Biligand metal-organic coordination polymer to prepare high N-doped content and structure controllable porous carbon with high-electrochemical performance. (10th June 2019)

• Record Type: Journal Article
• Authors: Li, Hao; Yu, Chuying; Zhou, Yang; Tuo, Huaijin; Zhong, Wenbin
• Is Part Of: Electrochimica acta. Volume 308(2019)
• Page Start: 263
• Page End: 276
• Publication Date: 2019-06-10
• Subjects: Biligand strategy -- Metal-organic coordination polymers -- Controllable microstructure -- N-doped -- Supercapacitors; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2019.04.025
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: N-doped content, N species and microstructure are crucial factors to control the energy storage ability of carbon-based materials. Herein, molecular engineering of metal-organic coordination polymers (MOCPs) by introducing two types of ligands to construct biligand MOCPs is proposed for the first time. Nitrogenous heterocyclic ligand 4, 4′-bipyridine (BPD) and one of the aromatic amine ligands (p-phenylenediamine (PPD), 4, 4′-diaminobiphenyl (AMP) and 3, 3′-diaminobenzidine (DAB)) are selected to perform double-coordination reaction with different metal ions. Biligand MOCPs ([Co3 (BPD)2 (PPD)10 Cl6 ]n, [Ni(BPD)(AMP)3 Cl2 ]n and [Co3 (BPD)2 (DAB)5 Cl6 ]n ) have been successfully synthesized and employed as precursors to prepare N-doped porous carbons, referring as BPCCo, BACNi and BDCCo, respectively. Precise control over N-doped content, N species and microstructure has been fulfilled in these biligand MOCP derived N-doped porous carbons. As-prepared BPCCo, BACNi and BDCCo possess high nitrogen content of 11.39, 8.26 and 9.94 at.% and excellent gravimetric specific capacitance of 402, 316 and 303 F g −1, respectively. The BPCCo, BACNi and BDCCo assembled symmetric supercapacitors show outstanding energy density of 16.50, 13.38 and 12.98 W h kg −1, respectively. The pioneering strategy to molecularly engineer MOCP paves a new avenue in structure controlling over porous carbons. This concept can be further broadened to design component of co-polymers, polymer blends and organic synthetic materials as precursors to obtain expected carbon structures and desired properties.