Mn (OH)2 electrodeposited on secondary porous Ni nano-architecture foam as high-performance electrode for supercapacitors

Xu, Guiyin; Xie, Chipeng; Wen, Ya; Tang, Anping; Song, Haishen

doi:10.1007/s11581-018-2824-8

Cited by 16 publications

(6 citation statements)

References 55 publications

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“…The rate performance of the product is shown in Figure 4 c. Mn(OH) 2 delivered excellent reversible rate capacities of 146.3, 128.5, 114.2, 101.4, 94.5 and 88.2 Ma h g −1 at the current densities of 0.1, 0.2, 0.3, 0.5, 0.7 and 1.0 Ag −1 , respectively. The value is comparable to an MnO 2 nanofiber [ 29 ], Mn(OH) 2 @ porous Ni [ 38 ], V 2 O 5 /CNT [ 21 ] and PANi [ 25 ]. More importantly, when the rate returns to 0.1 Ag −1 , the specific capacity of the sample retains 94.8% of the initial capacity, indicating good layer structure stability and excellent electrochemical reversibility.…”

Section: Resultsmentioning

confidence: 86%

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The Synthesis of Manganese Hydroxide Nanowire Arrays for a High-Performance Zinc-Ion Battery

et al. 2022

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The morphology, microstructure as well as the orientation of cathodic materials are the key issues when preparing high-performance aqueous zinc-ion batteries (ZIBs). In this paper, binder-free electrode Mn(OH)2 nanowire arrays were facilely synthesized via electrodeposition. The nanowires were aligned vertically on a carbon cloth. The as-prepared Mn(OH)2 nanowire arrays were used as cathode to fabricate rechargeable ZIBs. The vertically aligned configuration is beneficial to electron transport and the free space between the nanowires can provide more ion-diffusion pathways. As a result, Mn(OH)2 nanowire arrays yield a high specific capacitance of 146.3 Ma h g−1 at a current density of 0.5 A g−1. They also demonstrates ultra-high diffusion coefficients of 4.5 × 10−8~1.0 × 10−9 cm2 s−1 during charging and 1.0 × 10−9~2.7 × 10−11 cm−2 s−1 during discharging processes, which are one or two orders of magnitude higher than what is reported in the studies. Furthermore, the rechargeable Zn//Mn(OH)2 battery presents a good capacity retention of 61.1% of the initial value after 400 cycles. This study opens a new avenue to boost the electrochemical kinetics for high-performance aqueous ZIBs.

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Section: Resultsmentioning

confidence: 86%

“…The Mn(OH) 2 nanowire arrays were prepared on CC through a facile electrodeposition method, in which SDS was used as a templating agent. The electrodeposition of manganese hydroxide proceeded through the following reactions [ 38 ]: NO 3 − + 7H 2 O + 8e − → NH 4 + + 10OH − Mn 2+ + 2OH − → Mn(OH) 2 …”

Section: Resultsmentioning

confidence: 99%

The Synthesis of Manganese Hydroxide Nanowire Arrays for a High-Performance Zinc-Ion Battery

et al. 2022

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“…Next, the Nyquist plots of B‐AC3 and L‐AC3 in 0.06 wt% CDs/molasses/H 2 SO 4 electrolyte (B‐AC3_CD and L‐AC3_CD) were obtained and compared with those of B‐AC1, L‐AC1, B‐AC3, L‐AC3 in molasses/H 2 SO 4 electrolyte as shown in Fig 10c and d. Focusing on the low‐frequency region, adding the CDs to the electrolyte (B‐AC3_CD and L‐AC3_CD, red curves) gave the most vertical lines, suggesting the most EDLC behavior and the lowest resistance and leakage current, compared to the systems without the CDs (blue and green curves) [57–59] . The curves of thiourea‐doped electrodes are also more vertical than those of the undoped electrodes, indicating the lower resistance and leakage current.…”

Section: Resultsmentioning

confidence: 99%

“…Focusing on the low-frequency region, adding the CDs to the electrolyte (B-AC3_CD and L-AC3_CD, red curves) gave the most vertical lines, suggesting the most EDLC behavior and the lowest resistance and leakage current, compared to the systems without the CDs (blue and green curves). [57][58][59] The curves of thiourea-doped electrodes are also more vertical than those of the undoped electrodes, indicating the lower resistance and leakage current. These results confirmed that thiourea doping and the addition of CDs lowered the system resistance and leakage current and improved the supercapacitance performance through their unique surface functionality and nanometer size that facilitate interfacial interactions and charge transfer processes.…”

Section: Chemistryselectmentioning

confidence: 99%

High‐Performance Supercapacitors Fabricated from Sugarcane Waste‐derived Activated Carbon Electrodes and Carbon Dot‐added Molasses as Electrolytes

et al. 2022

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In this work, bio‐renewable, high‐performance supercapacitors were prepared from sugarcane wastes. Activated carbon and carbon dots (CDs) was prepared from sugarcane bagasse and leaves, whereas electrolyte, for the first time in any kind of electrochemical device, was prepared from molasses. The supercapacitors were then fabricated from activated carbon electrodes and molasses electrolyte. The supercapacitors using bagasse‐ and leaf‐derived activated carbon and molasses aqueous solution yielded a specific capacitance of 101 and 80 F g−1, respectively, at a scan rate of 30 mV s−1. When the molasses electrolyte was prepared in H2SO4 solution, the specific capacitance increased to 308 and 268 F g−1, respectively. Interestingly, when the CDs were added to molasses/H2SO4 electrolyte, the specific capacitance was further boosted to 456 and 356 F g−1, which are equivalent to 148 % and 133 % increases. In addition to enhancing the specific capacitance, the use of CDs also improved the cycling stability of the supercapacitors. A combination of enhanced surface capacitance and reduced interfacial resistance offered by the CDs led to a significantly enhanced performance. This work thus demonstrates a value‐adding strategy for sugarcane wastes and the fabrication of novel, high‐performance supercapacitors.

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“…The characteristic peaks of rGO, including C-O (alkoxy) in the range of 1065-1086 cm −1 and C-OH (carboxyl) in the range of 1406-1409 cm −1 , can be observed in all the electrode samples. 49 The weak bonds ranging from 3186 to 3188 cm −1 are related to the O-H stretching for all the synthesized samples. The absorption bands at 515, 585, and 618 cm −1 are associated with bending vibrations of Ni-OH, Mn-OH, and Co-OH in rGO/Ni-OH, rGO/ Mn-OH, and rGO/Co-OH electrodes, respectively.…”

Section: Morphology and Crystalline Structure Of The Synthesized Elec...mentioning

confidence: 90%

A 3D binder-free rGO/NiMnCo nanosheet for highly efficient hybrid supercapacitors and ion-selective capacitive deionization

Delfani,

Habibzadeh,

Pourdayan

et al. 2024

J. Mater. Chem. A

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Mn (OH)2 electrodeposited on secondary porous Ni nano-architecture foam as high-performance electrode for supercapacitors

Cited by 16 publications

References 55 publications

The Synthesis of Manganese Hydroxide Nanowire Arrays for a High-Performance Zinc-Ion Battery

The Synthesis of Manganese Hydroxide Nanowire Arrays for a High-Performance Zinc-Ion Battery

High‐Performance Supercapacitors Fabricated from Sugarcane Waste‐derived Activated Carbon Electrodes and Carbon Dot‐added Molasses as Electrolytes

A 3D binder-free rGO/NiMnCo nanosheet for highly efficient hybrid supercapacitors and ion-selective capacitive deionization

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