Seoul National University · Engineering
Professor Jeeyoung Yoo's research lab specializes in advanced materials for electrochemical energy storage, with a strong focus on next-generation batteries and supercapacitors. The lab explores innovative electrolytes—particularly ionic liquids—and novel electrode architectures, such as nanoporous anodic aluminum oxide and three-dimensional current collectors, to enhance interfacial stability and performance. Key research directions include lithium metal anode protection, solid-state electrolyte development, and low-cost, environmentally friendly fabrication of conductive electrodes using self-reducible metal-organic inks. The lab integrates materials synthesis, electrochemical characterization, and interfacial engineering to address critical challenges in energy density, safety, and scalability.
Figures are computed from collected data and may differ slightly.
For decades, improvements in electrolytes and electrodes have driven the development of electrochemical energy storage devices. Generally, electrodes and electrolytes should not be developed separately due to the importance of the interaction at their interface. The energy storage ability and safety of energy storage devices are in fact determined by the arrangement of ions and electrons between the electrode and the electrolyte. In this paper, the physicochemical and electrochemical properties
Nanoporous anodic aluminium oxide (AAO) enables the direct utilization of lithium metal as an ideal anode, owing to a uniform current distribution. The electrochemical performance of the AAO separator is superior to commercial polypropylene, in terms of ionic conductivity, discharge capacity, and capacity fading.
4 V-operated all solid symmetrical supercapacitors that employ mixtures of various weight compositions with c-P<sub>4</sub>VPh and EMITFSI electrolytes have been demonstrated and characterized.
We propose a facile and cost-effective strategy for stabilizing the lithium metal–electrolyte interface <italic>via</italic> a three-dimensional stainless steel mesh (SSM) interlayer.
We introduce a novel self-reducible Cu ion complex ink, composed of formate, alkanolamine groups and poly alcohols, for the air sinterable, low-cost, environment-friendly fabrication of Cu conductive electrodes.
Conjugated Carbon Networks (CCN) contribute to the stabilization of the Li metal anode surface by fluorinated metathesis.
A bimodal redox-active ionic liquid electrolyte for high energy density supercapacitors was fabricated by the redox reaction of halide ions and size variation of ions.
An ionic liquid–polymer (IL–PVP) dielectric layer with robust mechanical strength and flexibility was fabricated by a chemical interaction between the ionic liquid and polymer. This dielectric layer allowed operation of flexible thin film transistors with high performance.
The artificial SEI layer that includes LiF can be fabricated simply through thermal curing of an F rich material on the surface of Li metal. The proposed artificial SEI layer design offers an alternative strategy for stabilizing the surface of Li metal.
Abstract Interfacial instability between Li‐metal anode (LMA) and inorganic solid‐state electrolyte (SSE) is a critical issue in all‐solid‐state Li‐metal batteries (ASSLBs). Previous studies have focused on interface modification methodology to achieve long‐term cycling stability in ASSLBs. However, strategy establishment without an in‐depth understanding of the LMA–SSE interface is limited to a phenomenological solution. Also, the fact that rechargeable batteries are operated by behavior of cha
Composite solid electrolytes (CSEs) are newly emerging components for all-solid-state Li-metal batteries owing to their excellent processability and compatibility with the electrodes. Moreover, the ionic conductivity of the CSEs is one order of magnitude higher than the solid polymer electrolytes (SPEs) by incorporation of inorganic fillers into SPEs. However, their advancement has come to a standstill owing to unclear Li-ion conduction mechanism and pathway. Herein, the dominating effect of the
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