Size-controlled Chevrel Mo<sub>6</sub>S<sub>8</sub>as Cathode Material for Mg Rechargeable Battery

Ryu, Anna; Park, Min; Cho, Woosuk; Kim, Jeom-Soo; Kim, Young‐Jun

doi:10.5012/bkcs.2013.34.10.3033

Cited by 15 publications

(7 citation statements)

References 13 publications

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“…CP nanofibers with diameters in the 100-300 nm range have also been synthesized from a solgel technique, although their electrochemical performance has not be reported [146]. Ryu et al [148] also found that controlling the ratio of KCl salt to precursor material in a molten salt synthetic reaction can be used to control the size and electrochemical properties of the product CP. Median diameters of 0.24, 0.57 and 0.75 μm were obtained for 4:1, 6:1 and 2:1 salt-to-precursor ratios (whether this is a weight or molar ratio was not specified).…”

Section: Cathode Materialsmentioning

confidence: 99%

Beyond Li-ion: electrode materials for sodium- and magnesium-ion batteries

2015

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to develop and install renewable energy harvesting technologies [3]. However, their successful implementation will be dependent on reliable and robust storage devices since harvesting solar and wind energy is inherently intermittent and the majority of consumption targets cannot be readily tethered to the grid.As energy storage devices, batteries possess high portability, high energy density, high Coulombic efficiency, and long cycle life. They are ideal power sources for portable devices, automobiles, and backup power supplies; accordingly, batteries power nearly all of our mobile electronics and are used to improve the efficiency of hybrid electric vehicles [4,5]. Unfortunately, considerable improvements in performance are still required in order to meet the demands of advanced portable devices and achieve energy sustainability (e.g., through smart grid and electric vehicle technologies) [6]. These enduring needs have driven intensive research investments. While efforts have been successful, there is still significant room for improvement regarding the development and understanding of electrode materials [7]. The overall capacity and potential cycling window of many electrode materials are limited to prevent degradation over long term cycling. In addition to exploring new electrode materials, there have been strong efforts to improve those that are already utilized. Expense reduction is a priority as approximately 23% and 8% of the overall battery pack costs stem from the respective cathode and anode active materials alone [8].An alkali-ion battery consists of several electrochemical cells connected in parallel and/or in series to provide a designated current or voltage. Each electrochemical cell has two electrodes separated by an electrolyte that is electrically insulating but ionically conductive. During discharge, when the alkali-ion battery operates as a galvanic cell, alkali ions exit the negative electrode (typically carbon) and insert themselves into the positive electrode while electronsThe need for economical and sustainable energy storage drives battery research today. While Li-ion batteries are the most mature technology, scalable electrochemical energy storage applications benefit from reductions in cost and improved safety. Sodium-and magnesium-ion batteries are two technologies that may prove to be viable alternatives. Both metals are cheaper and more abundant than Li, and have better safety characteristics, while divalent magnesium has the added bonus of passing twice as much charge per atom. On the other hand, both are still emerging fields of research with challenges to overcome. For example, electrodes incorporating Na + are often pulverized under the repeated strain of shuttling the relatively large ion, while insertion and transport of Mg 2+ is often kinetically slow, which stems from larger electrostatic forces. This review provides an overview of cathode and anode materials for sodium-ion batteries, and a comprehensive summary of research on cathodes for magnesium-ion batteries. In additi...

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Section: Cathode Materialsmentioning

confidence: 99%

Beyond Li-ion: electrode materials for sodium- and magnesium-ion batteries

2015

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“…Ryu et al investigated the relationship between Mo 6 S 8 particle size and the ratio of KCl salt with precursors. 25 Increasing the ratio of KCl melting salt from 1:1 to 4:1 decreased the particle size of CP from 0.75 to 0.24 μ m. Consequently, the initial discharge capacity changed from 73 to 85 mAh/g. Saha et al also tried to control the particle size through a co-precipitation method followed by a conventional calcination process.…”

Section: Chevral Phasementioning

confidence: 95%

Status and challenge of Mg battery cathode

Zhang¹,

Ling²

2016

MRS Energy & Sustainability

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Current performance of Mg battery cathode is reviewed. Perspective for research in this fi eld is provided and discussed.Mg battery has recently gathered more and more interest as a high energy density replacement of current Li-ion battery. Signifi cant progress has been made in developing sustainable anode and novel electrolyte. However, the success of Mg battery still high demands the search of cathode material with high energy density, good rate capability, and nice cyclability. This current review focuses on the development of Mg battery cathode in the past 15 years. A detailed review about the performance and limitations of reported cathode material is provided.A perspective for this area is discussed with insights for future research direction. Three important areas that must be explored in this fi eld in near future are suggested: the investigation of high capacity cathode, the study of hybrid ion battery, and deeper understanding about the magnesiation chemistry of the cathode.

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“…Other peaks also shift according to the triclinic structure (32°−48°graph of Figure 2c). 17,33 These structures have different bond lengths and angles depending on the distance between the Mo−Mo and Mo−S bonds, which form a system of open three-dimensional networks. In particular, the Mo 6 cluster, which has the form of an elongated octahedron with −3 symmetry in trigonal systems (rhombohedral and hexagonal structure), shows triclinic deformation in the triclinic phase transition.…”

Section: Characterization Of Cu 18 Mo 6 S 8 (Cu-cp)mentioning

confidence: 99%

Effect of the Crystalline Structure of Cu_xMo₆S₈ on the Capacity of Mg-Based Secondary Batteries

Kang

Bhoraskar

et al. 2022

ACS Appl. Energy Mater.

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Mo 6 S 8 Chevrel-phase (CP) cathode materials, for Mg secondary batteries, have been reported to be better suited and superior to other cathode materials. We synthesized Cu x Mo 6 S 8 (Cu-CP) by varying the temperature and time and found different crystalline structures of Cu-CP, depending on the time and temperature of the growth process. Using these structures as precursors for preparing cathodes was shown to influence the performance of the electrochemical cell. After etching Cu from Cu-CP, the structure was stabilized as the rhombohedral phase of Mo 6 S 8 (CP). The morphologies of Cu-CP and CP were examined by scanning electron microscopy, and the structures were confirmed using X-ray diffraction. The coin-cell structure was fabricated, and the electrochemical properties of CP were evaluated and compared for different crystalline structures of Cu-CP. The discharge capacities were improved from 84.2 to 122.9 mAh•g −1 as the structure of Cu-CP changed from rhombohedral to triclinic.

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Size-controlled Chevrel Mo₆S₈as Cathode Material for Mg Rechargeable Battery

Cited by 15 publications

References 13 publications

Beyond Li-ion: electrode materials for sodium- and magnesium-ion batteries

Beyond Li-ion: electrode materials for sodium- and magnesium-ion batteries

Status and challenge of Mg battery cathode

Effect of the Crystalline Structure of Cu_xMo₆S₈ on the Capacity of Mg-Based Secondary Batteries

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Size-controlled Chevrel Mo6S8as Cathode Material for Mg Rechargeable Battery

Cited by 15 publications

References 13 publications

Beyond Li-ion: electrode materials for sodium- and magnesium-ion batteries

Beyond Li-ion: electrode materials for sodium- and magnesium-ion batteries

Status and challenge of Mg battery cathode

Effect of the Crystalline Structure of CuxMo6S8 on the Capacity of Mg-Based Secondary Batteries

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Size-controlled Chevrel Mo₆S₈as Cathode Material for Mg Rechargeable Battery

Effect of the Crystalline Structure of Cu_xMo₆S₈ on the Capacity of Mg-Based Secondary Batteries