Byungil Hwang

SURFACE-ENERGY-DRIVEN SELECTIVE SOLDERING OF SN-58BI ON HOLEY POLYIMIDE FOR LOW-TEMPERATURE, ROBUST FLEXIBLE INTERCONNECTS

Heebo Ha, S. K. Choi, Péter Baumli, Chih‐Ming Chen et autres

Reliable fine-pitch interconnects remain a critical challenge for next-generation flexible electronics, as conventional anisotropic conductive films (ACFs) suffer from stochastic particle distribution, unstable electrical contacts, and limited mechanical robustness under deformation. Herein, we report a low-temperature, surface-energy-driven selective soldering strategy that enables …

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Reliability-Oriented Design of Low-Temperature Sn–Bi Solder Interconnects for Advanced Packaging Systems

Eunsung KIM, Heebo Ha, Yuntae LEE, Dragan Marinković et autres

The rapid growth of artificial intelligence, electric vehicles, and high-performance computing has accelerated the demand for miniaturized and thermally reliable electronic packages. As front-end scaling approaches its physical limits, advanced packaging has become central to improving system performance. However, heterogeneous integration, 2.5D/3D …

Advances in Solar‐Driven Interfacial Evaporation: A Review of Carbon‐ and Biomass‐Based Absorbers

Sandra Prasanth, Sujith Lal, Heebo Ha, Sooman Lim et autres

Solar‐driven interfacial evaporation (SDIE) has rapidly emerged as a sustainable, efficient strategy for water purification and desalination by localizing photothermal conversion at the air–water interface. This review compares carbon‐based and bioderived absorbers, detailing their mechanisms, material innovations, and practical performance. Carbon‐based materials, …

Tab-to-Busbar Interconnections in EV Battery Packs: An Introductory Review of Typical Welding Methods

Sooyong Choi, Sooman Lim, Ali Shan, Jinkyu Lee et autres

This paper reviews tab-to-busbar interconnections in lithium-ion battery packs, focusing on resistance welding (RW), laser beam welding (LBW), and ultrasonic welding (USW). The functional roles of tabs and busbars and typical material choices (Al-, Cu-, and Ni-plated Cu) are outlined. Subsequently, the …

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Sustainable Synthesis of Structurally Robust LiNi 1/3 Mn 1/3 Co 1/3 O 2 Cathodes with Enhanced Electrochemical Performance for Lithium‐Ion Batteries

Thirumalaisamy Kiruthika, Chunghyeon Choi, D. Lakshmi, Suryaprabha Thirumalaisamy et autres

This study reports on the green synthesis of high‐performance LiNi 1/3 Mn 1/3 Co 1/3 O 2 (NMC111) cathode materials using Actinidia deliciosa (kiwi) extract as a natural chelating and reducing agent. The electrochemical and structural performance of the green‐synthesized NMC (GS‐NMC) …

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Design of Scalable and Flexible Supercapacitors Based on Mulberry Paper: Optimizing Electrochemical Performance and Reliability

Seong‐Hun Lee, Ji Young Park, Hyungsub Yoon, Yubin Park et autres

Paper-based supercapacitors are emerging as promising alternatives for next-generation wearable energy storage applications, attributed to their renewable feedstocks, scalability, flexibility, and lightweight properties. However, the inherent limited electrochemical conductivity and poor stability of paper remain significant challenges for making high-performance applications. In …

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Thermally Stable Al2O3/PTFE Composite Separator for High-Safety Lithium-Ion Batteries

Kwang Won Kim, Ji Hyun Lee, Seoyoon Shin, Ilgyu Kim et autres

High Resolution Image Download MS PowerPoint Slide In response to the growing demand for carbon neutrality and safer energy storage, advanced separator technology is essential for ensuring the stability of lithium-ion batteries (LIBs). Conventional separators, typically made from polyolefin-based polymers, suffer from …

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Overview of Thermal Management Solution for 3D Integrated Circuits Using Carbon-Nanotube-Based Silicon Through-Vias

Heebo Ha, Hongju Kim, Sumin Lee, Sooyong Choi et autres

Three-dimensional integrated circuit (3D IC) technology is an innovative approach in the semiconductor industry aimed at enhancing performance and reducing power consumption. However, thermal management issues arising from high-density stacking pose significant challenges. Carbon nanotubes (CNTs) have gained attention as a promising …

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Biomimetic hierarchical FeS-functionalized 3D cotton architectures inspired by floral morphology for enhanced solar-driven desalination and wastewater remediation

Sujith Lal, M. Venkatesh Prabhu, R. Sreehari, Byungil Hwang et autres

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Effect of Chemical Etching on the Supercapacitive Performance of Electroless Ni-B Coatings

Máté Czagány, Gábor Mészáros, Dániel Koncz‐Horváth, Adrienn Hlavács et autres

In our study, supercapacitor electrodes were prepared by depositing electroless Ni-B coating on copper plates, followed by nitric acid etching. The composition and the micro- and phase structure of the coatings were investigated by ICP-OES, PFIB-SEM, and XRD techniques. The original pebble-like …

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An Introductory Review of Carbon Nanotube-Based Sensors: Mechanisms, Fabrication, and Applications

S. K. Choi, Byungil Hwang

Carbon nanotubes (CNTs) have attracted significant attention in sensor technologies due to their exceptional electrical conductivity, mechanical flexibility, and high surface reactivity. This review provides an in-depth overview of CNT-based sensors, covering their working principles, fabrication techniques, and major application areas. We …

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Recent Advances in Liquid Metal-Based Stretchable and Conductive Composites for Wearable Sensor Applications

Boo Young Kim, Wan Yusmawati Wan Yusoff, Paolo Matteini, Péter Baumli et autres

Liquid metals (LMs), with their unique combination of high electrical conductivity and mechanical deformability, have emerged as promising materials for stretchable electronics and biointerfaces. However, the practical application of bulk LMs in wearable sensors has been hindered by processing challenges and low …

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