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  • The Electrochemical Society  (15)
  • 1
    Online Resource
    Online Resource
    High-k Nanomixed Hf[sub x]Al[sub y]O[sub z] Film Capacitors Grown on Ru Metal Electrodes by Atomic Layer Deposition
    The Electrochemical Society ; 2005
    In:  Electrochemical and Solid-State Letters Vol. 8, No. 10 ( 2005), p. F40-
    Details
    In: Electrochemical and Solid-State Letters, The Electrochemical Society, Vol. 8, No. 10 ( 2005), p. F40-
    Type of Medium: Online Resource
    ISSN: 1099-0062
    URL: Article
    DOI: 10.1149/1.2017925
    Language: English
    Publisher: The Electrochemical Society
    Publication Date: 2005
    detail.hit.zdb_id: 1483551-4
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  • 2
    Online Resource
    Online Resource
    Electrical Properties in High-k HfO[sub 2] Capacitors with an Equivalent Oxide Thickness of 9 Å on Ru Metal Electrode
    The Electrochemical Society ; 2005
    In:  Electrochemical and Solid-State Letters Vol. 8, No. 6 ( 2005), p. F17-
    Details
    In: Electrochemical and Solid-State Letters, The Electrochemical Society, Vol. 8, No. 6 ( 2005), p. F17-
    Type of Medium: Online Resource
    ISSN: 1099-0062
    URL: Article
    DOI: 10.1149/1.1895285
    Language: English
    Publisher: The Electrochemical Society
    Publication Date: 2005
    detail.hit.zdb_id: 1483551-4
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  • 3
    Online Resource
    Online Resource
    Evaluation of Integrated Fuel Processor for Residential PEMFCs Cogeneration System
    The Electrochemical Society ; 2007
    In:  ECS Transactions Vol. 5, No. 1 ( 2007-05-04), p. 687-697
    Details
    In: ECS Transactions, The Electrochemical Society, Vol. 5, No. 1 ( 2007-05-04), p. 687-697
    Abstract: Natural gas fuel processor has been developed for 1 kW class residential PEMFCs system. Unit processes and auxiliary units are integrated into packaged hardware, which shows thermal efficiency of 78% as a HHV basis with methane conversion of 92% at rated load. After confirming the performance at rated load, partial load operations are carried out by investigating the composition of product gas and thermal efficiencies at discrete load levels. The start up time is about an hour for CO concentration in product gas below 10 ppm. Dynamic response of fuel processor with load fluctuation is investigated to establish the load change strategy. In the following paper, operation results of fuel processor as well as fuel processor failure analysis are presented to evaluate the developed fuel processor.
    Type of Medium: Online Resource
    ISSN: 1938-5862 , 1938-6737
    URL: Article
    DOI: 10.1149/1.2729050
    Language: Unknown
    Publisher: The Electrochemical Society
    Publication Date: 2007
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  • 4
    Online Resource
    Online Resource
    Robust Cycling of Ultrathin Li-Metal Enabled By Nitrate-Preplanted Li Powder Electrode
    The Electrochemical Society ; 2022
    In:  ECS Meeting Abstracts Vol. MA2022-01, No. 55 ( 2022-07-07), p. 2253-2253
    Details
    In: ECS Meeting Abstracts, The Electrochemical Society, Vol. MA2022-01, No. 55 ( 2022-07-07), p. 2253-2253
    Abstract: The Li metal anode has been spotlighted for large-scale battery systems such as electric vehicles (EVs) and energy storage systems (ESSs) because of its high theoretical energy density and lowest potential. However, the Li metal anode still has the several challenging issues like Li dendrite growth and many side reactions. Our strategy to this problem is to utilize Li metal powder (LMP), which has superior advantages in reducing local current and utilizing slurry-based coating process for wide-width electrodes. Nevertheless, the spherical shape of LMP with the imperfect protection layer can be lost during the long-term cycling, which leads to dead particles formation and ununiform Li distribution. In this work, we present a LMP electrode having pre-planted nitrates (LN-LMP). The LiNO 3 additive in the LMP electrode can chemically replace the native layer with the uniform Li 3 N-rich passivation layer on the surface during the simple slurry mixing process. Furthermore, residual LiNO 3 was continuously released toward electrolyte, thereby repairing the SEI during cycling. As a result, the 20 µm‐thick LN‐LMP electrodes exhibited the robust cycling performances compared to control cells with conventional LMPs and LiNO 3 ‐containing electrolytes.
    Type of Medium: Online Resource
    ISSN: 2151-2043
    URL: Article
    DOI: 10.1149/MA2022-01552253mtgabs
    Language: Unknown
    Publisher: The Electrochemical Society
    Publication Date: 2022
    detail.hit.zdb_id: 2438749-6
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  • 5
    Online Resource
    Online Resource
    Development of Flame Retarding Separator for Lithium Ion Battery By Crosslinkable Binder Coating
    The Electrochemical Society ; 2020
    In:  ECS Meeting Abstracts Vol. MA2020-02, No. 68 ( 2020-11-23), p. 3479-3479
    Details
    In: ECS Meeting Abstracts, The Electrochemical Society, Vol. MA2020-02, No. 68 ( 2020-11-23), p. 3479-3479
    Abstract: Conventional polyolefin separators undergo thermal shrinkage under abnormal conditions such as overcharging and overheating, and this may induce catastrophic thermal runaway in LIBs, resulting in gas venting, fire, rupture, or explosion. Ceramic-coated separators (CCSs) have been widely used because inorganic materials with high heat resistance protect the polyolefin surface to prevent thermal shrinkage of the separator. However, without the use of highly adhesive and thermally stable polymeric binders, the ceramic coating layer is incapable of functioning properly to maintain the thermal stability of the CCSs when exposed to heat. As one method for securing the thermal stability of the separator, we propose crosslinking of the binder in the ceramic coating layer. This study presents a thermally stable crosslinkable silsesquioxane-based ceramic-coated separator (x-CCS) with flame-retarding capabilities for the fabrication of safe Li-ion batteries. The binder used for crosslinking is ePOSS (inorganic polyhedral oligomeric silsesquioxane with epoxy functional end groups) with high thermal stability, which can form crosslinks with each other through UV irradiation. The x-CCS was fabricated by applying a 3 μm thick composite layer of Al 2 O 3 /ePOSS/PVdF-HFP to both sides of a conventional polyethylene separator. This remarkably improved the thermal stability of the separator at 140°C, with the original form of the separator maintained even after an ignition test. Because ePOSS, which has high thermal stability, is crosslinked like a net in the coating layer and maintains its shape after combustion. Although the permeability of the CCS was slightly decreased by the applied coating, the resultant improved wettability towards liquid electrolyte thereby enhancing the ionic conductivity, cycle performance, and rate capability when used in a Li-ion battery.
    Type of Medium: Online Resource
    ISSN: 2151-2043
    URL: Article
    DOI: 10.1149/MA2020-02683479mtgabs
    Language: Unknown
    Publisher: The Electrochemical Society
    Publication Date: 2020
    detail.hit.zdb_id: 2438749-6
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  • 6
    Online Resource
    Online Resource
    Ultra-Thin Nitrate-Preplanted Li Powder Composite for Lithium Metal Secondary Battery
    The Electrochemical Society ; 2021
    In:  ECS Meeting Abstracts Vol. MA2021-02, No. 58 ( 2021-10-19), p. 1688-1688
    Details
    In: ECS Meeting Abstracts, The Electrochemical Society, Vol. MA2021-02, No. 58 ( 2021-10-19), p. 1688-1688
    Type of Medium: Online Resource
    ISSN: 2151-2043
    URL: Article
    DOI: 10.1149/MA2021-02581688mtgabs
    Language: Unknown
    Publisher: The Electrochemical Society
    Publication Date: 2021
    detail.hit.zdb_id: 2438749-6
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  • 7
    Online Resource
    Online Resource
    Polymeric Binder Distribution within LiCoO 2 Electrodes By Using a Surface and Interfacial Cutting Analysis System (SAICAS)
    The Electrochemical Society ; 2018
    In:  ECS Meeting Abstracts Vol. MA2018-01, No. 1 ( 2018-04-13), p. 92-92
    Details
    In: ECS Meeting Abstracts, The Electrochemical Society, Vol. MA2018-01, No. 1 ( 2018-04-13), p. 92-92
    Abstract: Polymeric binder distribution of lithium-ion battery (LIB) electrodes becomes as important as using high-capacity electrode materials for highly loaded electrodes. Because, the electrode coating layer can be delaminated from the current collector within the service time unless the binder is well-dispersed. However, due to the limitation of usable analysis tools, to get some information on binder distribution remains one of the unresolved issues in LIBs. Fortunately, we have started to analyse these issues using a new tool, surface and interfacial cutting analysis system (SAICAS, Daipla Witnes, Japan), to measure adhesion properties of LIB composite electrodes as a function of depths. The adhesion strength measured by SAICAS is approximately proportional to the binder content, the polymeric binder distribution within the electrodes can be unveiled with a SAICAS. In this study, we fabricated two LiCoO 2 positive electrodes dried at different temperatures, 130 and 230 o C. They were used to analyse the polymeric binder distribution in the electrode by using SAICAS. First, their adhesion strengths were carefully measured at every 10 μm depth from the electrode surface. At the same time, both surface/cross-sectional SEM images and corresponding EDS atomic mapping were confirmed to find correlation with adhesion strength. Finally, their electrochemical property changes such as cycle life, rate capability, DC-IR, etc. at room and high temperatures were also discussed.
    Type of Medium: Online Resource
    ISSN: 2151-2043
    URL: Article
    DOI: 10.1149/MA2018-01/1/92
    Language: Unknown
    Publisher: The Electrochemical Society
    Publication Date: 2018
    detail.hit.zdb_id: 2438749-6
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  • 8
    Online Resource
    Online Resource
    Unveiling Polymeric Binder Distribution within Electrodes for High-Energy-Density Li-Ion Batteries By Measuring Adhesion Properties As a Function of Depth
    The Electrochemical Society ; 2018
    In:  ECS Meeting Abstracts Vol. MA2018-02, No. 4 ( 2018-07-23), p. 239-239
    Details
    In: ECS Meeting Abstracts, The Electrochemical Society, Vol. MA2018-02, No. 4 ( 2018-07-23), p. 239-239
    Abstract: To improve the energy density of state-of-the-art lithium-ion batteries (LIBs), there are still extensive efforts to find new materials to deliver higher capacity. However, it takes a long time to put some candidates into a practical usage. Along with it, to optimize the electrode or cell design is in parallel and continuously upgraded by increasing loading level of electrodes or decreasing inactive material content within the cell. For this purpose, it is very important to analyze the polymeric binder distribution within the electrode carefully. However, due to limited analysis tools, it is too time-consuming process to get informative data. Fortunately, a new tool, surface and interfacial cutting analysis system (SAICAS), was developed and being used to reveal the adhesion properties of composite electrodes for LIBs [1-5]. Herein, we report the possibility to unveil the polymeric binder distribution with the electrode by correlating the adhesion strength to relative polymeric binder content. Totally different binder distribution within the electrode was built by controlling the drying temperature and confirmed by an EDX mapping technique. In addition, their electrochemical performance is also compared by changing operation conditions [6] . References [1] B. Son, M.-H. Ryou, Y. M. Lee et al., ACS Applied Materials & Interfaces, 6 (2014) 526-531 [2] J. Choi, M.-H. Ryou, Y. M. Lee et al., Journal of Power Sources, 252 (2014) 138-143 [3] J. Choi, M.-H. Ryou, Y. M. Lee et al., ACS Applied Materials & Interfaces, 7 (2015) 14851-14858 [4] D. Song, M.-H. Ryou, Y. M. Lee et al., Advanced Materials Interfaces, 3 (2016) 1600270 [5] K. Kim, M.-H. Ryou, Y. M. Lee et al., ACS Applied Materials and Interfaces, 8 (2016) 23688-23695 [6] K. Kim, S. Byun, J. Choi, M.-H. Ryou, Y. M. Lee et al., ChemPhysChem, Accepted in 2018 Figure 1
    Type of Medium: Online Resource
    ISSN: 2151-2043
    URL: Article
    DOI: 10.1149/MA2018-02/4/239
    Language: Unknown
    Publisher: The Electrochemical Society
    Publication Date: 2018
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  • 9
    Online Resource
    Online Resource
    Study of Improving the Thermal Stability of Ceramic Coated Separator Via Chemical Crosslinking between Ceramic Particles and Polymeric Binders
    The Electrochemical Society ; 2022
    In:  ECS Meeting Abstracts Vol. MA2022-01, No. 55 ( 2022-07-07), p. 2259-2259
    Details
    In: ECS Meeting Abstracts, The Electrochemical Society, Vol. MA2022-01, No. 55 ( 2022-07-07), p. 2259-2259
    Abstract: Lithium-ion batteries (LIBs) are used in everyday applications such as portable electronics and electric vehicles (EVs) in our daily life. In large-scale batteries such as EVs, high energy density has been developed to secure longer mileage with one charge. Securing battery safety becomes extremely challenging as densifying the cell energy and increasing the battery. The safety of batteries must be guaranteed from the cell to the module, the pack, and the system, and it must not be ignored at every step. The separator is highlighted at the cell level as it plays an essential part in safety. To guarantee the safety of large-scale LIBs, it is essential to employ a ceramic-coated separator (CCS). To secure thermal stability using CCSs, the certain thickness of ceramic coating layer (CCL) is required. In contrast, the thicker CCL can act as a resistive layer in the cell, and in the worst case, the ceramic that has fallen off the CCS surface can act as a side reactant in the cell. However, if the CCL is thin, the desired thermal stability may not be obtained. The key technology is to improve adhesion while reducing the thickness of the CCL. For this purpose, polydopamine nano layer is preliminary introduced on the surface of ceramic particles via simple solution polymerization. Then, poly(acrylic acid) binder, which can react with amine groups in polydopamine, is chosen for aqueous ceramic coating slurry. Thus, this combination can make several crosslinking points within CCL, which lead to higher adhesion within the CCL after electrolyte impregnation. As a result, the adhesion within the CCL of cross-linked CCS is increased by 70% compared to the non-crosslinked CCS. Furthermore, the adhesion does not decrease when impregnated with the electrolyte. Also, cross-linked CCS showed better shrinkage property than commercialized CCS with the same composition because the cross-linked CCS did not shrink even when exposed for 1 hour at a high temperature of 160 °C. From this study, with crosslinking reaction within coating layer, it is possible to improving heat resistance and physical properties of separator without increasing thickness of CCL.
    Type of Medium: Online Resource
    ISSN: 2151-2043
    URL: Article
    DOI: 10.1149/MA2022-01552259mtgabs
    Language: Unknown
    Publisher: The Electrochemical Society
    Publication Date: 2022
    detail.hit.zdb_id: 2438749-6
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  • 10
    Online Resource
    Online Resource
    New Analytical Method to Reveal the Adhesion Properties in the Composite Electrodes for Lithium-Ion Batteries
    The Electrochemical Society ; 2019
    In:  ECS Meeting Abstracts Vol. MA2019-01, No. 5 ( 2019-05-01), p. 511-511
    Details
    In: ECS Meeting Abstracts, The Electrochemical Society, Vol. MA2019-01, No. 5 ( 2019-05-01), p. 511-511
    Abstract: Adhesion properties such as adhesion strength within the composite electrodes are receiving considerable attention as their loading levels increase ceaselessly for higher energy density. Without controlling those properties appropriately within the electrode, not only short-term electrochemical performance but also long-term reliability cannot be secured. To address this limitation, a new analysis tool, surface and interfacial cutting analysis system (SAICAS), has been developed and utilized to investigate the adhesion properties of the composite electrodes for lithium-ion batteries (LIBs). Comparing to the conventional peel test, the SAICAS can provide the horizontal force during peeling process at any depths in the composite electrode. So, those horizontal forces have some relationship with the real adhesion strength. In this work, we will introduce the measuring principles and applications of the SAICAS for the composite electrodes of LIBs. With a number of composite electrodes having different compositions and design parameters (loading and density), we confirm that the SAICAS can provide reliable adhesion strengths in the bulk as well as at the interface. Moreover, with the adhesion strengths at different depths, the polymeric distribution within the electrode can be estimated directly and efficiently without conducting complex and time-consuming post analysis works.
    Type of Medium: Online Resource
    ISSN: 2151-2043
    URL: Article
    DOI: 10.1149/MA2019-01/5/511
    Language: Unknown
    Publisher: The Electrochemical Society
    Publication Date: 2019
    detail.hit.zdb_id: 2438749-6
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