Surface chemistry of LiNi0.5Mn1.5O4 particles coated by Al2O3 using atomic layer deposition for lithium-ion batteries

Kim, Jin Wook; Kim, Dong Hyeon; Oh, Dae Yang; Lee, Hyeyoun; Kim, Ji Hyun; Lee, Jae Hyun; Jung, Yoon Seok

doi:10.1016/j.jpowsour.2014.10.207

Cited by 207 publications

(119 citation statements)

References 45 publications

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“…[3][4][5] The coating of surface protective layers on pristine LMNO particles has been extensively studied in literature. [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] These layers provide a shield from the HF, and prevent rapid capacity fade, leading to improved cycling performance and capacity retention. Of the different surface coating techniques, atomic layer deposition (ALD) has inherent advantages that provide conformal, pin-hole free, size-tunable ultrathin films 21 and, thus, provide high capacity retention and a long life cycle.…”

mentioning

confidence: 99%

Ultrathin Conductive CeO₂Coating for Significant Improvement in Electrochemical Performance of LiMn_1.5Ni_0.5O₄Cathode Materials

Patel

Palaparty

Liu

2016

J. Electrochem. Soc.

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LiMn 1.5 Ni 0.5 O 4 (LMNO) has a huge potential for use as a cathode material in electric vehicular applications. However, it could face discharge capacity degradation with cycling at elevated temperatures due to attacks by hydrofluoric acid (HF) from the electrolyte, which could cause cationic dissolution. To overcome this barrier, we coated 3-5 micron sized LMNO particles with a ∼3 nm optimally thick and conductive CeO 2 film prepared by atomic layer deposition (ALD). This provided optimal thickness for mass transfer resistance, species protection, and mitigation of cationic dissolution at elevated temperatures. After 1,000 cycles of chargedischarge between 3.5 V-5 V (vs. Li + /Li) at 55 • C, the optimally coated sample, 50Ce (50 cycles of CeO 2 ALD coated) had a capacity retention of ∼97.4%, when tested at a 1C rate, and a capacity retention of ∼83% at a 2C rate. This was compared to uncoated LMNO particles that had a capacity retention of only ∼82.7% at a 1C rate, and a capacity retention of ∼40.8% at a 2C rate. Lithium ion batteries have emerged as potential candidates for replacement of Ni-Cd batteries in electric vehicles because of their high intrinsic energy densities combined with their ease of portability. This potential creates a need for the development of new or modified cathode and anode materials that possess high energy density, long cycle life, excellent capacity retention, and a large voltage window for operation. For electric vehicles, in particular, the upper voltage cutoff window on the cathode side should be ∼5 V vs. Li + /Li. Lithium manganese nickel oxide LiMn 1.5 Ni 0.5 O 4 (LMNO) has emerged in the research community as a potential cathode material for use in electric vehicles due to its large theoretical capacity of ∼148 mAhg −1 , a high working voltage of ∼4.7 V vs. Li + /Li, and a high energy density. 1,2However, LMNO suffers from high capacity fade during performance at elevated temperatures because Mn dissolves due to generation of hydrofluoric acid (HF) in the electrolyte. 3-5The coating of surface protective layers on pristine LMNO particles has been extensively studied in literature. [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] These layers provide a shield from the HF, and prevent rapid capacity fade, leading to improved cycling performance and capacity retention. Of the different surface coating techniques, atomic layer deposition (ALD) has inherent advantages that provide conformal, pin-hole free, size-tunable ultrathin films 21 and, thus, provide high capacity retention and a long life cycle. The ALD process involves a sequence of self-limiting reactions that result in a coating of one monolayer at a time. This enables size tunability at the sub-nanometer level and promotes conformity in the films. Materials like Al 2 O 3 , 17 MgF 2 , 22 TiO 2 , 18 and LiAlO 2 10 have been studied as coating materials prepared by ALD on LMNO. Even though, these materials have provided effective mitigation of cationic dissolution, the ionic conductivity of such protective layers ...

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mentioning

confidence: 99%

Ultrathin Conductive CeO₂Coating for Significant Improvement in Electrochemical Performance of LiMn_1.5Ni_0.5O₄Cathode Materials

Patel

Palaparty

Liu

2016

J. Electrochem. Soc.

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“…[40] The obvious differences between the coated and uncoated electrodes seen in the XAS measurements implies that the increased impedance comes from surface reactions of the LiNi 0.5 Mn 1.5 O 4 , and that the ultrathin layer of Al 2 O 3 on electrode surfaces can effectively suppress this phenomenon to a large extent. We note here that there should be an optimized thickness of the coating layer especially when the coating material is an insulator such as Al 2 O 3 .…”

Section: +mentioning

confidence: 99%

Atomic Insights into the Enhanced Surface Stability in High Voltage Cathode Materials by Ultrathin Coating

Fang

Lin

Nordlund

et al. 2017

Adv Funct Materials

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Surface properties of electrode materials play a critical role in the function of batteries. and improves the battery performance by decelerating the impedance buildup from the surface passivation. This study provides insightful information with characterizations of complementary scales at both the electrode level and particle level, and sheds light on the design of future coating processes and materials.

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“…For instance, Kim et al [48] presented that LiNi0.5Mn1.5O4 (LNMO) particles were successfully coated with ultrathin (<1 nm) Al2O3 by atomic layer deposition (ALD). The Al2O3 ALD coated LNMO showed signally improved electrochemical performance at 30°C.…”

Section: Al2o3mentioning

confidence: 99%

Aluminum-based materials for advanced battery systems

Qiu

Zhao

et al. 2017

Sci. China Mater.

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There has been increasing interest in developing micro/nanostructured aluminum-based materials for sustainable, dependable and high-efficiency electrochemical energy storage. This review chiefly discusses the aluminum-based electrode materials mainly including Al2O3, AlF3, AlPO4, Al(OH)3, as well as the composites (carbons, silicons, metals and transition metal oxides) for lithium-ion batteries, the development of aluminum-ion batteries, and nickel-metal hydride alkaline secondary batteries, which summarizes the methodologies, related charge-storage mechanisms, the relationship between nanostructures and electrochemical properties found in recent years, latest research achievements and their potential applications. In addition, we raise the relevant challenges in recently developed electrode materials and put forward new ideas for further development of micro/nanostructured aluminum-based materials in advanced battery systems.

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Surface chemistry of LiNi0.5Mn1.5O4 particles coated by Al2O3 using atomic layer deposition for lithium-ion batteries

Cited by 207 publications

References 45 publications

Ultrathin Conductive CeO₂Coating for Significant Improvement in Electrochemical Performance of LiMn_1.5Ni_0.5O₄Cathode Materials

Ultrathin Conductive CeO₂Coating for Significant Improvement in Electrochemical Performance of LiMn_1.5Ni_0.5O₄Cathode Materials

Atomic Insights into the Enhanced Surface Stability in High Voltage Cathode Materials by Ultrathin Coating

Aluminum-based materials for advanced battery systems

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Surface chemistry of LiNi0.5Mn1.5O4 particles coated by Al2O3 using atomic layer deposition for lithium-ion batteries

Cited by 207 publications

References 45 publications

Ultrathin Conductive CeO2Coating for Significant Improvement in Electrochemical Performance of LiMn1.5Ni0.5O4Cathode Materials

Ultrathin Conductive CeO2Coating for Significant Improvement in Electrochemical Performance of LiMn1.5Ni0.5O4Cathode Materials

Atomic Insights into the Enhanced Surface Stability in High Voltage Cathode Materials by Ultrathin Coating

Aluminum-based materials for advanced battery systems

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Product

Resources

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Ultrathin Conductive CeO₂Coating for Significant Improvement in Electrochemical Performance of LiMn_1.5Ni_0.5O₄Cathode Materials

Ultrathin Conductive CeO₂Coating for Significant Improvement in Electrochemical Performance of LiMn_1.5Ni_0.5O₄Cathode Materials