Inhibition of excessive SEI-forming and improvement of structure stability for LiNi0.8Co0.1Mn0.1O2 by Li2MoO4 coating

Yu, Juan; Peng, Jiaxin; Huang, Wenlong; Wang, Lejie; Wei, Yinbo; Yang, Naixing; Li, Linbo

doi:10.1007/s11581-021-04085-y

Cited by 13 publications

(4 citation statements)

References 45 publications

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“…The high-resolution spectra of C 1s and F 1s prior to cycling are shown in Figure a,b, respectively. Both samples show similar peaks for C 1s; C–C peak (∼284.8 eV) is assigned to carbon black, while the C–H (∼286.6 eV) and C–F (∼291 eV) peaks are attributed to the PVDF binder. ,− The structure at ∼289 eV corresponds to CO and can be due to exposure of the electrode to air during storage. , In F 1s, the C–F peak (∼688 eV) is related to the PVDF binder and corresponds to the C–F peak in C 1s. , However, a bump at ∼685.5 eV attributed to Li–F is visible for LiF-NMC811 . This is in line with the TEM findings and further confirms the presence of the LiF coating on the NMC811 electrode.…”

Section: Results and Discussionmentioning

confidence: 96%

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High Voltage Cycling Stability of LiF-Coated NMC811 Electrode

Llanos,

Ahaliabadeh,

Miikkulainen

et al. 2024

ACS Appl. Mater. Interfaces

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The development of LiNi 0.8 Mn 0.1 Co 0.1 O 2 (NMC811) as a cathode material for high-energy-density lithium−ion batteries (LIBs) intends to address the driving limitations of electric vehicles. However, the commercialization of this technology has been hindered by poor cycling stability at high cutoff voltages. The potential instability and drastic capacity fade stem from irreversible parasitic side reactions at the electrode−electrolyte interface. To address these issues, a stable nanoscale lithium fluoride (LiF) coating is deposited on the NMC811 electrode via atomic layer deposition. The nanoscale LiF coating diminishes the direct contact between NMC811 and the electrolyte, suppressing the detrimental parasitic reactions. LiF-NMC811 delivers cycling stability superior to uncoated NMC811 with high cutoff voltage for half-cell (3.0−4.6 V vs Li/Li + ) and full-cell (2.8−4.5 V vs graphite) configurations. The structural, morphological, and chemical analyses of the electrodes after cycling show that capacity decline fundamentally arises from the electrode−electrolyte interface growth, irreversible phase transformation, transition metal dissolution and crossover, and particle cracking. Overall, this work demonstrates that LiF is an effective electrode coating for high-voltage cycling without compromising rate performance, even at high discharge rates. The findings of this work highlight the need to stabilize the electrode−electrolyte interface to fully utilize the high-capacity performance of NMC811.

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Section: Results and Discussionmentioning

confidence: 96%

“…3,10 In F 1s, the C−F peak (∼688 eV) is related to the PVDF binder and corresponds to the C−F peak in C 1s. 51,52 However, a bump at ∼685.5 eV attributed to Li−F is visible for LiF-NMC811. 50 This is in line with the TEM findings and further confirms the presence of the LiF coating on the NMC811 electrode.…”

Section: Structural and Chemicalmentioning

confidence: 99%

High Voltage Cycling Stability of LiF-Coated NMC811 Electrode

Llanos,

Ahaliabadeh,

Miikkulainen

et al. 2024

ACS Appl. Mater. Interfaces

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“…The maximum c/a value of α-NCM811 was 4.9651, and the c/a value of the samples gradually decreased with the increase in β-phase content, which indicated that the α-phase had larger layer spacing than the β-phase. The lower the value of I(006 + 102)/I(101), the better the order of the hexagonal dense-arrangement structure [29]. Obviously, α-NCM811 showed the worst hexagonal dense structure, with the lowest value of I(003)/I(104), which indicated the highest cationic mixing [30].…”

Section: Thermodynamic Model Of Co-precipitation Of Precursorsmentioning

confidence: 99%

Improving the Electrochemical Performance of Core–Shell LiNi0.8Co0.1Mn0.1O2 Cathode Materials Using Environmentally Friendly Phase Structure Control Process

Tian

Bao

et al. 2023

Energies

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The phase structure of the precursor is crucial for the microstructure evolution and stability of Ni-rich cathode materials. Using sodium lactate as a green complexing agent, cathode electrode materials with different phase structures and unique core–shell structures were prepared by the co-precipitation method in this study. The influence of the phase structure of the nickel-rich precursor on the cathode electrode materials was studied in depth. It was found that α-NCM811 had large interlayer spacing, which was beneficial for the diffusion of lithium ions. In contrast, β-NCM811 had smaller interlayer spacing, a good layered structure, and lower ion mixing, resulting in better cycling performance. The core–shell-αβ-NCM811 with α-NCM811 as the core and β-NCM811 as the shell was prepared by combining the advantages of the two different phases. The core–shell-αβ-NCM811 showed the highest discharge capacity of 158.7 mAh/g at 5 C and delivered excellent rate performance. In addition, the β-NCM811 shell structure with smaller layer spacing could prevent corrosion of the α-NCM811 core by the electrolyte. Thus, the capacity retention rate of the core–shell-αβ-NCM811 was still as high as 86.16% after 100 cycles.

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“…[ 218 ] Thus, developed bio‐inspired cathodes owning self‐healing capabilities are significant for advanced LIBs, and core–shell structured electrodes possess excellent electrochemical performances and thermal safety. The general coating Ni‐rich cathode active materials include LiNi 0.8 Mn 0.1 Co 0.1 O 2 (NMC 811), [ 33 , 219 , 220 , 221 , 222 , 223 , 224 ] LiNi 0.6 Mn 0.2 Co 0.2 O 2 (NMC 622), [ 225 , 226 , 227 ] LiNi 0.5 Mn 0.3 Co 0.2 O 2 (NMC 532), [ 228 , 229 ] LiNi 0.4 Mn 0.4 Co 0.2 O 2 (NMC 442), [ 230 ] Li 1.2 Ni 0.13 Mn 0.54 Co 0.13 O 2 (NMC 13), [ 231 , 232 , 233 , 234 , 235 , 236 , 237 ] LiNi 0.85 Mn 0.10 Co 0.05 O 2 (NMC 8510), [ 238 ] LiNi 0.85 Mn 0.05 Co 0.1 O 2 (NMC 8505), [ 239 ] LiNi 0.83 Mn 0.06 Co 0.11 O 2 (NMC 83), [ 240 ] LiNi 0.5 Mn 1.5 O 4 (LNM), [ 241 , 242 ] LiCoO 2 (LCO), [ 243 ] etc. [ 244 , 245 , 246 , 247 ] For instance, polypyrrole–LiAlO 2 (PPy–LA) coats NMC 811 composites based on a dual‐conductive coating strategy ( Figure ...…”

Section: Self‐healing Electrodesmentioning

confidence: 99%

Bio‐Inspired Electrodes with Rational Spatiotemporal Management for Lithium‐Ion Batteries

Song,

Li,

Gao

et al. 2024

Advanced Science

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Lithium‐ion batteries (LIBs) are currently the predominant energy storage power source. However, the urgent issues of enhancing electrochemical performance, prolonging lifetime, preventing thermal runaway‐caused fires, and intelligent application are obstacles to their applications. Herein, bio‐inspired electrodes owning spatiotemporal management of self‐healing, fast ion transport, fire‐extinguishing, thermoresponsive switching, recycling, and flexibility are overviewed comprehensively, showing great promising potentials in practical application due to the significantly enhanced durability and thermal safety of LIBs. Taking advantage of the self‐healing core–shell structures, binders, capsules, or liquid metal alloys, these electrodes can maintain the mechanical integrity during the lithiation–delithiation cycling. After the incorporation of fire‐extinguishing binders, current collectors, or capsules, flame retardants can be released spatiotemporally during thermal runaway to ensure safety. Thermoresponsive switching electrodes are also constructed though adding thermally responsive components, which can rapidly switch LIB off under abnormal conditions and resume their functions quickly when normal operating conditions return. Finally, the challenges of bio‐inspired electrode designs are presented to optimize the spatiotemporal management of LIBs. It is anticipated that the proposed electrodes with spatiotemporal management will not only promote industrial application, but also strengthen the fundamental research of bionics in energy storage.

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Inhibition of excessive SEI-forming and improvement of structure stability for LiNi0.8Co0.1Mn0.1O2 by Li2MoO4 coating

Cited by 13 publications

References 45 publications

High Voltage Cycling Stability of LiF-Coated NMC811 Electrode

High Voltage Cycling Stability of LiF-Coated NMC811 Electrode

Improving the Electrochemical Performance of Core–Shell LiNi0.8Co0.1Mn0.1O2 Cathode Materials Using Environmentally Friendly Phase Structure Control Process

Bio‐Inspired Electrodes with Rational Spatiotemporal Management for Lithium‐Ion Batteries

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