Facile fabrication of polyaniline@γ-MnOOH on a buckypaper ternary composite electrode for free-standing supercapacitors

Xia, Lichen; Pan, Lujun; Asif, Muhammad; Zhang, Dongmei; Usman, Muhammad; Yang, Sijia; Zhou, Nan; Hu, Yan; Bin, Yuezhen

doi:10.1039/c7ra08431e

Cited by 16 publications

(2 citation statements)

References 36 publications

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“…The energy separation of 5.29 eV in D-b-MnO 2 is wider than that (4.55 eV) of commercial b-MnO 2 (Figure 3G), suggesting a lower average valence of Mn in D-b-MnO 2 (Cheng et al, 2013), which may be caused by the oxygen deficiency. The Raman spectra of the two samples showed a Mn-O vibration peak centered at 649 cm À1 (Xia et al, 2017). However, compared with the commercial b-MnO 2 sample, there is a reduction of the intensity of the Mn-O vibration peak in D-b-MnO 2 , indicating a decreased content of Mn-O bond caused by the oxygen defects (Figure S5).…”

Section: Structure Identification and Characterization Of B-mnomentioning

confidence: 96%

Oxygen Defects in β-MnO2 Enabling High-Performance Rechargeable Aqueous Zinc/Manganese Dioxide Battery

et al. 2020

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Rechargeable aqueous Zn/manganese dioxide (Zn/MnO 2 ) batteries are attractive energy storage technology owing to their merits of low cost, high safety, and environmental friendliness. However, the b-MnO 2 cathode is still plagued by the sluggish ion insertion kinetics due to the relatively narrow tunneled pathway. Furthermore, the energy storage mechanism is under debate as well. Here, b-MnO 2 cathode with enhanced ion insertion kinetics is introduced by the efficient oxygen defect engineering strategy. Density functional theory computations show that the b-MnO 2 host structure is more likely for H + insertion rather than Zn 2+ , and the introduction of oxygen defects will facilitate the insertion of H + into b-MnO 2 . This theoretical conjecture is confirmed by the capacity of 302 mA h g À1 and capacity retention of 94% after 300 cycles in the assembled aqueous Zn/ b-MnO 2 cell. These results highlight the potentials of defect engineering as a strategy of improving the electrochemical performance of b-MnO 2 in aqueous rechargeable batteries.

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Section: Structure Identification and Characterization Of B-mnomentioning

confidence: 96%

Oxygen Defects in β-MnO2 Enabling High-Performance Rechargeable Aqueous Zinc/Manganese Dioxide Battery

et al. 2020

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“…In 6 M KOH, it performs a power density of 12800 W kg −1 at energy density of 10.7 Wh kg −1 , with no decay of specific capacitance after cycling for 5000 times [23]. Lujun Pan fabricated polyaniline and γ-MnOOH composite on a buckypaper, it shows a maximum specific capacitance of 567.5 F g -1 at a current density of 0.5 A g -1 [24]. However, after 5000 cycles charging and discharging, only 77.2% specific capacitance remains.…”

Section: Mnooh Materialsmentioning

confidence: 99%

Manganese-Containing Supercapacitors for Future Energy Storage

Li¹,

Zhang²,

Li³

2018

dteees

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Due to the fast developing demand for storing new energy, as well as the practical need of the growing smart grid technologies, many researchers engage in nanoparticles to explore their energy storage potential. Supercapacitors become very popular in the past two decades for their high power density and long-term cycling stability. Manganese-containing electrode materials show many advantages in asymmetric supercapacitor devices. In this review, we will both provide a facile practice of building asymmetric supercapacitors in the lab and list some latest results in the field of Mn-containing electrode materials and find out the challenges that still lie there. From the review work, we hope to attract more material and energy system researchers to pay attention to these materials, make our contribution together and bring a brighter future to energy storage.

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The use of α-MnOOH nanosheets as battery-type electrode for supercapacitor applications

Yeşilbağ

Tuzluca

Ertuğrul

2019

J Mater Sci: Mater Electron

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Facile fabrication of polyaniline@γ-MnOOH on a buckypaper ternary composite electrode for free-standing supercapacitors

Abstract: Ternary composites as electrode materials have attracted extensive attention. Herein, we demonstrated a facile two-step method to construct a new hierarchical nanocomposite by combing buckypaper (BP) with γ-MnOOH nanorods and polyaniline.

Cited by 16 publications

References 36 publications

Oxygen Defects in β-MnO2 Enabling High-Performance Rechargeable Aqueous Zinc/Manganese Dioxide Battery

Oxygen Defects in β-MnO2 Enabling High-Performance Rechargeable Aqueous Zinc/Manganese Dioxide Battery

Manganese-Containing Supercapacitors for Future Energy Storage

The use of α-MnOOH nanosheets as battery-type electrode for supercapacitor applications

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