Electrochemical performance of La2O3-coated layered LiNiO2 cathode materials for rechargeable lithium-ion batteries

Mohan, P. Maruthi; Kalaignan, G. Paruthimal

doi:10.1007/s11581-012-0821-x

Cited by 30 publications

(17 citation statements)

References 30 publications

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“…A number of previous experimental studies have been performed on SiO 2 coating layers on different types of cathodes. SiO 2 has been coated on the layered structure materials LiNi 0.8 Co 0.15 Al 0.05 O 2 [33] and LiNiO 2 , [66] olivine LiFePO 4 , [35] monoclinic Li 3 V 2 (PO 4 ) 3 [34] and spinel LiNi 0.5 Mn 1.5 O 4 . [67] All of these examples reported enhanced structural stability, improved capacity retention and better electrochemical performance of the cathode material associated with the SiO 2 coating.…”

Section: Discussionmentioning

confidence: 99%

Lithium transport through lithium-ion battery cathode coatings

et al. 2015

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The surface coating of cathodes using insulator films has proven to be a promising method for high-voltage 10 cathode stabilization in Li-ion batteries, but there is still substantial uncertainty about how these films function. More 11 specifically, there is limited knowledge of lithium solubility and transport through the films, which is important for coating 12 design and development. This study uses first-principles calculations based on Density Functional Theory to examine the 13 diffusivity of interstitial lithium in the crystals of α-AlF3, α-Al2O3, m-ZrO2, c-MgO, and α-quartz SiO2, which provide benchmark 14 cases for further understanding of insulator coatings in general. In addition, we propose an Ohmic electrolyte model to predict 15 resistivities and overpotential contributions under battery operating conditions. For the crystalline materials considered we 16 predict that Li + diffuses quite slowly, with a migration barrier larger than 0.9 eV in all crystalline materials except α-quartz SiO2, 17 which is predicted to have a migration barrier of 0.276 eV along <001>. These results suggest that the stable crystalline forms of 18 these insulator materials, except for oriented α-quartz SiO2, are not practical for conformal cathode coatings. Amorphous Al2O3 19 and AlF3 have higher Li + diffusivities than their crystalline counterparts. Our predicted amorphous Al2O3 resistivity (1789 MΩm) is 20 close to the top of the range of the fitted resistivities extracted from previous experiments on nominal Al2O3 coatings (7.8 to 913 21 MΩm) while our predicted amorphous AlF3 resistivity (114 MΩm) is very close to the middle of the range. These comparisons 22 support our framework for modeling and understanding the impact on overpotential of conformal coatings in terms of their 23 fundamental thermodynamic and kinetic properties, and support that these materials can provide practical conformal coatings 24 in their amorphous form.25 I. Introduction 26 27 Surface modification of the cathode by artificial coating is an effective strategy to stabilize Li-ion batteries (LIBs) 28 operating at high voltages.[1-10] Nevertheless, the coating functionalities and the stabilizing mechanisms are still not 29 fully understood and currently a subject of intensive research in the development of next-generation LIBs. Several 30 roles for the coating have been proposed to account for its positive impacts on the cathode performance, including: (i) 31 electrical conduction medium that facilitates electron transport between cathode active particles,[11] (ii) modifier of 32 cathode surface chemistry that changes chemical properties of the cathode surface to improve stability and 33 performance,[12] (iii) HF scavenger that locally reduces the acidity of the electrolyte near the cathode surface, thereby 34 reducing electrolyte degradation,[13-15] and (iv) physical protection barrier that suppresses electrolyte oxidation and 35 cathode corrosion. [8,[16][17][18][19][20] In general, role (iii) and, particularly, role (iv) are the most widely cl...

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Section: Discussionmentioning

confidence: 99%

Lithium transport through lithium-ion battery cathode coatings

et al. 2015

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“…The same results are also observed in lanthanum ion substituted and doped cathode materials as well as La 2 O 3 anode material. [19][20][21] The columbic efficiency results also proved that the lithium ions participating in the charging reaction return back in the discharge cycles and the columbic efficiency reached near 95-100% after few cycles. The initial columbic efficiency decrement was attributed to the irreversible lithium ion reaction with the electrode and consecutive formation of the solid electrolyte interface.…”

Section: Electrochemical Measurementsmentioning

confidence: 75%

“…[15][16][17] Literature reports also suggest that rare earth ion doped cathode materials and their oxide coated counterparts are used in lithium ion batteries to improve the thermal stability and battery life cycle stability. [18][19][20] Recently, M. Sasidharan et al used La 2 O 3 as anode material in lithium ion batteries and showed good cycleability. 21 In order to utilize the advantages of rare earth ion based anode materials in lithium ion batteries, reported literature results are examined thoroughly.…”

Section: Introductionmentioning

confidence: 99%

Lanthanum ion (La³⁺) substituted CoFe₂O₄ anode material for lithium ion battery applications

et al. 2015

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“…A wide range of soft chemical methods such as solution refluxtion, 27 sonochemical, 28 sol-gel, 29 mechanochemical 30 and polymeric precursors 31 have been used for coating metal oxide layers on the surface of other metal oxides. The challenges in fabricating coated metal oxides by these processes are the higher precursor cost such as metal alkoxides in the sol-gel process, longer processing time and poor control in coating thickness as well as uniformity.…”

Section: Introductionmentioning

confidence: 99%

Facile fabrication and characterisation of MoO₃coated nanocrystalline ZrO₂by polymeric resin route

Vivekanandhan

Venkateswarlu²,

Rawls

et al. 2013

Advances in Applied Ceramics

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Surface modification of nanocrystalline ZrO 2 powder with an ultrathin MoO 3 layer was successfully carried out by a polymeric resin route using polyacrylic acid and ethylene glycol as precursors. Polyacrylic acid plays a vital role in this process, not only as the chelating agent for the molybdate cluster but also to form the uniform layer of molybdate dispersed polymeric resin on the surface of ZrO 2 . Thermal decomposition of the resin intermediate at 500uC creates the organic free MoO 3 layer on the ZrO 2 surface. Fourier transform infrared, X-ray diffraction and SEM energy dispersive spectroscopy analysis confirm the uniform formation of crystalline MoO 3 on the surface of the ZrO 2 powder. Further, the MoO 3 layer thickness was identified by TEM characterisation and was found to be y3 nm.

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Electrochemical performance of La2O3-coated layered LiNiO2 cathode materials for rechargeable lithium-ion batteries

Cited by 30 publications

References 30 publications

Lithium transport through lithium-ion battery cathode coatings

Lithium transport through lithium-ion battery cathode coatings

Lanthanum ion (La³⁺) substituted CoFe₂O₄ anode material for lithium ion battery applications

Facile fabrication and characterisation of MoO₃coated nanocrystalline ZrO₂by polymeric resin route

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Electrochemical performance of La2O3-coated layered LiNiO2 cathode materials for rechargeable lithium-ion batteries

Cited by 30 publications

References 30 publications

Lithium transport through lithium-ion battery cathode coatings

Lithium transport through lithium-ion battery cathode coatings

Lanthanum ion (La3+) substituted CoFe2O4 anode material for lithium ion battery applications

Facile fabrication and characterisation of MoO3coated nanocrystalline ZrO2by polymeric resin route

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Lanthanum ion (La³⁺) substituted CoFe₂O₄ anode material for lithium ion battery applications

Facile fabrication and characterisation of MoO₃coated nanocrystalline ZrO₂by polymeric resin route