Synthesis of Li1.5Ni0.25Mn0.75O2.5 cathode material via carbonate co-precipitation method and its electrochemical properties

Akhilash, M.; Salini, P. S.; Jalaja, K.; John, Bibin; Mercy, T.D.

doi:10.1016/j.inoche.2020.108434

Cited by 19 publications

(19 citation statements)

References 45 publications

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“…The irregular primary particles agglomerate into a loose and porous structure, favoring easy Li-ion diffusion and electrolyte infiltration into the bulk phase. The smaller particles also allow faster intercalation and deintercalation of Li + in the Li-rich NMO cathode, thus finally instigating better charge and discharge properties, particularly at high rate cycling. , The elemental distribution in the NMO sample was further investigated by energy-dispersive spectroscopy (EDS) elemental mapping. The elemental mapping is displayed in Figure .…”

Section: Resultsmentioning

confidence: 99%

“…After this, the dried powder was mixed with lithium carbonate (Li 2 CO 3 ) and then calcined at 950 °C for 10 h to obtain the final product. Excess Li 2 CO 3 (3%) was added to compensate for its loss at high-temperature heating. , …”

Section: Methodsmentioning

confidence: 99%

“…It is reported that nanometer and submicron particles with a porous structure are conducive to shorten the Li-ion diffusion path and thus enhance the electrochemical performance of the material. , Various methods have been applied to synthesize Li-rich cathode materials, such as the hydroxide co-precipitation method, carbonate co-precipitation method, sol–gel process, combustion reaction, solid-state method, ion-exchange reaction, and microwave heating process. − Among these, the carbonate co-precipitation method has been used as a major synthesis process to get a homogeneous solid solution. A typical co-precipitation method uses ammonia as a chelating agent to control the reaction rate. , However, a critical issue of this method is that ammonia is highly volatile, and a large amount of ammonia-nitrogen wastewater is produced during this process, which leads to severe pollution problems …”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Electrochemical Characterization of a Li-Rich Li_1.17Ni_0.34Mn_0.5O₂Cathode Material for Lithium-Ion Cells

et al. 2022

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Lithium-rich layered cathodes have emerged as fascinating materials for high energy density lithium-ion cells owing to their high working voltage window and specific capacity. Herein, we report a novel high-capacity Lirich cathode material having the composition Li 1.17 Ni 0.34 Mn 0.5 O 2 synthesized through a simple carbonate co-precipitation method without using any chelating agents. Inductively coupled plasma atomic emission spectroscopy (ICP-AES), Xray diffraction (XRD), and field emission scanning electron microscopy (FE-SEM) coupled with energy-dispersive spectroscopy (EDS) were employed to characterize the chemical composition, structure, morphology, and elemental distribution, respectively of the synthesized cathode material. The XRD results revealed a well-defined layered structure, and the SEM images show a porous structure, which is beneficial for electrolyte infiltration and easy lithium-ion diffusion. The material delivered an initial discharge capacity of 250.3 mAhg −1 at C/10 rate and exhibited excellent cycling stability (capacity retentions of >98% at C/10 and >90% at 1C rates at the end of 100 and 200 cycles, respectively). Rate capability studies show that the material delivers discharge capacities of 242.3 mAhg −1 at C/5, 220.1 mAhg −1 at C/2, 183.7 mAhg −1 at 1C, and 131.5 mAhg −1 at 2C rates. The excellent electrochemical performance of this cobalt-free high capacity Li-rich cathode material makes it a promising candidate for high energy density lithium-ion cells.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis and Electrochemical Characterization of a Li-Rich Li_1.17Ni_0.34Mn_0.5O₂Cathode Material for Lithium-Ion Cells

et al. 2022

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“…In this regard, layered lithium-rich mixed transition metal oxides existing as solid solutions between Li[Li 1/3 Mn 2/3 ]O 2 (Li 2 MnO 3 ) and LiMO 2 (M = Mn, Co, and Ni) are considered to be the most prospective contenders for next-generation high-energy LIBs. Lithium manganese rich oxides (LMRO) exhibit higher specific capacities of >250 mAh g –1 as well as energy densities of ∼1000 Wh kg –1 over a wide voltage range owing to the coexistence of the layered LiMO 2 phase (with space group R 3̅ m ) and the Li 2 MnO 3 (having C 2/ m phase). − However, the introduction of LMRO in commercial cells remains hindered by several fatal drawbacks, such as severe capacity and voltage fading during cycling owing to structural instability. The phase transition from layered to spinel structure detrimentally affects the crystal stability when the LMRO cathode is charged to 4.8 V. Surface coating with inert phases and ion doping are the two main strategies adopted to alleviate the capacity and voltage fading of LMRO based cathode materials. − …”

Section: Water Based Binders For Various Cathode Materials In Libsmentioning

confidence: 99%

Aqueous Binders for Cathodes: A Lodestar for Greener Lithium Ion Cells

et al. 2022

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The current technologically advancing society requires the development of economically profitable and efficient electrode fabrication routes for lithium ion cells. Binders play an important role in deciding the performance parameters, viz., energy density, rate capability, and cycle life of lithium ion cells. The present review provides a practical guide for the development of aqueous binder based cathodes for lithium ion (Li-ion) cells. In this review, we first discuss the need for aqueous binders in the production of electrodes, particularly for cathodes in Li-ion cells, summarize the challenges in the fabrication of aqueous binder based cathodes, and then highlight the recent developments in aqueous binder based cathodes, targeting to provide a stepping stone for the development of aqueous binder based cathodes with improved sustainability and enhanced electrochemical performance. Aqueous binders for different generations of cathode materials are reviewed in detail with special emphasis given to commercially employed cathode materials.

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“…To compensate for the lithium loss during the high-temperature calcination, an extra 3 wt % of Li 2 CO 3 was added. 34 The scheme for the synthesis of the cathode material is given in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Lithium-Rich Li_1.17Ni_0.17Co_0.17Mn_0.5O₂ Cathode Material for Lithium-Ion Cells: Effect of Calcination Temperature on Electrochemical Performance

Pillai,

Salini,

John

et al. 2023

Energy Fuels

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High-capacity lithium-rich cathode materials become promising candidates for lithium-ion cells. The crystallinity and structural stability of the cathode materials affect their electrochemical properties. Using a simple carbonate co-precipitation method, we report better electrochemical performance for Li1.17Ni0.17Co0.17Mn0.5O2 (NCMO) cathode material. Herein, we identified 950 °C as the optimum calcination temperature for the NCMO cathode material. The X-ray diffraction and SEM analyses revealed that the material synthesized at a high temperature possesses a well-crystallized layered structure. Electrochemical studies revealed that the cathode material synthesized at 950 °C (NCMO-950) delivered the highest discharge capacity of 240.9 mAhg–1 at C/10 rate. The NCMO-950 material maintained a Coulombic efficiency of ∼100% and capacity retention of 97.9% at the end of 100 cycles at C/10 rate, and the material also exhibited excellent rate performance (delivered a capacity of 142.6 mAhg–1 at 5C). Thus, it can be concluded that calcination temperature significantly impacts the structural stability and electrochemical performance of NCMO.

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Synthesis of Li1.5Ni0.25Mn0.75O2.5 cathode material via carbonate co-precipitation method and its electrochemical properties

Cited by 19 publications

References 45 publications

Synthesis and Electrochemical Characterization of a Li-Rich Li_1.17Ni_0.34Mn_0.5O₂Cathode Material for Lithium-Ion Cells

Synthesis and Electrochemical Characterization of a Li-Rich Li_1.17Ni_0.34Mn_0.5O₂Cathode Material for Lithium-Ion Cells

Aqueous Binders for Cathodes: A Lodestar for Greener Lithium Ion Cells

Lithium-Rich Li_1.17Ni_0.17Co_0.17Mn_0.5O₂ Cathode Material for Lithium-Ion Cells: Effect of Calcination Temperature on Electrochemical Performance

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Synthesis of Li1.5Ni0.25Mn0.75O2.5 cathode material via carbonate co-precipitation method and its electrochemical properties

Cited by 19 publications

References 45 publications

Synthesis and Electrochemical Characterization of a Li-Rich Li1.17Ni0.34Mn0.5O2Cathode Material for Lithium-Ion Cells

Synthesis and Electrochemical Characterization of a Li-Rich Li1.17Ni0.34Mn0.5O2Cathode Material for Lithium-Ion Cells

Aqueous Binders for Cathodes: A Lodestar for Greener Lithium Ion Cells

Lithium-Rich Li1.17Ni0.17Co0.17Mn0.5O2 Cathode Material for Lithium-Ion Cells: Effect of Calcination Temperature on Electrochemical Performance

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Synthesis and Electrochemical Characterization of a Li-Rich Li_1.17Ni_0.34Mn_0.5O₂Cathode Material for Lithium-Ion Cells

Synthesis and Electrochemical Characterization of a Li-Rich Li_1.17Ni_0.34Mn_0.5O₂Cathode Material for Lithium-Ion Cells

Lithium-Rich Li_1.17Ni_0.17Co_0.17Mn_0.5O₂ Cathode Material for Lithium-Ion Cells: Effect of Calcination Temperature on Electrochemical Performance