Enhanced electrochemical performance of Ni-rich cathode material by N-doped LiAlO2 surface modification for lithium-ion batteries

Li, Qingyu; Yang, Guangchang; Chu, Youqi; Tan, Chunlei; Pan, Qichang; Zheng, Fenghua; Liu, Yu; Hu, Sun; Huang, Youguo; Wang, Hongqiang

doi:10.1016/j.electacta.2021.137882

Cited by 24 publications

(13 citation statements)

References 62 publications

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“…11 Different coating materials including metal oxides, metal fluorides, metal phosphates, and metal hydroxides have been studied as coating materials by ALD. 11,21,23 However, these coatings frequently provide poor ionic and electronic conductivities, which can lead to capacity fading and increase cell polarization and resistance during cycling. 23 Introducing lithium-containing coating materials, with ideally a high Li-ion conductivity, can mitigate these issues.…”

Section: Introductionmentioning

confidence: 99%

“…23 Introducing lithium-containing coating materials, with ideally a high Li-ion conductivity, can mitigate these issues. 19 For example, Li 2 ZrO 3 , 24 LiAlO 2 , 21 and LiAlF 4 23 have been used as coatings on Ni-rich electrode materials. These have been reported to improve the long-term cyclability of electrodes.…”

Section: Introductionmentioning

confidence: 99%

“…A superior coating layer should be chemically stable, electron and ion conductive, and precisely uniform . Atomic layer deposition (ALD) is selected in this research for developing metal oxide and Li-containing metal oxide coatings to meet the aforementioned requirements. , ALD is a technique based on sequential self-terminating chemical reactions between a substrate surface and gaseous precursors. During the ALD synthesis, thin films (coatings) are deposited by injection of the precursors which react with the substrate surface to form a completely saturated surface.…”

Section: Introductionmentioning

confidence: 99%

“…As a surface-reaction-limited method, the ALD coating can result in covering all electrode material surfaces leading to fewer issues with the electrode interface and consequently improving battery performance . Different coating materials including metal oxides, metal fluorides, metal phosphates, and metal hydroxides have been studied as coating materials by ALD. ,, However, these coatings frequently provide poor ionic and electronic conductivities, which can lead to capacity fading and increase cell polarization and resistance during cycling . Introducing lithium-containing coating materials, with ideally a high Li-ion conductivity, can mitigate these issues .…”

Section: Introductionmentioning

confidence: 99%

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Understanding the Stabilizing Effects of Nanoscale Metal Oxide and Li–Metal Oxide Coatings on Lithium-Ion Battery Positive Electrode Materials

Ahaliabadeh

Miikkulainen

Mäntymäki

et al. 2021

ACS Appl. Mater. Interfaces

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Nickel-rich layered oxides, such as LiNi 0.6 Co 0.2 Mn 0.2 O 2 (NMC622), are high-capacity electrode materials for lithium-ion batteries. However, this material faces issues, such as poor durability at high cut-off voltages (>4.4 V vs Li/Li + ), which mainly originate from an unstable electrode−electrolyte interface. To reduce the side reactions at the interfacial zone and increase the structural stability of the NMC622 materials, nanoscale (<5 nm) coatings of TiO x (TO) and Li x Ti y O z (LTO) were deposited over NMC622 composite electrodes using atomic layer deposition. It was found that these coatings provided a protective surface and also reinforced the electrode structure. Under high-voltage range (3.0−4.6 V) cycling, the coatings enhance the NMC electrochemical behavior, enabling longer cycle life and higher capacity. Cyclic voltammetry, X-ray photoelectron spectroscopy, and X-ray diffraction analyses of the coated NMC electrodes suggest that the enhanced electrochemical performance originates from reduced side reactions. In situ dilatometry analysis shows reversible volume change for NMC-LTO during the cycling. It revealed that the dilation behavior of the electrode, resulting in crack formation and consequent particle degradation, is significantly suppressed for the coated sample. The ability of the coatings to mitigate the electrode degradation mechanisms, illustrated in this report, provides insight into a method to enhance the performance of Ni-rich positive electrode materials under high-voltage ranges.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Understanding the Stabilizing Effects of Nanoscale Metal Oxide and Li–Metal Oxide Coatings on Lithium-Ion Battery Positive Electrode Materials

Ahaliabadeh

Miikkulainen

Mäntymäki

et al. 2021

ACS Appl. Mater. Interfaces

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“…However, two coated samples show obvious change in the Ni 3+ /Ni 2+ ratio, which reveals strong chemical interactions between c-PAN and NCM811. In the Li 1s XPS spectrum (Figure j), the coated samples exhibit obvious blue-shifts compared to the pristine NCM811, which is ascribed to the decreased electron density around Li caused by the formation of Li–N bonding . This confirms the weakened Li–O bonding of the coated NCM811 surface.…”

Section: Materials Characterizationmentioning

confidence: 73%

Thermochemical Cyclization Constructs Bridged Dual-Coating of Ni-Rich Layered Oxide Cathodes for High-Energy Li-Ion Batteries

et al. 2022

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Enhancing microstructural and electrochemical stabilities of Ni-rich layered oxides is critical for improving the safety and cycle-life of high-energy Li-ion batteries. Here we propose a thermochemical cyclization strategy where heating polyacrylonitrile with LiNi 0.8 Co 0.1 Mn 0.1 O 2 can simultaneously construct a cyclized polyacrylonitrile outer layer and a rock-salt bridge-like inner layer, forming a compact dual-coating of LiNi 0.8 Co 0.1 Mn 0.1 O 2 . Systematic studies demonstrate that the mild cyclization reaction between polyacrylonitrile and LiNi 0.8 Co 0.1 Mn 0.1 O 2 induces a desirable "layered to rock-salt" structural transformation to create a nano-intermedium that acts as the bridge for binding cyclized polyacrylonitrile to layered LiNi 0.8 Co 0.1 Mn 0.1 O 2 . Because of the improvement of the structural and electrochemical stability and electrical properties, this cathode design remarkably enhances the cycling performance and rate capability of LiNi 0.8 Co 0.1 Mn 0.1 O 2 , showing a high reversible capacity of 183 mAh g −1 and a high capacity retention of 83% after 300 cycles at 1 C rate. Notably, this facile and scalable surface engineering makes Ni-rich cathodes potentially viable for commercialization in high-energy Li-ion batteries.

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Electrode Protection and Electrolyte Optimization via Surface Modification Strategy for High‐Performance Lithium Batteries

Zhang,

Wang,

Xue

2023

Adv Funct Materials

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Lithium batteries have become one of the best choices for energy storage due to their long lifespan, high operating voltage‐platform and energy density without any memory effect. However, the ever‐increased demands of high‐performance lithium batteries indeed place a stricter request to the electrodes and electrolytes materials, and electrode‐electrolyte interface. Various strategies are developed to enhance the overall performances of current lithium batteries, and among them, artificial modification of battery components is regarded as one of the most effective. However, systematic summery surrounding surface modifications is rare. In this review, the structural instability of the bare electrodes and the main defects of unmodified separator/solid electrolytes are briefly presented. Then diverse and advanced surface‐engineering strategies for both the cathode and anode materials, as well as the separator/solid electrolytes are carefully summarized. More importantly, the prospects of surface modification and challenges of current methods for constructing high‐performance lithium batteries are pointed out.

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Enhanced electrochemical performance of Ni-rich cathode material by N-doped LiAlO2 surface modification for lithium-ion batteries

Cited by 24 publications

References 62 publications

Understanding the Stabilizing Effects of Nanoscale Metal Oxide and Li–Metal Oxide Coatings on Lithium-Ion Battery Positive Electrode Materials

Understanding the Stabilizing Effects of Nanoscale Metal Oxide and Li–Metal Oxide Coatings on Lithium-Ion Battery Positive Electrode Materials

Thermochemical Cyclization Constructs Bridged Dual-Coating of Ni-Rich Layered Oxide Cathodes for High-Energy Li-Ion Batteries

Electrode Protection and Electrolyte Optimization via Surface Modification Strategy for High‐Performance Lithium Batteries

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