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| Synthesis and Electrochemical Performance of Spherical Porous Vanadium Nitride |
Zhaohui GAO( ), Jianwei CHI, Maoyong TANG, Yanjun WANG, Jianping XU |
| School of Science, Dalian Ocean University, Dalian 116023, China |
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Cite this article:
Zhaohui GAO, Jianwei CHI, Maoyong TANG, Yanjun WANG, Jianping XU. Synthesis and Electrochemical Performance of Spherical Porous Vanadium Nitride. Chinese Journal of Materials Research, 2018, 32(11): 867-873.
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Abstract Spherical porous VN materials were synthesized by a facile NH3 reduction method with spherical V2O5 as the precursor,while the spherical V2O5 was prepared via soft template method and spray drying technology. The structure, morphology and electrochemical performance of the prepared VN were characterized by means of XRD,SEM,TEM,and N2 adsorption-desorption analysis, as well as cyclic voltammetry and galvanostatic charge-discharge measurements. The results show that the synthesized spherical porous VN powder presents cubic crystallographic structure with abundant mesopores,and its specific surface area is 120 m2·g-1. In addition, the spherical porous VN powder presents characteristics both in electrical double-layer capacitance and redox pseudo-capacitance . Its specific capacitance is 513 F·g-1 by current density of 100 mA·g-1,and which remained 76.8% even after 5000 cycles. For power density is 590 W·kg-1,its energy density is 65.0 W·h·kg-1. When the power density was 3260 W·kg-1,the energy density was as high as 24.17 W·h·kg-1.
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Received: 01 December 2017
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| Fund: Supported by Special Funds from the Central Finance to Support the Development of Local Universities (No. 500217201010) and Natural Science Foundation of Liaoning Province (No. 20170540109) |
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