Research Areas Energy Storage Materials & Systems

Research Interests DEVELOPMENTS OF HIGH-ENERGY-DENSITY RECHARGEABLE BATTERIES
Traditional rechargeable batteries have already reached the limitation of electrochemical performances in terms of both energy and power density. Utilizing advanced electrochemistry and materials chemistry, our research group develops energy-dense electrode host materials, negative electrodes in particular which range from practical to next-generation materials, based on molecular-scale design to address their chronic issues such as dimensional collapse and low electrical conductivity. This can be achieved by specimen-level (structure or interface engineering of host) and/or electrode-level (multi-functional polymeric binders or polymeric separator membranes). By integrating novel electrode components, we aim at developing advanced (and/or beyond Li) rechargeable batteries with high-energy density and fast-charging capability for electrified applications.

MULTIMODAL OPERANDO (IN-SITU) ANALYSIS OF ELECTROCHEMICAL REACTIONS
The complexity of interface or bulk electrochemical reactions during battery operation has posed a significant challenge for battery scientists to take the next step toward the development of next-generation battery materials. In our group, multimodal operando or in-situ analysis of battery materials has been studied to obtain an insight into the design rationale for advanced battery development. Multi-scale spectroscopy analysis is expected to provide near-surface electrolyte solvation structure, intermediate speciation of electrolyte, charge-transport mechanism, and electrochemical reversibility while microscopy analysis provides structural change, charge storage mechanism, and electro-mechanical information.

Selected Publications Jieun Kang, Dong-Yeob Han, Sungho Kim, Jaegeon Ryu*, Soojin Park*, “Multiscale Polymeric Materials for Advanced Lithium Battery Applications”, Advanced Materials 34 (2022) 2203194.

Jaegeon Ryu†*, Dong-Yeob Han†, Dongki Hong, Soojin Park*, “A Polymeric Separator Membrane with Chemoresistance and High Li-ion Flux for High-Energy-Density Lithium Metal Batteries”, Energy Storage Materials 45 (2022) 941-951.

Jaegeon Ryu†, Taesoo Bok†, Se Hun Joo†, Seokkeun Yoo, Gyujin Song, Su Hwan Kim, Sungho Choi, Hu Young Jeong, Min Gyu Kim, Seok Ju Kang, Chongmin Wang*, Sang Kyu Kwak*, Soojin Park*, “Electrochemical Scissoring of Disordered Silicon-Carbon Composites for High-Performance Lithium Storage”, Energy Storage Materials 36 (2021) 139-146.

Jaegeon Ryu†, Sungho Kim†, Jimin Kim†, Sooham Park, Seungho Lee, Seokkeun Yoo, Jangbae Kim, Nam-Soon Choi, Ja-Hyoung Ryu*, Soojin Park*, “Room-Temperature Cross-Linkable Natural Polymer Binder for High-Rate and Stable Silicon Anode”, Advanced Functional Materials 30 (2020) 1908433.

Onur Buyukcakir†*, Jaegeon Ryu†, Se Hun Joo†, Jieun Kang, Recep Yuksel, Jiyun Lee, Yi Jiang, Sungho Choi, Sun Hwa Lee, Sang Kyu Kwak*, Soojin Park*, Rodney S. Ruoff*, “Lithium Accommodation in a Redox-Active Covalent Triazine Framework for High Areal Capacity and Fast-Charging Lithium-Ion Batteries”, Advanced Functional Materials 30 (2020) 2003761

Jaegeon Ryu†, Ji Hui Seo†, Gyujin Song, Keunho Choi, Dongki Hong, Chongmin Wang, Hosik Lee, Jun Hee Lee*, Soojin Park*, “Infinitesimal Sulfur Fusion Yields Quasi-Metallic Bulk Silicon for Stable and Fast Energy Storage”, Nature Communications 10 (2019) 2351.

Jaegeon Ryu†, Tianwu Chen†, Taesoo Bok†, Gyujin Song, Jiyoung Ma, Chihyun Hwang, Langli Luo, Hyun-Kon Song, Jaephil Cho, Chongmin Wang*, Sulin Zhang*, Soojin Park*, “Mechanical Mismatch-Driven Rippling in Carbon-Coated Silicon Sheets for Stress-Resilient Battery Anodes”, Nature Communications 9 (2018) 2924.

Professional Experience 2018-2020, 박사후 연구원(포항공과대학교)
2020-2022, 박사후 연구원(Pacific Northwest National Laboratory)