Synthesis and electrochemical properties of Ca-doped LiNi0.8Co0.2O2 cathode material for lithium ion battery

Wang, Chi-Wei; Ma, Xinzhi; Cheng, Jinguo; Sun, Jutang; Zhou, Yunhong

doi:10.1007/s10008-006-0150-y

Cited by 11 publications

(6 citation statements)

References 20 publications

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“…It seems that a very fine surface morphology and that the crystal grains 17 18 . In this present work, the broadband located at around 638.69 cm -1 is attributed to the asymmetric stretching modes of MO 6 (M = Ni, Mg, Co and Zn) group 19 . The wavenumber variation of the synthesized samples for different regions are shown in Table 2.…”

Section: R3supporting

confidence: 54%

Structure and Dielectric Studies of LiNi0.92Mg0.02 (M) 0.06O2 (M = Co and Zn) Cathode Materials for Lithium-Ion Batteries

2016

Chem Sci Trans

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At present, the promising cathode materials for lithium ion batteries are layered structure LiCoO 2 and LiNiO 2. The LiCoO 2 (LiNiO 2) have some disadvantages due to structural instability at high temperatures. In the present paper, we discuss the effect of Co, Zn and Mg substitution in LiNiO 2 for cathode materials on structural and electrical properties. The layered structure LiNi 0.92 Mg 0.02 (M) 0.06 O 2 (M = Co and Zn) cathode materials were synthesized by the solid state reaction method at high temperature. The materials were systematically characterized by TG/DTA, XRD, FESEM, FT-IR and electrical impedance spectroscopy (EIS) studies. The synthesized material has configuration temperature is confirmed from thermogravimetry by differential thermal analysis. All the characterizations show that the cathode materials with their Ni compound substituted by Co, Zn and Mg keep a typical α-NaFeO 2 layered structure with 3 R m space group. The FESEM reveals that the particle size of the samples is about 2 to 4 µm. The local cation (Li-O) of the materials is understood from Fourier transform infrared spectroscopy (FT-IR) studies. The electrical conductivity is calculated from the synthesized sample Co content it is found to be 9.26x10-6 S cm-1 at 110 °C temperature is compared to Zn content. The dielectric constant studies are also discussed through impedance spectroscopy.

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Section: R3supporting

confidence: 54%

Structure and Dielectric Studies of LiNi0.92Mg0.02 (M) 0.06O2 (M = Co and Zn) Cathode Materials for Lithium-Ion Batteries

2016

Chem Sci Trans

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“…To the best of our knowledge, there is no report in the literature concerning the effects of Ca substitution on the structural stability and electrochemical properties of Li 2 MnSiO 4 . Thus far, it has been recognized that Ca substitution is beneficial for improving the reversible capacity and structural stability of phosphate and layer cathode materials, such as LiFePO 4 and LiNi 0.8 Co 0.2 O 2 , because of the reduced antisite defect and strengthened structural stability. , Some basic questions remain unanswered, such as how Ca substitution brings about variations in the electronic structure and mitigates structural changes that occur upon charge/discharge at voltages greater than 4.5 V.…”

Section: Introductionmentioning

confidence: 99%

Understanding the Improved Kinetics and Cyclability of a Li₂MnSiO₄ Cathode with Calcium Substitution

Feng

Ding

et al. 2018

Inorg. Chem.

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Limited practical capacity and poor cyclability caused by sluggish kinetics and structural instability are essential aspects that constrain the potential application of LiMnSiO cathode materials. Herein, LiMnCa SiO/C nanoplates are synthesized using a diethylene-glycol-assisted solvothermal method, targeting to circumvent its drawbacks. Compared with the pristine material, the Ca-substituted material exhibits enhanced electrochemical kinetics and improved cycle life performance. In combination with experimental studies and first-principles calculations, we reveal that Ca incorporation enhances electronic conductivity and the Li-ion diffusion coefficient of the Ca-substituted material, and it improves the structural stability by reducing the lattice distortion. It also shrinks the crystal size and alleviates structure collapse to enhance cycling performance. It is demonstrated that Ca can alleviate the two detrimental factors and shed lights on the further searching for suitable dopants.

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“…5). Capacity fading is usually accompanied by an increase in the internal impedance of the battery during cycling [7,15] [5]), in that the formation of nonelectroactive forms of manganese are suppressed. However, it is very different to that observed for CeO 2 , whereby an increase in capacity resulted from suppression of the unwanted oxygen evolution reaction.…”

Section: Discussionmentioning

confidence: 99%

“…We have also compared this behaviour with similar additions of an alkaline earth metal oxide (CaO). The alkaline earth metal hydroxide and/or carbonate help to suppress or minimize the increase in the internal impedance of the battery which occurs during discharge [7].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical characterization of an aqueous lithium rechargeable battery: The effect of CeO2 additions to the MnO2 cathode

Minakshi

Kalaiselvi

Mitchell

2009

Journal of Alloys and Compounds

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractThe effect of CeO 2 additions on an aqueous rechargeable lithium battery has been investigated. The CeO 2 additions (0, 2, 5 wt%) were made to the manganese dioxide (MnO 2 ) cathode of a cell comprising zinc as an anode and an aqueous saturated lithium hydroxide solution as the electrolyte. The CeO 2 enhances the performance of the cell in terms of capacity and resistance to capacity fade with cycling. This effect is only evident after the first charge cycle. The mechanism by which this occurs may be due to suppression of the oxygen evolution reaction during charging. This results in full reversion of the products of discharge (principally Li x MnO 2 ) to MnO 2 during charging, and suppresses the formation of nonrechargeable oxyhydroxides. CeO 2 additions of 2wt. % were found to be most effective, since additions at the 5 wt. % level caused a decrease in capacity during long-term cycling. This could be due to a synchronizing effect. The effect of additions of a rare earth oxide (CeO 2 ) and an alkaline earth oxide (CaO) on the electrochemical behavior of the cell is also compared and discussed.

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Synthesis and electrochemical properties of Ca-doped LiNi0.8Co0.2O2 cathode material for lithium ion battery

Cited by 11 publications

References 20 publications

Structure and Dielectric Studies of LiNi0.92Mg0.02 (M) 0.06O2 (M = Co and Zn) Cathode Materials for Lithium-Ion Batteries

Structure and Dielectric Studies of LiNi0.92Mg0.02 (M) 0.06O2 (M = Co and Zn) Cathode Materials for Lithium-Ion Batteries

Understanding the Improved Kinetics and Cyclability of a Li₂MnSiO₄ Cathode with Calcium Substitution

Electrochemical characterization of an aqueous lithium rechargeable battery: The effect of CeO2 additions to the MnO2 cathode

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Synthesis and electrochemical properties of Ca-doped LiNi0.8Co0.2O2 cathode material for lithium ion battery

Cited by 11 publications

References 20 publications

Structure and Dielectric Studies of LiNi0.92Mg0.02 (M) 0.06O2 (M = Co and Zn) Cathode Materials for Lithium-Ion Batteries

Structure and Dielectric Studies of LiNi0.92Mg0.02 (M) 0.06O2 (M = Co and Zn) Cathode Materials for Lithium-Ion Batteries

Understanding the Improved Kinetics and Cyclability of a Li2MnSiO4 Cathode with Calcium Substitution

Electrochemical characterization of an aqueous lithium rechargeable battery: The effect of CeO2 additions to the MnO2 cathode

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Understanding the Improved Kinetics and Cyclability of a Li₂MnSiO₄ Cathode with Calcium Substitution