Enhancement of electrochemical performance in lithium-ion battery via tantalum oxide coated nickel-rich cathode materials

Chen, Fengling; Lin, Jin; Chen, Yifan; Dong, Binbin; Yin, Chujun; Tian, Siying; Sun, Dalin; Xie, Jing; Zhang, Zhenyu; Li, Hong; Li, Chaobo

doi:10.1088/1674-1056/ac4481

Cited by 4 publications

(5 citation statements)

References 48 publications

(56 reference statements)

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“…So far, there is only one study reporting a tantalum oxide coating by wet chemistry with post-annealing step at 550 °C for Ni-rich CAM. 49 However, reported crystallographic data of the coated product and similar results from other studies on Ta-doping 17 suggest at least partial incorporation of tantalum into the host structure of their material. To the best of our knowledge, our study is the first report on pure tantalum oxide coating on CAMs for liquid Li-ion batteries.…”

supporting

confidence: 72%

Tantalum Oxide Coating of Ni-rich Cathode Active Material via Atomic Layer Deposition and its Influence on Gas Evolution and Electrochemical Performance in the Early and Advanced Stages of Degradation

Dalkilic¹,

Schmidt²,

Schladt³

et al. 2022

J. Electrochem. Soc.

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Detrimental side-reactions of Ni-rich cathode active materials (CAMs) with the electrolyte have historically impeded the extension of the utilized voltage window to higher upper cut-off voltages. Doping and coating approaches are studied widely to further improve these materials and to reduce the intensity of bulk and surface degradation but suffer from poor control of film thickness and homogeneity, leading to partial doping of the bulk. We herein report the singular effect of a tantalum oxide (Ta2O5) thin film on Li[Ni0.8Mn0.1Co0.1]O2, generated by atomic layer deposition, offering the possibility of a high-level homogeneity and thickness control. After chemical analysis using X-ray photoelectron spectroscopy the composition of the deposited thin film is identified as lithium tantalate (LiTaO3). At an early degradation stage, clear improvements directly attributed to the coating, such as suppressed exothermic side-reactions (-51%), reduced released gas amounts (-14.8%) and less charge-transfer resistance growth (2x lower) are observed. However, at an advanced degradation stage, the materials show similar cycle life, as well as similar gassing behavior and an even higher charge-transfer resistance growth as compared to the uncoated material. This study highlights the necessity of bulk stabilization and identifies the effect of surface coatings on Ni-rich CAMs without any doping influence.

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supporting

confidence: 72%

Tantalum Oxide Coating of Ni-rich Cathode Active Material via Atomic Layer Deposition and its Influence on Gas Evolution and Electrochemical Performance in the Early and Advanced Stages of Degradation

Dalkilic¹,

Schmidt²,

Schladt³

et al. 2022

J. Electrochem. Soc.

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“…It can be seen from Figure 7 that the product Mn 3 O 4 was a solid powder, the baseline of the diffraction peak was flat, the peak pattern was narrow, and the peak intensity was high, so the crystallinity of the product was good. The cell size of Mn 3 O 4 was a = b = 0.576 nm, c = 0.945 nm, and the crystal volume was 0.314 nm 3 . The grain size was around 290 nm according to the Scherrer formula [42], which is consistent with the result of the previous electron microscopy scans.…”

Section: Phase Analysismentioning

confidence: 99%

“…Battery-grade Mn 3 O 4 could be used to prepare cathode materials for lithium-ion batteries and sodium-ion batteries. As one of the main materials for lithium-ion positive electrodes, LiMn 2 O 4 has been mainly prepared through the high-temperature calcination of electrolytic MnO 2 in industry [1][2][3][4]. More and more studies have shown that LiMn 2 O 4 prepared using Mn 3 O 4 has better electrochemical performance compared to electrolytic MnO 2 [5].…”

Section: Introductionmentioning

confidence: 99%

Study and Property Characterization of LiMn2O4 Synthesized from Octahedral Mn3O4

Wang,

Wang

et al. 2023

Sustainability

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The structure of Mn3O4 with an octahedron structure was similar to that of LiMn2O4, and the lithium manganate prepared with it had good electrochemical performance. During the preparation of octahedron Mn3O4, the effects of the pH regulator, temperature, and reaction pH on its morphology, specific surface area, and other properties were studied in this paper. LiMn2O4 was prepared from Octahedron Mn3O4 obtained by using better technology. The effects of calcination time and temperature on the physicochemical and electrochemical properties of LiMn2O4 were studied. The research results indicated that the optimal synthesis conditions for Mn3O4 were as follows: ammonia water was used as a pH regulator and complexing agent, reaction pH was 8, reaction temperature was 80 °C, reaction time was 12 h, and oxygen flow rate was 3 L∙min−1. The LiMn2O4 synthesized had a good octahedron morphology when the calcination temperature was 800 °C and the calcination time was 10 h. The first discharge-specific capacity was 121.9 mAh∙g−1 at a current density of 0.2 C, the discharge-specific capacity was 114.1 mAh∙g−1 after 100 cycles, and the capacity retention rate was 93.6%. Therefore, the lithium manganate prepared by using octahedron manganous oxide had good electrochemical reversibility and a good application prospect.

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“…With the rise of the new energy vehicle industry, breakthroughs in lithium-ion batteries [1][2][3][4] regarding high energy density and safety performance have become increasingly crucial. Currently, lithium-ion batteries employing organic liquid electrolytes have achieved significant success, and are widely used in commercial applications.…”

Section: Introductionmentioning

confidence: 99%

Defect chemistry engineering of Ga-doped garnet electrolyte with high stability for solid-state lithium metal batteries

Chen 陈,

Li 黎,

Liu 刘

et al. 2024

Chinese Phys. B

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Ga-doped Li7La3Zr2O12 (Ga-LLZO) has long been considered as a promising garnet-type electrolyte candidate for all-solid-state lithium metal batteries (ASSLBs) due to its high room temperature ionic conductivity. However, the typical synthesis of Ga-LLZO is usually accompanied by the formation of undesired LiGaO2 impurity phase that causes severe instability issue of electrolyte in contact with molten Li metal during half/full cells assembly. In this study, we show that by simply engineering the defect chemistry of Ga-LLZO, namely, the lithium deficiency level, LiGaO2 impurity phase is effectively inhibited in the final synthetic product. Consequently, defect chemistry engineered Ga-LLZO exhibits excellent electrochemical stability against lithium metal, while its high room temperature ionic conductivity (~1.9 × 10-3 S·cm-1) is well reserved. The assembled Li/Ga-LLZO/Li symmetric cell has a superior critical current density of 0.9 mA·cm-2, and cycles stably for 500 hours at a current density of 0.3 mA·cm-2. This research facilitates the potential commercial applications of high performance Ga-LLZO solid electrolyte in ASSLBs.

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Enhancement of electrochemical performance in lithium-ion battery via tantalum oxide coated nickel-rich cathode materials

Cited by 4 publications

References 48 publications

Tantalum Oxide Coating of Ni-rich Cathode Active Material via Atomic Layer Deposition and its Influence on Gas Evolution and Electrochemical Performance in the Early and Advanced Stages of Degradation

Tantalum Oxide Coating of Ni-rich Cathode Active Material via Atomic Layer Deposition and its Influence on Gas Evolution and Electrochemical Performance in the Early and Advanced Stages of Degradation

Study and Property Characterization of LiMn2O4 Synthesized from Octahedral Mn3O4

Defect chemistry engineering of Ga-doped garnet electrolyte with high stability for solid-state lithium metal batteries

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