ORCID Profile
0000-0002-1278-8734
Current Organisation
Deakin University
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Publisher: The Electrochemical Society
Date: 15-03-2013
Abstract: Electrochemical behaviors of the bis(trifluoromethylsulfonyl)imide ([TFSI] − )-based ionic liquids consisting of 1-butyl-3-methylpyrrolidinium ([Py 1,4 ] + ), methyltributylammonium ([N 1,4,4,4 ] + ), and methyltrioctylammonium ([N 1,8,8,8 ] + ) cations were investigated by using low-index Au single crystal electrodes by cyclic voltammetry. The voltammetric feature was dependent on both the structure of the cation and the crystallographic orientation of Au. The electrochemical potential window of the [TFSI] − -based ILs was found to be only dependent upon the chemical structure of the cation. For each Au crystal plane, the electrochemical potential window of each IL was roughly estimated to be approximately 5.5 V, 5.6 V, and 5.8 V for [Py 1,4 ][TFSI], [N 1,4,4,4 ][TFSI] and [N 1,8,8,8 ][TFSI], respectively.
Publisher: Elsevier BV
Date: 03-2021
Publisher: Wiley
Date: 09-05-2023
DOI: 10.1002/EEM2.12622
Abstract: A suitable interface between the electrode and electrolyte is crucial in achieving highly stable electrochemical performance for Li‐ion batteries, as facile ionic transport is required. Intriguing research and development have recently been conducted to form a stable interface between the electrode and electrolyte. Therefore, it is essential to investigate emerging knowledge and contextualize it. The nanoengineering of the electrode‐electrolyte interface has been actively researched at the electrode/electrolyte and interphase levels. This review presents and summarizes some recent advances aimed at nanoengineering approaches to build a more stable electrode‐electrolyte interface and assess the impact of each approach adopted. Furthermore, future perspectives on the feasibility and practicality of each approach will also be reviewed in detail. Finally, this review aids in projecting a more sustainable research pathway for a nanoengineered interphase design between electrode and electrolyte, which is pivotal for high‐performance, thermally stable Li‐ion batteries.
Publisher: Elsevier BV
Date: 12-2021
Publisher: Wiley
Date: 25-04-2022
Abstract: All‐solid‐state batteries (ASSBs) using organic ionic plastic crystals (OIPCs) are promising candidates to overcome the inherent safety issues of lithium‐ion batteries (LIBs). Although OIPCs have excellent process applicability in the roll‐to‐roll electrode fabrication process, their application as solid electrolytes incorporated in composite electrodes has yet to be demonstrated in detail. Herein, we denote the positive effect of the N ‐ethyl‐ N ‐methylpyrrolidinium bis(fluorosulfonyl)imide ([C 2 mpyr][FSI]) incorporated within a composite graphite anode on the charge rate capability and cycle life. The highest charge capacity ratio (the charge capacity at 2C vs. that measured at 0.1C) was measured for the composite anode with an OIPC composite ratio of 50 wt % (89.5 %, 295.7 mAh/g at 2C charge), almost the same as that of the graphite anode with a liquid electrolyte (85.7 %, 295.9 mAh/g at 2C charge). More favorable lithium‐ion conduction pathways were resolved for the anode with a higher OIPC composite ratio, whereas an excessive amount of OIPC reduced the long‐term cyclability. The most stable discharge capacity retention was obtained for 30 wt % OIPC composite (257.4 mAh/g at the 100th discharge), which showed no signs of discharge capacity fading within 100 cycles. The lithiation/delithiation process of the solid‐state graphite‐[C 2 mpyr][FSI] composite anode was evaluated to be stable and reversible. In addition, the incorporated OIPC composite enhanced the electrolyte/electrode and electrode/current collector contacts. This work highlights multiple advantageous functions of the OIPC in a composite graphite anode, which will broaden our horizons for the use of OIPC composites in ASSBs.
Publisher: Elsevier BV
Date: 06-2014
Publisher: Elsevier BV
Date: 07-2012
Publisher: The Chemical Society of Japan
Date: 05-04-2022
DOI: 10.1246/CL.220016
Publisher: Elsevier BV
Date: 2020
Publisher: Elsevier BV
Date: 08-2016
Publisher: Wiley
Date: 09-2021
Publisher: Wiley
Date: 14-06-2021
Abstract: Precise control over redox properties is essential for high‐performance organic electronic devices such as organic batteries, electrochromic devices, and information storage devices. In this context, multi‐redox active carbons and hydrocarbons, represented as C x H y molecules ( x ≥1, y ≥0), are highly sought after, because they can switch between multiple redox states. Herein, we outline the redox properties of C x H y molecules as solutes and adsorbed species. Furthermore, the limitations of evaluating their redox properties and the possible solutions are summarized. Additionally, the theoretical capacity (mAh/g) and gravimetric energy density (Wh/kg) of secondary batteries were estimated based on the redox properties of 185 C x H y molecules, which have primarily been reported in the last decade. Among them, seven C x H y molecules were found to have the potential to surpass the energy density of LiNi 0.6 Mn 0.2 Co 0.2 O 2 /graphite batteries. The use of C x H y molecules in multielectrochromic devices and multi‐bit memory is also explained. We believe that this review will encourage further utilization of C x H y molecules thereby promoting its applications in organic electronic devices.
Publisher: Wiley
Date: 23-06-2022
Abstract: Invited for this month's cover picture is the group of Dr. Hiroyuki Ueda and Prof. Patrick C. Howlett at Deakin University (Australia) jointly working with Toyota Motor Corporation (Japan). The cover picture shows the fast lithium‐ion conduction pathways in the graphite anode of all‐solid‐state batteries (ASSBs) enabled by the incorporation of an organic ionic plastic crystal (OIPC) electrolyte. Read the full text of the Research Article at 10.1002/batt.202200057 .
Publisher: American Chemical Society (ACS)
Date: 22-02-2022
Publisher: Elsevier
Date: 2024
Publisher: Wiley
Date: 15-06-2022
Publisher: Elsevier
Date: 2023
Publisher: The Electrochemical Society
Date: 02-04-2013
Abstract: Stable Au electrodes for surface enhanced infrared spectroscopy (SEIRAS) were prepared using H-terminated Si as substrates. The prepared electrodes were stable even in strong alkaline solutions and enabled us to measure SEIRA spectra repeatedly. By injection the solution containing 4-PySH from the outside of the SEIRAS cell, adsorbed processes were observed easily and precisely. After injecting the solution, vibration bands corresponding to 4-PySH were observed at ca. 5-10 min, 1-3 min, and 0-1 min in DCl, NaClO 4 , and KOD, respectively. Analyzing the SEIRA spectra, the desorption potential of 4-PyS SAM in an acidic solution was evaluated to be – 1.2 V vs. Ag/AgCl.
Publisher: Elsevier BV
Date: 11-2021
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5CP06542A
Abstract: The electrochemical behavior of cobaltocenium (Cc + ) on a Au(111) electrode was investigated in five 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide ([C n mim][Tf 2 N], n = 2, 4, 6, 8, or 10) ionic liquids (ILs) in the temperature range from 293.15 to 343.15 K.
Start Date: 2015
End Date: 2016
Funder: Kumamoto University
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