Nine-Electron Transfer of Binder Synergistic π-d Conjugated Coordination Polymers as High-Performance Lithium Storage Materials

作者：Wu, Yiwen; Shen, Jiadong; Sun, Zhaoyu; Yang, Yan; Li, Fangkun; Ji, Shaomin; Zhu, Min; Liu, Jun^*

来源：Angewandte Chemie - International Edition, 2023, 62(4).

DOI：10.1002/anie.202215864

• Coordination Polymers
• Electrode Materials
• Lithium-Ion Batteries
• Nine-Electron Transfer
• Synergistic Effect

To solve the problems such as the dissolution and the poor conductivity of organic small molecule electrode materials, we construct pi-d conjugated coordination polymer Ni-DHBQ with multiple redox-active centers as lithium storage materials. It exhibits an ultra-high capacity of 9-electron transfers, while the pi-d conjugation and the laminar structure inside the crystal ensure fast electron transport and lithium ion diffusion, resulting in excellent rate performance (505.6 mAh g(-1) at 1 A g(-1) after 300 cycles). The interaction of Ni-DHBQ with the binder CMC synergistically inhibits its dissolution and anchors the Ni atoms, thus exhibiting excellent cycling stability (650.7 mAh g(-1) at 0.1 A g(-1) after 100 cycles). This work provides insight into the mechanism of lithium storage in pi-d conjugated coordination polymers and the synergistic effect of CMC, which will contribute to the molecular design and commercial application of organic electrode materials.

• 单位
  广东工业大学