Improving the cycling and air-storage stability of LiNi0.8Co0.1Mn0.1O2 through integrated surface/interface/doping engineering

Zhai, Yanwu; Yang, Wenyun; Ning, De; Yang, Jinbo; Sun, L. Z.; Schuck, Götz; Schumacher, G.; Liu, Xiangfeng

doi:10.1039/c9ta13014d

Cited by 63 publications

(35 citation statements)

References 66 publications

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“…The curves contain one semicircle in the high‐frequency region representing the Li + diffusion through the CEI film ( R sf ), one semicircle in the high‐to‐medium‐frequency region is related to the charge‐transfer process ( R ct ), and a slope in the low‐frequency region representing Warburg impedance ( W ) resulting from the Li‐ion diffusion process [30,31] . The Li + diffusion coefficients ( D Li ) of the samples can be evaluated according to Equation (1) and [32]

true D_{Li} = R^{2} T^{2} / (2 A^{2} n^{4} F^{4} C^{2} σ_{normalw}^{2})

…”

Section: Resultsmentioning

confidence: 99%

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Enhanced Electrochemical and Structural Stability of Ni‐rich Cathode Material by Lithium Metaborate Coating for Lithium‐Ion Batteries

et al. 2022

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A facile mechanical mixing‐calcination method was employed to coat lithium metaborate onto LiNi0.88Co0.06Mn0.03Al0.03O2 cathode. Physical characterizations revealed that the coating layer was uniformly spread on the surface of the material particles, and did not alter the structure and morphology. Electrochemical measurements indicated that the surface‐modified cathode showed significantly improved cycling stability, both under room‐temperature and high‐temperature (50 °C). The coated sample delivered an initial discharge capacity of 211.0 mAh g−1 at 0.1 C, and a capacity retention of 87.5 % after 300 cycles at 1 C rate under room‐temperature. Meanwhile, it could maintain 97.2 % of initial capacity after 120 cycles at 1 C under 50 °C, which was much higher than the value of the pristine sample (only 37.2 %). The lithium‐ion diffusion kinetics was analyzed by electrochemical impedance spectroscopy. The coated material exhibits lower surface resistance and charge‐transfer resistance, as well as faster lithium‐ion diffusion than the pristine one. The materials were also characterized after cycling. The surface‐modified sample possessed more stable surficial and structural stability.

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true D_{Li} = R^{2} T^{2} / (2 A^{2} n^{4} F^{4} C^{2} σ_{normalw}^{2})

…”

Section: Resultsmentioning

confidence: 99%

“…[30,31] The Li + diffusion coefficients (D Li ) of the samples can be evaluated according to Equation ( 1) and ( 2). [32]…”

Section: Resultsmentioning

confidence: 99%

Enhanced Electrochemical and Structural Stability of Ni‐rich Cathode Material by Lithium Metaborate Coating for Lithium‐Ion Batteries

et al. 2022

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Section: Methods To Eliminate Residual Lithium Compoundsmentioning

confidence: 99%

“…Furthermore, Li 2 ZrO 3 coating layer inhibited the formation of electrochemical insulated surface RLCs and significantly improved the long‐term storage stability of the Ni‐rich cathode materials (Figure 7E). [ 77 ]…”

Section: Methods To Eliminate Residual Lithium Compoundsmentioning

confidence: 99%

Strategies of Removing Residual Lithium Compounds on the Surface of Ni‐Rich Cathode Materials^†

Chen

et al. 2020

Chin. J. Chem.

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Ni-rich cathode materials have become one of the most promising cathode materials for advanced high-energy Li-ion batteries (LIBs) owing to their high specific capacity. However, Ni-rich cathode materials are sensitive to the trace H2O and CO2 in the air, and tend to react with them to generate LiOH and Li2CO3 at the particle surface region (named residual lithium compounds, labeled as RLCs). The RLCs will deteriorate the comprehensive performances of Ni-rich cathode materials and make trouble in the subsequent manufacturing process of electrode, including causing low initial coulombic efficiency and poor storage property, bringing about potential safety hazards, and gelatinizing the electrode slurry. Therefore, it is of considerable significance to remove the RLCs. Researchers have done a lot of work on the corresponding field, such as exploring the formation mechanism and elimination methods. This paper investigates the origin of the surface residual lithium compounds on Ni-rich cathode materials, analyzes their adverse effects on the performance and the subsequent electrode production process, and summarizes various kinds of feasible methods for removing the RLCs. Finally, we propose a new research direction of eliminating the lithium residuals after comparing and summing up the above. We hope this work can provide a reference for alleviating the adverse effects of residual lithium compounds for Ni-rich cathode materials' industrial production. Yuefeng Su (left) is a professor in School of Materials Science and Engineering at Beijing Institute of Technology (BIT). In 2013, he was awarded New Century Excellent Talents in University from the Chinese Ministry of Education. His research group mainly engaged in green secondary batteries and advanced energy materials, including lithium-rich cathode materials, nickel-rich cathode materials, and other high-power energy storage devices. Linwei Li (middle) is currently a graduate student under the supervision of Prof. Yuefeng Su in School of Materials Science and Engineering at Beijing Institute of Technology. Her research focuses on the synthesis and performance improvement of Ni-rich cathode materials for lithium-ion batteries. Gang Chen (right) is currently a Ph.D. candidate under the supervision of Prof. Yuefeng Su in School of Materials Science and Engineering at Beijing Institute of Technology. His major research includes the design and synthesis of Ni-rich cathode materials for high-performance lithium-ion batteries, especially for the interfacial design and its mechanism research of Ni-rich materials.

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“…Fast‐ion conductors have been considered better coating materials because of their high ionic conductivity, which mainly contain LiF, Li 2 ZrO 3 , Li 2 SiO 3 , Li 2 SnO 3 , Li 2 TiO 3 , Li 3 VO 4 , and so on. [ 135‐141 ] Compared with metal oxides, phosphates, and fluorides, these coatings can improve the electron transfer between layered ternary oxide cathodes and accelerate the charge transfer process on the material surface. Xiao et al .…”

Section: Modification Methodsmentioning

confidence: 99%

High‐Voltage Layered Ternary Oxide Cathode Materials: Failure Mechanisms and Modification Methods^†

et al. 2020

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Due to the large reversible capacity, high operating voltage and low cost, layered ternary oxide cathode materials LiNixCoyAl1−x−yO2 (NCA) and LiNixCoyMn1−x−yO2 (NCM) are considered as the most potential candidate materials for lithium-ion batteries (LIBs) used in (hybrid) electric vehicles (EVs). However, next-generation long-range EVs require a high specific capacity (around 203 mAh•g-1 at 3.7V) at the cathode active material level, which is not provided with current commercially layered ternary oxide cathodes. Increasing the operating voltage is an effective method to improve the specific capacity of the cathode and the energy density of the battery, but the high operating voltage also causes a lot of problems, such as cation mixing and phase transformation, electrolyte decomposition, transition metal dissolution and microcracks. So far, researchers have carried out a lot of works to solve these issues. Surface coating, element doping and the design of electrolytes have been proved to be effective solutions. In this review, the failure mechanisms and modification methods of high-voltage layered ternary oxide cathode materials are summarized, which could provide valuable information to the research of high-voltage layered ternary oxide cathode materials in basic science and industrial production. Xiaodan Wang (top left) was born in Hebei province, China in 1996. She received her bachelor degree from Hebei University of Technology in 2018. She is currently studying for her master's degree under the guidance of Professor Bai in School of Materials Science at Beijing Institute of Technology. Ying Bai (top right) is currently a professor at Beijing Institute of Technology (BIT). Her research interests focus on electrochemical energy storage and conversion technology. Dr. Bai earned her bachelor degree from Applied Chemistry Division at Harbin Institute of Technology, China (HIT) in 1997. She completed her Ph.D. from School of Chemical Engineering & Materials Science at BIT in 2003. In 2013, she was awarded New Century Excellent Talents in University from the Chinese Ministry of Education. She hosted and is hosting the projects of the National Natural Science Foundation of China as a principal investigator. Dr. Bai has authored/co-authored more than 120 peer-reviewed articles and filed more than 40 Chinese patents. Xinran Wang (bottom left) is an associate researcher at Beijing Institute of Technology (BIT). His research interests focus on new system for high energy density secondary batteries. In 2016, he received his Ph.D. degree in University of Chinese Academy of Sciences. From 2013 to 2015, he was jointly trained by Georgia Institute of Technology in the United States. From 2016 to 2018, he worked as an assistant researcher at the Institute of Process Engineering, Chinese Academy of Sciences. He has won the Baosteel Award, the President's Award of the Chinese Academy of Sciences, the Chinese Academy of Sciences Outstanding pacesetter and so on. Chuan Wu (bottom right) is a professor at Beijing Institute of Tech...

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Improving the cycling and air-storage stability of LiNi_0.8Co_0.1Mn_0.1O₂ through integrated surface/interface/doping engineering

Abstract: Excellent cycling and air-storage stability of LiNi0.8Co0.1Mn0.1O2 are obtained through an integrated strategy with a Li2ZrO3 protective layer, Zr4+ doping and the rock-salt interface phase engineering from Li2ZrO3 coating.

Cited by 63 publications

References 66 publications

Enhanced Electrochemical and Structural Stability of Ni‐rich Cathode Material by Lithium Metaborate Coating for Lithium‐Ion Batteries

Enhanced Electrochemical and Structural Stability of Ni‐rich Cathode Material by Lithium Metaborate Coating for Lithium‐Ion Batteries

Strategies of Removing Residual Lithium Compounds on the Surface of Ni‐Rich Cathode Materials^†

High‐Voltage Layered Ternary Oxide Cathode Materials: Failure Mechanisms and Modification Methods^†

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Improving the cycling and air-storage stability of LiNi0.8Co0.1Mn0.1O2 through integrated surface/interface/doping engineering

Abstract: Excellent cycling and air-storage stability of LiNi0.8Co0.1Mn0.1O2 are obtained through an integrated strategy with a Li2ZrO3 protective layer, Zr4+ doping and the rock-salt interface phase engineering from Li2ZrO3 coating.

Cited by 63 publications

References 66 publications

Enhanced Electrochemical and Structural Stability of Ni‐rich Cathode Material by Lithium Metaborate Coating for Lithium‐Ion Batteries

Enhanced Electrochemical and Structural Stability of Ni‐rich Cathode Material by Lithium Metaborate Coating for Lithium‐Ion Batteries

Strategies of Removing Residual Lithium Compounds on the Surface of Ni‐Rich Cathode Materials†

High‐Voltage Layered Ternary Oxide Cathode Materials: Failure Mechanisms and Modification Methods†

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Product

Resources

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Improving the cycling and air-storage stability of LiNi_0.8Co_0.1Mn_0.1O₂ through integrated surface/interface/doping engineering

Strategies of Removing Residual Lithium Compounds on the Surface of Ni‐Rich Cathode Materials^†

High‐Voltage Layered Ternary Oxide Cathode Materials: Failure Mechanisms and Modification Methods^†