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Title

EXPLORING THE EFFECT OF STRUCTURAL DEFECT ON THE PERFORMANCE OF P-DOPED (6,6) CNT-BASED SUPERCAPACITORS

Pages

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Abstract

 SUPER CAPACITORS DUE TO HIGH POWER DENSITY, ENABLING FAST CHARGING AND DISCHARGING, ARE USED TO STORE ELECTRICAL ENERGY. HOWEVER, THEIR LOWER ENERGY DENSITY IN COMPARISON WITH CONVENTIONAL BATTERIES, LIMITS THE USE OF THIS ENERGY STORAGE DEVICE. IN THIS REGARD, EXTENSIVE RESEARCHES IN THE FIELD OF SUPERCAPACITORS ARE PERFORMED TO INCREASE THE CAPACITY OF SUPER CAPACITORS [1]. CARBON NANOTUBE (CNTS) -BASED MATERIAL ARE PROMISING MATERIALS FOR USE IN SUPER CAPACITOR ELECTRODES [2].DESPITE OF ADVANTAGE OF CNTS-BASED ELECTRODE, MAJOR LIMITATION OF LOW QUANTITY OF SPECIFIC CAPACITY DUE TO THEIR LOW QUANTUM CAPACITANCE REMAIN [3]. ALL DENSITY FUNCTIONAL THEORY (DFT) CALCULATIONS WERE COMPLETED USING QUANTUM ESPRESSO CODE AND PREDEW-WANG91 (GGAPW91) EXCHANGE-CORRELATION FUNCTIONAL. OUR RESULTS INDICATE THAT QUANTUM CAPACITANCE SIGNIFICANTLY IS IMPROVED BY CHANGING IN THE ELECTRONIC STRUCTURE THROUGH DOPANTS AND DEFECTS. THE OBTAINED RESULTS FROM DENSITY OF STATE (DOS) OF P-DOPED (6, 6) CNTS INDICATES THAT IMPURITY STATES ARE CREATED AROUND THE FERMI LEVEL (SEE FIGURE 1A). QUANTUM CAPACITANCE OF P-DOPED (6, 6) CNTS IN THE WATER STABILITY RANGE (FOR V=-0.4-0.83) ARE INCREASED COMPARED WITH QUANTUM CAPACITANCE OF PURE (6, 6) CNTS. IN THESE CASES THE QUANTUM CAPACITANCE IS ALMOST SYMMETRIC AROUND ZERO VOLTAGE AND INCREASED BOTH THE NEGATIVE AND THE POSITIVE BIAS (SEE FIGURE 1B).

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    APA: Copy

    JAHANBAKHSHI, P., Targholi, E., & MOUSAVI KHOSHDEL, S.M.. (2015). EXPLORING THE EFFECT OF STRUCTURAL DEFECT ON THE PERFORMANCE OF P-DOPED (6,6) CNT-BASED SUPERCAPACITORS. ANNUAL ELECTROCHEMISTRY SEMINAR OF IRAN. SID. https://sid.ir/paper/920079/en

    Vancouver: Copy

    JAHANBAKHSHI P., Targholi E., MOUSAVI KHOSHDEL S.M.. EXPLORING THE EFFECT OF STRUCTURAL DEFECT ON THE PERFORMANCE OF P-DOPED (6,6) CNT-BASED SUPERCAPACITORS. 2015. Available from: https://sid.ir/paper/920079/en

    IEEE: Copy

    P. JAHANBAKHSHI, E. Targholi, and S.M. MOUSAVI KHOSHDEL, “EXPLORING THE EFFECT OF STRUCTURAL DEFECT ON THE PERFORMANCE OF P-DOPED (6,6) CNT-BASED SUPERCAPACITORS,” presented at the ANNUAL ELECTROCHEMISTRY SEMINAR OF IRAN. 2015, [Online]. Available: https://sid.ir/paper/920079/en

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