High potential performance of Cerium-doped LiNi0.5Co0.2Mn0.3O2 cathode material for Li-ion battery

Li, Xia; Qiu, Kehui; Gao, Yuyan; He, Xia; Zhou, Fangdong

doi:10.1007/s10853-015-8856-9

Cited by 87 publications

(21 citation statements)

References 30 publications

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“…[11][12][13] To solve these issues, some strategies (such as surface modification and ion doping) have been employed to improve NCM523. 14 Metal oxides [15][16][17] (such as Al 2 O 3 , ZnO, and TiO 2 ), fluorides 18,19 (such as LiF and AlF 3 ), and phosphates 20 are commonly used as coating materials to protect the electrode material by preventing it from contacting electrolyte. 21,22 Furthermore, to obtain better lithium-ion conductivity, superionic conductors were explored as the coating materials.…”

Section: Introductionmentioning

confidence: 99%

Surface modification of LiNi _0.5 Co _0.2 Mn _0.3 O ₂ cathode materials with Li ₂ O‐B ₂ O ₃ ‐LiBr for lithium‐ion batteries

Wang

2019

Int J Energy Res

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Summary LiNi0.5Co0.2Mn0.3O2 (NCM523) cathode material suffers from phase transformation and electrochemical performance degradation as its main drawbacks, which are strongly dependent on the surface state of NCM523. Herein, an effective surface modification approach was demonstrated; namely, the fast lithium‐ion conductor (Li2O‐B2O3‐LiBr) was coated on NCM523. The Li2O‐B2O3‐LiBr coating layer as a protecting shell can prevent NCM523 particles from corrosion by the acidic electrolyte, leading to a superior discharge capacity, rate capability, and cycling stability. At room temperature, the Li2O‐B2O3‐LiBr–coated NCM523 exhibited an excellent capacity retention of 87.7% after 100 cycles at the rate of 1 C, which is remarkably better than that (29.8%) without the uncoated layer. Furthermore, the coating layer also increased the discharge capacity of NCM523 cathode material from 68.7 to 117.0 mAh g−1 at 5 C. Those can be attributed to the reduction in the electrode polarization and improvement in the electrode conductivity, which was supported by electrochemical impedance spectroscopy and cyclic voltammetry measurements.

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Section: Introductionmentioning

confidence: 99%

Surface modification of LiNi _0.5 Co _0.2 Mn _0.3 O ₂ cathode materials with Li ₂ O‐B ₂ O ₃ ‐LiBr for lithium‐ion batteries

Wang

2019

Int J Energy Res

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“…Although the above results give reasonable macro trends for diffusivity variation with state of charge, the diffusivity magnitudes have wide variations depending on the active area definition used. Further diffusivity computations for NCM523 have been undertaken by Kong et al 24 (EIS), Xia et al 25 (EIS) and Amin et al 26 (EIS and GITT at multiple temperatures).…”

mentioning

confidence: 99%

Galvanostatic Intermittent Titration and Performance Based Analysis of LiNi_0.5Co_0.2Mn_0.3O₂Cathode

Verma

Smith

Santhanagopalan

et al. 2017

J. Electrochem. Soc.

122

127

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Galvanostatic intermittent titration technique (GITT) -a popular method for characterizing kinetic and transport properties of battery electrodes -is predicated on the proper evaluation of electrode active area. LiNi 0.5044 Co 0.1986 Mn 0.2970 O 2 (NCM523) material exhibits a complex morphology in which sub-micron primary particles aggregate to form secondary particle agglomerates. This work proposes a new active area formulation for primary/secondary particle agglomerate materials to better mimic the morphology of NCM532 electrodes. This formulation is then coupled with macro-homogeneous models to simulate GITT and half-cell performance of NCM523 electrodes. Subsequently, the model results are compared against the experimental results to refine the area formulation. A single parameter, the surface roughness factor, is proposed to mimic the change in interfacial area, diffusivity and exchange current density simultaneously and detailed modeling results are presented to provide valuable insights into the efficacy of the formulation. Lithium ion batteries (LIBs) are ubiquitous in energy storage applications. LIBs are versatile and have completely penetrated the consumer electronics market involving low power applications, e.g. mobile phones and laptops.1 In recent years, the use of LIBs in high power applications like electric vehicles is showing great promise. Consequently, vigorous efforts are being directed toward improving its capacity and rate capabilities. LIB energy and power density is directly related to the constituent anode/cathode chemistries. The couples are chosen such that potential difference between the electrodes and Li + ions storage capacity are maximized. Additionally, fast intercalation and diffusion in the solid phase are required for high energy efficiency at high power demands. For anode, graphite has proved to be a valuable material with maximum theoretical capacity estimated at 372 mAh/g graphite combined with open circuit potential close to 0.0 V vs Li for wide range of state of charge. Graphite as an anode material shows robust cycling performance, decent rate capabilities and satisfactory thermal stability.3,4 Current cathodes generally exhibit lower theoretical capacity compared to anodes. Thus, a significant share of research efforts have been concentrated on finding and characterizing novel LIB cathode materials.Several It is apparent that GITT and EIS have emerged as robust electrochemical techniques for battery material characterization. However, extraction of accurate kinetic and transport quantities from GITT and EIS necessitates the precise computation of interfacial area, which gets even more complicated for NCM523 particle agglomerates exhibiting bimodal particle size distribution. Thus, it becomes imperative to design first an accurate mathematical descriptor of active area for NCM523 electrodes. This estimate is then coupled with macro homogeneous performance models to simulate GITT and half-cell performance of NCM523 electrodes. Refinement of the area estimates is execut...

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“…[10][11][12][13] The Li + /Ni 2 + cation mixingi sb elieved to be ak ey factor for the structural instability and phase transformation during the electrochemical cycling and it also leads to the high activationenergy barrierfor Li diffusion. [26][27][28][29][30][31][32][33][34][35][36] Among these, bulk doping has proved to be an effective method to enhancet he cycle and rate performance by stabilizing the structure and increasing the Li + diffusion rate. [26][27][28][29][30][31][32][33][34][35][36] Among these, bulk doping has proved to be an effective method to enhancet he cycle and rate performance by stabilizing the structure and increasing the Li + diffusion rate.…”

Section: Introductionmentioning

confidence: 99%

“…[14][15][16][17][18] Various strategies have been proposed to improvet he electrochemical performance of layered Ni-rich cathode materials including composite material design, [8,19,20] surface coating, [21][22][23][24][25] and bulk doping. [31][32][33] Several doping elements have been investigated, [26][27][28][29][30] of which Zr is considered to be ap romising dopant because of itsl arger ionic radius compared to other transition metals (Ni 2 + ,C o 3 + ,a nd Mn 4 + )a long with as trongerZ r ÀO bond formation compared with Ni, Co, andM n. Zr-doped layered cathode materials have shown enhanced cycle life and rate capability.T he improved electrochemical performance of Zr-doped layered cathode materials has been attributedt or educed cation mixing, fast Li + -transportation kinetics, and lower impedance, which has been mainly confirmed by Rietveld refinementa nd electrochemical impedance spectroscopy (EIS). [31][32][33] Several doping elements have been investigated, [26][27][28][29][30] of which Zr is considered to be ap romising dopant because of itsl arger ionic radius compared to other transition metals (Ni 2 + ,C o 3 + ,a nd Mn 4 + )a long with as trongerZ r ÀO bond formation compared with Ni, Co, andM n. Zr-doped layered cathode materials have shown enhanced cycle life and rate capability.T he improved electrochemical performance of Zr-doped layered cathode materials has been attributedt or educed cation mixing, fast Li + -transportation kinetics, and lower impedance, which has been mainly confirmed by Rietveld refinementa nd electrochemical impedance spectroscopy (EIS).…”

Section: Introductionmentioning

confidence: 99%

“…[26][27][28][29][30][31][32][33][34][35][36] Among these, bulk doping has proved to be an effective method to enhancet he cycle and rate performance by stabilizing the structure and increasing the Li + diffusion rate. [31][32][33] Several doping elements have been investigated, [26][27][28][29][30] of which Zr is considered to be ap romising dopant because of itsl arger ionic radius compared to other transition metals (Ni 2 + ,C o 3 + ,a nd Mn 4 + )a long with as trongerZ r ÀO bond formation compared with Ni, Co, andM n. Zr-doped layered cathode materials have shown enhanced cycle life and rate capability.T he improved electrochemical performance of Zr-doped layered cathode materials has been attributedt or educed cation mixing, fast Li + -transportation kinetics, and lower impedance, which has been mainly confirmed by Rietveld refinementa nd electrochemical impedance spectroscopy (EIS). [31,[33][34][35][36][37][38][39][40][41] However,t he microscopici nvestigation of cation mixing and structural stabilitya tt he atomics cale has not yet been demonstrated.…”

Section: Introductionmentioning

confidence: 99%

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The Role of Zr Doping in Stabilizing Li[Ni_0.6Co_0.2Mn_0.2]O₂ as a Cathode Material for Lithium‐Ion Batteries

et al. 2019

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Ni‐rich layered LiNi1−x−yCoxMnyO2 systems are the most promising cathode materials for high energy density Li‐ion batteries (LIBs). However, Ni‐rich cathode materials inevitably suffer from rapid capacity fading and poor rate capability owing to structural instability and unstable surface side reactions. Zr doping has proven to be an effective method to enhance the cycle and rate performances by stabilizing the structure and increasing the Li+ diffusion rate. Herein, effects of Zr‐doping on the structural stability and Li+ diffusion kinetics are thoroughly investigated in LiNi0.6Co0.2Mn0.2O2 (LNCM) cathode material using atomic‐resolution scanning transmission electron microscopy imaging, XRD Rietveld refinement, and density functional theory calculations. Zr doping mitigates the degree of cation mixing, decreases the structural transformation, and facilitates Li+ diffusion resulting in improved cyclic performance and rate capability. Based on the obtained results, an atomistic model is proposed to explain the effects of Zr doping on the structural stability and Li+ diffusion kinetics in LNCM cathode materials.

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High potential performance of Cerium-doped LiNi0.5Co0.2Mn0.3O2 cathode material for Li-ion battery

Cited by 87 publications

References 30 publications

Surface modification of LiNi _0.5 Co _0.2 Mn _0.3 O ₂ cathode materials with Li ₂ O‐B ₂ O ₃ ‐LiBr for lithium‐ion batteries

Surface modification of LiNi _0.5 Co _0.2 Mn _0.3 O ₂ cathode materials with Li ₂ O‐B ₂ O ₃ ‐LiBr for lithium‐ion batteries

Galvanostatic Intermittent Titration and Performance Based Analysis of LiNi_0.5Co_0.2Mn_0.3O₂Cathode

The Role of Zr Doping in Stabilizing Li[Ni_0.6Co_0.2Mn_0.2]O₂ as a Cathode Material for Lithium‐Ion Batteries

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High potential performance of Cerium-doped LiNi0.5Co0.2Mn0.3O2 cathode material for Li-ion battery

Cited by 87 publications

References 30 publications

Surface modification of LiNi 0.5 Co 0.2 Mn 0.3 O 2 cathode materials with Li 2 O‐B 2 O 3 ‐LiBr for lithium‐ion batteries

Surface modification of LiNi 0.5 Co 0.2 Mn 0.3 O 2 cathode materials with Li 2 O‐B 2 O 3 ‐LiBr for lithium‐ion batteries

Galvanostatic Intermittent Titration and Performance Based Analysis of LiNi0.5Co0.2Mn0.3O2Cathode

The Role of Zr Doping in Stabilizing Li[Ni0.6Co0.2Mn0.2]O2 as a Cathode Material for Lithium‐Ion Batteries

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Surface modification of LiNi _0.5 Co _0.2 Mn _0.3 O ₂ cathode materials with Li ₂ O‐B ₂ O ₃ ‐LiBr for lithium‐ion batteries

Surface modification of LiNi _0.5 Co _0.2 Mn _0.3 O ₂ cathode materials with Li ₂ O‐B ₂ O ₃ ‐LiBr for lithium‐ion batteries

Galvanostatic Intermittent Titration and Performance Based Analysis of LiNi_0.5Co_0.2Mn_0.3O₂Cathode

The Role of Zr Doping in Stabilizing Li[Ni_0.6Co_0.2Mn_0.2]O₂ as a Cathode Material for Lithium‐Ion Batteries