1,4-di-tert-butyl-2,5-bis(2,2,2-trifluoroethoxy)benzene

• CAS: 1147737-68-5
• Catalog Number: ACM1147737685
• Category: Main Products
• Molecular Weight: 386.37
• Molecular Formula: C18H24F6O2
• Synonyms: 1,4-di-tert-butyl-2,5-bis(2,2,2-trifluoro
• Appearance: Pale yellow solid

Case Study

1,4-Di-Tert-Butyl-2,5-Bis(2,2,2-Trifluoroethoxy)Benzene for Lithium-Ion Battery Protection

Moshurchak, L. M., et al. Journal of the Electrochemical Society, 2009, 156(4), A309.

1,4-di-tert-butyl-2,5-bis(2,2,2-trifluoroethoxy)benzene is a stable redox shuttle additive. The shuttle molecule has an oxidation potential of 4.25 V versus Li/Li and has been shown to provide overcharge protection for ion batteries.
Performance tests and results
· 1,4-di-tert-butyl-2,5-bis(2,2,2-trifluoroethoxy)benzene was tested in LiFePO4/Li, LiCoO2/Li, and Li Ni1/3Mn1/3Co1/3O2/Li half-cells as well as in LiFePO4/graphite and LiFePO4/Li4Ti5O12 lithium-ion coin cells.
· The molecule 1,4-di-t-butyl-2,5-bis 2,2,2-trifluoroethoxy- benzene has a redox potential suitable for use in LiCoO2 and Li Ni1/3Mn1/3Co1/3O2-containing lithium-ion cells.
· With an oxidation potential of 4.25 V vs Li/Li+, this molecule has demonstrated effective overcharge protection over multiple cycles with 100% overcharge.
· It is anticipated that the molecule 1,4-di-t-butyl-2,5-bis 2,2,2-trifluoroethoxybenzene would exhibit similar rate capabilities to the 1,4-di-t-butyl-2,5-dimethoxybenzene molecule. This expectation is based on the structural similarity between the molecules and the comparable currents observed in the cyclic voltammograms.

1,4-Di-Tert-Butyl-2,5-Bis(2,2,2-Trifluoroethoxy)Benzene for Improving the Cycle Stability of Cathode Materials

Zhu, Xinhua, et al. Electrochemical Society Meeting Abstracts ecee2019. No. 1.

1,4-di-tert-butyl-2,5-bis(2,2,2-trifluoroethoxy)benzene, as a redox shuttle electrolyte additive (RSA), can effectively improve the cycle stability of nickel-rich layered cathode materials. An analysis was carried out on a group of power-optimized commercial LiNi0.80Co0.15Al0.05O2 (NCA) electrodes under various aging conditions to understand the degradation process.
Mechanism of action and performance
· The degradation of NCA electrodes is largely due to intrinsic surface heterogeneity leading to localized overcharge reactions.The RSA has the ability to effectively balance the uneven distribution of charge by transferring excess charges between overcharged particles and normally charged particles, thereby preventing localized overcharging reactions.
· Results from experiments showed that adding a small amount (0.025 M) of RSA 1,4-di-tert-butyl-2,5-bis(2,2,2-trifluoroethoxy)benzene improved the cycling performance of commercial Nickel-rich cathode materials by approximately 30% in practical usage conditions. This approach has potential for application in various commercial lithium-ion battery systems with liquid electrolytes.