes and cathodes under over-charge and over-discharge
Summary
With the popularization of lithium-ion batteries, their safety issues become more pressing, and under existing technical conditions, the over-charge and over-discharge of lithium-ion cells is inevitable. A lot of research has been conducted into the thermal behavior of lithium batteries towards over-charge and over-discharge, as well as failure mechanism and electric resistance changes [1-7]. This study looks at the substances in anodes and cathodes from a micro-perspective after the experiment on LiMn2O4 batteries through normal charge and normal discharge as well as over-charge and over-discharge
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