Publications

Selected  (* correspondence)

@ MIT (Dept. of Materials Sci. & Eng., June 2001 - June 2003)

1.  S.-Y. Chung, J. T. Bloking, and Y.-M. Chiang*, “Electronically Conductive Phospho-Olivines as Lithium Storage Electrodes,” Nature Materials 1, 123-128 (2002); Featured in News & Views by Michael Thackeray, 81-82 (2002); Editorial, "The Business of Science", Nature Materials 5, 921 (2006); Business, "Drilling for Nanotech Gold", Nature 444, 16-17 (2006). 

2.  S. Wang, E. S. Humphreys, S.-Y. Chung, D. F. Delduco, S. R. Lustig, H. Wang, K. N. Parker, N. W. Rizzo, S. Subramoney, Y.-M. Chiang, and A. Jagota*, “Peptides with Selective Affinity for Carbon Nanotubes,” Nature Materials 2, 196-200 (2003).

3.  S.-Y. Chung and Y.-M. Chiang*, “Microscale Measurements of the Electrical Conductivity of Doped LiFePO4,” Electrochemical and Solid-State Letters 6, A278-A281 (2003).

@ Inha Univ. (Dept. of Materials Sci. & Eng., September 2003 - January 2012)

4.  S.-Y. Chung*, I.-D. Kim, and S.-J. L. Kang, “Strong Nonlinear Current-Voltage Behaviour in Perovskite-Derivative Calcium Copper Titanate,” Nature Materials 3, 774-778 (2004).

5.  S.-Y. Chung*, “Lattice Distortion and Polarization Switching in Calcium Copper Titanate,” Applied Physics Letters 87, 052901 (2005).

6.  S.-Y. Chung*, S.-Y. Choi, T. Yamamoto, Y. Ikuhara, and S.-J. L. Kang, “Site-Selectivity of 3d Metal Cation Dopants and Dielectric Response in Calcium Copper Titanate,” Applied Physics Letters 88, 091917 (2006).

7.  S.-Y. Chung*, S.-Y. Choi, T. Yamamoto, and Y. Ikuhara, “Inherent Nanoscale Bend of Crystal Lattice in Fe-Doped Calcium Copper Titanate,” Applied Physics Letters 89, 121903 (2006).

8.  S.-Y. Chung*, S.-I. Lee, J.-H. Choi, and S.-Y. Choi, “Initial Cation Stoichiometry and Current-Voltage Behavior in Sc-Doped Calcium Copper Titanate,” Applied Physics Letters 89, 191907 (2006).

9.  S.-Y. Chung*, J.-H. Choi, and J.-K. Choi, “Tunable Current-Voltage Characteristics in Polycrystalline Calcium Copper Titanate,” Applied Physics Letters 91, 091912 (2007).

10.  S.-Y. Chung*, S.-Y. Choi*, T. Yamamoto, and Y. Ikuhara, “Atomic-Scale Visualization of Antisite Defects in LiFePO4,” Physical Review Letters 100, 125502 (2008).

11.  S.-Y. Chung†*, S.-Y. Choi†, T. Yamamoto, and Y. Ikuhara, “Orientation-Dependent Arrangement of Antisite Defects in Lithium Iron(II) Phosphate Crystals,” Angewandte Chemie International Edition 48, 543-546 (2009) (†equal contribution).

12.  S.-Y. Choi†, S.-Y. Chung†*, T. Yamamoto, and Y. Ikuhara, “Direct Determination of Dopant Site Selectivity in Ordered Perovskite CaCu3Ti4O12 Polycrystals by Aberration-Corrected STEM,” Advanced Materials 21, 885-889 (2009) (†equal contribution); Highlighted in NPG Asia Materials.

13.  S.-Y. Chung*, Y.-M. Kim, J.-G. Kim, and Y.-J. Kim, “Multiphase Transformation and Ostwald’s Rule of Stages during Crystallization of a Metal Phosphate,” Nature Physics 5, 68-73 (2009);  News & Views by Simon J. L. Billinge, 13-14 (2009); Highlighted in NPG Asia Materials.

14.  S.-Y. Chung*, Y.-M. Kim, and S.-Y. Choi, “(Feature Article) Direct Physical Imaging and Chemical Probing of LiFePO4 for Lithium-Ion Batteries,” Advanced Functional Materials 20, 4219-4232 (2010).

15.  S.-Y. Chung*, J.-G. Kim, Y.-M. Kim, and Y.-B. Lee, “Three-Dimensional Morphology of Iron Phosphide Phases in a Polycrystalline LiFePO4 Matrix,” Advanced Materials 23, 1398-1403 (2011).

@ KAIST (February 2012 - present)

16.  S.-Y. Chung*, “Comment on ‘Positive Electrode Materials for Li-Ion and Li-Batteries’,” Chemistry of Materials 24, 2240-2243 (2012).

17.  S.-Y. Chung*, S.-Y. Choi*, S. Lee, and Y. Ikuhara, “Distinct Configurations of Antisite Defects in Ordered Metal Phosphates: Comparison between LiMnPO4 and LiFePO4,” Physical Review Letters 108, 195501 (2012).

18.  S.-Y. Chung*, Y.-M. Kim, S. Lee, S. H. Oh, J.-G. Kim, S.-Y. Choi, Y.-J. Kim, and S.-J. L. Kang, “Cation Disordering by Rapid Crystal Growth in Olivine-Phosphate Nanocrystals,” Nano Letters 12, 3068-3073 (2012).

19.  S.-Y. Chung*, Y.-M. Kim, S.-Y. Choi, and J.-G. Kim, “Real-Time Observation of Crystal Evaporation in a Metal Phosphate at High Temperature,” Journal of the American Chemical Society 135, 7811-7814 (2013).

20.  S.-Y. Chung*, Y.-M. Kim, S.-Y. Choi, and J.-G. Kim, “Capturing Heterogeneous Nucleation of Nanoscale Pits and Subsequent Crystal Shrinkage during Ostwald Ripening of a Metal Phosphate,” ACS Nano 9, 327-335 (2015).

21. S.-Y. Chung†*, S.-Y. Choi†, T.-H. Kim, and S. Lee, “Surface-Orientation-Dependent Distribution of Subsurface Cation-Exchange Defects in Olivine-Phosphate Nanocrystals,” ACS Nano 9, 850-859 (2015) (†equal contribution).

22. H. Ryoo, H. B. Bae, Y.-M. Kim, J.-G. Kim, S. Lee, and S.-Y. Chung*, “Frenkel-Defect-Mediated Chemical Ordering Transition in a Li-Mn-Ni Spinel Oxide,” Angewandte Chemie International Edition 54, 7963-7967 (2015); Highlighted on the Inside Back Cover.

23. S.-Y. Chung†*, S.-Y. Choi†, J.-G. Kim, and Y.-M. Kim, “Quadruple-Junction Lattice Coherency and Phase Separation in a Binary-Phase System,” Nature Communications 6, 8252 (2015) (†equal contribution).

24. J. H. Kim, S.-Y. Choi, M. Choi, T. Gershon, Y. S. Lee, W. Wang, B. Shin, and S.-Y. Chung*, “Atomic-Scale Observation of Oxygen Substitution and Its Correlation with Hole-Transport Barriers in Cu2ZnSnSe4 Thin-Film Solar Cells,” Advanced Energy Materials 6, 1501902 (2016); Highlighted as a Frontispiece.

25. H. J. Lee†, J. H. Lee†, S.-Y. Chung*, and J. W. Choi*, “Enhanced Pseudocapacitance in Multicomponent Transition-Metal Oxides by Local Distortion of Oxygen Octahedra,” Angewandte Chemie International Edition 55, 3958-3962 (2016) (†equal contribution).  

26. S.-Y. Chung*, S.-Y. Choi, H.-I. Yoon, H.-S. Kim, and H. B. Bae, “Subsurface Space-Charge Dopant Segregation to Compensate Surface Excess Charge in a Perovskite Oxide,” Angewandte Chemie International Edition 55, 9680-9684 (2016).

27. H.-S. Kim, A. Jang, S.-Y. Choi, W. Jung, and S.-Y. Chung*, “Vacancy-Induced Electronic Structure Variation of Acceptors and Correlation with Proton Conduction in Perovskite Oxides,” Angewandte Chemie International Edition 55, 13499-13503 (2016); Highlighted on the Inside Back Cover.

28. S.-Y. Chung†*, S.-Y. Choi†, T.-H. Kim, and S. Lee, “Subsurface Distribution of Antisite Defects in LiMnPO4: Direct Comparison with LiFePO4,” The Journal of Physical Chemistry C 120, 25985-25989 (2016) (†equal contribution).

29. J. T. Song, H. Ryoo, M. Cho, J. Kim, J.-G. Kim, S.-Y. Chung, and J. Oh*, “Nanoporous Au Films on Si Photoelectrodes for Selective and Efficient Photoelectrochemical CO2 Reduction,” Advanced Energy Materials 7, 1601103 (2017); Highlighted on the Inside Front Cover.

30. H. Palneedi, D. Maurya, G.-Y. Kim, V. Annapureddy, M.-S. Noh, C.-Y. Kang, J.-W. Kim, J.-J. Choi, S.-Y. Choi, S.-Y. Chung, S.-J. L. Kang, S. Priya, and J. Ryu*, “Unleashing the Full Potential of Magnetoelectric Coupling in Film Heterostructures,” Advanced Materials 29, 1605688 (2017); Highlighted on the Back Cover.

31. J. Oh, J. W. Choi, C. T. Yavuz, S.-Y. Chung, J. Y. Park, and Y. Jung, “(Energy Focus) EEWS 2016: Progress and Perspectives of Energy Science and Technology,” ACS Energy Letters 2, 592-594 (2017).

32. J. Bak, H. B. Bae, J. Kim, J. Oh, and S.-Y. Chung*, “Formation of Two-Dimensional Homologous Faults and Oxygen Electrocatalytic Activities in a Perovskite Nickelate,” Nano Letters 17, 3126-3132 (2017).

33. H.-I. Yoon†, D.-K. Lee†, H. B. Bae, G.-Y. Jo, H.-S. Chung, J.-G. Kim, S.-J. L. Kang, and S.-Y. Chung*, “Probing Dopant Segregation in Distinct Cation Sites at Perovskite Oxide Polycrystal Interfaces,” Nature Communications 8, 1417 (2017) (†equal contribution).

34. H.-S. Kim, H. B. Bae, W. Jung, and S.-Y. Chung*, “Manipulation of Nanoscale Intergranular Phases for High Proton Conduction and Decomposition Tolerance in BaCeO3 Polycrystals,” Nano Letters 18, 1110-1117 (2018).

35. J. H. Lee, H. J. Lee, S. H. Choi, J. Shin, S.-Y. Chung, and J. W. Choi*, “Superlattice Formation of Crystal Water in Layered Double Hydroxides for Long-Term and Fast Operation of Aqueous Rechargeable Batteries,” Advanced Energy Materials 8, 1703572 (2018).

36. P. Byeon, H. B. Bae, H.-S. Chung, S.-G. Lee, J.-G. Kim, H. J. Lee, J. W. Choi, and S.-Y. Chung*, “Atomic-Scale Observation of LiFePO4 and LiCoO2 Dissolution Behavior in Aqueous Solutions,” Advanced Functional Materials 28, 1804564 (2018); Highlighted on the Inside Front Cover.

37. Y. Heo†, S. Choi†, J. Bak, H.-S. Kim, H. B. Bae, and S.-Y. Chung*, “Symmetry-Broken Atom Configurations at Grain Boundaries and Oxygen Evolution Electrocatalysis in Perovskite Oxides,” Advanced Energy Materials 8, 1802481 (2018) (†equal contribution); Highlighted on the Front Cover.

38. N. W. Kwak, S. J. Jeong, H. G. Seo, S. Lee, Y. Kim, J. K. Kim, P. Byeon, S.-Y. Chung, and W. Jung*, “In Situ Synthesis of Supported Metal Nanocatalysts through Heterogeneous Doping," Nature Communications 9, 4829 (2018).

39. H. Ryoo, S.-G. Lee, J.-G. Kim, and S.-Y. Chung*, “Effect of Chemical Bonding Characteristics on Ordering Structure in Li Spinel Oxides,” Advanced Functional Materials 29, 1805972 (2019); Highlighted on the Front Cover.

40. P. Byeon, H. J. Lee, J. W. Choi, and S.-Y. Chung*,  “(invited Concept Article) Atomic-Scale Direct Identification of Surface Variations in Cathode Oxides for Aqueous and Nonaqueous Lithium-Ion Batteries,” ChemSusChem 12, 787-794 (2019).

41. J. Bak, H. B. Bae, and S.-Y. Chung*, “Atomic-Scale Perturbation of Oxygen Octahedra via Surface Ion Exchange in Perovskite Nickelates Boosts Water Oxidation,” Nature Communications 10, 2713 (2019).

42. C. W. Song†, H. Suh†, J. Bak, H. B. Bae, and S.-Y. Chung*, "Dissolution-Induced Surface Roughening and Oxygen Evolution Electrocatalysis of Alkaline-Earth Iridates in Acid," Chem 5, 3243-3259 (2019). (†equal contribution)

43. J. Bak, H. B. Bae, C. Oh, J. Son*, and S.-Y. Chung*, "Effect of Lattice Strain on the Formation of Ruddlesden-Popper Faults in Heteroepitaxial LaNiO3 for Oxygen Evolution Electrocatalysis," The Journal of Physical Chemistry Letters 11, 7253-7260 (2020); Highlighted as a Supplementary Cover. 

44. H. J. Jung, Y. Lim, B.-U. Choi, H. B. Bae, W. Jung, S. Ryu, J. Oh, and S.-Y. Chung*, "Direct Identification of Antisite Cation Intermixing and Correlation with Electronic Conduction in CuBi2O4 for Photocathodes," ACS Applied Materials & Interfaces 11, 43720-43727 (2020).

45. C. W. Song, J. Lim, H. B. Bae, and S.-Y. Chung*, "Discovery of Crystal Structure-Stability Correlation in Iridates for Oxygen Evolution Electrocatalysis in Acid," Energy & Environmental Science 13, 4178-4188 (2020); Highlighted on the Back Cover.

46.  J. Bak†, Y. Heo†, T. G. Yun, and S.-Y. Chung*, "Atomic-Level Manipulations in Oxides and Alloys for Electrocatalysis of Oxygen Evolution and Reduction," ACS Nano 14,14323-14354 (2020) (†equal contribution); Highlighted on the Front Cover.

47.  T. G. Yun, Y. Heo, H. B. Bae, and S.-Y. Chung*, "Elucidating Intrinsic Contribution of d-Orbital States to Oxygen Evolution Electrocatalysis in Oxides," Nature Communications 12, 824 (2021); Featured in Editors' Highlights (Focus-Catalysis).

48. P. Byeon, Y. Hong, H. B. Bae, J. Shin, J. W. Choi*, and S.-Y. Chung*, "Atomic-Scale Unveiling of Multiphase Evolution during Hydrated Zn-Ion Insertion in Vanadium Oxide," Nature Communications 12, 4599 (2021).

49. Y. Hong, P. Byeon, J. Bak, Y. Heo, H.-S. Kim, H. B. Bae, and S.-Y. Chung*, "Local-Electrostatics-Induced Oxygen Octahedral Distortion in Perovskite Oxides and Insight into the Structure of Ruddlesden-Popper Phases," Nature Communications 12, 5527 (2021).

50. J. Bak†, T. G. Yun†, J.-S. An, H. B. Bae, and S.-Y. Chung*, "Comparison of Fe-Enhanced Oxygen Evolution Electrocatalysis in Amorphous and Crystalline Nickel Oxides to Evaluate the Structural Contribution," Energy & Environmental Science 15, 610-620 (2022) (†equal contribution); Highlighted on the Inside Front Cover.

51. T. G. Yun†, Y. Sim†, Y. Lim†, D. Kim†, J.-S. An, H. Lee, Y. Du, and S.-Y. Chung*, "Surface Dissolution and Amorphization of Electrocatalysts during Oxygen Evolution Reaction: Atomistic Features and Viewpoints," Materials Today 58, 221-237 (2022) (†equal contribution). 

52. H.-S. Kim†, J.-S. An†, H. B. Bae, and S.-Y. Chung*, "Atomic-Scale Observation of Premelting at 2D Lattice Defects inside Oxide Crystals," Nature Communications 14, 2255 (2023) (†equal contribution); Featured in News & Views by Lu Shi, Nature Nanotechnology 18, 552 (2023).

53. J.-S. An, H.-S. Lee, P. Byeon, D. Kim, H. B. Bae, S.-Y. Choi, J. Ryu, and S.-Y. Chung*, "Unveiling of Interstice-Occupying Dopant Segregation at Grain Boundaries in Perovskite Oxide Dielectrics for a New Class of Ceramic Capacitors," Energy & Environmental Science 16, 1992-2002 (2023); Highlighted on the Inside Front Cover.

54. M.-J. Choi, L. Wang*, K. A. Stoerzinger, S.-Y. Chung, S. A. Chambers, and Y. Du*, "Epitaxial Design of Complex Nickelates as Electrocatalysts for Oxygen Evolution Reaction," Advanced Energy Materials 13, 2300239 (2023); Highlighted on the Front Cover.

55. D. Kim†, J. Hwang†, P. Byeon†, W. Kim, D. G. Kang, H. B. Bae, S.-G. Lee, S. M. Han, J. Lee*, and S.-Y. Chung*, "Direct Probing of Lattice-Strain-Induced Oxygen Release in LiCoO2 and Li2MnO3 without Electrochemical Cycling," Advanced Materials 35, 2212098 (2023) (†equal contribution); Highlighted on the Inside Front Cover.

56. C. Lee†, Y. Hong†, D. Kim†, Y. Lim, J. W. Choi*, and S.-Y. Chung*, "Metal Ions versus Protons: Tracking of Charge-Carrier Insertion into a Cathode Oxide in Aqueous Rechargeable Batteries," Advanced Functional Materials 33, 2303763 (2023) (†equal contribution); Highlighted on the Inside Front Cover.