Parameters Involved in CVD Growth of CNT: A Review

Shah, Aunggat; Saha, Gautam; Mahato, Mrityunjoy

doi:10.1007/978-981-19-2572-6_14

Cited by 5 publications

(3 citation statements)

References 60 publications

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“…CNTs are suitable for flexible electrodes due to their high strength, lightweight materials with Young's modulus of 1 TPa, and tensile strength of 63 GPa. 13,14 In this regard, quality of CNTs can also be a parameter to influence the storage performance of SCs, which has been reported in the present work.…”

Section: Introductionsupporting

confidence: 69%

“…CNTs have higher SSA through their lower tube diameter (inner and outer diameters), which can reduce the separation between electrode–electrolyte boundaries, thus increasing the supercapacitive performance of SCs . CNTs can be derived from renewable carbon sources, and hence, can be low-cost and environmentally friendly. − CNTs are ideal among the carbon materials for SC applications due to their high surface area and high thermal/chemical stability, − low electrolyte solution resistance or equivalent series resistance (ESR), porous structure, a wide range of band gap (0.18–1.8 eV), and tunable electrical properties. , A quantum confinement effect may also arise in CNTs from single-walled CNTs to multi-walled carbon nanotubes (MWCNTs), which may be an influential parameter for SC materials. CNTs are suitable for flexible electrodes due to their high strength, lightweight materials with Young’s modulus of 1 TPa, and tensile strength of 63 GPa. , In this regard, quality of CNTs can also be a parameter to influence the storage performance of SCs, which has been reported in the present work.…”

Section: Introductionmentioning

confidence: 99%

“…9−11 CNTs are ideal among the carbon materials for SC applications due to their high surface area and high thermal/chemical stability, 9−11 porous structure, a wide range of band gap (0.18−1.8 eV), and tunable electrical properties. 12,13 A quantum confinement effect may also arise in CNTs from single-walled CNTs to multi-walled carbon nanotubes (MWCNTs), which may be an influential parameter for SC materials. CNTs are suitable for flexible electrodes due to their high strength, lightweight materials with Young's modulus of 1 TPa, and tensile strength of 63 GPa.…”

Section: Introductionmentioning

confidence: 99%

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Supercapacitor Performance of NiO, NiO-MWCNT, and NiO–Fe-MWCNT Composites

Shah,

Senapati,

Murthy

et al. 2023

ACS Omega

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The NiO-CNT and NiO–Fe-CNT composites that have been prepared from waste high density polyethylene plastic and their carbon nanotube (CNT) quality-dependent supercapacitance tuning have been reported here. Multiwalled CNT (MWCNT) formation has been confirmed from TEM and Raman spectra with an I D/I G ratio of 0.77, which stands for high graphitization. The specific surface area (SSA) of MWCNTs in the NiO–Fe-CNT composite was 87.8 m2/g, while in the NiO-CNT composite, it was 25 m2/g. NiO–Fe-CNT displayed higher specific capacitance and energy density (1360 Fg–1 and 1180 W h kg–1) than NiO-CNT (1250 Fg–1 and 1000 W h kg–1), which may be due to the presence of higher-quality MWCNTs in the NiO–Fe-CNT composite. NiO–Fe-CNT displayed higher contributions of electric double-layer capacitor (59%) behavior compared to NiO-CNT (38%) and represented a hybrid supercapacitor. NiO–Fe-CNT also displayed a capacitive retention of 96% after 1000 charge–discharge cycles. Furthermore, studies in acidic electrolytes revealed higher performance of NiO–Fe-CNT than NiO-CNT, displaying specific capacitances of NiO–Fe-CNT to be 1147 Fg–1 in 2 M H2SO4 and 943 Fg–1 in 2 M HCl. It has been qualitatively explored that the quality of CNTs, SSA, and quantum confinement effects in the composites may be the factors responsible for the performance difference in NiO–Fe-CNT and NiO-CNT. The present work is geared toward the low-cost fabrication of high-quality CNT composites for supercapacitors and energy storage applications. The present work also contributes quantitatively to the understanding of CNT quality as an important parameter for the performance of CNT-composite-based supercapacitors.

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Section: Introductionsupporting

confidence: 69%