5V锂离子电池正极材料的制备和电化学性能研究 |
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引用本文: | 陈前火,童庆松,连锦明. 5V锂离子电池正极材料的制备和电化学性能研究[J]. 吉林化工学院学报, 2003, 20(3): 5-9 |
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作者姓名: | 陈前火 童庆松 连锦明 |
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作者单位: | 福建师范大学,化学系,福建,福州,350007 |
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基金项目: | 福建省教育厅基金资助项目(JB0019、JA02159);福建自然科学基金资助项目(E0110021) |
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摘 要: | 用液相法合成出用锂和镍取代的尖晶石锂锰氧化物正极材料.用XRD和FTIR对其进行了表征,并探讨了其在有机电解液的电化学性能.研究结果表明:在锂锰氧化物掺入适量的镍(锰∶镍的摩尔比为1.4∶0.6)可以改善尖晶石LiMn2O4的循环性能,提高放电平台,使其大部分容量往高电位方向移动,电池的放电电压提高,这样的材料适合做5V电池的正极材料.
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关 键 词: | 锂离子电池 5V正极材料 制备 充放电曲线 循环伏安图 |
文章编号: | 1007-2853(2003)03-0005-05 |
修稿时间: | 2003-03-26 |
Synthesis and electrochemical characteristics of cathode materials as 5V lithium ion batteries |
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Abstract: | A series of electrochemical spinel compounds doped by nickel and lithium are synthesized by liquid method.The materials are characterized with XRD and FT IR,and their electrochemical properties in the organic electrolytic solution are studied.The results show that proper quantity of nickel (molar ratio of Mn to Ni is 1.4∶0.6) can improve the cycling performance of LiMn2O4,increase the discharge platform so that a majority of capacities move to higher potential.Moreover,higher temperature and oxygen ambience can increase discharge capacity and make materials discharge at higher potential. |
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Keywords: | lithium ion batteries 5V cathode materials preparation charge-discharge curve cyclic volt-ampere grapy |
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