Synthesis of a microporous poly-benzimidazole as high performance anode materials for lithium-ion batteries

Abstract
Heteroatom-rich two-dimensional graphene-like structure polymers are highly demanded as high-performance anode materials for lithium ion batteries. Here, a new microporous poly-benzimidazole (MPBI) is accomplished by a condensation reaction between pyromellitic acid and 1,2,4,5-tetraaminobenzene in polyphosphoric acid medium. After heat-treatment at 550 °C, the integrated frame structure of the obtained MPBI-550 remains unchanged without the residual edge groups. Due to the holey pore framework, nitrogen-rich aromatic rings and two-dimensional graphene-like structure, MPBI-550 is suitable for lithium-ion battery anode. It exhibits a remarkable long cycling life, high reversible capacity of 700 mAh g−1 (at 1 A g−1) after 500 cycles and a good rate performance. Such a low-cost and high-performance material constitutes a step towards the design and manufacture of functional anode materials for next generation lithium-ion batteries.

Citation
Ren, S., Meng, L., Ma, C., Yu, Y., Lou, Y., Zhang, D., … Feng, S. (2021). Synthesis of a microporous poly-benzimidazole as high performance anode materials for lithium-ion batteries. Chemical Engineering Journal, 405, 126621. doi:10.1016/j.cej.2020.126621

Acknowledgements
Siyuan Ren and Lingkun Meng contributed equally to this work. This work was supported by the Natural Science Foundation of China (nos. 21771077, 21771084 and 21621001), the National Key Research and Development Program of China (no. 2016YFB0701100), the 111 project (no. B17020) and the Foundation of Science and Technology Development of Jilin Province, China (20200801004GH). The authors also gratefully acknowledge the financial support by Program for JLU Science and Technology Innovative Research Team (JLUSTIRT).

Publisher
Elsevier BV

Journal
Chemical Engineering Journal

DOI
10.1016/j.cej.2020.126621

Additional Links
https://linkinghub.elsevier.com/retrieve/pii/S1385894720327492

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