【摘 要】
：
The synthesis of Al2O3-coated and uncoated LiMn2O4 by solid-state method and fabrication of LiMn2O4/graphite battery were described.The structure and morphology
【机 构】
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School of Materials Science and Engineering,School of Metallurgical Science and Engineering
【基金项目】
：
supported by the Advanced Person Fund of Jiangsu University,China;国家重点基础研究发展规划(973计划)
论文部分内容阅读
The synthesis of Al2O3-coated and uncoated LiMn2O4 by solid-state method and fabrication of LiMn2O4/graphite battery were described.The structure and morphology of the powders were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM),respectively.The electrochemical and overcharge performances of Al2O3-coated and uncoated LiMn2O4 batteries were investigated and compared.The uncoated LiMn2O4 battery shows capacity loss of 16.5％ after 200 cycles,and the coated LiMn2O4 battery only shows 12.5％ after 200 cycles.The uncoated LiMn2O4 battery explodes and creates carbon,MnO,and Li2CO3 after 3C/10 V overcharged test,while the coated LiMn2O4 battery passes the test.The steadier structure,polarization of electrode and modified layer are responsible for the safety performance.
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