| 罗河伟,王晨,李丹阳,刘明悦,罗嫚,蔡美晴,马贺.化学通报,2026,89(5):581-588. |
| 高性能锂离子电池多羰基萘二酰亚胺聚合物正极材料 |
| High-performance polycarbonyl naphthalene diimide polymer cathode material for lithium-ion battery |
| 投稿时间：2026-02-03 修订日期：2026-02-28 |
| DOI： |
| 中文关键词: 锂离子电池 有机正极材料 萘二酰亚胺聚合物 高比容量 长循环 |
| 英文关键词:Lithium-ion battery, organic cathode material, naphthalene diimide polymers, high specific capacity, long cycle performance |
| 基金项目:国家自然科学基金项目(22075255)、河南省科技攻关项目(242102240007)和河南省高等学校重点科研项目(25A530007)资助 |
|
| 摘要点击次数: 271 |
| 全文下载次数: 0 |
| 中文摘要: |
| 含羰基结构的有机电极材料由于其结构灵活可调、比容量高等优点越来越受到人们的关注。但是受限于有机材料易溶于电解液的缺点，其应用于锂离子电池时循环性能比较差。本文以电化学性能稳定的萘二酰亚胺为结构单元，构筑多羰基聚合物电极材料（P(NDA-BTC)）。该材料含有多个羰基电化学活性基团，比容量显著高于单一萘二酰亚胺结构单元，初始放电比容量达到265 mAh g-1。由于P(NDA-BTC)含有多个萘二酰亚胺刚性基团，该聚合物结构稳定且在电解液中极难溶解，因而展现出优异的倍率性能与循环性能，在0.2C的电流密度下比容量为264 mAh g-1，10C电流密度下比容量仍有247 mAh g-1。该材料在10 C条件下进行测试，首圈放电容量为251 mAh g-1，经过10000次充放电循环后可逆容量为158 mAh g-1，容量保持率为63%，库伦效率保持接近100%。本研究为高性能有机正极材料的高效设计策略提供了新思路。 |
| 英文摘要: |
| Organic electrode materials with carbonyl groups have attracted increasing attention due to their advantages of tunable structure and high specific capacity. However, limited by the drawback of dissolution in electrolytes, organic materials exhibit poor cycling performance when applied in lithium-ion batteries. In this work, a polycarbonyl polymer electrode material (P(NDA-BTC)) was constructed using electrochemically stable naphthalene diimide as the structural unit. This material contains multiple carbonyl electroactive groups, resulting in a specific capacity much higher than that of the single naphthalene diimide structural unit. Its initial discharge specific capacity reaches 265 mAh g-1. Owing to the multiple rigid naphthalene diimide groups in P(NDA-BTC), the polymer features a stable structure and extremely low solubility in electrolytes. The polymer exhibits excellent rate performance and cycling performance. It delivers a specific capacity of 264 mAh g-1 at a current density of 0.2C, and still maintains a specific capacity of 247 mAh g-1 even at 10C. When tested at 10C, the material shows an initial discharge capacity of 251 mAh g-1. After 10,000 charge-discharge cycles, it retains a reversible capacity of 158 mAh g-1 with a capacity retention rate of 63%, while the coulombic efficiency remains nearly 100%. This work provides a new insight into the efficient design strategy for high-performance organic cathode materials. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
京公网安备11010802047317号