Publications

40. H.-H. Ryu, Y.-K. Sun* “Nanorod Cathodes: A Solution for Polycrystalline Cathodes in Next-Generation Lithium Batteries” ACS Energy Lett. 2025, 10, 5512–5519.

39. G.-T. Park, H.-H. Ryu, N.-Y. Park, S.-B. Lee, Y.-K. Sun* “Single-Crystal vs Polycrystalline Cathodes for Lithium-Ion Batteries” Chem. Rev. 2025, 125, 9930–10000. 

38. V. Murugan, H.-H. Ryu, G. Chen* “Ni-Rich Li[NixMnyCo1-x-y]O₂ Single Crystals as Superior Fast Charge Cathodes for Lithium-Ion Batteries” ACS Energy Lett. 2025, 10, 2350–2358. 

37. G.-T. Park, N.-Y. Park, H.-H. Ryu, H. H. Sun, J.-Y. Hwang, Y.-K. Sun* “Nano-rods in Ni-rich layered cathodes for practical batteries” Chem. Soc. Rev. 2024 DOI: 10.1039/D3CS01110K

36.  H.-H. Ryu, H.-W. Lim, S. G. Lee, Y.-K. Sun* “Near-surface reconstruction in Ni-rich layered cathodes for high-performance lithium-ion batteries” Nat. Energy 2024, 9, 47–56. Highly Cited Papers

35. X. Jiao, X. Wang, X. Xu, Y. Wang, H.-H. Ryu, J. Park, J.-Y. Hwang, S. Xiong, Y.-K. Sun*, Z. Song, Y. Liu* “Multi-Physical Field Simulation: A Powerful Tool for Accelerating Exploration of High-Energy-Density Rechargeable Lithium Batteries” Adv. Energy Mater. 2023, 13, 2301708.

34. J. Yang, X. Liang, H.-H. Ryu, C. S. Yoon,* Y.-K. Sun* “Ni-rich layered cathodes for lithium-ion batteries: From challenges to the future” Energy Storage Mater. 2023, 63, 102969.

33. H.-H. Ryu, H.-W. Lim, S. G. Lee, Y.-K. Sun* “Optimization of molybdenum-doped Ni-rich layered cathodes for long-term cycling” Energy Storage Mater. 2023, 59, 102771.

32. H.-H. Ryu, H.-W. Lim, G.-C. Kang, N.-Y. Park, Y.-K. Sun* “Long-Lasting NCMA Cathodes via Simultaneous Microstructural Refinement and Surface Modification” ACS Energy Lett. 2023, 8, 1354–1361. Highly Cited Papers

31. H.-H. Ryu, S.-B. Lee, C. S. Yoon*, Y.-K. Sun* “Morphology-Dependent Battery Performance of Ni-Rich Layered Cathodes: Single-Crystal versus Refined Polycrystal” ACS Energy Lett. 2022, 7, 3072–3079.

30. G.-M. Han, Y.-S. Kim, H.-H. Ryu, Y.-K. Sun*, C. S. Yoon* “Structural Stability of Single-Crystalline Ni-Rich Layered Cathode upon Delithiation” ACS Energy Lett. 2022, 7, 2919–2926.

29. L. W. Tian, J. W. Kim, S.-B. Hong, H.-H. Ryu, U.-H. Kim, Y.-K. Sun*, D.-W. Kim* “All-solid-state lithium batteries featuring hybrid electrolytes based on Li+ ion-conductive Li7La3Zr2O12 framework and full-concentration gradient Ni-rich NCM cathode” Chem. Eng. J. 2022, 450, 138043.

28. H.-H. Ryu, S.-B. Lee, Y.-K. Sun* “Promoting grain growth in Ni-rich single-crystal cathodes for high-performance lithium-ion batteries through Ce doping” J. Solid State Electrochem. 2022, 26, 2097–2105.

27.  H.-H. Ryu, G.-C. Kang, R. Ismoyojati, G.-T. Park, F. Maglia, Y.-K. Sun* “Intrinsic weaknesses of Co-free Ni–Mn layered cathodes for electric vehicles” Mater. Today 2022, 56, 8–15.

26. G.-Ta. Park, H.-H. Ryu, T.-C. Noh, G.-C. Kang, Y.-K. Sun* “Microstructure-optimized concentration-gradient NCM cathode for long-life Li-ion batteries” Mater. Today 2022, 52, 9–18.

25. X. Liang, T.-Y. Yu, H.-H. Ryu, Y.-K. Sun* “Hierarchical O3/P2 heterostructured cathode materials for advanced sodium-ion batteries” Energy Storage Mater. 2022, 47, 515–525. Highly Cited Papers

24. N.-Y. Park, H.-H. Ryu, L.-Y. Kuo, P. Kaghazchi, C. S. Yoon*, Y.-K. Sun* “High-Energy Cathodes via Precision Microstructure Tailoring for Next-Generation Electric Vehicles” ACS Energy Lett. 2021, 6, 4195–4202.

23. G.-T. Park, N.-Y. Park, T.-C. Noh, B. Namkoong, H.-H. Ryu, J.-Y. Shin, T. Beierling, C. S. Yoon, Y.-K. Sun* "High-performance Ni-rich Li[Ni0.9-xCo0.1Alx]O2 cathodes via multi-stage microstructural tailoring from hydroxide precursor to the lithiated oxide" Energy Environ. Sci. 2021, 14, 5084–5095.

22.  H.-H. Ryu, B. Namkoong, J.-H. Kim, I. Belharouak, C. S. Yoon*, Y.-K. Sun* “Capacity Fading Mechanisms in Ni-Rich Single-Crystal NCM Cathodes” ACS Energy Lett. 2021, 6, 2726–2734. Highly Cited Papers

21.  H.-H. Ryu, G. Han, T.-Y. Yu, Y.-K. Sun* “Enhanced Cycling Stability of O3-Type Na[Ni0.5Mn0.5]O2 Cathode through Sn Addition for Sodium-Ion Batteries” J. Phys. Chem. C 2021, 125, 6593–6600.

20. N.-Y. Park, H.-H. Ryu, G.-T. Park, T.-C. Noh, Y.-K. Sun* “Optimized Ni-Rich NCMA Cathode for Electric Vehicle Batteries” Adv. Energy Mater. 2021, 11, 2003767.

19. H.-H. Ryu, H. H. Sun, S.-T. Myung, C. S. Yoon, Y.-K. Sun* “Reducing cobalt from lithium-ion batteries for the electric vehicle era” Energy Environ. Sci. 2021, 14, 844–852. Highly Cited Papers

18. H.-H. Ryu, N.-Y. Park, T.-C. Noh, G.-C. Kang, F. Maglia, S.-J. Kim, C. S. Yoon*, Y.-K. Sun* “Microstrain Alleviation in High-Energy Ni-Rich NCMA Cathode for Long Battery Life” ACS Energy Lett. 2021, 6, 216–223.

17. T.-Y. Yu, H.-H. Ryu, G. Han, Y.-K. Sun* “Understanding the Capacity Fading Mechanisms of O3-Type Na[Ni0.5Mn0.5]O2 Cathode for Sodium-Ion Batteries” Adv. Energy Mater. 2020, 10, 2001609.

16. H.-H. Ryu, N.-Y. Park, D. R. Yoon, U.-H. Kim, C. S. Yoon*, Y.-K. Sun* “New Class of Ni-Rich Cathode Materials Li[NixCoyB1−x−y]O2 for Next Lithium Batteries” Adv. Energy Mater. 2020, 10, 2000495.

15. H.-H. Ryu, N.-Y. Park, J. H. Seo, Y.-S. Yu, M. Sharma, R. Mücke, P. Kaghazchi*, C. S. Yoon*, Y.-K. Sun* “A highly stabilized Ni-rich NCA cathode for high-energy lithium-ion batteries” Mater. Today 2020, 36, 73–82.

14. H. H. Sun, H.-H. Ryu, U.-H. Kim, J. A. Weeks, A. Heller, Y.-K. Sun*, C. B. Mullins* “Beyond Doping and Coating: Prospective Strategies for Stable High-Capacity Layered Ni-Rich Cathodes” ACS Energy Lett. 2020, 5, 1136–1146. Highly Cited Papers

13. G.-T. Park, H.-H. Ryu, N.-Y. Park, C. S. Yoon*, Y.-K. Sun* “Tungsten doping for stabilization of Li[Ni0.90Co0.05Mn0.05]O2 cathode for Li-ion battery at high voltage” J. Power Sources 2019, 442, 227242.

12. H.-H. Ryu, K.-J. Park, D. R. Yoon, A. Aishova, C. S. Yoon*, Y.-K. Sun* “Li[Ni0.9Co0.09W0.01]O2: A New Type of Layered Oxide Cathode with High Cycling Stability” Adv. Energy Mater. 2019, 9, 1902698.

11. J.-H. Kim, H.-H. Ryu, S. J. Kim, C. S. Yoon*, Y.-K. Sun* “Degradation Mechanism of Highly Ni-Rich Li[NixCoyMn1-x-y]O2 Cathodes with x > 0.9” ACS Appl. Mater. Interfaces 2019, 11, 30936–30942.

10. K.-J. Park, J.-Y. Hwang, H.-H. Ryu, F. Maglia, S.-J. Kim, P. Lamp, C. S. Yoon*, Y.-K. Sun* “Degradation Mechanism of Ni-Enriched NCA Cathode for Lithium Batteries: Are Microcracks Really Critical?” ACS Energy Lett. 2019, 4, 1394–1400. Highly Cited Papers

9.  U.-H. Kim, H.-H. Ryu, J.-H. Kim, R. Mücke, P. Kaghazchi, C. S. Yoon*, Y.-K. Sun* “Microstructure-Controlled Ni-Rich Cathode Material by Microscale Compositional Partition for Next-Generation Electric Vehicles”, Adv. Energy Mater. 2019, 9, 1803902.

8. U.-H. Kim, J.-H. Kim, J.-Y. Hwang, H.-H. Ryu, C. S. Yoon*, Y.-K. Sun* “Compositionally and structurally redesigned high-energy Ni-rich layered cathode for next-generation lithium batteries” Mater. Today 2019, 23, 26–36.

7.  H.-H. Ryu, G.-T. Park, C. S. Yoon*, Y.-K. Sun* “Suppressing detrimental phase transitions via tungsten doping of LiNiO2 cathode for next-generation lithium-ion batteries”, J. Mater. Chem. A 2019, 7, 18580–18588.

6.  H.-H. Ryu, G.-T. Park, C. S. Yoon, Y.-K. Sun* “Microstructural Degradation of Ni-Rich Li[NixCoyMn1−x−y]O2 Cathodes During Accelerated Calendar Aging” Small 2018, 14, 1803179.

5.  C. S. Yoon, S. J. Kim, U.-H. Kim, K.-J. Park, H.-H. Ryu, H.-S. Kim, Y.-K. Sun* “Microstructure Evolution of Concentration Gradient Li[Ni0.75Co0.10Mn0.15]O2 Cathode for Lithium-Ion Batteries”, Adv. Funct. Mater. 2018, 28, 1802090.

4.  E. Markevich, G. Salitra, Y. Talyosef, U.-H. Kim, H.-H. Ryu, Y.-K. Sun*, Doron Aurbach* “High-Performance LiNiO2 Cathodes with Practical Loading Cycled with Li metal Anodes in Fluoroethylene Carbonate-Based Electrolyte Solution”, ACS Appl. Energy Mater. 2018, 1, 2600–2607.

3.  H.-H. Ryu, K.-J. Park, C. S. Yoon*, Y.-K. Sun* “Capacity fading of Ni-rich Li[NixCoyMn1-x-y]O2 (0.6 ≤ x ≤ 0.95) Cathodes for High-Energy-Density Lithium-Ion Batteries: Bulk or Surface Degradation?”, Chem. Mater. 2018, 30, 1155–1163. Highly Cited Papers

2.  C. S. Yoon, H.-H. Ryu, G.-T. Park, J.-H. Kim, K.-H. Kim, Y.-K. Sun* “Extracting maximum capacity from Ni-rich Li[Ni0.95Co0.025Mn0.025]O2 cathodes for high-energy-density lithium-ion batteries”, J. Mater. Chem. A 2018, 6, 4126–4132.

1.    C. S. Yoon, K.-J. Park, U.-H. Kim, K. H. Kang, H.-H. Ryu, Y.-K. Sun* “High-Energy Ni-Rich Li[NixCoyMn1-x-y]O2 Cathodes via Compositional Partitioning for Next-Generation Electric Vehicles” Chem. Mater. 2017, 29, 10436–10445.