연구실 소개

• Our group aims to develop various environmental technologies pursuing carbon neutrality using electrochemistry as a tool.

  
  

  
  

  Metal Extraction from Spent Batteries

  The demand for lithium-ion batteries has been growing rapidly in recent years, so people are looking for ways to make a sustainable supply of raw materials. Also, battery wastes are being generated. Therefore, recycling metals from battery waste is required to reduce waste and make a sustainable cycle. Our team is developing electrochemical separation methods to extract valuable metal resources from discarded batteries and also recover valuable resources from brines.

  
  

  
  

  CO2 Capture & Utilization

  The increase in atmospheric CO2 levels has led to global warming and climate change, with humanity now recognizing the significance of this issue. To mitigate the problems, our group is actively developing electrochemical technologies to capture CO2 from various sources, including air, flue gas, and ocean. Furthermore, we are investigating the electrochemical reduction of CO2 into useful chemicals to enable the practical utilization of captured CO2.

  
  

  
  

  Desalination & Nutrient Recovery

  For a sustainable city system, it is essential to reduce water usage through water reuse and to save energy and cost in the water treatment process by recovering useful resources from used water. Our group is developing electrochemical ion adsorption processes to remove ionized contaminants and salts from water for water reuse. Additionally, we are developing electrodes and systems to selectively separate useful resources such as nitrogen and phosphorus through simple ion adsorption and desorption.

Publications (representative)

• [1] Seoni Kim, Michael Nitzsche, Simon B. Rufer, Jack R. Lake, Kripa K. Varanasi*, T. Alan Hatton*, Energy & Environmental Science 2023, 16, 2030-2044. “Asymmetric chloride-mediated electrochemical process for CO2 removal from oceanwater”
   [2] Jin Soo Kang†, Seoni Kim†, Jiho Kang, Hwajoo Joo, Junghwan Jang, Kyusik Jo, Subin Park, Hyoung-il Kim, Sung Jong Yoo, Jeyong Yoon*, Yung-Eun Sung*, T. Alan Hatton*, Environmental Science & Technology 2022, 56, 12602-12612. “Surface electrochemistry of carbon electrodes and faradaic reactions in capacitive deionization”

  [3] Seoni Kim†, Minjune Choi†, Jin Soo Kang, Hwajoo Joo, Byung Hyun Park, Yung-Eun Sung, Jeyong Yoon*, Catalysis Today 2021, 359, 83-89. “Electrochemical recovery of LiOH from used CO2 adsorbents”

  [4] Seoni Kim†, Jin Soo Kang†, Hwajoo Joo, Yung-Eun Sung*, Jeyong Yoon*, Environmental Science & Technology 2020, 54, 9044-6051. “Understanding the behaviors of λ-MnO2 in electrochemical lithium recovery: Key limiting factors and a route to the enhanced performance”

  [5] Jin Soo Kang†, Seoni Kim†, Dong Young Chung, Yoon Jun Son, Kyusik Jo, Xiao Su, Myeong Jae Lee, Hwajoo Joo, T. Alan Hatton, Jeyong Yoon*, Yung-Eun Sung*, Advanced Functional Materials 2020, 30, 1909387. “Rapid inversion of surface charges in heteroatom-doped porous carbon: a route to robust electrochemical desalination” 

  [6] Seoni Kim, Hwajoo Joo, Taegyun Moon, Seung-Hyun Kim, Jeyong Yoon*, Environmental Science: Processes and Impacts 2019, 21, 667-676 “Rapid and selective lithium recovery from desalination brine using and electrochemical system”

  [7] Seoni Kim, Jiye Kim, Seonghwan Kim, Jaehan Lee, Jeyong Yoon*, Environmental Science: Water Research & Technology 2018, 4, 175-182. “Electrochemical lithium recovery and organic pollutant removal from industrial wastewater of a battery recycling plant” (highlighted as front cover)

  [8] Seoni Kim, Jaehan Lee, Jin Soo Kang, Kyusik Jo, Seonghwan Kim, Yung-Eun Sung, Jeyong Yoon*, Chemosphere 2015, 125, 50-56. “Lithium recovery from brine using a λ-MnO2/activated carbon hybrid supercapacitor system”