위성언  Sungun Wi
Ph.D. Candidate [WCU Program]

- Electrode materials for lithium-ion batteries
Room 131-413

Education & Career
- Seoul National University: Ph.D. in Materials Science and Engineering (2010-2017)
- Samsung Electronics (2017-)

Publications (International)
"Insights on the Delithiation/Lithiation Reactions of LixMn0.8Fe0.2PO4 Mesocrystals in Li+ Batteries by in situ Techniques"
Sungun Wi,+ Jungjin Park,+ Sangheon Lee,+ Jaewon Kim, Bumjin Gil, Alan Jiwan Yun, Yung-Eun Sung,* Byungwoo Park,* and Chunjoong Kim*
Nano Energy 39, 371 (2017).
"Breathable Carbon-Free Electrode: Black TiO2 with Hierarchically-Ordered Porous Structure for Stable Li-O2 Battery"
Joonhyeon Kang, Jinyoung Kim, Sangheon Lee, Sungun Wi, Chunjoong Kim, Seungmin Hyun, Seunghoon Nam,* Yongjoon Park,* and Byungwoo Park*
Adv. Energy Mater. 1700814 (2017).
"Single-Layer Graphene-Wrapped Li4Ti5O12 Anode with Superior Lithium Storage Capability"
Jaewon Kim,+ Kyung Eun Lee,+ Kyung Hwan Kim, Sungun Wi, Sangheon Lee, Seunghoon Nam, Chunjoong Kim,* Sang Ouk Kim,* and Byungwoo Park*
Carbon 114, 275 (2017).
"Synchrotron-Based X-Ray Absorption Spectroscopy for the Electronic Structure of LixMn0.8Fe0.2PO4 Mesocrystal in Li+ Batteries"
Sungun Wi,+ Jungjin Park,+ Sangheon Lee, Joonhyeon Kang, Taehyun Hwang, Kug-Seung Lee, Han-Koo Lee, Seunghoon Nam, Chunjoong Kim,* Yung-Eun Sung,* and Byungwoo Park*
Nano Energy 31, 495 (2017).
"Synthesis of LiMn0.8Fe0.2PO4 Mesocrystals for High-Performance Li-Ion Cathode Materials"
Sungun Wi, Jaewon Kim, Sangheon Lee, Joonhyeon Kang, Kyung Hwan Kim, Kimin Park, Kunsu Kim, Seunghoon Nam,* Chunjoong Kim,* and Byungwoo Park*
Electrochim. Acta 216, 203 (2016).
"Evaluation of Graphene-Wrapped LiFePO4 as Novel Cathode Materials for Li-Ion Batteries"
Sungun Wi,+ Jaewon Kim,+ Kimin Park,+ Sangheon Lee, Joonhyeon Kang, Kyung Hwan Kim, Seunghoon Nam,* Chunjoong Kim,* and Byungwoo Park*
RSC Adv. 6, 105081 (2016).
"Reduced Graphene Oxide/Carbon Double-Coated 3-D Porous ZnO Aggregates as High-Performance Li-Ion Anode Materials"
Sungun Wi,+ Hyungsub Woo,+ Sangheon Lee, Joonhyeon Kang, Jaewon Kim, Subin An, Chohui Kim, Seunghoon Nam, Chunjoong Kim, and Byungwoo Park*
Nanoscale Res. Lett. 10, 204 (2015).
"Effective Wrapping of Graphene on Individual Li4Ti5O12 Grains for High-Rate Li-Ion Batteries"
Yuhong Oh,+ Seunghoon Nam,+ Sungun Wi, Joonhyeon Kang, Taehyun Hwang, Sangheon Lee, Helen Hejin Park, Jordi Cabana, Chunjoong Kim,* and Byungwoo Park*
J. Mater. Chem. A 2, 2023 (2014). [Inside Back Cover]
"Enhanced Rate Capability of LiMn0.9Mg0.1PO4 Nanoplates by Reduced Graphene Oxide/Carbon Double Coating for Li-Ion Batteries"
Sungun Wi, Jaewon Kim, Seunghoon Nam, Joonhyeon Kang, Sangheon Lee, Hyungsub Woo, Moosang Lee, Chong Ho Sonu, Taeho Moon,* and Byungwoo Park*
Curr. Appl. Phys. 14, 725 (2014).
"Electronic Effect in Methanol Dehydrogenation on Pt Surfaces: Potential Control during Methanol Electrooxidation"
Joonhyeon Kang, Seunghoon Nam, Yuhong Oh, Hongsik Choi, Sungun Wi, Byungho Lee, Taehyun Hwang, Saeromi Hong, and Byungwoo Park*
J. Phys. Chem. Lett. 4, 2931 (2013).
"Preparation and Exceptional Lithium Anodic Performance of Porous Carbon-Coated ZnO Quantum Dots Derived from a Metal Organic Framework"
Seung Jae Yang, Seunghoon Nam, Taehoon Kim, Ji Hyuk Im, Heasol Jung, Jong Hun Kang, Sungun Wi, Byungwoo Park, and Chong Rae Park*
J. Am. Chem. Soc. 135, 7394 (2013).
"The Role of Carbon Incorporation in SnO2 Nanoparticles for Li Rechargeable Batteries"
Seunghoon Nam,+ Sungsoo Kim,+ Sungun Wi, Hongsik Choi, Sujin Byun, Soon-Mi Choi, Sang-Im Yoo, Kyu Tae Lee,* and Byungwoo Park*
J. Power Sources 211, 154 (2012).
"Challenges in Synthesizing Carbon-Coated LiFePO4 Nanoparticles from Hydrous FePO4 and Their Electrochemical Properties"
Seunghoon Nam, Sungun Wi, Changwoo Nahm, Hongsik Choi, and Byungwoo Park*
Mater. Res. Bull. 47, 3495 (2012).
"Facile Synthesis of Porous-Carbon/LiFePO4 Nanocomposites"
Sungun Wi, Seunghoon Nam, Yuhong Oh, Jongmin Kim, Hongsik Choi, Saeromi Hong, Sujin Byun, Suji Kang, Dong Joo Choi, Key-one Ahn, Young-Ho Kim,* and Byungwoo Park*
J. Nanopart. Res. 14, 1327 (2012).
"Review Paper: Nanoscale Interface Control for High-Performance Li-Ion Batteries"
Yuhong Oh,* Seunghoon Nam, Sungun Wi, Saeromi Hong, and Byungwoo Park*
Electron. Mater. Lett. 8, 91 (2012).

Presentations (International)
"Single-Layer Graphene-Wrapped Li4Ti5O12 Anode with Superior Lithium Storage Capability"
Jaewon Kim, Kyung Eun Lee, Kyung Hwan Kim, Sungun Wi, Sangheon Lee, Seunghoon Nam, Chunjoong Kim, Sang Ouk Kim, and Byungwoo Park
Materials Research Society (MRS) Fall Meeting. Boston, MA, November 26-December 2, 2016.
"Single-Layer Graphene-Wrapped Li4Ti5O12 Anode with Superior Lithium Storage Capability"
Jaewon Kim, Kyung Eun Lee, Kyung Hwan Kim, Sungun Wi, Sangheon Lee, Seunghoon Nam, Chunjoong Kim, Sang Ouk Kim, and Byungwoo Park
International Conference on Electronic Materials and Nanotechnology for Green Environment (ENGE2016). Jeju, Korea, November 6-9, 2016.
"Reduced Graphene Oxide/Carbon Double-Coated 3-D Porous LiMn0.8Fe0.2PO4 Aggregates as High-Rate Cathode Materials for Li-Ion Battery"
Sungun Wi, Joonhyeon Kang, Jaewon Kim, Hyungsub Woo, Sangheon Lee, and Byungwoo Park
Materials Research Society (MRS) Spring Meeting. San Francisco, CA, April 2015. [Poster by Sungun Wi]
"Reduced Graphene Oxide/Carbon Double-Coated 3-D Porous LiMn0.8Fe0.2PO4 Aggregates as High-Rate Cathode Materials for Li-Ion Battery"
Sungun Wi, Seunghoon Nam, Joonhyeon Kang, Jaewon Kim, Hyungsub Woo, and Byungwoo Park
International Conference on Electronic Materials and Nanotechnology for Green Environment (ENGE2014). Jeju, Korea, November 16-19, 2014. [Oral by Sungun Wi]
"Porous Graphene as a Smart Strategy for Wrapping SnO2"
Seunghoon Nam, Sungun Wi, Yuhong Oh, Saeromi Hong, Hyungsub Woo, Jaewon Kim, Sangheon Lee, Taehyun Hwang, Hongsik Choi, and Byungwoo Park
Materials Research Society (MRS) Fall Meeting. Boston, MA, December 2013.
"Inexpensive Wrapping of Graphene on Individual Li4Ti5O12 Grains for Superior-Rate Li-Ion Batteries"
Yuhong Oh, Seunghoon Nam, Sungun Wi, Joonhyeon Kang, Taehyun Hwang, Sangheon Lee, Jordi Cabana, Chunjoong Kim, and Byungwoo Park
Materials Research Society (MRS) Fall Meeting. Boston, MA, December 2013.
"Inexpensive Wrapping of Graphene on Individual Li4Ti5O12 Grains for Superior-Rate Li-Ion Batteries"
Yuhong Oh, Seunghoon Nam, Sungun Wi, Joonhyeon Kang, Taehyun Hwang, Sangheon Lee, and Byungwoo Park*
The 9th Tsinghua University - University of Tokyo - Seoul National University Student Workshop. Seoul, Korea, October 9-12, 2013. [Oral by Sungun Wi]
"Nanoscale Interface Control for Photoluminescence and Solar-Cell Applications"
Byungwoo Park, Hongsik Choi, Jae Ik Kim, Seunghoon Nam, Woojin Lee, Sungun Wi, Chohui Kim, and Joonhyeon Kang,
The 9th Tsinghua University - University of Tokyo - Seoul National University Student Workshop. Seoul, Korea, October 9-12, 2013.
"Graphene-Wrapped Li4Ti5O12 Anode Materials with High-Rate Capability for Li-Ion Batteries"
Yuhong Oh, Seunghoon Nam, Sungun Wi, Saeromi Hong, and Byungwoo Park
Materials Research Society (MRS) Fall Meeting. Boston, MA, November 2012. [Oral by Sungun Wi]
"The Role of Carbon Incorporation in SnO2 Nanoparticles for Li Rechargeable Batteries"
Seunghoon Nam, Sungsoo Kim, Sungun Wi, Hongsik Choi, Sujin Byun, and Byungwoo Park
Materials Research Society (MRS) Fall Meeting. Boston, MA, November 2012. [Oral by Sungun Wi]
"Graphene/Carbon Double-Coated ZnO Aggregates as High-Rate Electrode Material for Li-Ion Battery"
Sungun Wi, Seunghoon Nam, Yuhong Oh, Chohui Kim, Saeromi Hong, and Byungwoo Park
Materials Research Society (MRS) Fall Meeting. Boston, MA, November 2012. [Poster by Sungun Wi]
"Graphene-Wrapped Li4Ti5O12 Anode Materials with High-Rate Capability for Li-Ion Batteries"
Yuhong Oh, Seunghoon Nam, Sungun Wi, Saeromi Hong, and Byungwoo Park
The 13th Korea - Japan Student Symposium (Seoul National University - Tohoku University). Seoul, Korea, November 7-9, 2012.
"The Role of Carbon Incorporation in SnO2 Nanoparticles for Li Rechargeable Batteries"
Seunghoon Nam, Sungsoo Kim, Sungun Wi, Hongsik Choi, Sujin Byun, and Byungwoo Park
The 13th Korea - Japan Student Symposium (Seoul National University - Tohoku University). Seoul, Korea, November 7-9, 2012.
"Graphene/Carbon Double-Coated ZnO Aggregates as High-Rate Electrode Material for Li-Ion Battery"
Sungun Wi, Seunghoon Nam, Yuhong Oh, Chohui Kim, Saeromi Hong, Suji Kang, and Byungwoo Park
The 13th Korea - Japan Student Symposium (Seoul National University - Tohoku University). Seoul, Korea, November 7-9, 2012. [Oral by Sungun Wi]
"Mass Producible Echino-like Porous Silicon for Lithium Rechargeable Battery Anode"
Saeromi Hong, Seunghoon Nam, Yuhong Oh, Sungun Wi, and Byungwoo Park
The 13th Korea - Japan Student Symposium (Seoul National University - Tohoku University). Seoul, Korea, November 7-9, 2012.

Presentations (Domestic)