19. Shuang Liu, Sungyeol Choi, Jihye Park, “A Microplasma Electrochemical Method for Spent Li-ion Battery Cathode Recycling (폐 리튬이온 배터리 캐소드 재활용을 위한 미세플라즈마 전기화학적 방법),” 10-2025-0062334, pending since 14 May 2025, Republic of Korea.

PCT pending

Selected as A-grade patent for domestic and international patent fee support by the SNU R&DB Foundation

18. Sungyeol Choi, Wonseok Yang, Geunwoo Go, Kyoung-Jae Chung, “Nuclear Power Plant Generated Gas Plasma Spectroscopic Monitoring System (원자력발전소 발생 가스 플라즈마 분광 모니터링 시스템),” 10-2025-0062800, pending since 14 May 2025, Republic of Korea.

17. Sungyeol Choi, Wonseok Yang, Taehoon Park, Jihun Kim, Changheui Jang, Hyeon-Geun Lee, Kunok Chang, “Method for Quantifying and Monitoring Impurities Causing Corrosion in Molten Salts (용융염내 부식 유발 불순물 정량 추정 방법),” 10-2025-0011206, pending since 24 January 2025, Republic of Korea.

16. Stuart Aberdeen, Sungyeol Choi, Richard I. Foster, Kawngseo Kim, “Method for Selective Recovering of Nickel and Cobalt using Deep Eutectic Solvent-based Ion Exchange Separation (천연공융용매 기반 이온 교환 분리법을 통한 니켈 및 코발트 회수 방법),” 25197224.6, pending since 21 August 2025, Europe.

Selected as A-grade patent for domestic and international patent fee support by the SNU R&DB Foundation

15. Stuart Aberdeen, Sungyeol Choi, Richard I. Foster, Kawngseo Kim, “Method for Selective Recovering of Nickel and Cobalt using Deep Eutectic Solvent-based Ion Exchange Separation (천연공융용매 기반 이온 교환 분리법을 통한 니켈 및 코발트 회수 방법),” 10-2025-0007082, pending since 17 January 2025, Republic of Korea.

PCT on 14 May 2025 (PCT/KR2025/007244)

Selected as A-grade patent for domestic and international patent fee support by the SNU R&DB Foundation

14. Richard I. Foster, Sungyeol Choi, Wonseok Yang, James Amphlett, “Method of Recycling Li-ion Battery (리튬이온 배터리 재활용 방법),” 10-2024-0120906, pending since 5 September 2024, Republic of Korea.

13.  Wonseok Yang, Sungyeol Choi, Saehyun Choi, Jihun Kim, Taehoon Park, “System for Estimating Nuclear Material Concentration and Method Thereof (핵물질 농도 추정 시스템 및 그 방법),” 18/963.707, pending since 28 November 2024, USA.

12.  Wonseok Yang, Sungyeol Choi, Saehyun Choi, Jihun Kim, Taehoon Park, “System for Estimating Nuclear Material Concentration and Method Thereof (핵물질 농도 추정 시스템 및 그 방법),” 24215438.3, pending since 26 September 2024, Europe.

11.  Wonseok Yang, Sungyeol Choi, Saehyun Choi, Jihun Kim, Taehoon Park, “System for Estimating Nuclear Material Concentration and Method Thereof (핵물질 농도 추정 시스템 및 그 방법),” 10-2816192, 29 May 2025, Republic of Korea.

10. Sungyeol Choi, Wonseok Yang, Jihun Kim, “Electrochemical Sensor for Molten Salt Reactor and Method of Measuring Nuclear Fission Product Concentration using the Same (용융염원자로용 전기화학 센서 및 이를 이용한 핵분열생성물 농도 측정 방법),” 10-2024-0019401, pending since 8 February 2024, Republic of Korea.

9. Sungyeol Choi, Wonseok Yang, Hyeongbin Kim, Richard I. Foster, “Automatic Sampling Device of Molten Salt and Method Thereof (용융염의 자동 샘플링 장치 및 방법),” 10-2023-0177464, pending since 8 December 2023, Republic of Korea.

8. Sungyeol Choi, Wonseok Yang, Tag-Gon Kim, Yonadan Choi, Jihun Kim, “Device for Electrochemical Measurement of Molten Salt and Method for the Same (용융염의 전기화학적 측정 장치 및 방법),” 10-2856627, 3 September 2025, Republic of Korea.

7. Jungho Hur, Jaeyeong Park, Sungyeol Choi, "Zirconium Recovery Process and Method for Treating Waste Zirconium (지르코늄 회수 공정 및 폐 지르코늄 처리방법)," 10-2577113, September 6, 2023.

6. Wonseok Yang, Minho Lee, James Amphlett, Sungyeol Choi, "Pool Scrubbing System for Removing Fine Dust or Radionuclide (미세먼지 또는 방사성 핵종 제거용 풀 스크러빙 시스템)," 10-2549803, June 27, 2023.

5. Il Soon Hwang, Sungjune Sohn, Jaeyeong Park, Byunggi Park, Byungchan Han, Sungyeol Choi, “Methods and Devices using Liquid Metal including Bi or Pb or Bi-Pb Alloy for Separating Actinides and Rare Earth Elements in High-level Radioactive Molten Salts from Pyroprocessing (비스무스 또는 비스무스-납 합금 액체금속을 이용하여 파이로 프로세싱에서 발생하는 고준위 방사성 용융염에 포함된 악티늄족원소군(群)과 희토류원소군을 분리하는 방법 및 이를 이용한 분리 장치),” 10-1693775, January 2, 2017.

4. Sungyeol Choi, Won Il Ko, “Apparatus for Providing Nuclear Fuel Cycle for Nuclear Power Plant and Method Thereof (원자력발전소의 핵연료주기 제공 방법 및 그 장치),” 10-1614020, April 14, 2016.

3. Kwang-Rag Kim, Jae-Hoo Jung, Seungwoo Paek, Joon-Bo Shim, Tack-Jin Kim, Kweon-ho Kang, Jaeyeong Park, Sungyeol Choi, Il Soon Hwag, “Electrolytic Recovery Device, (전해 회수 장치)” 10-1428860, August 4, 2014.

2. Il Soon Hwang, Kun Jai Lee, Byung-Gi Park, Ji Hyun Kim, Kyung Woo Yi, Hyo On Nam, Sungyeol Choi, Judong Bae, Hyo Sook Jung, “Method for Decontaminating High Level Wastes Arising from High Energy Radiation Facilities to Low-and-intermediate Level Radioactive Wastes (고에너지 방사선 시설에서 발생하는 고준위 폐기물을 중저준위 폐기물로 정화하는 방법),” 10-2011-0087907, August 3, 2012.

1. Il Soon Hwang, Chang Hyo Kim, Myung Hyun Kim, Bong Yoo, Han-Gyu Joo, Jun Lim, Dong Yoon Han, Sungyeol Choi, Jae Hyun Cho, “Proliferation-resistant Accident-tolerant Secure Capsular Autonomous Reactor, PASCAR (핵비확산적 안전ㆍ보안식 자동제어 캡슐형 원자로),” 10-1016710, February 15, 2011.