Functional combination of methylene blue and porous carbon mutually promotes to deliver ultrahigh rate capacitive and energy storage performance

Lv, Guangjun; Dai, Xin; Qiao, Yide; Tan, Qihua; Liu, Yongning; Chen, Yuanzhen

doi:10.1016/j.cej.2022.137660

Cited by 17 publications

(6 citation statements)

References 56 publications

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“…30 Furthermore, it is well known that the capacity is positively proportional to the integral area of the CV curves. 31 Obviously, the CN-280 thin film electrodes manifest the largest integral area, indicating the highest capacity and best energy storage performance. The GCD tests recording the duration of charge and discharge processes at fixed potential windows are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Sputtered binder-free Cu₃N electrode materials for high-performance quasi-solid-state asymmetric supercapacitors

Wei

Shen

et al. 2023

Dalton Trans.

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Section: Resultsmentioning

confidence: 99%

Sputtered binder-free Cu₃N electrode materials for high-performance quasi-solid-state asymmetric supercapacitors

Wei

Shen

et al. 2023

Dalton Trans.

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“…As shown in Figure 5b, the charging curves of AC+VB2 with different loadings at a current of 10 mA are simulated and matched with the discharge curves of Ni-CP@Co 8% −NiS x using the same method as our previous work. 48 According to the calculation by using eq 6, the negative material matching Ni-CP@Co 8% − NiS x that has the highest energy density should be 42 mg (Figure 5c). Figure S16 shows the discharge curves and rate performance of 42 mg of AC+VB2 in detail.…”

Section: Resultsmentioning

confidence: 99%

“…To further measure the practical application of Ni-CP@Co 8% –NiS x , an asymmetric supercapacitor device was fabricated using it as the positive electrode and riboflavin functionalized activated carbon (AC+VB2) as the negative electrode, as illustrated in Figure a. As shown in Figure b, the charging curves of AC+VB2 with different loadings at a current of 10 mA are simulated and matched with the discharge curves of Ni-CP@Co 8% –NiS x using the same method as our previous work . According to the calculation by using eq , the negative material matching Ni-CP@Co 8% –NiS x that has the highest energy density should be 42 mg (Figure c).…”

Section: Resultsmentioning

confidence: 99%

Anti-Shedding Nickel-Protection-Layer Boosting an Ultrahigh Loading Carbon Fiber@Co–NiS_x Electrode to Deliver Superior Areal/Volumetric/Gravimetric Capacitance

Lv,

Dai,

Qiao

et al. 2023

ACS Appl. Mater. Interfaces

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Challenges remain to show good capacitive performance while achieving high loadings of active materials for supercapacitors. Trying to realize this version, a nickel-protecting carbon fiber paper@Co-doped NiS x (Ni-CP@Co−NiS x ) electrode with high specific gravimetric, areal, and volumetric capacitance is reported in this work. This free-standing electrode is prepared by an electroplating-hydrothermal-electroplating (EHE) three-step method to achieve a high loading of almost 26.7 mg cm −2 . The cobalt-doping and nickel-protection strategies effectively decrease the impedance and inhibit the active material dropping from the electrode resulting from the expansion stress, which endows the Ni-CP@Co−NiS x electrode with a high rate and good cycling performance, especially with an ultrahigh specific areal/volumetric/gravimetric capacitance of 53.3 F cm −2 /2807 F cm −3 /1997 F g −1 at 5 mA cm −2 , respectively. Employing activated carbon functionalized with riboflavin (AC/VB2) as a negative electrode, the asymmetric supercapacitor device delivers a very high energy density of up to 60.4 W h kg −1 . This work demonstrates that electrodes with a high loading density and excellent performance can be obtained by the combination of the EHE method to adjust the internal conductivity and external structural stability.

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“…102 Besides, a mathematical simulation method was proposed to obtain the optimal mass-ratio via simulating the energy density of the SC device based on the positive/negative electrode electrochemical performances tested in three-electrode systems. 41 For microsupercapacitors (μSCs) with interdigitated laser-induced graphene electrodes and [PYR14][TFSI] ionic liquid electrolyte, Zaccagnini et al developed a new chargebalancing (mass-balancing) method for the first time: a threeelectrode setup was designed and constructed to evaluate the single electrode properties, which were used to determine an optimal areal ratio (A + /A − ) of positive to negative electrodes for a μSC device. The charge-balanced μSC showed an improved performance: an increased lifetime of a factor of 4 and a raised energy efficiency of above 80%.…”

Section: Practice Guidelines For the Mass-balancingmentioning

confidence: 99%

The Mass-Balancing between Positive and Negative Electrodes for Optimizing Energy Density of Supercapacitors

Jing,

Zhuo,

Sun

et al. 2024

J. Am. Chem. Soc.

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Supercapacitors (SCs) are some of the most promising energy storage devices, but their low energy density is one main weakness. Over the decades, superior electrode materials and suitable electrolytes have been widely developed to enhance the energy storage ability of SCs. Particularly, constructing asymmetric supercapacitors (ASCs) can extend their electrochemical stable voltage windows (ESVWs) and thus achieve high energy density. However, only full utilization of the electrochemical stable potential windows (ESPWs) of both positive and negative electrodes can endow the ASC devices with a maximum ESVW by using a suitable mass-ratio between two electrodes (the mass-balancing). Nevertheless, insufficient attention is directed to mass-balancing, and even numerous misunderstandings and misuses have appeared. Therefore, in this Perspective, we focus on the mass-balancing: summarize theoretic basis of the mass-balancing, derive relevant relation equations, analyze and discuss the change trends of the specific capacitance and energy density of ASCs with mass-ratios, and finally recommend some guidelines for the normative implementation of the mass-balancing. Especially, the issues related to pseudocapacitive materials, hybrid devices, and different open circuit potentials (OCPs) of the positive and negative electrodes in the mass-balancing are included and emphasized. These analyses and guidelines can be conducive to understanding and performing mass-balancing for developing high-performance SCs.

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Functional combination of methylene blue and porous carbon mutually promotes to deliver ultrahigh rate capacitive and energy storage performance

Cited by 17 publications

References 56 publications

Sputtered binder-free Cu₃N electrode materials for high-performance quasi-solid-state asymmetric supercapacitors

Sputtered binder-free Cu₃N electrode materials for high-performance quasi-solid-state asymmetric supercapacitors

Anti-Shedding Nickel-Protection-Layer Boosting an Ultrahigh Loading Carbon Fiber@Co–NiS_x Electrode to Deliver Superior Areal/Volumetric/Gravimetric Capacitance

The Mass-Balancing between Positive and Negative Electrodes for Optimizing Energy Density of Supercapacitors

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Functional combination of methylene blue and porous carbon mutually promotes to deliver ultrahigh rate capacitive and energy storage performance

Cited by 17 publications

References 56 publications

Sputtered binder-free Cu3N electrode materials for high-performance quasi-solid-state asymmetric supercapacitors

Sputtered binder-free Cu3N electrode materials for high-performance quasi-solid-state asymmetric supercapacitors

Anti-Shedding Nickel-Protection-Layer Boosting an Ultrahigh Loading Carbon Fiber@Co–NiSx Electrode to Deliver Superior Areal/Volumetric/Gravimetric Capacitance

The Mass-Balancing between Positive and Negative Electrodes for Optimizing Energy Density of Supercapacitors

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Sputtered binder-free Cu₃N electrode materials for high-performance quasi-solid-state asymmetric supercapacitors

Sputtered binder-free Cu₃N electrode materials for high-performance quasi-solid-state asymmetric supercapacitors

Anti-Shedding Nickel-Protection-Layer Boosting an Ultrahigh Loading Carbon Fiber@Co–NiS_x Electrode to Deliver Superior Areal/Volumetric/Gravimetric Capacitance