Cooling Induced Surface Reconstruction during Synthesis of High-Ni Layered Oxides

Zhang, Ming‐Jian; Hu, Xiaobing; Li, Maofan; Duan, Yandong; Yang, Luyi; Yin, Chong; Ge, Mingyuan; Xiao, Xianghui; Lee, Wah‐Keat; Ko, Jun Young Peter; Amine, Khalil; Chen, Zonghai; Zhu, Yimei; Dooryhee, Eric; Bai, Jianming; Pan, Feng; Wang, Feng

doi:10.1002/aenm.201901915

Title: Cooling Induced Surface Reconstruction during Synthesis of High-Ni Layered Oxides

Journal Article · 14 October 2019 · Advanced Energy Materials

DOI: https://doi.org/10.1002/aenm.201901915 · OSTI ID:1574924

^[1]; Hu, Xiaobing ^[2]; Li, Maofan ^[3]; Duan, Yandong ^[4]; Yang, Luyi ^[3]; Yin, Chong ^[5]; Ge, Mingyuan ^[6]; Xiao, Xianghui ^[6]; Lee, Wah‐Keat ^[6]; Ko, Jun Young Peter ^[7]; Amine, Khalil ^[8]; Chen, Zonghai ^[9]; Zhu, Yimei ^[2]; Dooryhee, Eric ^[6]; Bai, Jianming ^[6];

^[3]; Wang, Feng ^[10]

Peking Univ., Beijing (China); Brookhaven National Lab. (BNL), Upton, NY (United States). Sustainable Energy Technologies Dept.
Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
Peking Univ., Beijing (China)
Peking Univ., Beijing (China); Brookhaven National Lab. (BNL), Upton, NY (United States). Sustainable Energy Technologies Dept.; Hebei Univ. of Technology, Tianjing (China)
Brookhaven National Lab. (BNL), Upton, NY (United States); Chinese Academy of Sciences (CAS), Ningbo (China). Ningbo Inst. of Materials Technology and Engineering
Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source
Cornell Univ., Ithaca, NY (United States). Cornell High Energy Synchrotron Source
Argonne National Lab. (ANL), Argonne, IL (United States). Chemical Sciences and Engineering Division; Stanford Univ., CA (United States). Materials Science and Engineering; Imam Abdulrahman Bin Faisal Univ. (IAU), Dammam (Saudi Arabia)
Argonne National Lab. (ANL), Argonne, IL (United States). Chemical Sciences and Engineering Division
Brookhaven National Lab. (BNL), Upton, NY (United States). Sustainable Energy Technologies Dept.

Transition metal layered oxides have been the dominant cathodes in lithium-ion batteries, and among them, high-Ni ones (LiNi_xMn_yCo_zO₂; x ≥ 0.7) with greatly boosted capacity and reduced cost are of particular interest for large-scale applications. The high Ni loading, on the other hand, raises the concern of surface instability and poor rate performance. The rational design of synthesis leading to layered LiNi_0.7Mn_0.15Co_0.15O₂ with greatly enhanced rate capability is reflected, by implementing a quenching process alternative to the general slow cooling. In situ synchrotron X-ray diffraction, coupled with surface analysis, is applied to studies of the synthesis process, revealing cooling-induced surface reconstruction involving Li₂CO₃ accumulation, formation of a Li-deficient layer and Ni reduction at the particle surface. The reconstruction process happens predominantly at high temperatures (above 350 °C) and is highly cooling-rate dependent, implying that surface reconstruction can be suppressed through synthetic control, i.e., quenching to improve the surface stability and rate performance of the synthesized materials. These findings may provide guidance to rational synthesis of high-Ni cathode materials.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Sustainable Transportation Office. Vehicle Technologies Office (VTO); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; USDOE Office of Science (SC), Basic Energy Sciences (BES); Brookhaven National Laboratory (BNL); South University of Science and Technology of China (SUSTC)

Grant/Contract Number:: SC0012704; AC02‐06CH11357; AC02-06CH11357

OSTI ID:: 1574924

Alternate ID(s):: OSTI ID: 1570394; OSTI ID: 1763743

Report Number(s):: BNL-212356-2019-JAAM; BNL-212443-2019-JAAM; TRN: US2001072

Journal Information:: Advanced Energy Materials, Vol. 9, Issue 43; ISSN 1614-6832

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 34 works

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