| 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 |
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| 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-1，1 000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。 |
| 关键词: 电化学 有机正极 杯[4]醌 离子液体 锂离子电池 |
| 基金项目: 国家自然科学基金（No.21403187，21875206）和河北省自然科学基金（No.B2019203500）资助项目。 |
| Abstract: In this work, calix[4]quinone (C4Q), 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 C4Q cathode to assemble LIBs, which made positive progress in cycling stability and rate capability. At the current density of 0.1C, 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 1 000 cycles. At 1C, the capacity could be still maintained at about 154 mAh·g-1. |
| Keywords: electrochemistry organic cathode calix[4]quinone ionic liquids lithium-ion battery |
| 投稿时间：2020-03-18 修订日期：2020-07-02 |
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| 孙会民,周文君,黄苇苇,王丽秋.高容量有机正极材料杯[4]醌在离子液体中的储锂性能[J].无机化学学报,2020,36(9):1701-1706. |
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