Sol–gel synthesis of K1.33Mn8O16 nanorods and their applications for aqueous K-ion hybrid supercapacitors

Jiang, Jianbo; Li, Junhua; Long, Xuanda; Zhao, Dan; Su, Kanda; Xv, Deyao; Yang, Chunming; Qian, Dong

doi:10.1016/j.materresbull.2018.09.024

Cited by 8 publications

(4 citation statements)

References 35 publications

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“…al. [202] via sol-gel method. The CV of the material shows two oxidization peaks at 0.222 and 0.705 V vs. saturated calomel electrode (SCE) together with two reduction peaks at 0.668 and 0.186 V vs. SCE, which indicates two steps reversible K + ion intercalation/deintercalation processes.…”

Section: Electrolyte Voltage [V]mentioning

confidence: 99%

Frontiers in Hybrid Ion Capacitors: A Review on Advanced Materials and Emerging Devices

et al. 2021

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Hybrid supercapacitors are the most desirable electrochemical energy storage devices, owing to their versatile and tunable performance characteristics, specifically in energy and power densities, towards applications in research and development. Construction‐wise, optimized assembly of batteries (energy devices) and supercapacitors (power devices) are the key for hybrid supercapacitors. Based on scientific advancements and technological achievements, hybrid ion capacitors are the most important segments in hybrid supercapacitors, as well as in the overall energy storage arena. Herein, opportunities and challenges of hybrid ion capacitors are intensively addressed in light of lithium‐ion, sodium‐ion, potassium‐ion, magnesium‐ion, calcium‐ion, zinc‐ion, and aluminum‐ion capacitors. The historical origins and their developmental pathways are identified for each type of capacitor. Possible classes of materials for every hybrid ion capacitor are discussed, and relevant mechanisms are demonstrated. These discussions reveal that a rich materials bank exists for lithium‐ion, sodium‐ion, and zinc‐ion capacitors, but the same is not applicable for potassium‐ion, magnesium‐ion, calcium‐ion, and aluminum‐ion capacitors. Consequently, such hybrid ion capacitors have not yet reached the level of commercial benchmarks like lithium‐ion, sodium‐ion, and zinc‐ion capacitors. However, this Review focuses on mostly full‐cell device data that synchronize the performances of practical scaled‐up systems. Several electrolytes based on solvent media (aqueous, organic, and ionic liquid), phase (liquid, gel, and solid), and redox activity (active and passive) are exemplified in different sections of hybrid ion capacitors. Various device constructions are elaborated upon, such as liquid‐electrolyte devices, polymeric gel devices, all‐solid‐state devices, flexible‐cum‐wearable devices, microdevices, solar‐charging devices, and so forth. The Review culminates with feasible future directions for the commercial success of hybrid ion capacitors, which are in the nascent stages of developments. To the best of our knowledge, it is the first holistic account of hybrid ion capacitors from their historical perspectives to present developments.

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Section: Electrolyte Voltage [V]mentioning

confidence: 99%

Frontiers in Hybrid Ion Capacitors: A Review on Advanced Materials and Emerging Devices

et al. 2021

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“…Potassium-ion batteries may provide a higher voltage than sodium-ion batteries, depending on if the voltage provided by the battery is equal to the potential difference between the positive and negative electrodes when other parameters are kept similar. Owing to natural abundance and low cost of potassium resources, potassium-ion batteries (PIBs) have recently captured growing interest as one of the most beneficial electric energy storage systems [12][13][14]. The really low redox potential (−2.94 V) of the K + /K couple contributes to the high work potential and energy density, which reveals a superior application prospect of PIBs for sustainable energy storage technology [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Low-Strain KVPO4F@C as Hyperstable Anode for Potassium-Ion Batteries

Liu

Wang

Zhang

et al. 2023

Metals

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Potassium-ion batteries with carbon-based materials and alloy materials as anodes possess pronounced potassium storage and cycling abilities, yet they suffer from harsh synthetic processes, low initial Coulombic efficiency, and limited structure stability. Herein, we first put forward potassium vanadium fluorophosphate (KVPO4F) as a highly stable anode material for potassium-ion batteries (PIBs). KVPO4F@C composite is successfully synthesized through hydrothermal method followed by a low-temperature roasting process. An amorphous carbon film is homogeneously wrapped on the surface of the KVPO4F particles to improve electronic conductivity. As the anode for PIBs, the KVPO4F@C presents a super-high discharge capacity of 242.32 mAh g−1 and a superior cycle stability over 120 cycles at 100 mA·g−1 with 93.1% capacity retention. Additionally, it maintains 92.9% of its initial capacity of 100 mA·g−1 at 1000 mA·g−1 after cycling 2100 times, which indicates an excellent long cycling performance. The in situ X-ray Diffraction and ex situ Transmission Electron Microscopy tests prove the minimal volume variation and stable structure of KVPO4F@C. The designed KVPO4F@C provides facilitative electronic conductivity and stable structure, successfully innovating an ultra-stable and high-performance anode material for potassium-ion batteries and other energy storage application fields.

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“…27 Therefore, the performance of MOs as supercapacitor electrodes is dominated by a specific surface area 27 and for this reason, nanostructured MOs are usually used as supercapacitor electrodes. Nanostructured electrodes can be prepared by different methods, for example, chemical and electrochemical methods, 18,28 electrophoretic deposition, 29 physical vapor deposition 30 sol-gel methods, 31,32 hydrothermal methods 33 and successive ionic layer adsorption and reaction methods. 34,35 Pulsed laser deposition (PLD) in the presence of a buffer gas has been reported as a versatile tool for fabricating nanoparticles and other nanostructures with controlled size.…”

Section: Introductionmentioning

confidence: 99%

Tuning the morphology of manganese oxide nanostructures for obtaining both high gravimetric and volumetric capacitance

et al. 2020

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Sol–gel synthesis of K1.33Mn8O16 nanorods and their applications for aqueous K-ion hybrid supercapacitors

Cited by 8 publications

References 35 publications

Frontiers in Hybrid Ion Capacitors: A Review on Advanced Materials and Emerging Devices

Frontiers in Hybrid Ion Capacitors: A Review on Advanced Materials and Emerging Devices

Low-Strain KVPO4F@C as Hyperstable Anode for Potassium-Ion Batteries

Tuning the morphology of manganese oxide nanostructures for obtaining both high gravimetric and volumetric capacitance

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