Mesoporous-assembled MnO2 with large specific surface area

Zhang, Gaini; Ren, Lijun; Yan, Zhe; Kang, Liping; Lei, Zhibin; Xu, Hua; Shi, Feng; Liu, Zong–Huai

doi:10.1039/c5ta03326h

Cited by 18 publications

(15 citation statements)

References 29 publications

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“…6A) conrm that the CNPs/UCF hybrids have a mesoporous structure and hence having a large specic surface area, which is very benecial to the enhanced electrochemical energy storage as the surface area is directly proportional to the capacitance of supercapacitor electrodes. 53 The supercapacitors with a large electrode specic surface area are found to deliver high specic capacitances. 54 The total pore volume of CNPs/UCF hybrids is 0.541 cm 3 g À1 for pores smaller than 1596.9 Å (radius) at P/P o ¼ 0.994.…”

Section: Resultsmentioning

confidence: 99%

Hierarchically mesoporous carbon nanopetal based electrodes for flexible supercapacitors with super-long cyclic stability

2015

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Section: Resultsmentioning

confidence: 99%

Hierarchically mesoporous carbon nanopetal based electrodes for flexible supercapacitors with super-long cyclic stability

2015

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“…Apparently, curves of MnO2-1h, MnO2-2h, and MnO2-5h are distorted with redox peaks, which are attributed to the Faradaic reactions of redox-active MnO2. 45 The specific capacitance (Cs, F g −1 ) can be calculated in terms of the enclosed areas in CV curves by using Eqn. (5),…”

Section:  Results and Discussionmentioning

confidence: 99%

Tailorable Phase and Structural MnO2 as Electrode for Highly Efficient Hybrid Capacitive Desalination (HCDI)

Jin¹,

Li²,

Tang³

et al. 2019

Preprint

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Hybrid capacitive deionization (HCDI) is an emerging and promising technology for water desalination and has been extensively explored in recent years. Designing a structure tailorable electrode material has been proved to be a valid strategy for achieving a higher salt adsorption capacity (SAC). In this study, <a></a><a>MnO2 materials with tailorable phase compositions and regulatory microstructures were prepared hydrothermally and then evaluated as electrodes for removal of ions from NaCl solution in a membrane-free HCDI cell.</a> MnO2 electrode materials tested in HCDI system include poorly crystalline δ-MnO2 with a lot of amorphous phases (MnO2-1h), crystalline δ-MnO2 with amorphous MnO2 (MnO2-2h), MnO2 mixtures of α-, δ-, and amorphous MnO2 (MnO2-5h), and <a></a><a>α-MnO2 nanowire</a> with minor amorphous MnO2 (MnO2-12h). It is notable that the phase composition along with the microstructures of MnO2 materials rather than their surface areas determines the SAC values. When the cell voltage is 1.2 V, the <a></a><a>lamellar</a> structured MnO2-1h electrode demonstrates the highest SACs of 13.84 mg g-1 in 100 mg L-1 NaCl, and 21.32 mg g-1 in 500 mg L-1 NaCl solution, respectively. The desalination efficiencies are remarkable and far greater than other MnO2-based electrodes under similar conditions (e.g., NaCl concentrations, cell voltage, etc.). This study sheds light on the significance of understanding the fundamental of both phase composition and microstructure in governing the desalination performance of MnO2 electrodes.

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“…† It can be seen that the XRD pattern of the Cu/RGO ber exhibits a broad peak at 25.3 , corresponding to the (002) plane of the stacked reduced graphene sheets. 33 The XRD patterns of the Cu/RGO/MnO 2 bers obtained from different amounts of coated MnO 2 indicate that a weak typical diffraction peak at 12.3 corresponding to the (001) plane of d-MnO 2 can be indexed except the diffraction peak around 25.3 for the Cu/RGO ber, 34 suggesting that d-MnO 2 with a layered structure is formed on the surface of the Cu/RGO ber. Moreover, the peak intensity hardly changes with The birnessite-type structure of the formed d-MnO 2 on the surface of the Cu/RGO ber is further conrmed by the Raman spectra (Fig.…”

Section: Resultsmentioning

confidence: 99%

Highly flexible all-solid-state cable-type supercapacitors based on Cu/reduced graphene oxide/manganese dioxide fibers

et al. 2017

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Mesoporous-assembled MnO₂ with large specific surface area

Abstract: Mesoporous MnO2 with a surface area of 456 m2 g−1 is prepared by heating a delaminated MnO2 nanosheet slurry with NH4HSO4.

Cited by 18 publications

References 29 publications

Hierarchically mesoporous carbon nanopetal based electrodes for flexible supercapacitors with super-long cyclic stability

Hierarchically mesoporous carbon nanopetal based electrodes for flexible supercapacitors with super-long cyclic stability

Tailorable Phase and Structural MnO2 as Electrode for Highly Efficient Hybrid Capacitive Desalination (HCDI)

Highly flexible all-solid-state cable-type supercapacitors based on Cu/reduced graphene oxide/manganese dioxide fibers

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