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Title: Modifying the Surface of a High-Voltage Lithium-Ion Cathode

Abstract

Ni-rich lithium nickel manganese cobalt oxides (LiNi xMn yCo 1–x–yO 2, NMCs) suffer from poor cycling stability at potentials above 4.2 V vs Li/Li +. This degraded cyclability at high potentials has been largely ascribed to the parasitic reactions between the delithiated cathode and the nonaqueous electrolyte. In this study, we mitigated the performance degradation of high-voltage NMC 622 by designing a functional interfacial layer that consists of a surface doping by Ti 4+ and a TiO 2 coating at the same time. The doping of Ti 4+ near the surface of NMC can suppress the irreversible phase transformation, while the TiO 2 coating can kinetically reduce the rate of the electron-transfer reaction between the delithiated cathode and the solvent. Furthermore, it is revealed that this interfacial engineering approach significantly enhanced both the cycling stability and the rate performance of NMC 622.

Authors:
 [1];  [1];  [2];  [3];  [1];  [1]; ORCiD logo [4];  [5];  [5];  [5]; ORCiD logo [6]; ORCiD logo [1]
  1. Argonne National Lab. (ANL), Lemont, IL (United States)
  2. Univ. of North Carolina, Chapel Hill, NC (United States)
  3. Ecole Polytechnique Federale de Lausanne, Vaud (Switzerland)
  4. Univ. of Arkansas, Fayetteville, AR (United States)
  5. BMW Group, Munich, Germany 80788
  6. Argonne National Lab. (ANL), Lemont, IL (United States); Imam Abdulrahman Bin Faisal Univ., Dammam (Saudi Arabia)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
OSTI Identifier:
1491025
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
ACS Applied Energy Materials
Additional Journal Information:
Journal Volume: 1; Journal Issue: 5; Journal ID: ISSN 2574-0962
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; Dual-functional coating; High voltage; Lithium ion batteries; Nickel-rich NMC; TiO2; high-voltage cathode; lithium-ion batteries; Ti4+ doping; TiO2 coating

Citation Formats

Gao, Han, Zeng, Xiaoqiao, Hu, Yixin, Tileli, Vasiliki, Li, Luxi, Ren, Yang, Meng, Xiangbo, Maglia, Filippo, Lamp, Peter, Kim, Sung-Jin, Amine, Khalil, and Chen, Zonghai. Modifying the Surface of a High-Voltage Lithium-Ion Cathode. United States: N. p., 2018. Web. doi:10.1021/acsaem.8b00323.
Gao, Han, Zeng, Xiaoqiao, Hu, Yixin, Tileli, Vasiliki, Li, Luxi, Ren, Yang, Meng, Xiangbo, Maglia, Filippo, Lamp, Peter, Kim, Sung-Jin, Amine, Khalil, & Chen, Zonghai. Modifying the Surface of a High-Voltage Lithium-Ion Cathode. United States. doi:10.1021/acsaem.8b00323.
Gao, Han, Zeng, Xiaoqiao, Hu, Yixin, Tileli, Vasiliki, Li, Luxi, Ren, Yang, Meng, Xiangbo, Maglia, Filippo, Lamp, Peter, Kim, Sung-Jin, Amine, Khalil, and Chen, Zonghai. Thu . "Modifying the Surface of a High-Voltage Lithium-Ion Cathode". United States. doi:10.1021/acsaem.8b00323. https://www.osti.gov/servlets/purl/1491025.
@article{osti_1491025,
title = {Modifying the Surface of a High-Voltage Lithium-Ion Cathode},
author = {Gao, Han and Zeng, Xiaoqiao and Hu, Yixin and Tileli, Vasiliki and Li, Luxi and Ren, Yang and Meng, Xiangbo and Maglia, Filippo and Lamp, Peter and Kim, Sung-Jin and Amine, Khalil and Chen, Zonghai},
abstractNote = {Ni-rich lithium nickel manganese cobalt oxides (LiNixMnyCo1–x–yO2, NMCs) suffer from poor cycling stability at potentials above 4.2 V vs Li/Li+. This degraded cyclability at high potentials has been largely ascribed to the parasitic reactions between the delithiated cathode and the nonaqueous electrolyte. In this study, we mitigated the performance degradation of high-voltage NMC 622 by designing a functional interfacial layer that consists of a surface doping by Ti4+ and a TiO2 coating at the same time. The doping of Ti4+ near the surface of NMC can suppress the irreversible phase transformation, while the TiO2 coating can kinetically reduce the rate of the electron-transfer reaction between the delithiated cathode and the solvent. Furthermore, it is revealed that this interfacial engineering approach significantly enhanced both the cycling stability and the rate performance of NMC 622.},
doi = {10.1021/acsaem.8b00323},
journal = {ACS Applied Energy Materials},
number = 5,
volume = 1,
place = {United States},
year = {2018},
month = {5}
}

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