Simultaneously achieving high energy and power density for ultrafast-charging supercapacitor built by a semi-graphitic hierarchical porous carbon nanosheet and a high-voltage alkaline aqueous electrolyte

Zhang, Deyi; Yang, Baocheng; She, Wenna; Gao, Shiyao; Wang, Jingruo; Wang, Yi; Wang, Kunjie; Li, Hongxia; Han, Lele

doi:10.1016/j.jpowsour.2021.230103

Cited by 36 publications

(24 citation statements)

References 55 publications

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“…Furthermore, the elemental composition and their valence states of the prepared NCCO material are analyzed by XPS. As presented in Figure 2c, both C, O, Ni, and Co are detected on the surface of the prepared [26,34].…”

Section: Resultsmentioning

confidence: 81%

“…The spin‐orbit splitting value of Co 2p 2/3 and Co 2p 1/2 exceeds 14 eV, also suggesting the coexistence of Co 2+ and Co 3+ cations [21, 33]. The high‐resolution XPS spectrum of C 1s (Figure 2f) can be fitted and divided into three peaks denoted as non‐oxygenated carbon (284.8 eV), C−O (286.4 eV), and O−C=O (288.6 eV) [26, 34].…”

Section: Resultsmentioning

confidence: 96%

“…Gravimetric and areal specific capacity of the active material are calculated by the following formulas [26, 27]:

true Q_{g} = \frac{2 I \times \int V d t}{3.6 Δ V \times m}

true Q_{s} = \frac{2 I \times \int V d t}{3.6 Δ V \times S}

…”

Section: Methodsmentioning

confidence: 99%

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Flower‐like NiCo‐carbonate Hydroxides for High‐performance Solid‐state Hybrid Supercapacitor

et al. 2022

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Compared to the traditional transition metal layered double hydroxides, transition metal layered carbonate double hydroxides (TMC‐LDHs) possess superior electrochemical performance in theory. But TMC‐LDHs have not received its deserved attention, especially for application in the energy storage field. In this work, a flower‐like TMC‐LDH (Ni0.75Co0.25(CO3)0.125(OH)2, NCCO) material was successfully prepared by hydrothermal method, which exhibits a high specific capacity of 306.8 mAh g−1 (0.52 mAh cm−2) at 0.5 A g−1 with capacity retention of 70.5 % after 2000 cycles. The solid‐state hybrid supercapacitor device NCCO//PVA/KOH//IHPC based on the prepared NCCO material and an interconnected hierarchical porous carbon (IHPC) delivers a high specific energy of 50.96 Wh kg−1 at a specific power of 1.06 kW kg−1, and a high specific energy of 36.39 Wh kg−1 still can be delivered at a high specific power of 10.49 kW kg−1. More than 181.2 % of initial specific capacity is retained after 12000 cycles. The specific energy, energy retention under large specific power, and the cycle stability of the assembled device are better than most of the solid‐state hybrid supercapacitors that have been reported. These results demonstrate the promising prospect of the TMC‐LDH material in the practical application in advanced solid‐state supercapacitors.

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Section: Resultsmentioning

confidence: 81%

Section: Resultsmentioning

confidence: 96%

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Flower‐like NiCo‐carbonate Hydroxides for High‐performance Solid‐state Hybrid Supercapacitor

et al. 2022

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“…The energy‐power density of our device performance is higher than the existing studies for aqueous electrolyte‐based supercapacitors. The reported operation voltages and compared with the published data AC//AC(YP‐50), 40 M‐d‐VO 2 @CC//MnO 2 @CC, 93 SeG‐HPCN‐750//HPCN, 92 ACF‐900//ACF‐900, 91 HPCNFs‐N//HPCNFs‐N, 99 PCG, 100 PPy/GO/MnOx, 27 PANI‐CNF, 101 PPy‐MGO, 102 SWNTs@MnO 2 /PPy 103 supercapacitors were shown in Figure 9B.…”

Section: Resultsmentioning

confidence: 89%

An ultrahigh‐energy density and wide potential window aqueous electrolyte supercapacitor built by polypyrrole/aniline 2‐sulfonic acid modified carbon felt electrode

Yazar

Arvas

Şahin

2022

Intl J of Energy Research

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Summary In this study, excellent performance and wide operating voltage are obtained with an aqueous electrolyte. Aqueous electrolytes are attracted more attention than other electrolytes (such as organic solvents, ionic liquids) in supercapacitor applications because of their safety, low cost, nontoxicity. Polypyrrole (PPy), aniline 2‐sulfonic acid (ASA) modified electrodes are hydrothermal synthesized on carbon felt (CFt) for supercapacitor applications. We investigate the presence of the concentration of ASA on the polymerization of the PPy. Furthermore, a high operating voltage of 3.0 V asymmetric supercapacitor (ASC) with graphite plate is assembled 3 M KCI. CFt/PPy/ASA(0.02)//GP exhibits a high specific capacitance value of 902.9 F g−1 at 5 mV s−1 and after 5000 cycle‐life testing 93.6% capacitance retention at a scan rate of 1000 mV s−1. The assembled ASC has an ultrahigh‐energy density of 1005 Wh kg−1 while delivering a power density of 3000 W kg−1 at a current density of 2 A g−1. The effect of ASA concentration on the supercapacitor performance has been observed.

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“…2d, the nitrogen adsorption and desorption curves of the KGL exhibit the combination of types I and IV isotherms, indicating that it is both a microporous and mesoporous material. 28,29 The nitrogen adsorption capacity of the KGL increased sharply at a relative pressure of P / P 0 < 0.01, indicating that the nitrogen adsorption was mainly dominated by micropores. 30 There is an H4 hysteresis loop at a higher relative pressure, which indicates the existence of mesopores in the KGL.…”

Section: Resultsmentioning

confidence: 99%

Redox molecule Alizarin red S anchored on biomass-derived porous carbon for enhanced supercapacitive performance

Bao

Chen

et al. 2022

New J. Chem.

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Simultaneously achieving high energy and power density for ultrafast-charging supercapacitor built by a semi-graphitic hierarchical porous carbon nanosheet and a high-voltage alkaline aqueous electrolyte

Cited by 36 publications

References 55 publications

Flower‐like NiCo‐carbonate Hydroxides for High‐performance Solid‐state Hybrid Supercapacitor

Flower‐like NiCo‐carbonate Hydroxides for High‐performance Solid‐state Hybrid Supercapacitor

An ultrahigh‐energy density and wide potential window aqueous electrolyte supercapacitor built by polypyrrole/aniline 2‐sulfonic acid modified carbon felt electrode

Redox molecule Alizarin red S anchored on biomass-derived porous carbon for enhanced supercapacitive performance

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