Exploring the role of redox mediator within mesoporous carbon using Thionine and LiTFSIwater-in-salt electrolytes

Zhu, Yachao; Yang, Guoshen; Wan, Xuhao; Deng, Jie; Burton, Tobias F.; Deebansok, Siraprapha; Zigah, Dodzi; Zhou, Hang; Guo, Yuzheng; Fontaine, Olivier

doi:10.1016/j.ensm.2022.12.026

Cited by 9 publications

(5 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1c and d. 1 H NMR of these molecules further conrmed their successful formation, as shown in Fig. S3.…”

Section: Resultsmentioning

confidence: 78%

“…Amidst the pressing need to address escalating global energy demands and rapid industrialization, a great deal of attention has been focused on developing high-power and high-energydensity energy storage and conversion devices. [1][2][3][4][5][6][7] Electrochemical capacitors (ECs), or supercapacitors, have emerged as particularly promising candidates due to their superior power density, long lifetime, and high cyclic stability in comparison to secondary batteries. [8][9][10][11] These ECs can bridge the power-energy trade-off between batteries (high energy) and traditional dielectric capacitors (high power).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Electrochemical energy storage in an organic supercapacitor via a non-electrochemical proton charge assembly

Mukhopadhyay,

Kottaichamy,

Devendrachari

et al. 2024

Chem. Sci.

View full text Add to dashboard Cite

show abstract

“…1c and d. 1 H NMR of these molecules further conrmed their successful formation, as shown in Fig. S3.…”

Section: Resultsmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Electrochemical energy storage in an organic supercapacitor via a non-electrochemical proton charge assembly

Mukhopadhyay,

Kottaichamy,

Devendrachari

et al. 2024

Chem. Sci.

View full text Add to dashboard Cite

show abstract

“…(A control experiment of TH in plain Nafion film and irradiated with visible light revealed no changes in the TH absorbance at 600 nm region (Figure S4B) thus ruling out direct photobleaching of TH.) As shown earlier, the stability of leucothionine in inert atmosphere offers the possibility of energy storage as well as in applications such as supercapacitors …”

Section: Resultsmentioning

confidence: 82%

“…As shown earlier, the stability of leucothionine in inert atmosphere offers the possibility of energy storage 61 as well as in applications such as supercapacitors. 62 3.4. Kinetics of Electron Transfer.…”

Section: Langmuirmentioning

confidence: 99%

AgInS₂-Embedded Photocatalytic Membrane: Insights into the Excited State and Electron Transfer Dynamics

Kipkorir,

Ealey,

et al. 2023

Langmuir

View full text Add to dashboard Cite

Photocatalytic reactions at semiconductor nanocrystal surfaces are useful for synthesizing value-added chemicals using sunlight. Semiconductor nanocrystals dispersed in a rigid framework, such as polymer film, can mitigate issues such as aggregation, product separation, and other challenges that are usually encountered in suspensions or slurries. Using a cation exchange technique, we successfully embedded AgInS 2 nanoparticles into a Nafion matrix, termed AgInS 2 −Nafion. This was achieved through a galvanic exchange between In and Ag in In 2 S 3 present within the Nafion film, enabling an adjustable Ag:In ratio for optimized photophysical properties. As in the case of colloidal suspension, the AgInS 2 particles embedded in Nafion exhibit a long absorption tail, a broad emission band with a large Stokes shift, and emission lifetimes extending into the microseconds that are characteristic of donor−acceptor pairs, DAP. Remediation of surface states with the treatment of 3-mercaptopropionic acid resulted in significant enhancement in the emission yield. Charge carrier generation through bandgap excitation as well as activation of DAP states which reside within the bandgap is probed through transient absorption spectroscopy. The photocatalytic activity of AgInS 2 −Nafion was probed by using thionine as an electron acceptor. The electron transfer rate constant from excited AgInS 2 to thionine as observed from transient absorption spectroscopy was determined to be ∼6.3 × 10 10 s −1 . The design of a photoactive membrane offers new ways to carry out photocatalytic processes with greater selectivity.

show abstract

“…The current widespread use of highly concentrated electrolytes (WiSEs), is due to the fact that they provide a broad DOI: 10.1002/smll.202303945 electrochemical stability window (ESW) through specific SEI formation. When compared to conventional aqueous electrolytes, their significantly wide ESW [1][2][3] tends to enhance the energy of an electrochemical cell, making WiSEs a more attractive and less toxic solution as opposed to organic electrolytes. However, when negative electrodes are operated at a potential below 1.9 V versus Li/Li + [4] the SEI becomes unstable, leading to poor cycling stability and reduced viability in terms of practical applications.…”

Section: Introductionmentioning

confidence: 99%

Unveiling LiTFSI Precipitation as a Key Factor in Solid Electrolyte Interphase Formation in Li‐Based Water‐in‐Salt Electrolytes

Jommongkol,

Deebansok,

Deng

et al. 2023

Small

Self Cite

View full text Add to dashboard Cite

A water‐in‐salt electrolyte is a highly concentrated aqueous solution (i.e., 21 mol LiTFSI in 1 kg H2O) that reduces the number of water molecules surrounding salt ions, thereby decreasing the water activity responsible for decomposition. This electrolyte widens the electrochemical stability window via the formation of a solid electrolyte interphase (SEI) at the electrode surface. However, using high concentration electrolytes in Li‐ion battery technology to enhance energy density and increase cycling stability remains challenging. A parasitic reaction, called the hydrogen evolution reaction, occurs when the reaction operates at a lower voltage. It is demonstrated here that a micrometric white layer is indeed a component of the SEI layer, not just on the nanoscale, through the utilization of an operando high‐resolution optical microscope. The results indicate that LiTFSI precipitation is the primary species present in the SEI layer. Furthermore, the passivation layer is found to be dynamic since it dissolves back into the electrolyte during open circuit voltage.

show abstract

Exploring the role of redox mediator within mesoporous carbon using Thionine and LiTFSIwater-in-salt electrolytes

Cited by 9 publications

References 28 publications

Electrochemical energy storage in an organic supercapacitor via a non-electrochemical proton charge assembly

Electrochemical energy storage in an organic supercapacitor via a non-electrochemical proton charge assembly

AgInS₂-Embedded Photocatalytic Membrane: Insights into the Excited State and Electron Transfer Dynamics

Unveiling LiTFSI Precipitation as a Key Factor in Solid Electrolyte Interphase Formation in Li‐Based Water‐in‐Salt Electrolytes

Contact Info

Product

Resources

About

Exploring the role of redox mediator within mesoporous carbon using Thionine and LiTFSIwater-in-salt electrolytes

Cited by 9 publications

References 28 publications

Electrochemical energy storage in an organic supercapacitor via a non-electrochemical proton charge assembly

Electrochemical energy storage in an organic supercapacitor via a non-electrochemical proton charge assembly

AgInS2-Embedded Photocatalytic Membrane: Insights into the Excited State and Electron Transfer Dynamics

Unveiling LiTFSI Precipitation as a Key Factor in Solid Electrolyte Interphase Formation in Li‐Based Water‐in‐Salt Electrolytes

Contact Info

Product

Resources

About

AgInS₂-Embedded Photocatalytic Membrane: Insights into the Excited State and Electron Transfer Dynamics