氨基蒽醌衍生物的合成及其用作锂电池正极材料的电化学性能

合成了两种新型的有机正极材料——5-氨基-2,3-二氢-1,4-二羟基蒽醌(ADDAQ)和5-氨基-1,4-二羟基蒽醌(ADAQ),用核磁氢谱(1H-NMR)、质谱(MS)、元素分析(EA)、傅里叶红外(FTIR)光谱、紫外-可见(UV-Vis)光谱等方法对材料进行了表征,应用恒流充放电(GD/C)、循环伏安法(CV)、交流阻抗(EIS)等测试手段对材料的电化学性能进行了测试.实验结果表明:相比ADDAQ,ADAQ首次放电容量和循环性能都有显著提高.ADAQ的首次放电比容量为185mAh·g-1,50次循环之后容量为93mAh·g-1.并讨论了ADDAQ和ADAQ电化学性能差异的原因.

Preparation and Electrochemical Performance of Aminoanthraquinone Derivative as Cathode Materials in Rechargeable Lithium Batteries

Two novel organic compounds,5-amino-2,3-dihydro-1,4-dyhydroxy anthraquinone(ADDAQ) and 5-amino-1,4-dyhydroxy anthraquinone(ADAQ),were synthesized as cathode materials for lithium batteries.The compounds were characterized by 1 H nuclear magnetic resonance( 1 H NMR)spectroscopy, mass spectrometry(MS),elemental analysis(EA),Fourier transform infrared spectroscopy(FTIR), ultraviolet-visible(UV-Vis)spectroscopy.The electrochemical performance of the compounds was investigated by galvanostatic discharge/charge(GD/C)measurements,cyclic voltammetry(CV),and electrochemical impedance spectrum(EIS).Compared with ADDAQ,the initial discharge specific capacity and cycle performance of ADAQ were effectively improved.The initial discharge specific capacity of ADAQ was 185 mAh·g -1 ,after 50 cycles,the specific capacity was maintained at 93 mAh·g -1 .A reason for this improvement is discussed.