36. Ji Hyun Um,† Seong-Jun Kim,† Jae-Hwan Hyun, Mihyun Kim, Si-Hwan Lee, Seung-Ho Yu, “Real-time visualizing nucleation and growth of electrodes for post-lithium-ion batteries”, Acc. Chem. Res. 2023, 56, 440. †These authors are equally contributed. Supplementary Cover

35. Jae-Hwan Hyun, Min-Jeong Yi, Hyejin Jung, Si-Hwan Lee, Ji Hyun Um, Seung-Ho Yu, “Electrochemical behavior and morphological evolution of Li metal anode under high cycling capacity”, Energy Storage Mater. 2023, 54, 146.

34. Ji Hyun Um,† Aihua Jin,† Xin Huang, Jeesoo Seok, Seong Soo Park, Janghyuk Moon, Mihyun Kim, So Hee Kim, Hyun Sik Kim, Sung-Pyo Cho, Héctor D. Abruña, Seung-Ho Yu, “Competitive nucleation and growth behavior in Li-Se batteries”, Energy Environ. Sci. 2022, 15, 1493. †These authors are equally contributed. Inside Front Cover

33. Juhyung Choi, Aihua Jin, Hyun Dong Jung, Dongjin Ko, Ji Hyun Um, Yoon Jeong Choi, So Hee Kim, Seoin Back, Seung-Ho Yu, Yuanzhe Piao, “Nitrogen and sulfur co-doped graphene nanoribbons with well-ordered stepped edges for high-performance potassium-ion battery anodes”, Energy Storage Mater. 2022 48 325.

32. Yunseo Jeoun, Min-Seob Kim, Si-Hwan Lee, Ji Hyun Um, Yung-Eun Sung, Seung-Ho Yu, “Lean-electrolyte lithium-sulfur batteries: recent advances in the design of cell components”, J. Chem. Eng. 2022 450 138209.

31. Jeesoo Seok, Jae-Hwan Hyun, Aihua Jin, Ji Hyun Um, Héctor D. Abruña, Seung-Ho Yu, “Visualization of sodium metal anode via operando X-ray and optical microscopy: controlling the morphological evolution of sodium metal plating”, ACS Appl. Mater. Interfaces 2022, 14, 10438.

30. Aihua Jin, Sue In Chae, Jae-Hyuk Park, Shin-Yeong Kim, Sanghwa Lee, Hogeun Chang, Jeong Hyun Kim, Ji Hyun Um, Seung-Ho Yu, Taeghwan Hyeon, Yung-Eun Sung, “SnSe nanocrystals decorated on carbon nanotubes for high-performance lithium-ion battery anodes”, J. Alloys Compd. 2021, 892, 162057.

29. Ji Hyun Um, Seung-Ho Yu, “Unraveling the mechanisms of lithium metal plating/stripping via in-situ/operando analytical techniques”, Adv. Energy Mater. 2021, 11, 2003004. Front Cover

28. Ji Hyun Um,† Kookhan Kim,† Jungjin Park,† Yung-Eun Sung, Seung-Ho Yu, “Revisiting the strategies for stabilizing lithium metal anodes”, J. Mater. Chem. A 2020, 8, 13874. †These authors are equally contributed.

27. Aihua Jin, Narae Kang, Ji Hyun Um, In-Hwan Ko, Min-Seob Kim, Kookhan Kim, So Hee Kim, Seung-Ho Yu, Yung-Eun Sung, “Sn(salen)-derived SnS nanoparticles embedded in N-doped carbon for high performance lithium-ion battery anodes”, Chem. Commun. 2020, 56, 8095.

26. Hyunwoo Kim, Woosung Choi, Jaesang Yoon, Ji Hyun Um, Wontae Lee, Jaeyoung Kim, Jordi Cabana, Won-Sub Yoon, “Exploring anomalous charge storage in anode materials for next-generation Li rechargeable batteries”, Chem. Rev. 2020, 120, 6934.

25. Hyunchul Kim, Hyunwoo Kim, Shoaib Muhammad, Ji Hyun Um, Md Selim Arif Sher Shah, Pil J. Yoo, Won-Sub Yoon, “Catalytic effect of reduced graphene oxide on facilitating reversible conversion reaction in SnO2 for next-generation Li rechargeable batteries”, J. Power Sources 2020, 446, 227321.

24. Yunok Kim,† Ji Hyun Um,† Hyunjoon Lee, Woosung Choi, Woon Ih Choi, Hyo Sug Lee, Ok-Hee Kim, Ji Man Kim, Yong-Hun Cho, Won-Sub Yoon, “Additional lithium storage on dynamic electrode surface by charge redistribution in inactive Ru metal”, Small 2020, 16, 1905868. †These authors are equally contributed.

23. Ji Hyun Um, Hyunwoo Kim, Yong-Hun Cho, Won-Sub Yoon, “SnO2-coated 3D etched Cu foam for lithium-ion battery anode”, J. Electrochem. Sci. Technol. 2020, 11, 92.

22. Ji Hyun Um,† Kowsalya Palanisamy,† Mihee Jeong,† Hyunchul Kim, Won-Sub Yoon, “Phase dynamics on conversion-reaction-based tin-doped ferrite anode for next-generation lithium batteries”, ACS Nano 2019, 13, 5674. †These authors are equally contributed.

21. Ji Hyun Um,† Joohyun Lim,† Katharina Hengge, Christina Scheu, Won-Sub Yoon, Jin-Kyu Lee, Yung-Eun Sung, “Pore-interconnected hollow (Sn,Ti)O2 solid-solution nanoparticles for lithium-ion battery anode materials”, Compos. B Eng. 2019, 166, 613. †These authors are equally contributed.

20. Hyunchul Kim, Dong-Seok Yang, Ji Hyun Um, Mahalingam Balasubramanian, Jaeseung Yoo, Hyunwoo Kim, Su Bin Park, Ji Man Kim, Won-Sub Yoon, “Comparative study of bulk and nano-structured mesoporous SnO2 electrodes on the electrochemical performances for next generation Li rechargeable batteries”, J. Power Sources 2019, 413, 241.

19. Gigap Han, Ji Hyun Um, Hyeji Park, Kicheol Hong, Won-Sub Yoon, Heeman Choe, “Hierarchically structured nanoporous copper for use as lithium-ion battery anode”, Scr. Mater. 2019, 163, 9.

18. Ji Hyun Um, Chi-Yeong Ahn, Jinsoo Kim, Mihee Jeong, Yung-Eun Sung, Yong-Hun Cho, Seung-Soo Kim, Won-Sub Yoon, “From grass to battery anode: agricultural biomass hemp-derived carbon for lithium storage”, RSC Adv. 2018, 8, 32231.

17. Ji Hyun Um,† Yunok Kim,† Chi-Yeong Ahn, Jinsoo Kim, Yung-Eun Sung, Yong-Hun Cho, Seung-Soo Kim, Won-Sub Yoon, “Biomass waste, coffee grounds-derived carbon for lithium storage”, J. Electrochem. Sci. Technol. 2018, 9, 163. †These authors are equally contributed.

16. Yunok Kim, Dae Sik Kim, Ji Hyun Um, Jaesang Yoon, Ji Man Kim, Hansu Kim, Won-Sub Yoon, “Revisiting solid electrolyte interphase on the carbonaceous electrodes using soft X-ray absorption spectroscopy”, ACS Appl. Mater. Interfaces 2018, 10, 29992.

15. Rajendra C. Pawar,† Ji Hyun Um,† Suhee Kang, Won-Sub Yoon, Heeman Choe, Caroline S. Leea, “Solvent-polarity-induced hematite (α-Fe2O3) nanostructures for lithium-ion battery and photoelectrochemical applications”, Electrochim. Acta 2017, 245, 643. †These authors are equally contributed.

14. Hyelim Choi, Hyeji Park, Ji Hyun Um, Won-Sub Yoon, Heeman Choe, “Processing and characterization of titanium dioxide grown on titanium foam for potential use as Li-ion electrode”, Appl. Surf. Sci. 2017, 411, 363.

13. Hyeji Park, Hyelim Choi, Kyungju Nam, Sukyung Lee, Ji Hyun Um, Kyungbae Kim, Jae-Hun Kim, Won-Sub Yoon, Heeman Choe, “Anode design based on microscale porous scaffolds for advanced lithium ion batteries“, J. Electron. Mater. 2017, 46, 3789.

12. Hyeji Park, Ji Hyun Um, Hyelim Choi, Won-Sub Yoon, Yung-Eun Sung, Heeman Choe, “Hierarchical micro-lamella-structured 3D porous copper current collector coated with tin for advanced lithium-ion batteries“, Appl. Surf. Sci. 2017, 399, 132.

11. Kowsalya Palanisamy,† Ji Hyun Um,† Mihee Jeong, Won-Sub Yoon, “Porous V2O5/RGO/CNT hierarchical architecture as a cathode material: emphasis on the contribution of surface lithium storage”, Sci. Rep. 2016, 6, 31275. †These authors are equally contributed.

10. Joohyun Lim,† Ji Hyun Um,† Kyung Jae Lee, Seung-Ho Yu, Young-Jae Kim, Yung-Eun Sung, Jin-Kyu Lee, “Simple size control of TiO2 nanoparticles and their electrochemical performance: emphasizing the contribution of the surface area to lithium storage at high-rates”, Nanoscale 2016, 8, 5688. †These authors are equally contributed.

9. Ji Hyun Um, MyounggeunChoi, Hyeji Park, Yong-Hun Cho, David C. Dunand, Heeman Choe, Yung-Eun Sung, “3D macroporous electrode and high-performance in lithium-ion batteries using SnO2 coated on Cu foam”, Sci. Rep. 2016, 6, 18626.

8. Jaesang Yoon, Donghwi Kim, Ji Hyun Um, Mihee Jeong, Woong Oh, Won-Sub Yoon, “Effect of local structural changes on rate capability of LiNi0.5Mn1.5O4-δ cathode material for lithium ion batteries“, J. Alloys Compd. 2016, 686, 593.

7. Joohyun Lim,† Ji Hyun Um,† Jihoon Ahn, Seung-Ho Yu, Yung-Eun Sung, Jin-Kyu Lee, “Soft template strategy to synthesize iron oxide–titania yolk–shell nanoparticles as high-performance anode materials for lithium-ion battery applications”, Chem. Eur. J. 2015, 21, 7954. †These authors are equally contributed.

6. Ji Hyun Um, Seung-Ho Yu, Yong-Hun Cho, Yung-Eun Sung, “SnO2 nanotube arrays embedded in a carbon layer for high-performance lithium-ion battery applications”, New J. Chem. 2015, 39, 2541.

5. Joohyun Lim,† Ji Hyun Um,† Yun Ji Park, Yung-Eun Sung, Jin-Kyu Lee, “Simple size control of spherical titania nanoparticles with KCl“, Bull. Korean Chem. Soc. 2015, 36, 1258. †These authors are equally contributed.

4. Ji Hyun Um, Hyeji Park, Yong-Hun Cho, Matthew P. B. Glazer, David C. Dunand, Heeman Choe, Yung-Eun Sung, “3D interconnected SnO2-coated Cu foam as a high-performance anode for lithium-ion battery applications”, RSC Adv. 2014, 4, 58059.

3. Sun Ha Park, Yong-Hun Cho, Myounggeun Choi, Hyelim Choi, Jin Soo Kang, Ji Hyun Um, Jung-Woo Choi, Heeman Choe, Yung-Eun Sung, “Nickel-nitride-coated nickel foam as a counter electrode for dye-sensitized solar cells”, Surf. Coat. Technol. 2014, 259, 560.

2. Hyungyung Jo, Yong-Hun Cho, Myounggeun Choi, Jinhan Cho, Ji Hyun Um, Yung-Eun Sung, Heeman Choe, “Novel method of powder-based processing of copper nanofoams for their potential use in energy applications“, Mater. Chem. Phys. 2014, 145, 6.

1. Yun Tae Kim, Ji Hyun Um, Sung Ho Kim, Tae-Hoon Lim, Ho-In Lee, “Effect of promoter on Ni/MgO catalyst in C8H18 autothermal reforming in solid oxide fuel cell system”, Appl. Catal. A Gen. 2010, 384, 10.

3. Won-Sub Yoon, Kowsalya Palanisamy, Ji Hyun Um, Mihee Jeong, "Nanocomposite containing tin ferrite", Korea Patent Grant #KR102040236 (2019-10-29).

2. Ji Hyun Um, Hyeji Park, Myounggeun Choi, Hyelim Choi, Yong-Hun Cho, Yung-Eun Sung, Heeman Choe, "Metal foam for electrode of secondary lithium battery, preparing method thereof, and secondary lithium battery including the metal foam", US Patent Grant #US10265773B2 (2019-04-23).

1. Ji Hyun Um, Yung-Eun Sung, Yong-Hun Cho, Hyelim Choi, Heeman Choe, "Metal foam for electrode of lithium secondary battery, preparing method thereof and lithium secondary battery including the metalfoam", Korea Patent Grant #KR101353262 (2014-01-14).