Electrochemical Performance of Prussian Blue and Analogues in Aqueous Rechargeable Batteries

Multiple Prussian-blue analogues/NF composites were successfully fabricated through a one-pot chemical etching and growing process. The target materials NiCoxFe1−x-PBA/NF exhibited excellent electrochemical performance.

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Energy-Density Improvement in Li-Ion Rechargeable Batteries Based on LiCoO2 + LiV3O8 and Graphite + Li-Metal Hybrid Electrodes

Materials ◽

10.3390/ma12122025 ◽

2019 ◽

Vol 12 (12) ◽

pp. 2025

Author(s):

Ki Yoon Bae ◽

Sung Ho Cho ◽

Byung Hyuk Kim ◽

Byung Dae Son ◽

Woo Young Yoon

Keyword(s):

Energy Density ◽

Electrochemical Performance ◽

Discharge Capacity ◽

Electrochemical Impedance ◽

Rechargeable Batteries ◽

Battery System ◽

X Ray ◽

Metal Anode ◽

Synthesis Conditions ◽

A Cell

We developed a novel battery system consisting of a hybrid (LiCoO2 + LiV3O8) cathode in a cell with a hybrid (graphite + Li-metal) anode and compared it with currently used systems. The hybrid cathode was synthesized using various ratios of LiCoO2:LiV3O8, where the 80:20 wt% ratio yielded the best electrochemical performance. The graphite and Li-metal hybrid anode, the composition of which was calculated based on the amount of non-lithiated cathode material (LiV3O8), was used to synthesize a full cell. With the addition of LiV3O8, the discharge capacity of the LiCoO2 + LiV3O8 hybrid cathode increased from 142.03 to 182.88 mA h g−1 (a 28.76% improvement). The energy density of this cathode also increased significantly, from 545.96 to 629.24 W h kg−1 (a 15.21% improvement). The LiCoO2 + LiV3O8 hybrid cathode was characterized through X-ray diffraction analysis, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. Its electrochemical performance was analyzed using a battery-testing system and electrochemical impedance spectroscopy. We expect that optimized synthesis conditions will enable the development of a novel battery system with an increase in energy density and discharge capacity.

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Electrochemical Performance of Mg x V2(PO4)3 As Cathode Material for Mg Rechargeable Batteries

ECS Meeting Abstracts ◽

10.1149/ma2014-04/2/318 ◽

2014 ◽

Keyword(s):

Electrochemical Performance ◽

Cathode Material ◽

Rechargeable Batteries

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Effects of Polymeric Layers on Li Depletion and Electrochemical Performance of Li-O2 Rechargeable Batteries

ECS Meeting Abstracts ◽

10.1149/ma2016-03/2/366 ◽

2016 ◽

Keyword(s):

Electrochemical Performance ◽

Rechargeable Batteries

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Nanohollow Carbon for Rechargeable Batteries: Ongoing Progresses and Challenges

Nano-Micro Letters ◽

10.1007/s40820-020-00521-2 ◽

2020 ◽

Vol 12 (1) ◽

Author(s):

Jiangmin Jiang ◽

Guangdi Nie ◽

Ping Nie ◽

Zhiwei Li ◽

Zhenghui Pan ◽

...

Keyword(s):

Electrochemical Performance ◽

Carbon Nanostructures ◽

Active Sites ◽

Electrode Materials ◽

Mechanical Stability ◽

High Surface ◽

Specific Capacity ◽

Rate Capability ◽

Lithium Ion ◽

Rechargeable Batteries

AbstractAmong the various morphologies of carbon-based materials, hollow carbon nanostructures are of particular interest for energy storage. They have been widely investigated as electrode materials in different types of rechargeable batteries, owing to their high surface areas in association with the high surface-to-volume ratios, controllable pores and pore size distribution, high electrical conductivity, and excellent chemical and mechanical stability, which are beneficial for providing active sites, accelerating electrons/ions transfer, interacting with electrolytes, and giving rise to high specific capacity, rate capability, cycling ability, and overall electrochemical performance. In this overview, we look into the ongoing progresses that are being made with the nanohollow carbon materials, including nanospheres, nanopolyhedrons, and nanofibers, in relation to their applications in the main types of rechargeable batteries. The design and synthesis strategies for them and their electrochemical performance in rechargeable batteries, including lithium-ion batteries, sodium-ion batteries, potassium-ion batteries, and lithium–sulfur batteries are comprehensively reviewed and discussed, together with the challenges being faced and perspectives for them.

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Framework Structures for Mg Battery Cathodes

Materials Science Forum ◽

10.4028/www.scientific.net/msf.879.2150 ◽

2016 ◽

Vol 879 ◽

pp. 2150-2152

Author(s):

Shunsuke Yagi ◽

Masaaki Fukuda ◽

Tetsu Ichitsubo ◽

Eiichiro Matsubara

Keyword(s):

Prussian Blue ◽

Room Temperature ◽

Active Material ◽

Electrochemical Quartz Crystal Microbalance ◽

High Energy ◽

Rechargeable Batteries ◽

High Energy Density ◽

Active Materials ◽

Large Space ◽

Extraction Behavior

Rechargeable Mg batteries have received intensive attention as affordable rechargeable batteries with high electromotive force, high energy density, and high safety. Mg possesses two valence electrons and has the lowest standard electrode potential (ca. -2.36 V vs. SHE) among the air-stable metals. There is another advantage that Mg metal can be used as an active material because Mg metal hardly forms dendrites. However, the slow diffusion of Mg ions in solid crystals prevents the realization of active materials for Mg rechargeable batteries at room temperature. Although some complex oxides have been reported to work as active materials at higher temperatures, Chevrel compounds are still the gold standards, which work at room temperature. However, the working voltage of the Mg battery using a Chevrel compound for the cathode is only ca. 1.2 V, which is far below that of Li-ion batteries (3-5 V). Nevertheless, Chevrel compounds have the significant advantage that a relatively large space exists in the crystal structure, which allows for fast Mg ion diffusion. In the present study, we investigated some materials with framework structures as cathodes for Mg batteries, which can alleviate the electrostatic constraint between Mg ions and cathode constituents. Specifically, we investigated the redox behavior of the thin films of Prussian blue and Prussian blue analogues in electrolytes containing an Mg salt using electrochemical quartz crystal microbalance and X-ray absorption spectroscopy. In addition, we discuss the electrochemical insertion/extraction behavior of Mg ions and their solvation structures.

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