Nano-Y2O3-coated LiNi0.5Co0.2Mn0.3O2 cathodes with enhanced electrochemical stability under high cut-off voltage and high temperature

Xu, Junna; Chen, Xiaoqing; Wang, Chunhui; Yang, Lishan; Gao, Xiong; Zhou, Yong; Xiao, Kesong; Xi, Xiaoming

doi:10.1016/j.ceramint.2017.06.028

Cited by 30 publications

(21 citation statements)

References 28 publications

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“…Several efforts have been done to improve the cycling stability of LIBs with high working voltage, such as doping other metal atoms into the cathode framework, coating covering layer on the surface of cathode and effective electrolyte additives . However, the reason of the poor cycle behavior at high cut‐off potential caused by accelerated degradation is still unclear …”

Section: Introductionsupporting

confidence: 92%

New Insights for the Abuse Tolerance Behavior of LiMn₂O₄ under High Cut‐Off Potential Conditions

et al. 2018

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The further development of lithium-ion batteries is often desired to obtain higher capacities by charging to higher potentials. However, such a high potential (> 4.3 V) will inevitably result in capacity loss of the LiMn 2 O 4 cathode material over numerous cycles. In this work, degradation mechanisms of LiMn 2 O 4 electrode cycled at different charge cut-off potentials (4.4, 4.5, 4.6, 4.7, and 4.8 V vs. Li/Li + , respectively) have been investigated. It is found that the capacity degraded seriously after aging cycles at the cut-off potentials (< 4.6 V), especially at 4.4 V. Remarkably, a thicker cathode-electrolyte interface (CEI) film on the cathode surface can be observed when the potential reached 4.7 and 4.8 V. Thus, two degradation mechanisms are proposed, which are also verified by the calculation of the diffusion coefficient of Li + ions (D Li + ). This work demonstrates the relationship between the capacity fade and cut-off potentials and provides a useful guidance for other cathode materials with high-voltage operation.

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Section: Introductionsupporting

confidence: 92%

New Insights for the Abuse Tolerance Behavior of LiMn₂O₄ under High Cut‐Off Potential Conditions

et al. 2018

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“…The above results indicate that the composite coating conspicuously improves the cycling performances of materials relative to the single coating of Y 2 O 3, [25,26] which profits from the well-proportioned composite coated layer in virtue of the synergistic effect of excellent fluidity of H 3 BO 3 and exceptional stability of Y 2 O 3 . With the increase of coated content, the coated layer becomes thicker gradually, which hinders the migration of Li + in the electrochemical reaction and reduces the electrochemical performance of the material.…”

Section: Resultsmentioning

confidence: 89%

“…[23,24] Dai et al [25] has reported that the Y 2 O 3 coated LiNi 0.8 Co 0.1 Al 0.1 O 2 material displays a better capacity retention rate of 91.45 % after 100 cycles. Xu et al [26] has synthesized a Nano-Y 2 O 3 -coated LiNi 0.5 Co 0.2 Mn 0.3 O 2 material, which exhibits the capacity retention rate of 87.8 % after 100 cycles. However, the improvement of single coating on cycling performance is restricted and the uniformity of the coated layer is difficult to be achieved.…”

Section: Introductionmentioning

confidence: 99%

Improving Electrochemical Cycling Stability of Ni‐rich LiNi_0.91Co_0.06Al_0.03O₂ Cathode Materials through H₃BO₃ and Y₂O₃ Composite Coating

Kou

Zhang

et al. 2020

ChemElectroChem

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The nickel-rich LiNi 0.91 Co 0.06 Al 0.03 O 2 cathode material has attracted wide attention due to its high energy density and appropriate thermal stability; however, its practical application has been greatly restricted by exorbitant residual LiOH/Li 2 CO 3 and poor cycling performance. In this work, we have reduced the residual LiOH/Li 2 CO 3 by washing the LiNi 0.91 Co 0.06 Al 0.03 O 2 fabricated through a high-temperature solid-state method and improved the cycling performance with a composite coating process. The results show that the amount of residual LiOH/ Li 2 CO 3 in the washed materials is significantly decreased, which is very favorable for the processability of materials. Li-Ni 0.91 Co 0.06 Al 0.03 O 2 with 0.1 wt% composite coating exhibits optimum properties: the discharge capacity reaches 217.4 mAh/ g at 0.1 C, the cycling retention still remains at 93.7 % after 100 cycles at 1 C, and the cycling retention of the soft-packing battery remains as high as 81.7 % after 800 cycles at 1 C. The excellent electrochemical performances are attributed to the synergistic effect of excellent fluidity of H 3 BO 3 and outstanding stability of Y 2 O 3 , mitigating the interface reaction between electrolyte and cathode material.

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“…At the first cycle of pristine c‐NCM, the anodic peak at 4.01 V relates to the oxidation of Ni 2+ /Ni 4+ and the delithiation progress, whereas the cathodic peak located at 3.71 V represents the lithiation of NCM523 and the reduction of Ni 2+ /Ni 4+ . In addition, the anodic peak potential shifts to a lower voltage in the subsequent two cycles, which indicates the activation of the electrode . The potential interval (▵ E p ) between the cathodic and anodic peaks indicates the electrode polarization .…”

Section: Resultsmentioning

confidence: 99%

Ameliorating Interfacial Issues of LiNi _0.5 Co _0.2 Mn _0.3 O ₂ /Poly(propylene carbonate) by Introducing Graphene Interlayer for All‐Solid‐State Lithium Batteries

Zhuang

Yang

et al. 2020

ChemistrySelect

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Interfacial side reaction mechanism between poly(propylene carbonate) solid polymer electrolyte (PPC‐SPE) and LiNi0.5Co0.2Mn0.3O2 cathode (c‐NCM) is investigated. Ni3+ and Co4+ species generated by electrochemical oxidization process can decompose poly(propylene carbonate) to aldehyde. To address this interface issue, a graphene interlayer is introduced to the LiNi0.5Co0.2Mn0.3O2 cathode surface via a facile method to improve cycle stability, rate capability and interfacial resistance. After 50 cycles at 0.3 C, the capacity retention of G@c‐NCM is 97.9 % and the resistance is less than 20 Ω, the improved electrochemical properties can be attributed to the graphene interlayer slows the side reaction, facilitates interfacial charge‐transfer process and stabilizes the cathode structure. These results demonstrate that modifying LiNi0.5Co0.2Mn0.3O2 (NCM523) cathode surface with graphene interlayer is conducive to enhance the electrochemical performance of all‐solid‐state lithium batteries.

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Nano-Y2O3-coated LiNi0.5Co0.2Mn0.3O2 cathodes with enhanced electrochemical stability under high cut-off voltage and high temperature

Cited by 30 publications

References 28 publications

New Insights for the Abuse Tolerance Behavior of LiMn₂O₄ under High Cut‐Off Potential Conditions

New Insights for the Abuse Tolerance Behavior of LiMn₂O₄ under High Cut‐Off Potential Conditions

Improving Electrochemical Cycling Stability of Ni‐rich LiNi_0.91Co_0.06Al_0.03O₂ Cathode Materials through H₃BO₃ and Y₂O₃ Composite Coating

Ameliorating Interfacial Issues of LiNi _0.5 Co _0.2 Mn _0.3 O ₂ /Poly(propylene carbonate) by Introducing Graphene Interlayer for All‐Solid‐State Lithium Batteries

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Nano-Y2O3-coated LiNi0.5Co0.2Mn0.3O2 cathodes with enhanced electrochemical stability under high cut-off voltage and high temperature

Cited by 30 publications

References 28 publications

New Insights for the Abuse Tolerance Behavior of LiMn2O4 under High Cut‐Off Potential Conditions

New Insights for the Abuse Tolerance Behavior of LiMn2O4 under High Cut‐Off Potential Conditions

Improving Electrochemical Cycling Stability of Ni‐rich LiNi0.91Co0.06Al0.03O2 Cathode Materials through H3BO3 and Y2O3 Composite Coating

Ameliorating Interfacial Issues of LiNi 0.5 Co 0.2 Mn 0.3 O 2 /Poly(propylene carbonate) by Introducing Graphene Interlayer for All‐Solid‐State Lithium Batteries

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New Insights for the Abuse Tolerance Behavior of LiMn₂O₄ under High Cut‐Off Potential Conditions

New Insights for the Abuse Tolerance Behavior of LiMn₂O₄ under High Cut‐Off Potential Conditions

Improving Electrochemical Cycling Stability of Ni‐rich LiNi_0.91Co_0.06Al_0.03O₂ Cathode Materials through H₃BO₃ and Y₂O₃ Composite Coating

Ameliorating Interfacial Issues of LiNi _0.5 Co _0.2 Mn _0.3 O ₂ /Poly(propylene carbonate) by Introducing Graphene Interlayer for All‐Solid‐State Lithium Batteries