摘要
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.
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.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2012年第3期596-602,共7页
Acta Physico-Chimica Sinica
基金
国家重点基础研究发展计划项目(973)(2009CB220100)资助~~
