Solid-State Reaction Heterogeneity During Calcination of Lithium-Ion Battery Cathode

Sugeun Jo, Jeongwoo Han, Sungjae Seo, Oh Sung Kwon, Subin Choi, Jin Zhang, Hyejeong Hyun, Juhyun Oh, Juwon Kim, Jinkyu Chung, Hwiho Kim, Jian Wang, Junho Bae, Junyeob Moon, Yoon Cheol Park, Moon Hi Hong, Miyoung Kim, Yijin Liu, Il Sohn, Keeyoung JungJongwoo Lim

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


During solid-state calcination, with increasing temperature, materials undergo complex phase transitions with heterogeneous solid-state reactions and mass transport. Precise control of the calcination chemistry is therefore crucial for synthesizing state-of-the-art Ni-rich layered oxides (LiNi1-x-yCoxMnyO2, NRNCM) as cathode materials for lithium-ion batteries. Although the battery performance depends on the chemical heterogeneity during NRNCM calcination, it has not yet been elucidated. Herein, through synchrotron-based X-ray, mass spectrometry microscopy, and structural analyses, it is revealed that the temperature-dependent reaction kinetics, the diffusivity of solid-state lithium sources, and the ambient oxygen control the local chemical compositions of the reaction intermediates within a calcined particle. Additionally, it is found that the variations in the reducing power of the transition metals (i.e., Ni, Co, and Mn) determine the local structures at the nanoscale. The investigation of the reaction mechanism via imaging analysis provides valuable information for tuning the calcination chemistry and developing high-energy/power density lithium-ion batteries.

Original languageEnglish
Article number2207076
JournalAdvanced Materials
Issue number10
Publication statusPublished - 2023 Mar 9

Bibliographical note

Publisher Copyright:
© 2023 Wiley-VCH GmbH.

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


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