A new coating for improving the electrochemical performance of cathode materials

Махонина, Е. В.; Medvedeva, A. A.; Dubasova, V. S.; Volkov, V. V.; Politov, Yu. А.; Еременко, И. Л.

doi:10.1016/j.ijhydene.2016.02.091

Cited by 18 publications

(6 citation statements)

References 19 publications

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“…94 The surfaces of commercial cathodes NMC and NCA are usually coated with Al 2 O 3 , TiO 2 , SiO 2 , AlPO 4 , ZrO 2 , etc. [95][96][97][98][99][100][101][102] Nevertheless, the capacity of the cathode is limited by typical coating materials such as Al 2 O 3 , SiO 2 , etc., because of the low Li + and electron conductivity. 103…”

Section: Surface Coatingmentioning

confidence: 99%

“…The coating layer acts as a barrier and shield between the electrolyte and the active component, greatly reducing the acidic corrosion from the electrolyte and essentially impeding TM from dissolving from the cathode during the cycle 94 . The surfaces of commercial cathodes NMC and NCA are usually coated with Al 2 O 3 , TiO 2 , SiO 2 , AlPO 4 , ZrO 2 , etc 95–102 . Nevertheless, the capacity of the cathode is limited by typical coating materials such as Al 2 O 3 , SiO 2 , etc., because of the low Li + and electron conductivity 103 …”

Section: Recent Approaches For Designing Co‐free Ni‐rich Layered Cath...mentioning

confidence: 99%

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Design of high‐performance and sustainable Co‐free Ni‐rich cathodes for next‐generation lithium‐ion batteries

Ge,

Shen,

Wang

et al. 2023

SusMat

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Great attention has been given to high‐performance and inexpensive lithium‐ion batteries (LIBs) in response to the ever‐increasing demand for the explosive growth of electric vehicles (EVs). High‐performance and low‐cost Co‐free Ni‐rich layered cathodes are considered one of the most favorable candidates for next‐generation LIBs because the current supply chain of EVs relies heavily on scarce and expensive Co. Herein, we review the recent research progress on Co‐free Ni‐rich layered cathodes, emphasizing on analyzing the necessity of replacing Co and the popular improvment methods. The current advancements in the design strategies of Co‐free Ni‐rich layered cathodes are summarized in detail. Despite considerable improvements achieved so far, the main technical challenges contributing to the deterioration of Co‐free Ni‐rich cathodes such as detrimental phase transitions, crack formation, and severe interfacial side reactions, are difficult to resolve by a single technique. The cooperation of multiple modification strategies is expected to accelerate the industrialization of Co‐free Ni‐rich layered cathodes, and the corresponding synergistic mechanisms urgently need to be studied. More effects will be aroused to explore high‐performance Co‐free Ni‐rich layered cathodes to promote the sustainable development of LIBs.

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Section: Surface Coatingmentioning

confidence: 99%

Section: Recent Approaches For Designing Co‐free Ni‐rich Layered Cath...mentioning

confidence: 99%

Design of high‐performance and sustainable Co‐free Ni‐rich cathodes for next‐generation lithium‐ion batteries

Ge,

Shen,

Wang

et al. 2023

SusMat

View full text Add to dashboard Cite

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“…The PPy-LiAlO 2 coated NCM cathode material, which displayed a superior reversible capacity of 128 mAh g À 1 at 2 A g À 1 and 92.8 % of the initial capacity was maintained over 100 cycles. Makhonina et al [42] improved the cycling performance and rate capability of the cathode material by co-coating Al 2 O 3 and carbon on the surface of NCM424. The Al 2 O 3 epitaxial layer was easily penetrated by Li + ions, while the amorphous carbon film could enhance the conductivity of the coating and prevent the loss of electrical contact between the cathode material grains.…”

Section: Introductionmentioning

confidence: 99%

“…The PPy‐LiAlO 2 coated NCM cathode material, which displayed a superior reversible capacity of 128 mAh g −1 at 2 A g −1 and 92.8 % of the initial capacity was maintained over 100 cycles. Makhonina et al [42] . improved the cycling performance and rate capability of the cathode material by co‐coating Al 2 O 3 and carbon on the surface of NCM424.…”

Section: Introductionmentioning

confidence: 99%

Graphene/Ta₂O₅ co‐coating to improve the electrochemical performance of cathode material LiNi_0.5Co_0.2Mn_0.3O₂ for lithium‐ion batteries

Zhang,

Dang,

et al. 2024

ChemistrySelect

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The cycling and rate capabilities of LiNi0.5Co0.2Mn0.3O2 (NCM523) cathode material under high cut‐off voltage (≥4.5 V) and high current density have attracted much attention. However, the material‘s insufficient intrinsic electronic/ion conductivity and interface instability are still key issues restricting its electrochemical performance.In this paper, a graphene/Ta2O5 co‐coating layer is successfully fabricated on the surface of NCM523 to form a cathode material of GTa‐NCM523 to enhance both the electron and lithium‐ion transport during cathode operation. The GTa‐NCM523 cathode material achieves a discharge specific capacity of 147.4 mAh g−1 after 600 cycles at a voltage of 3.0–4.5 V and a rate of 1 C (180 mA g−1) with a capacity retention rate of 81.4 %. In contrast, the uncoated NCM523 only retains 63.2 % of its capability. At an elevated rate of 10 C (1800 mA g−1), the GTa‐NCM523 can achieve a discharge‐specific capacity of up to 113.5 mAh g−1, which is 43.7 % higher than the uncoated NCM523. The co‐coating layer can inhibit HF erosion and accelerate the movement of lithium‐ions and electrons, which account for the superior electrochemical characteristics of the co‐coating layer comprised of graphene and Ta2O5.

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“…Furthermore, modification can slow down the structural collapse of electrode materials during cycles, which improves cycling and safety performance. Stable materials used for surface modification are usually metallic oxides, fluorides, phosphates, and carbon . Among these materials, carbon is attractive, and a graphene carbon layer with 3D morphology on the surface of Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 simultaneously combines the advantages of a shortened ionic diffusion pathway and high conductivity as well as structural protection layers to increase cyclability .…”

Section: Introductionmentioning

confidence: 99%

Enhanced Electrochemical Performance of LiNi_0.6Co_0.2Mn_0.2O₂ by Expanded Graphite

et al. 2019

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High‐capacity ternary materials are attractive for the development of electric vehicles for long‐distance driving, but they still face some challenges. To improve the performance, expanded graphite (EG) with a unique loose‐layered structure is mixed with (Ni0.6Co0.2Mn0.2)(OH)2 and LiOH·H2O aqueous solution to supply microscale reaction space and limit grain growth via hydrothermal treatment as well as accommodate LiNi0.6Co0.2Mn0.2O2 (NCM622) particles between the graphene layers. The key factors affecting electrochemical performance are investigated using various techniques. The NCM622 sample synthesized by adding 6.6 wt% of EG (PEG6.6%) exhibits the best performance. EG improves the discharge capacity of NCM622 from 156 to 175 mAh g−1 after 50 cycles at 1 C. As the surrounding temperature increases to 60 °C, the sample also shows good cyclability at 1 C, the 50th discharge specific capacity remains 153 mAh g−1 and the capacity retention rate is 82.3%, which is much higher than that of NCM622. Also, the columbic efficiency of NCM622 after 50 cycles improves from 69% to 99% with EG. The possible enhanced mechanism of NCM622 by EG is discussed. The effective way to enhance the performance using the layered structure of EG is promising for other energy materials.

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A new coating for improving the electrochemical performance of cathode materials

Cited by 18 publications

References 19 publications

Design of high‐performance and sustainable Co‐free Ni‐rich cathodes for next‐generation lithium‐ion batteries

Design of high‐performance and sustainable Co‐free Ni‐rich cathodes for next‐generation lithium‐ion batteries

Graphene/Ta₂O₅ co‐coating to improve the electrochemical performance of cathode material LiNi_0.5Co_0.2Mn_0.3O₂ for lithium‐ion batteries

Enhanced Electrochemical Performance of LiNi_0.6Co_0.2Mn_0.2O₂ by Expanded Graphite

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A new coating for improving the electrochemical performance of cathode materials

Cited by 18 publications

References 19 publications

Design of high‐performance and sustainable Co‐free Ni‐rich cathodes for next‐generation lithium‐ion batteries

Design of high‐performance and sustainable Co‐free Ni‐rich cathodes for next‐generation lithium‐ion batteries

Graphene/Ta2O5 co‐coating to improve the electrochemical performance of cathode material LiNi0.5Co0.2Mn0.3O2 for lithium‐ion batteries

Enhanced Electrochemical Performance of LiNi0.6Co0.2Mn0.2O2 by Expanded Graphite

Contact Info

Product

Resources

About

Graphene/Ta₂O₅ co‐coating to improve the electrochemical performance of cathode material LiNi_0.5Co_0.2Mn_0.3O₂ for lithium‐ion batteries

Enhanced Electrochemical Performance of LiNi_0.6Co_0.2Mn_0.2O₂ by Expanded Graphite