Effect of Cu doping on the structural and electrochemical properties of lithium-rich Li1.25Mn0.50Ni0.125Co0.125O2 nanopowders as a cathode material

Sorboni, Y. Ghasemian; Arabi, Hadi; Kompany, Ahmad

doi:10.1016/j.ceramint.2018.10.122

Cited by 25 publications

(9 citation statements)

References 52 publications

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“…In addition, substitution of Ni with Cu reduces the amount of Ni 2þ ions and decline the reversible capacity of doped materials. [37] However, cycling stability gradually deteriorates as doping amount increases. Using 0.01 content of Cu, the capacity retention rate of doped material reaches 94.4% after 100 cycles, which is higher than that of NCM622 (90.1%).…”

Section: Resultsmentioning

confidence: 99%

Effects of Various Elements Doping on LiNi_0.6Co_0.2Mn_0.2O₂ Layered Materials for Lithium‐Ion Batteries

Mao

Chen

et al. 2021

Energy Tech

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As lithium-ion batteries (LIBs) have dominated the markets of communication and small devices, and marched into emerging fields such as electric vehicle, urgent requirements in the energy density have promoted ongoing search for cathode materials with high cycle and capability constancy. [1][2][3] Layered oxides LiNi x Co y Mn 1-x-y O 2 (NCM; 0 ≤ x, y, x þ y ≤ 1) of transition metals (TMs) with dense lattice overall possess high specific capacity per unit volume storage, especially for high nickel oxides (with 0.6 ≤ x þ y ≤ 1) that can deliver capacity up to 200 mAh g À1 . [4][5][6] However, these cathode materials still suffer from some drawbacks that limit the energy content of LIBs. For example, the increase in nickel content deteriorates the cycle stability despite improvement in the reversible specific capacity of the materials. [7][8][9] Such limiting factor induces the phase transitions and unavoidable Li þ /Ni 2þ mixing, leading to structural deformation and increased activation disorders. These features would seriously compromise the electrochemical properties of the materials. [10][11][12][13] The improvement of electrochemical properties of LiNi x Co y Mn 1-x-y O 2 materials by doping foreign elements has intensively adopted. For instance, Minsang et al. incorporated Cu into LiNi 1/3 Co 1/3 Mn 1/3 O 2 and found that the presence of Cu may reduce the mixing degree of Li þ /Ni 2þ , suppress the structural transformation, and improve the diffusion rate of Li þ . This, in turn, led to enhanced cycle performance and rate performance. [14] Other studies showed that Ti-doped Li(Ni x Mn x Co 1-2x-y Ti y )O 2 not only increased the energy density but also enhanced the structural stability upon cycling because of the elevated Ti-O bond energy. [15] Chen et al. reported that when F À occupied the O sites in Li-rich layered oxides, cycling stability was enhanced by 94.8% in 50 cycles between 2.0 and 4.8 V. [16] Small amounts of Fe-doped LiNi 1/3 Co 1/3 Mn 1/3 O 2 prepared by simple sol-gel method also displayed slight volume change in the material during Li þ diffusion, resulting in excellent structural stability. [17] In addition, other elements such as Al, [18,19] Cr, [20] Zr, [21,22] and Zn [23,24] have been also explored. Although extrinsic ions introduction can influence the performance of the LiNi x Co y Mn 1-x-y O 2 , it is difficult to evaluate and compare their contribution due to the test standard or preparation strategy, which is different from literature to literature. On the contrary, traditional preparation approaches such as solid-state method may induce uneven doping on host materials due to the loose adhesion and uneven distribution of the dopants. [22,[25][26][27] Motivated by the aforementioned research, herein, a series of metal-doped LiNi 0.6-x Co 0.2 Mn 0.2 M x (M ¼ Cr, Cu, Fe, Sn, and Zn) is synthesized and investigated. Their properties are measured and evaluated under the same condition to better understand their doping effects. In addition, in situ coprecipitation is used in this work to ...

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Section: Resultsmentioning

confidence: 99%

Effects of Various Elements Doping on LiNi_0.6Co_0.2Mn_0.2O₂ Layered Materials for Lithium‐Ion Batteries

Mao

Chen

et al. 2021

Energy Tech

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“…The authors explain the decay in overall capacity by speculating that (1) the Cu 2+ ions occupy Li + sites and inhibit the diffusion of Li + , and (2) the existence of Cu 2+ can cause oxidation of Ni 2+ , which decreases the number of Ni 2+ /Ni 4+ redox couples. However, the electrochemically inactive Cu can stabilize the structure of LRM, resulting in better cycling stability [143]. Zn has pillar effect, helping to improve the rate performance, but the doped LRMs show clear capacity decay with increased Zn content compared to that of pristine materials (Fig.…”

Section: Elemental Substitutionmentioning

confidence: 99%

Understanding and Control of Activation Process of Lithium-Rich Cathode Materials

Lin

Seaby

et al. 2022

Electrochem. Energy Rev.

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Lithium-rich materials (LRMs) are among the most promising cathode materials toward next-generation Li-ion batteries due to their extraordinary specific capacity of over 250 mAh g−1 and high energy density of over 1 000 Wh kg−1. The superior capacity of LRMs originates from the activation process of the key active component Li2MnO3. This process can trigger reversible oxygen redox, providing extra charge for more Li-ion extraction. However, such an activation process is kinetically slow with complex phase transformations. To address these issues, tremendous effort has been made to explore the mechanism and origin of activation, yet there are still many controversies. Despite considerable strategies that have been proposed to improve the performance of LRMs, in-depth understanding of the relationship between the LRMs’ preparation and their activation process is limited. To inspire further research on LRMs, this article firstly systematically reviews the progress in mechanism studies and performance improving attempts. Then, guidelines for activation controlling strategies, including composition adjustment, elemental substitution and chemical treatment, are provided for the future design of Li-rich cathode materials. Based on these investigations, recommendations on Li-rich materials with precisely controlled Mn/Ni/Co composition, multi-elemental substitution and oxygen vacancy engineering are proposed for designing high-performance Li-rich cathode materials with fast and stable activation processes. Graphical abstract The “Troika” of composition adjustment, elemental substitution, and chemical treatment can drive the Li-rich cathode towards stabilized and accelerated activation.

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“…Cu doping in the LIBs has been proved to reduce interfacial resistance, stabilize structure, and improve discharge capacity 55,56 . In SIBs, Cu is also a good dopant for Mn‐based cathodes.…”

Section: Single‐transition Metal Oxidesmentioning

confidence: 99%

“…Ex situ XRD patterns of the Na 1 À x Ni 0.5 Mn 0.5 O 2 ; (right) highlighted pattern of the left figure 36 (copyright 2012 American Chemical Society) discharge capacity. 55,56 In SIBs, Cu is also a good dopant for Mn-based cathodes. In addition to stabilizing structure, Cu can also form a Cu 2+ /Cu 3+ redox pair in the Cudoped layered materials, which can provide more capacities.…”

Section: Doping Modification For Mn-based Transition Metal Oxidesmentioning

confidence: 99%

Recent developments of layered transition metal oxide cathodes for sodium‐ion batteries toward desired high performance

Sun

Pang

et al. 2022

Asia-Pacific J Chem Eng

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With the development of society, sodium-ion batteries (SIBs) attract more and more attention and are expected to be the next generation of daily energy storage devices. Among the previously reported cathode materials for SIBs, the layered transition metal oxides are considered to be the most competitive cathode materials due to their high specific capacities, simple synthesis process, and many similar advantages to the successful Li transition metal oxides in lithium-ion batteries (LIBs). This review summarizes the recent progress of layered transition metal oxide cathode materials for SIBs, which mainly include Mn-based, Ni/Mn-based, Ni/Co/Mn-based, and Ni/Fe/Mn-based layered cathode materials. The remaining challenges and future developments for the layered transition metal oxide cathode materials are also discussed. This review is expected to provide some insights into the development of layered transition metal oxide cathodes for high-performance SIBs.

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Effect of Cu doping on the structural and electrochemical properties of lithium-rich Li1.25Mn0.50Ni0.125Co0.125O2 nanopowders as a cathode material

Cited by 25 publications

References 52 publications

Effects of Various Elements Doping on LiNi_0.6Co_0.2Mn_0.2O₂ Layered Materials for Lithium‐Ion Batteries

Effects of Various Elements Doping on LiNi_0.6Co_0.2Mn_0.2O₂ Layered Materials for Lithium‐Ion Batteries

Understanding and Control of Activation Process of Lithium-Rich Cathode Materials

Recent developments of layered transition metal oxide cathodes for sodium‐ion batteries toward desired high performance

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Effect of Cu doping on the structural and electrochemical properties of lithium-rich Li1.25Mn0.50Ni0.125Co0.125O2 nanopowders as a cathode material

Cited by 25 publications

References 52 publications

Effects of Various Elements Doping on LiNi0.6Co0.2Mn0.2O2 Layered Materials for Lithium‐Ion Batteries

Effects of Various Elements Doping on LiNi0.6Co0.2Mn0.2O2 Layered Materials for Lithium‐Ion Batteries

Understanding and Control of Activation Process of Lithium-Rich Cathode Materials

Recent developments of layered transition metal oxide cathodes for sodium‐ion batteries toward desired high performance

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Effects of Various Elements Doping on LiNi_0.6Co_0.2Mn_0.2O₂ Layered Materials for Lithium‐Ion Batteries

Effects of Various Elements Doping on LiNi_0.6Co_0.2Mn_0.2O₂ Layered Materials for Lithium‐Ion Batteries