Optimization of B2O3 coating process for NCA cathodes to achieve long-term stability for application in lithium ion batteries

Chen, Jiasheng; Wang, Xuan Liang; Jin, En Mei; Moon, Seung-Guen; Jeong, Sang Mun

doi:10.1016/j.energy.2021.119913

Cited by 26 publications

(8 citation statements)

References 52 publications

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“…In this work, we present gas evolution studies on high-Ni materials under development for commercial use by LG Energy Solution. These materials contain a boron-based surface coating designed to prevent low-voltage outgassing from surface carbonates. , As a result, the data presented here represents the performance/outgassing expected of true optimized commercial cathode materials. Despite these measures, the materials studied still show gas evolution at high voltage, which can be linked to particle cracking and electrolyte reactivity.…”

Section: Introductionmentioning

confidence: 99%

Particle Surface Cracking Is Correlated with Gas Evolution in High-Ni Li-Ion Cathode Materials

Kaufman

Huang

Lee³

et al. 2022

ACS Appl. Mater. Interfaces

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High-Ni layered oxide cathode materials (LiNi x TM(1–x)O2, where x > 0.8) are of great interest because they offer increased capacity compared to current commercial materials within a narrow voltage range. However, recent studies have shown that these materials in their current form suffer from capacity fading when an upper cutoff voltage above 4.3 V vs Li/Li+ is used. While many studies have focused on the H2 → H3 transition as the primary cause of capacity fading, gas evolution studies show that degradation processes cannot be attributed to the H2 → H3 transition alone. In this work, differential electrochemical mass spectrometry (DEMS) is combined with titration mass spectrometry (TiMS) to measure gases evolved in a lithium half-cell during cycling as well as surface species which evolve gas upon addition of strong acid to an extracted cathode. Along with qualitative observations of particle cracking by scanning electron microscopy (SEM), these results reveal correlations between particle cracking, electrolyte reactivity, and carbonate oxidation and deposition on the cathode surface during the first charge of high-Ni cathode materials.

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Section: Introductionmentioning

confidence: 99%

Particle Surface Cracking Is Correlated with Gas Evolution in High-Ni Li-Ion Cathode Materials

Kaufman

Huang

Lee³

et al. 2022

ACS Appl. Mater. Interfaces

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“…However, AW5 still remains in excellent cation ordering after 100 cycles, which indicates that Al 2 (WO 4 ) 3 reduces the mixed degree of cations and improves the stability of the structure of NCA. In addition, all samples show similar c/a values, indicating that Al 2 (WO 4 ) 3 has a little effect on the crystal structure of NCA …”

Section: Resultsmentioning

confidence: 85%

“…In addition, all samples show similar c/a values, indicating that Al 2 (WO 4 ) 3 has a little effect on the crystal structure of NCA. 48 The Raman spectra of AW5 before cycles are shown in Figure 6d. Four characteristic peaks appear at around 375 cm −1 (symmetric bending of v 2 ), 390 cm −1 (asymmetric bending of v 4 ), 843 cm −1 (asymmetric stretching of v 3 ), and 1050 cm −1 (symmetric stretching of v 1 ), which are assigned to the stretching modes of the WO 4 tetrahedra in Al 2 (WO 4 ) 3 .…”

Section: Resultsmentioning

confidence: 99%

Enhanced Electrochemical Performance and Safety of LiNi_0.88Co_0.1Al_0.02O₂ by a Negative Thermal Expansion Material of Orthorhombic Al₂(WO₄)₃

Xie

Lou

Luo

et al. 2022

ACS Appl. Mater. Interfaces

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LiNi0.88Co0.1Al0.02O2 (NCA) is attractive for high-energy batteries, but phase transition and side reactions leave large volume change and thermal runaway. In order to address the drawbacks, orthorhombic Al2(WO4)3, a cheap anisotropic negative thermal expansion material, was synthesized and adopted to modify NCA, and its effects on the electrochemical performance and safety of NCA were investigated using multifarious techniques. Al2(WO4)3 can greatly improve the rate performance, cyclability at different temperatures, thermal stability, and interface behavior and intensify charge transfer as well as decline the deformation and side reactions of NCA. The discharge capacity of the NCA modified with 5 wt % Al2(WO4)3 reaches 170.0 mA h/g at 5.0 C and 25 °C. After 100 cycles, the values of this electrode at 1.0 C and 25 °C and at 3.0 C and 60 °C are 164.2 and 148.7 mA h/g, respectively, much higher than those of the pure NCA under the same conditions. Moreover, Al2(WO4)3 declines the byproducts and cation mixing and decreases the released heat, strain, and charge-transfer resistance after cycles of NCA about 37.1, 33.0, and 32.8%, respectively. The improvement mechanism is discussed. It opens an effective avenue for the applications of energy materials by simultaneously adjusting heat, structure, interface, and deformation.

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“…Particularly, surface coating has been regarded as the most common and effective strategy to increase surface/interface stability and charge transportation. The coating materials can be categorized as metal compounds with electrochemical passivation (e.g., Al 2 O 3 , [76] ZrO 2 , [77] B 2 O 3 , [78] TiO 2 , [79] Y 2 O 3 , [80] MoO 3 , [81] SiO 2 , [82] CuO, [83] AlPO 4 , [84] FePO 4 , [85] Co x B [5c] etc. ), electrical conductors (e.g., carbon, [86] graphene, [87] polyaniline, [88] polypyrrole, [89] RuO 2 [90] etc.…”

Section: Surface/interface Engineeringmentioning

confidence: 99%

Challenges and Strategies towards Single‐Crystalline Ni‐Rich Layered Cathodes

Zhang

et al. 2022

Advanced Energy Materials

114

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The ever‐increasing energy density requirements in electric vehicles (EVs) have boosted the development of Ni‐rich layered oxide cathodes for state‐of‐the‐art lithium‐ion batteries. Nevertheless, the commercialization of polycrystalline Ni‐rich cathodes (PCNCs) is hindered by the severe performance degradation and safety concerns that are tightly related to its particle cracking during cycling. Single‐crystalline Ni‐rich cathodes (SCNCs) with eliminated grain boundaries and high mechanical strength have recently attracted extensive attention owing to their superior structural and cycling stability, which present high crack resistance during electrochemical operation. Various articles have focused on the trial‐and‐error synthesis and modifications of SCNCs, as well as the comparison of performances and mechanisms with PCNCs. However, there has been much less effort in systematic analysis and summary to reveal their key challenges, controversies, and the corresponding primary causes. In this review, the advantages and debates in structural and electrochemical properties of SCNCs over PCNCs are summarized to provide fundamental understanding of SCNCs. Then the current practical issues and challenges are comprehensively discussed from the viewpoints of both academia and industry, as well as the proposed modification strategies and underlying mechanisms for SCNCs. The outlook and perspectives are further given to facilitate the commercial applications of SCNCs in high‐performance EVs.

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Optimization of B2O3 coating process for NCA cathodes to achieve long-term stability for application in lithium ion batteries

Cited by 26 publications

References 52 publications

Particle Surface Cracking Is Correlated with Gas Evolution in High-Ni Li-Ion Cathode Materials

Particle Surface Cracking Is Correlated with Gas Evolution in High-Ni Li-Ion Cathode Materials

Enhanced Electrochemical Performance and Safety of LiNi_0.88Co_0.1Al_0.02O₂ by a Negative Thermal Expansion Material of Orthorhombic Al₂(WO₄)₃

Challenges and Strategies towards Single‐Crystalline Ni‐Rich Layered Cathodes

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Optimization of B2O3 coating process for NCA cathodes to achieve long-term stability for application in lithium ion batteries

Cited by 26 publications

References 52 publications

Particle Surface Cracking Is Correlated with Gas Evolution in High-Ni Li-Ion Cathode Materials

Particle Surface Cracking Is Correlated with Gas Evolution in High-Ni Li-Ion Cathode Materials

Enhanced Electrochemical Performance and Safety of LiNi0.88Co0.1Al0.02O2 by a Negative Thermal Expansion Material of Orthorhombic Al2(WO4)3

Challenges and Strategies towards Single‐Crystalline Ni‐Rich Layered Cathodes

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Enhanced Electrochemical Performance and Safety of LiNi_0.88Co_0.1Al_0.02O₂ by a Negative Thermal Expansion Material of Orthorhombic Al₂(WO₄)₃