508
Home
Dr.Wu
Research
Member
Publications
News
Contact
Publications
 
All
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
2010
2009
2007
2006
   
Pyridinic nitrogen enriched porous carbon derived from bimetal organic frameworks for high capacity zinc ion hybrid capacitors with remarkable rate capability
Posted:2020-08-10 09:42    Column:2021

Y. Li, P.F. Lu, P. Shang, L.S. Wu, X. Wang, Y.F. Dong*, R.H. He, Z.-S. Wu*

Journal of Energy Chemistry, 2021, 56, 404-411.

DOI: 10.1016/j.jechem.2020.08.005 [PDF]

Aqueous zinc ion hybrid capacitors (ZIHCs) hold great potential for large-scale energy storage applications owing to their high safety and low cost, but suffer from low capacity and energy density. Herein, pyridinic nitrogen enriched porous carbon (nPC) was successfully synthesized via the growth, subsequent annealing and acid etching of bimetal organic frameworks for high capacity and safe ZIHCs with exceptional rate capability. Benefiting from the mesopores for easy ion diffusion, high electrical conductivity enabled by in-situ grown carbon nanotubes matrix and residual metal Co nanoparticles for fast electron transfer, sufficient micropores and high N content (8.9 at%) with dominated pyridinic N (54%) for enhanced zinc ion storage, the resulting nPC cathodes for ZIHCs achieved high capacities of 302 and 137 mAh g−1at 1 and 18 A g−1, outperforming most reported carbon based cathodes. Theoretical results further disclosed that pyridinic N possessed larger binding energy of −4.99 eV to chemically coordinate with Zn2+than other N species. Moreover, quasi-solid-state ZIHCs with gelatin based gel electrolytes exhibited high energy density of 157.6 Wh kg−1at 0.69 kW kg−1, high safety and mechanical flexibility to withstand mechanical deformation and drilling. This strategy of developing pyridinic nitrogen enriched porous carbon will pave a new avenue to construct safe ZIHCs with high energy densities.

Dalian Institute of Chemical Physics, CAS
457 Zhongshan Road Dalian, China 116023
E-mail: wuzs@dicp.ac.cn

Copyright © 2D Materials Chemistry & Energy Applications Group. All Rights Reserved.

Home / Dr.Wu / Research / Member / Publications / News / Contact