Rechargeable Batteries with 100% Cathode Active Materials─Conductive Vapor-Deposited Films of a Stable Organic Neutral Radical

2022 ◽  
Author(s):  
Tsuyoshi Murata ◽  
Shinji Nakanishi ◽  
Hideki Nakayama ◽  
Hiroshi Ito ◽  
Miwa Morita ◽  
...  
Keyword(s):  
Rechargeable Batteries ◽  
Active Materials ◽  
Neutral Radical ◽  
Deposited Films

scholarly journals Interphases, Interfaces, and Surfaces of Active Materials in Rechargeable Batteries and Perovskite Solar Cells

2020 ◽  
pp. 1905245 ◽  
Author(s):  
Chaofeng Liu ◽  
Jifeng Yuan ◽  
Robert Masse ◽  
Xiaoxiao Jia ◽  
Wenchao Bi ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Rechargeable Batteries ◽  
Active Materials

Framework Structures for Mg Battery Cathodes

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.

scholarly journals Amorphous LiCoO2-based Positive Electrode Active Materials with Good Formability for All-Solid-State Rechargeable Batteries

MRS Advances ◽  
2018 ◽  
Vol 3 (23) ◽  
pp. 1319-1327 ◽  
Author(s):  
Kenji Nagao ◽  
Yuka Nagata ◽  
Atsushi Sakuda ◽  
Akitoshi Hayashi ◽  
Masahiro Tatsumisago
Keyword(s):  
Solid State ◽  
Electrode Materials ◽  
Active Material ◽  
Ionic Conductivities ◽  
Lithium Ion ◽  
Rechargeable Batteries ◽  
Positive Electrode ◽  
Active Materials ◽  
Ceramic Electrolyte ◽  
Xrd Patterns

ABSTRACTAmorphous LiCoO2-based positive electrode materials are synthesized by a mechanical milling technique. As a lithium oxy-acid, Li2SO4, Li3PO4, Li3BO3, Li2CO3, and LiNO3 are selected and milled with LiCoO2. XRD patterns indicate that reaction between LiCoO2 and these lithium oxy-acids proceeds. Amorphization mainly occurs, and several broad peaks attributable to cubic LiCoO2 are observed in all the samples. These amorphous active materials show mixed conductivities of electron and lithium ion. All-solid-state cells using the prepared amorphous active materials and the Li2.9B0.9S0.1O3.1 glass-ceramic electrolyte are fabricated and their charge-discharge properties are examined. The cells with only the 80LiCoO2·20Li2SO4 (mol%) and the 80LiCoO2·20Li3PO4 active materials function as secondary batteries. This is because higher lithium ionic conductivities are obtained in the 80LiCoO2·20Li2SO4 and 80LiCoO2·20Li3PO4 active materials than in the others. The largest capacity is obtained in the cell with the 80LiCoO2·20Li2SO4 active material because of its good formability and high lithium ionic conductivity. In addition, the cell with the 80LiCoO2·20Li2SO4 positive electrode active material shows the better cycle and rate performance than that with the crystalline LiCoO2. It is noted that the amorphization with lithium oxy-acids is a promising technique for achieving a novel active material with better electrochemical performance.

Carbon-Rich Active Materials with Macrocyclic Nanochannels for High-Capacity Negative Electrodes in All-Solid-State Lithium Rechargeable Batteries

Small ◽  
2016 ◽  
Vol 12 (25) ◽  
pp. 3381-3387 ◽  
Author(s):  
Sota Sato ◽  
Atsushi Unemoto ◽  
Takuji Ikeda ◽  
Shin-ichi Orimo ◽  
Hiroyuki Isobe
Keyword(s):  
Solid State ◽  
High Capacity ◽  
Rechargeable Batteries ◽  
Active Materials ◽  
Lithium Rechargeable Batteries ◽  
Negative Electrodes

Steric Effects on the Cyclability of Benzoquinone-type Organic Cathode Active Materials for Rechargeable Batteries

2015 ◽  
Vol 44 (12) ◽  
pp. 1726-1728 ◽  
Author(s):  
Takato Yokoji ◽  
Yuki Kameyama ◽  
Shun Sakaida ◽  
Norihiko Maruyama ◽  
Masaharu Satoh ◽  
...  
Keyword(s):  
Rechargeable Batteries ◽  
Steric Effects ◽  
Active Materials

Application of μ-Nitrido- and μ-Carbido-Bridged Iron Phthalocyanine Dimers as Cathode-Active Materials for Rechargeable Batteries

2021 ◽  
Author(s):  
Takeshi Shimizu ◽  
Katsuhiro Wakamatsu ◽  
Yasuyuki Yamada ◽  
Yuka Toyoda ◽  
Shigehisa Akine ◽  
...  
Keyword(s):  
Rechargeable Batteries ◽  
Iron Phthalocyanine ◽  
Active Materials

High-capacity organic cathode active materials of 2,2′-bis-p-benzoquinone derivatives for rechargeable batteries

2016 ◽  
Vol 4 (15) ◽  
pp. 5457-5466 ◽  
Author(s):  
Takato Yokoji ◽  
Yuki Kameyama ◽  
Norihiko Maruyama ◽  
Hiroshi Matsubara
Keyword(s):  
High Capacity ◽  
Rechargeable Batteries ◽  
Excellent Performance ◽  
Active Materials

Compounds based on the 2,2′-bis-p-benzoquinone framework as cathode active materials improved the performance of rechargeable batteries, revealing that BBQ-based cells exhibited excellent performance, compared to benzoquinone monomers.

Rechargeable organic lithium-ion batteries using electron-deficient benzoquinones as positive-electrode materials with high discharge voltages

2014 ◽  
Vol 2 (45) ◽  
pp. 19347-19354 ◽  
Author(s):  
Takato Yokoji ◽  
Hiroshi Matsubara ◽  
Masaharu Satoh
Keyword(s):  
Lithium Ion Batteries ◽  
Electrode Materials ◽  
Lithium Ion ◽  
Rechargeable Batteries ◽  
Positive Electrode ◽  
Active Materials ◽  
High Discharge ◽  
Positive Electrode Materials

Electron-deficient benzoquinones bearing perfluoroalkyl groups were examined as cathode active materials in rechargeable batteries. The cells afforded higher discharge voltages than those using electron-rich benzoquinones.

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