3,7-Bis(trifluoromethyl)-N-ethylphenothiazine: a redox shuttle with extensive overcharge protection in lithium-ion batteries

2014 ◽  
Vol 2 (43) ◽  
pp. 18190-18193 ◽  
Author(s):  
Aman Preet Kaur ◽  
Selin Ergun ◽  
Corrine F. Elliott ◽  
Susan A. Odom
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Battery Voltage ◽  
Electrolyte Additives ◽  
Redox Shuttle ◽  
Synthetic Graphite ◽  
Overcharge Protection

Constant overcharging of LiFePO4/synthetic graphite lithium-ion batteries in which the electrolyte additives 1,4-di-tert-butyl-2,5-dimethoxybenzene (DBB), N-ethylphenothiazine (EPT), and 3,7-bis(trifluoromethyl)-N-ethylphenothiazine (BCF3EPT) limit battery voltage.

An organophosphine oxide redox shuttle additive that delivers long-term overcharge protection for 4 V lithium-ion batteries

2015 ◽  
Vol 3 (20) ◽  
pp. 10710-10714 ◽  
Author(s):  
Jinhua Huang ◽  
Nasim Azimi ◽  
Lei Cheng ◽  
Ilya A. Shkrob ◽  
Zheng Xue ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Li Ion Batteries ◽  
Redox Shuttle ◽  
Li Ion ◽  
Overcharge Protection

Redox shuttle additives are used to protect Li-ion batteries from overcharge.

1,4-Bis(trimethylsilyl)-2,5-dimethoxybenzene: a novel redox shuttle additive for overcharge protection in lithium-ion batteries that doubles as a mechanistic chemical probe

2015 ◽  
Vol 3 (14) ◽  
pp. 7332-7337 ◽  
Author(s):  
Jinhua Huang ◽  
Ilya A. Shkrob ◽  
Peiqi Wang ◽  
Lei Cheng ◽  
Baofei Pan ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Li Ion Batteries ◽  
Chemical Probe ◽  
Redox Shuttle ◽  
Li Ion ◽  
Overcharge Protection

A novel redox shuttle additive, 1,4-bis(trimethylsilyl)-2,5-dimethoxybenzene, is shown to deliver superb overcharge protection of LiFePO4 electrode in Li-ion batteries.

Molecular engineering towards safer lithium-ion batteries: a highly stable and compatible redox shuttle for overcharge protection

2012 ◽  
Vol 5 (8) ◽  
pp. 8204 ◽  
Author(s):  
Lu Zhang ◽  
Zhengcheng Zhang ◽  
Paul C. Redfern ◽  
Larry A. Curtiss ◽  
Khalil Amine
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Molecular Engineering ◽  
Redox Shuttle ◽  
Overcharge Protection

On the Stability and Reactivity of Redox Shuttles in Their Neutral and Radical Cation Forms

2015 ◽  
Vol 1740 ◽  
Author(s):  
Susan A. Odom ◽  
Matthew Casselman ◽  
Aman Preet Kaur ◽  
Selin Ergun ◽  
Naijao Zhang
Keyword(s):  
Lithium Ion Batteries ◽  
Radical Cation ◽  
Electrode Materials ◽  
Lithium Ion ◽  
Radical Cations ◽  
Top Performers ◽  
Redox Shuttles ◽  
Redox Shuttle ◽  
The Stability ◽  
Overcharge Protection

ABSTRACTThe performance of aromatic compounds as redox shuttles for overcharge protection in lithium-ion batteries is quite variable and is often difficult to predict. Redox shuttles may decompose in battery electrolyte in their neutral and radical cation forms, both of which are present during overcharge protection. While hundreds of compounds have been evaluated as redox shuttle candidates and a few have stood out as top performers, the reasons for increased stability over similar candidates with slightly different structures is often unclear, and the exploration of decomposition of redox shuttles has been severely limited, restricting our ability to design improved versions of redox shuttles that do not suffer from the same reactions in lithium-ion batteries. To better understand the stability and reactivity of redox shuttles (also relevant to the improvement of positive electrode materials in non-aqueous redox flow batteries) our research has focused on measuring the stability of neutral and oxidized forms of redox shuttle candidates as well as using a variety of spectroscopic methods to analyze the byproducts of decomposition, both from radical cations generated in model solvents and electrolytes from postmortem analysis of failed batteries.

Improved synthesis of N-ethyl-3,7-bis(trifluoromethyl)phenothiazine

2020 ◽  
Vol 44 (26) ◽  
pp. 11349-11355 ◽  
Author(s):  
Selin Ergun ◽  
Matthew D. Casselman ◽  
Aman Preet Kaur ◽  
N. Harsha Attanayake ◽  
Sean R. Parkin ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Oxidation Potential ◽  
Redox Shuttle ◽  
Overcharge Protection

N-Ethyl-3,7-bis(trifluoromethyl)phenothiazine is a highly soluble redox shuttle for overcharge protection in lithium-ion batteries with an oxidation potential of ca. 3.8 V vs. Li+/0 in carbonate solvents.

scholarly journals An extremely durable redox shuttle additive for overcharge protection of lithium-ion batteries

2019 ◽  
Vol 13 ◽  
pp. 308-311 ◽  
Author(s):  
Jingjing Zhang ◽  
Ilya A. Shkrob ◽  
Rajeev S. Assary ◽  
Ronald J. Clark ◽  
Richard E. Wilson ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Redox Shuttle ◽  
Overcharge Protection

Understanding the redox shuttle stability of 3,5-di-tert-butyl-1,2-dimethoxybenzene for overcharge protection of lithium-ion batteries

2010 ◽  
Vol 195 (15) ◽  
pp. 4957-4962 ◽  
Author(s):  
Zhengcheng Zhang ◽  
Lu Zhang ◽  
John A. Schlueter ◽  
Paul C. Redfern ◽  
Larry Curtiss ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Tert Butyl ◽  
Redox Shuttle ◽  
Overcharge Protection

Redox shuttle additives for chemical overcharge protection in lithium ion batteries

2002 ◽  
Vol 19 (4) ◽  
pp. 645-652 ◽  
Author(s):  
Doo-Yeon Lee ◽  
Hyo-Sug Lee ◽  
Ho-Sung Kim ◽  
Hee-Young Sun ◽  
Do-Young Seung
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Redox Shuttle ◽  
Overcharge Protection
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