One-pot hydrothermal preparation of hierarchical manganese oxide nanorods for high-performance symmetric supercapacitors

Pandit, Bidhan; Goda, Emad S.; Elella, Mahmoud H. Abu; Rehman, Aafaq ur; Hong, Sang Eun; Rondiya, Sachin R.; Barkataki, Pranay; Shaikh, Shoyebmohamad F.; Al-Enizi, Abdullah M.; El‐Bahy, Salah M.; Yoon, Kuk Ro

doi:10.1016/j.jechem.2021.05.028

Cited by 115 publications

(21 citation statements)

References 80 publications

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“…The use of transition metal oxides (TMOs) [ 1 ], hydroxides [ 2 ], sulfides [ 3 ], selenides [ 4 ], carbides [ 5 ], and their composites with conductive carbon and polymers [ 6 ], as possible electrode materials for ASCs, has been attempted. Particularly, TMOs, such as NiO [ 7 ], MoO 3 [ 8 ], Co 3 O 4 [ 9 ], and MnO 2 [ 10 ], have received considerable attention due to their low cost, convenience of synthesis, environmental friendliness, and relatively high capacitance. Compared to binary TMOs, ternary TMOs materials containing two different metal cations, such as NiCo 2 O 4 [ 11 ], ZnCo 2 O 4 [ 12 , 13 ], CoMoO 4 [ 14 ], MnMoO 4 [ 15 ], and NiMoO 4 [ 16 ], as well as some solid solutions [ 17 ], exhibit higher electrochemical activity due to the rich redox reactions stemming from the multiple oxidation states of the transition-metal components.…”

Section: Introductionmentioning

confidence: 99%

Synchronous Defect and Interface Engineering of NiMoO4 Nanowire Arrays for High-Performance Supercapacitors

et al. 2022

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Developing high-performance electrode materials is in high demand for the development of supercapacitors. Herein, defect and interface engineering has been simultaneously realized in NiMoO4 nanowire arrays (NWAs) using a simple sucrose coating followed by an annealing process. The resultant hierarchical oxygen-deficient NiMoO4@C NWAs (denoted as “NiMoO4−x@C”) are grown directly on conductive ferronickel foam substrates. This composite affords direct electrical contact with the substrates and directional electron transport, as well as short ionic diffusion pathways. Furthermore, the coating of the amorphous carbon shell and the introduction of oxygen vacancies effectively enhance the electrical conductivity of NiMoO4. In addition, the coated carbon layer improves the structural stability of the NiMoO4 in the whole charging and discharging process, significantly enhancing the cycling stability of the electrode. Consequently, the NiMoO4−x@C electrode delivers a high areal capacitance of 2.24 F cm−2 (1720 F g−1) at a current density of 1 mA cm−2 and superior cycling stability of 84.5% retention after 6000 cycles at 20 mA cm−2. Furthermore, an asymmetric super-capacitor device (ASC) has been constructed with NiMoO4−x@C as the positive electrode and activated carbon (AC) as the negative electrode. The as-assembled ASC device shows excellent electrochemical performance with a high energy density of 51.6 W h kg−1 at a power density of 203.95 W kg−1. Moreover, the NiMoO4//AC ASC device manifests remarkable cyclability with 84.5% of capacitance retention over 6000 cycles. The results demonstrate that the NiMoO4−x@C composite is a promising material for electrochemical energy storage. This work can give new insights on the design and development of novel functional electrode materials via defect and interface engineering through simple yet effective chemical routes.

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Section: Introductionmentioning

confidence: 99%

Synchronous Defect and Interface Engineering of NiMoO4 Nanowire Arrays for High-Performance Supercapacitors

et al. 2022

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“…The band observed at 1052 cm –1 is mainly due to −CO bonds as a result of exposure to atmospheric carbon and oxygen species . Moreover, the presence of bands at 1115 and 1348 cm –1 could be ascribed to CO 3 . − The bands at 1433 and 1250 cm –1 could be ascribed to the C–H bending vibrations . The Raman spectroscopy of the Ni–Mn based electrode is shown in Figure S3.…”

Section: Resultsmentioning

confidence: 99%

“…Among them, supercapacitors are gaining popularity for space applications as they significantly overcome various serious limitations of lithium (Li)-ion batteries and are capable of withstanding the harsh environmental conditions encountered in space. , Moreover, the performance of supercapacitors with the decrease in temperature does not decline much in comparison to the currently used Li-ion batteries. Supercapacitors exhibit unique characteristics such as high power, long cycle life as well as eco-friendly nature, acting as a bridge between conventional capacitors (high power), − and batteries/fuel cells [good energy density (ED)] in terms of energy-power difference. − Some significant advantages of a supercapacitor are high power density (PD), high capacitance, low internal series resistance, broad operating temperature range, and negligible change in internal resistance with time, thus exhibiting high charging and discharging cycle life. − These excellent characteristics make supercapacitors promising for space applications, especially in small satellites …”

Section: Introductionmentioning

confidence: 99%

Thermoelectric-Powered Supercapacitors Based on Ni–Mn Nanowires Driven by Quadripartite Electrolyte

Verma

Padha

Arya

2022

ACS Appl. Energy Mater.

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Thermal energy is copiously available, especially low-grade heat which is typically wasted as a byproduct without use. Tapping into this immense energy reservoir with cost-effective technologies may become a key element for an energy-sustainable economy and society. The utilization of this waste thermal energy holds great potential in space applications for generating electric energy without using a solar panel. With this approach of harvesting heat energy, Ni−Mn composite nanowire-based electrodes synthesized via the electrochemical deposition technique are used to assemble a thermoelectric-powered supercapacitor. For charging purpose, the thermoelectric phenomenon of a quadripartite gel electrolyte [K 3 Fe(CN) 6 + K 4 Fe(CN) 6 + KOH + PVA] is tested. High-grade flexible copper tape used as a substrate can withstand high temperature and is perfectly suitable for thermoelectric devices. The fabricated symmetric device attained a high specific capacitance of 556 F/g at 4 mA in addition to a high energy density of 173.75 W h/kg at 3 kW/kg. Moreover, the fabricated thermoelectric-powered device attains a maximum voltage of ∼60 mV as a result of a temperature difference in the range of 8−10 °C. The proposed supercapacitor offers opportunities for the development of future devices that simultaneously harvest and store energy.

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“…Leakage resistance (R L ) is demonstrated to be an indicator of the leakage current across the electrode-electrolyte interface ( Pandit & Sankapal, 2021 ). Further, other essential parameters like energy density (E d ) and power density (P d ) have been determined with the help of ( Pandit et al, 2022a ; Pandit et al, 2022 ):

where E d and P d are measure in Wh/kg and W/kg units, respectively ( Wang et al, 2018 ),

is discharge time. The highest E d has been obtained by 15% are ∼24 Wh/kg @ 1 A/g current density and P d was ∼180 W/kg as displayed in Figure 6D .…”

Section: Resultsmentioning

confidence: 99%

Reduced graphene oxide doped tellurium nanotubes for high performance supercapacitor

et al. 2022

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One-pot hydrothermal preparation of hierarchical manganese oxide nanorods for high-performance symmetric supercapacitors

Cited by 115 publications

References 80 publications

Synchronous Defect and Interface Engineering of NiMoO4 Nanowire Arrays for High-Performance Supercapacitors

Synchronous Defect and Interface Engineering of NiMoO4 Nanowire Arrays for High-Performance Supercapacitors

Thermoelectric-Powered Supercapacitors Based on Ni–Mn Nanowires Driven by Quadripartite Electrolyte

Reduced graphene oxide doped tellurium nanotubes for high performance supercapacitor

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