Multi-thiol-supported dicarboxylate-based metal-organic framework with excellent performance for lithium-ion battery

作者：Li, Chao^*; Zhang, Cheng; Wang, Kuaibing^*; Yu, Fei; Xie, Jian; Zhang, Qichun^*

来源：Chemical Engineering Journal, 2022, 431: 133234.

DOI：10.1016/j.cej.2021.133234

• Multi-thiol-supported
• MOF
• Dicarboxylate-based
• Anode
• Lithium-ion battery

With the reversible two-electron redox reaction, dicarboxylates have been widely employed as advanced anodes for lithium-ion batteries. However, dicarboxylate-based anodes always displayed limited capacities, low rate performances, and poor long-cycle abilities due to their inevitable dissolution in the electrolyte. Here, to address the above-motioned issues, a functional multi-thiol-supported dicarboxylate-based metal-organic framework, namely Fe-TTTP, is synthesized and employed as a promising anode for lithium-ion batteries based on the redoxactive Iron (III) ions and organic dicarboxylate ligands. Benefiting from its chemical structure with multiple redox metal-centers, high theoretical specific capacity, and insolubility, Fe-TTTP gains superior electrochemical performances, including a high reversible (charge) capacity of 950 mAh g(-1) at 50 mA g(-1), excellent rate performance (95 mAh g(-1) up to 10000 mA g(-1), 1.1 min for each cycle), and extraordinary cycling stability (310 & PLUSMN; 20 mAh g(-1) for 5000 cycles at 2000 mA g(-1)).

• 单位
  南阳理工学院; 南京农业大学; 电子科技大学