溶胶-凝胶法合成LiAl0.1Mn1.9O4 及其电化学性能

摘要

Spinel-type LiAl0.1Mn1.9O4 have been synthesized by sol-gel method. We found that Al-doped LiMn2O4 can overcome capacity fading, showed relatively good cycling performances. The structural and electrochemical properties of LiAl0.1Mn1.9O4 was investigated by X-ray diffraction(XRD),charge/discharge. Electrochemical test of the Al-doped LiAl0.1Mn1.9O4 showed excellent rate capability, better reversibility than that of no Al-doped LiMn2O4.%通过溶胶-凝胶法合成LiAl0.1Mn1.9O4 ,XRD的结果表明掺杂少量的铝后并没有改变晶体的结构.利用恒流充放电测试手段比较研究了尖晶石型的LiAl0.1Mn1.9O4 ,铝的掺杂后的LiAl0.1Mn1.9O4 比没有掺杂的LiMn2O4 更好的可逆性能,更好的循环性能.