高容量有机正极材料杯[4]醌在离子液体中的储锂性能  

High Capacity Organic Cathode Calix[4]quinone in Ionic Liquids Electrolyte for Lithium-Ion Batteries

作　　者：孙会民 周文君[1] 黄苇苇 王丽秋 SUN Hui-Min;ZHOU Wen-Jun;HUANG Wei-Wei;WANG Li-Qiu(School of Environmental and Chemical Engineering,Yanshan University,Qinhuangdao,Hebei 066004,China;Qinhuangdao Vocational and Technical College,Qinhuangdao,Hebei 066100,China)

机构地区：[1]燕山大学环境与化学工程学院,秦皇岛066004 [2]秦皇岛职业技术学院,秦皇岛066100

出　　处：《无机化学学报》2020年第9期1701-1706,共6页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.21403187,21875206);河北省自然科学基金(No.B2019203500)资助项目。

摘　　要：选用理论容量高达446 mAh·g^-1的杯[4]醌(calix[4]quinone,C4Q)作为正极材料,研究其储锂性能。由于C4Q在常规有机电解液中的溶解问题会在一定的程度上限制其性能最大化,我们选用Li[TFSI]/[PY13][TFSI]([PY13][TFSI]:1-丙基-1-甲基吡咯烷鎓双三氟甲基磺酰亚胺)离子液体电解液与C4Q进行匹配组装锂离子电池,较大程度地提升了其循环稳定性和倍率性能。在0.1C的电流密度下,循环100圈后的放电比容量为280 mAh·g^-1,1000圈后的容量保持率高达72%。当电流密度增加至1C时,放电容量仍有154 mAh·g^-1。In this work,calix[4]quinone(C4 Q),with a high theoretical capacity up to 446 mAh·g^-1,was selected as the cathode for lithium-ion batteries(LIBs).While the solubility issue in conventional organic electrolytes would prevent its electrochemistry properties from being fully exploited.To this end,the Li[TFSI]/[PY13][TFSI]([PY13][TFSI]:N-methyl-N-propylpyrrolidiniumbis(trifluoromethanesulfonyl)amide)electrolyte was chosen to match C4 Q cathode to assemble LIBs,which made positive progress in cycling stability and rate capability.At the current densi-ty of 0.1 C,the discharge specific capacity was 280 mAh·g^-1(77%of initial capacity)after 100 cycles,and the capacity retention rate was as high as 72%after 1000 cycles.At 1 C,the capacity could be still maintained at about154 mAh·g^-1.

关 键 词：电化学 有机正极 醌 离子液体 锂离子电池 

分 类 号：O646.21[理学—物理化学]