scholarly journals Phenothiazine-functionalized redox polymers for a new cathode-active material

RSC Advances ◽  
2015 ◽  
Vol 5 (29) ◽  
pp. 22947-22950 ◽  
Author(s):  
Ali A. Golriz ◽  
Takeo Suga ◽  
Hiroyuki Nishide ◽  
Rüdiger Berger ◽  
Jochen S. Gutmann
Keyword(s):  
Active Material ◽  
Functionalized Polymers ◽  
Rechargeable Battery ◽  
Redox Polymers ◽  
Redox Active

Redox-active, phenothiazine-functionalized polymers were synthesized and employed as a promising cathode-active material (∼3.7 V vs. Li, 77 Ah kg−1) in a rechargeable battery.

Theoretical Exploration of 2,2’-Bipyridines as Electro-Active Compounds in Flow Batteries

2019 ◽  
Author(s):  
Mariano Sánchez-Castellanos ◽  
Martha M. Flores-Leonar ◽  
Zaahel Mata-Pinzón ◽  
Humberto G. Laguna ◽  
Karl García-Ruiz ◽  
...  
Keyword(s):  
Redox Potential ◽  
Active Material ◽  
Chemical Properties ◽  
Small Subset ◽  
Solubility In Water ◽  
Protonation Reaction ◽  
Redox Active ◽  
Physico Chemical ◽  
Pka Value ◽  
Flow Batteries

Compounds from the 2,2’-bipyridine molecular family were investigated for use as redox-active materials in organic flow batteries. For 156 2,2’-bipyridine derivatives reported in the academic literature, we calculated the redox potential, the pKa for the first protonation reaction, and the solubility in aqueous solutions. Using experimental data on a small subset of derivatives, we were able to calibrate our calculations. We find that functionalization with electron-withdrawing groups leads to an increase of the redox potential and to an increase of the molecular acidity (as expressed in a reduction of the pKa value for the first protonation step). Furthermore, calculations of solubility in water indicate that some of the studied derivatives have adequate solubility for flow battery applications. Based on an analysis of the physico-chemical properties of the 156 studied compounds, we down-select five molecules with carbonyl- and nitro-based functional groups, whose parameters are especially promising for potential application as negative redox-active material inorganic flow batteries.

Theoretical Exploration of 2,2’-Bipyridines as Electro-Active Compounds in Flow Batteries

2019 ◽  
Author(s):  
Mariano Sánchez-Castellanos ◽  
Martha M. Flores-Leonar ◽  
Zaahel Mata-Pinzón ◽  
Humberto G. Laguna ◽  
Karl García-Ruiz ◽  
...  
Keyword(s):  
Redox Potential ◽  
Active Material ◽  
Chemical Properties ◽  
Small Subset ◽  
Solubility In Water ◽  
Protonation Reaction ◽  
Redox Active ◽  
Physico Chemical ◽  
Pka Value ◽  
Flow Batteries

Compounds from the 2,2’-bipyridine molecular family were investigated for use as redox-active materials in organic flow batteries. For 156 2,2’-bipyridine derivatives reported in the academic literature, we calculated the redox potential, the pKa for the first protonation reaction, and the solubility in aqueous solutions. Using experimental data on a small subset of derivatives, we were able to calibrate our calculations. We find that functionalization with electron-withdrawing groups leads to an increase of the redox potential and to an increase of the molecular acidity (as expressed in a reduction of the pKa value for the first protonation step). Furthermore, calculations of solubility in water indicate that some of the studied derivatives have adequate solubility for flow battery applications. Based on an analysis of the physico-chemical properties of the 156 studied compounds, we down-select five molecules with carbonyl- and nitro-based functional groups, whose parameters are especially promising for potential application as negative redox-active material inorganic flow batteries.

TEMPO/Phenazine Combi-Molecule: A Redox-Active Material for Symmetric Aqueous Redox-Flow Batteries

2016 ◽  
Vol 1 (5) ◽  
pp. 976-980 ◽  
Author(s):  
Jan Winsberg ◽  
Christian Stolze ◽  
Simon Muench ◽  
Ferenc Liedl ◽  
Martin D. Hager ◽  
...  
Keyword(s):  
Active Material ◽  
Redox Flow Batteries ◽  
Redox Active ◽  
Flow Batteries

Self-Assembled NiO/Ni(OH)2 Nanoflakes as Active Material for High-Power and High-Energy Hybrid Rechargeable Battery

Nano Letters ◽  
2016 ◽  
Vol 16 (3) ◽  
pp. 1794-1802 ◽  
Author(s):  
Dong Un Lee ◽  
Jing Fu ◽  
Moon Gyu Park ◽  
Hao Liu ◽  
Ali Ghorbani Kashkooli ◽  
...  
Keyword(s):  
High Power ◽  
Active Material ◽  
High Energy ◽  
Rechargeable Battery ◽  
Self Assembled

An all-organic rechargeable battery using bipolar polyparaphenylene as a redox-active cathode and anode

2013 ◽  
Vol 49 (6) ◽  
pp. 567-569 ◽  
Author(s):  
L. M. Zhu ◽  
A. W. Lei ◽  
Y. L. Cao ◽  
X. P. Ai ◽  
H. X. Yang
Keyword(s):  
Rechargeable Battery ◽  
Redox Active

scholarly journals 2D Coordination Network of Trioxotriangulene with Multiple Redox Abilities and Its Rechargeable Battery Performance

2020 ◽  
Vol 21 (13) ◽  
pp. 4723
Author(s):  
Tsuyoshi Murata ◽  
Taro Koide ◽  
Hirofumi Nobukuni ◽  
Ryotaro Tsuji ◽  
Yasushi Morita
Keyword(s):  
Active Material ◽  
Lithium Ion ◽  
Cycling Performance ◽  
Zinc Ion ◽  
Cycle Performance ◽  
Rechargeable Battery ◽  
Neutral Radical ◽  
Coordination Network ◽  
Multi Stage ◽  
Redox Ability

A three-fold symmetric trioxotriangulene derivative with three pyridyl groups as coordinating sites was designed and synthesized. In a cyclic voltammetry measurement, the trioxotriangulene skeleton exhibited a multi-stage redox ability from neutral radical to radical tetra-anion species. In the zinc complex of monoanion species, three pyridyl groups coordinated to the zinc ion to build up a two-dimensional coordination network with a cavity larger than 12 Å in diameter. This complex was utilized as a cathode active material of a lithium ion battery, and it exhibited a capacity of ca. 60 mAh g−1 per the weight of the active material with a stable cycling performance up to 1000 cycles. This work shows that the coordination network formed by the trioxotriangulene-based ligand was effective in the improvement of cycle performance of the organic rechargeable battery.

Covalently functionalized heterostructured carbon by redox-active p-phenylenediamine molecules for high-performance symmetric supercapacitors

2019 ◽  
Vol 43 (4) ◽  
pp. 1688-1698 ◽  
Author(s):  
Yuanyuan He ◽  
Xia Yang ◽  
Ning An ◽  
Xiaotong Wang ◽  
Yuying Yang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
High Performance ◽  
Active Material ◽  
Single Step ◽  
Redox Active ◽  
Electrochemically Active

p-Phenylenediamine (PPD) as a novel organic electrochemically active material for supercapacitors has been covalently grafted onto dissected carbon nanotubes (DCNTs) via a facile single-step reflux method.

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