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9. Review of the Mechanistic and Structural Assessment of Binders in Electrodes for Lithium-Ion Batteries.

Author

Yoon, Hyungsub, Behera, Promoda, Lim, Sooman, Yun, Tae Gwang, Hwang, Byungil, and Cheong, Jun Young

Subjects
LITHIUM-ion batteries, BINDING agents, ELECTRODES, ELECTRIC batteries, CATHODES, ANODES
Abstract

With the continual increase in CO2 levels and toward a sustainable society, developing high-performance lithium-ion batteries (LIBs) is crucial. A suitable electrode design is the key to enhancing the quality of battery cells (e.g., cycle retention characteristics and rate capabilities), and the binder plays an important role in providing sufficient adhesion between the active material, conductive agent, and current collector. Despite significant advances in the development of novel binder materials and solutions that can be employed as anode and cathode materials, careful investigations and summaries of the assessment methods for binder materials remain lacking. In this review, we examine the different analyses used to assess the quality of binder materials and how they help in assessing the quality of the electrode design. In addition, future perspectives on binder assessment are presented, which can be applied to future research directed toward binder development for advanced LIBs or post-LIBs. [ABSTRACT FROM AUTHOR]

Published
2024
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28. Highly Reliable Yarn-Type Supercapacitor Using Conductive Silk Yarns with Multilayered Active Materials.

Author

Seo, Youngjae, Ha, Heebo, Cheong, Jun Young, Leem, Mirine, Darabi, Sozan, Matteini, Paolo, Müller, Christian, Yun, Tae Gwang, and Hwang, Byungil

Subjects
POLYMER electrodes, MULTIWALLED carbon nanotubes, YARN, ENERGY density, POWER density, SILK
Abstract

Copyright of Journal of Natural Fibers is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2022
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31. Recycling non-food-grade tree gum wastes into nanoporous carbon for sustainable energy harvesting

Author

Venkateshaiah, Abhilash, primary, Cheong, Jun Young, additional, Shin, Sung-Ho, additional, Akshaykumar, K. P., additional, Yun, Tae Gwang, additional, Bae, Jaehyeong, additional, Wacławek, Stanisław, additional, Černík, Miroslav, additional, Agarwal, Seema, additional, Greiner, Andreas, additional, Padil, Vinod V. T., additional, Kim, Il-Doo, additional, and Varma, Rajender S., additional

Published
2020
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36. Three-Dimensional Nanofibrous Air Electrode Assembled With Carbon Nanotubes-Bridged Hollow Fe2O3Nanoparticles for High-Performance Lithium–Oxygen Batteries

Author

Jung, Ji-Won, Jang, Ji-Soo, Yun, Tae Gwang, Yoon, Ki Ro, and Kim, Il-Doo

Abstract

Lithium–oxygen batteries have been considered as one of the most viable energy source options for electric vehicles due to their high energy density. However, they are still faced with technical challenges, such as low round-trip efficiency and short cycle life, which mainly originate from the cathode part of the battery. In this work, we designed a three-dimensional nanofibrous air electrode consisted of hierarchically structured carbon nanotube-bridged hollow Fe2O3nanoparticles (H-Fe2O3/CNT NFs). Composite nanofibers consisted of hollow Fe2O3NPs anchored by multiple CNTs offered enhanced catalytic sites (interconnected hollow Fe2O3NPs) and fast charge-transport highway (bridged CNTs) for facile formation and decomposition of Li2O2, leading to outstanding cell performance: (1) Swagelok cell exhibited highly reversible cycling characteristics for 250 cycles with a fixed capacity of 1000 mAh g–1at a current density of 500 mA g–1. (2) A module composed of two pouch-type cells stably powered an light-emitting diode lamp operated at 5.0 V.

Published
2024
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49. Rational design of conductive metal-organic frameworks and aligned carbon nanofibers for enhancing the performance of flexible supercapacitors.

Author

Kim D, Yun TG, Lee JH, Yoon KR, and Kim K

Abstract

Carbonaceous materials are attractive active materials for the manufacture of flexible electrochemical double-layer capacitors (EDLCs) because of their high electrical conductivity, large surface area, and inherent resilience against deformation. However, compared to pseudocapacitors, which store electrochemical energy via faradaic redox reactions, EDLCs generally exhibit inferior energy density. One potential approach to addressing this issue is to incorporate highly porous and electrically conductive materials into carbonaceous material-based EDLCs. In this paper, we present a hybrid electrode consisting of a conductive metal-organic framework (c-MOF) with high electrical conductivity and unique porous structure combined with a mat of aligned carbon nanofibers (ACNFs). Its highly ordered structure facilitates electronic/ionic transport, increasing the areal capacitance by up to 3.9 times compared to randomly-oriented carbon nanofibers (RCNFs). An additional increase in areal capacitance (+64%) is achieved by introducing c-MOF (RCNFs: 25.4 mF cm -2 ; ACNFs: 98.7 mF cm -2 ; c-MOF/ACNF: 161.8 mF cm -2 ). Additionally, an ACNF mat exhibits excellent mechanical flexibility and electrochemical reliability, making it highly suitable for the assembly of freestanding flexible supercapacitors. By optimizing the electrochemical performance of c-MOF/ACNF and its suitability for utilization in flexible energy storage systems, this study presents a promising avenue for the practical implementation of c-MOF-based supercapacitors., Competing Interests: The authors declare no competing interests., (This journal is © The Royal Society of Chemistry.)

Published
2024
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50. Three-Dimensional Nanofibrous Air Electrode Assembled With Carbon Nanotubes-Bridged Hollow Fe 2 O 3 Nanoparticles for High-Performance Lithium-Oxygen Batteries.

Author

Jung JW, Jang JS, Yun TG, Yoon KR, and Kim ID

Abstract

Lithium-oxygen batteries have been considered as one of the most viable energy source options for electric vehicles due to their high energy density. However, they are still faced with technical challenges, such as low round-trip efficiency and short cycle life, which mainly originate from the cathode part of the battery. In this work, we designed a three-dimensional nanofibrous air electrode consisted of hierarchically structured carbon nanotube-bridged hollow Fe 2 O 3 nanoparticles (H-Fe 2 O 3 /CNT NFs). Composite nanofibers consisted of hollow Fe 2 O 3 NPs anchored by multiple CNTs offered enhanced catalytic sites (interconnected hollow Fe 2 O 3 NPs) and fast charge-transport highway (bridged CNTs) for facile formation and decomposition of Li 2 O 2 , leading to outstanding cell performance: (1) Swagelok cell exhibited highly reversible cycling characteristics for 250 cycles with a fixed capacity of 1000 mAh g -1 at a current density of 500 mA g -1 . (2) A module composed of two pouch-type cells stably powered an light-emitting diode lamp operated at 5.0 V.

Published
2018
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