Journal
RSC ADVANCES
Volume 4, Issue 99, Pages 55971-55979Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra06336h
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Funding
- National Natural Science Foundation of China [21174059, 21374046]
- Program for Changjiang Scholars and Innovative Research Team in University
- Open Project of State Key Laboratory of Superamolecular Structure and Materials [SKLSSM201416]
- Testing Foundation of Nanjing University
- Scientific Research Foundation of Graduate School of Nanjing University
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Phosphorus, nitrogen and oxygen co-doped carbonaceous materials (PNODC) were facilely prepared by pyrolyzing phosphorus, nitrogen and oxygen-rich phytic acid doped polyanilines. ICP analysis and elemental analysis demonstrate that the maximum phosphorus content of the as-prepared PNODC reaches 6.02 wt% with the total heteroatom (phosphorus, nitrogen and oxygen) content up to 32.76 wt%. The symmetric supercapacitor built from PNODC could be operated at a very high working voltage of 1.9 V. A maximum energy density of 21.8 W h kg(-1) is achieved at a power density of 238 W kg(-1) and a voltage load of 1.9 V. The excellent electrochemical performance can be attributed to the high heteroatom content, the synergetic effect of phosphorus and nitrogen/oxygen co-doping and the protection of abundant heteroatom functionalities on the surface of the carbon electrodes.
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