Sb doping and Sb2O3 coating collaboration to improve the electrochemical performance of LiNi0.5Mn0.5O2 cathode material for lithium ion batteries

Hu, Guorong; Shi, You; Fan, Ju; Cao, Yanbing; Peng, Zhongdong; Zhang, Yinjia; Zhu, Fenlu; Sun, Qian; Xue, Zhichen; Liu, Yanhua; Du, Ke

doi:10.1016/j.electacta.2020.137127

Cited by 18 publications

(7 citation statements)

References 43 publications

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“…Layered lithium nickel manganese oxides (LiNi x Mn 1– x O 2 ) are a promising alternative to commercial LiCoO 2 and ternary materials for use as positive electrode materials in lithium-ion batteries (LIBs). , LiNi x Mn 1– x O 2 cathode materials are expected to possess a theoretical capacity as high as that of LiCoO 2 , at approximately 279 mAh g –1 . This prediction is based on the following assumptions: − (1) Nickel and manganese exist as Ni 2+ and Mn 4+ ions in LiNi x Mn 1– x O 2 , respectively.…”

mentioning

confidence: 99%

Understanding the Stability of LiNi_0.5Mn_0.5O₂ as a Co-Free Positive Electrode

Liu

Zhang

et al. 2022

J. Phys. Chem. Lett.

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To understand the stability of Co-free positive electrode materials, LiNi0.5Mn0.5O2 was synthesized with different amounts of lithium added during calcination. The valence states of the Ni and Mn transition metals of the prepared samples were determined through accurate stoichiometry analyses (via inductively coupled plasma optical emission spectrometry), magnetic moment measurements (via superconducting quantum interference device magnetometry), and element valence analyses (via X-ray spectroscopy in combination with Ar ion etching for depth profiling). Unexpectedly, the Ni and Mn transition metals in the interior and on the surface of the LiNi0.5Mn0.5O2 particles show different electrochemical properties. This clarifies the open questions on the Li deintercalation mechanism in LiNi0.5Mn0.5O2.

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mentioning

confidence: 99%

Understanding the Stability of LiNi_0.5Mn_0.5O₂ as a Co-Free Positive Electrode

Liu

Zhang

et al. 2022

J. Phys. Chem. Lett.

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“…The detailed data processing procedure has been reported in our previous work. [19] c-axis lattice is conducive to Li + extraction/insertion, [17,30] our above findings uncover that the cathodes contain more Mn content, which are accordingly featured with the larger c-axis lattice and show lower Li + diffusion coefficients. To clarify the origin of c-lattice variation with different Mn concentrations, as shown in Figure 3e, the lattice along the c-axis orientation is divided into the slab thickness (S MO2 ) and the inter-slab spacing thickness (I LiO2 ), which are obtained by the oxygen's Wyckoff position (Z ox ) in the 3 R m space group (Table S2, Supporting Information).…”

Section: Resultsmentioning

confidence: 69%

Magnetic Frustration Effect on the Rate Performance of LiNi_0.6Co_0.4−_xMn_xO₂ Cathodes for Lithium‐Ion Batteries

Yan

et al. 2022

Advanced Energy Materials

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Cobalt‐free LiNixMn1−xO2 (NM, x ≥ 0.5) layered oxides are considered to be promising cathode materials for next‐generation lithium‐ion batteries because of exceptionally high capacity and low cost, yet the fundamental role of manganese ions in the NM layered structure and rate performance has not been fully addressed to date. Herein, a series of Ni‐fixed LiNi0.6Co0.4−xMnxO2 (x = 0, 0.1, 0.2, 0.3, and 0.4) systems are employed as cathode materials to investigate the functionality of Mn ions on their structures and electrochemical properties. It is found that contrary to prior reports, the change in the c‐axis lattice parameter is not in close connection with the rate performance of NM cathodes. In particular, superconducting quantum interference device (SQUID) measurements are performed to verify the fact that Mn3+ and Mn4+ ions with high spin states cause severe magnetic frustration in the structures of cathode materials, which profoundly aggravates the Li/Ni ionic disorder and blocks Li+ migration, contributing to inferior rate performance. In addition, Li+ migration hindered by Li/Ni disorder, is theoretically demonstrated by ab initio calculation. This work not only provides fresh insight into the role of Mn in NM layered oxide cathodes but also proposes an effective strategy to resolve their inferior rate performance.

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“…Element doping is an efficacious strategy to enhance the electrochemical properties of cathode materials. Numerous elements have been attempted to dope into LiNi 0.5 Mn 0.5 O 2 , such as Al [29,30], Mg [31], Ba [32], Cu [33], Sb [34], Ti [35], Zr [36], Si [37], Mo [38] and F [39]. All these doping ions can suppress the Li/Ni cation mixing in LiNi 0.5 Mn 0.5 O 2 , and further improve the rate capability, specific capacity, and cycling performance.…”

Section: Layered Mn-based Oxidesmentioning

confidence: 99%

“…Jia et al [42] coated a stable, 10 nm thick, and lithium super conductive Li 2 TiO 3 layer on the surface of LiNi 0.5 Mn 0.5 O 2 , which effectively enhanced the Li + diffusion rate, protected the particle morphologies, and helped to maintain a better structure stability, by reducing side reactions between the cathode materials and liquid electrolytes. In order to further improve the electrochemical properties of LiNi 0.5 Mn 0.5 O 2 , element doping and surface coating were combined, such as Sb-doped and Sb 2 O 3 -coated LiNi 0.5 Mn 0.5 O 2 [34], and Zr-doped and Li 2 ZrO 3 -coated LiNi 0.5 Mn 0.5 O 2 [36]. In these, element doping could enhance structural stability by reducing the degree of Li/Ni cation mixing, while surface coating could efficaciously shield the active material from direct contact with liquid electrolytes, and increase the Li + diffusion rate at the interface between electrode and electrolyte.…”

Section: Layered Mn-based Oxidesmentioning

confidence: 99%

Low-Cost Mn-Based Cathode Materials for Lithium-Ion Batteries

Yi¹,

Liang

Qian³

et al. 2023

Batteries

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Due to a high energy density and satisfactory longevity, lithium-ion batteries (LIBs) have been widely applied in the fields of consumer electronics and electric vehicles. Cathodes, an essential part of LIBs, greatly determine the energy density and total cost of LIBs. In order to make LIBs more competitive, it is urgent to develop low-cost commercial cathode materials. Among all cathode materials, Mn-based cathode materials, such as layered LiNi0.5Mn0.5O2 and Li-rich materials, spinel LiMn2O4 and LiNi0.5Mn1.5O4, olivine-type LiMnPO4 and LiMn0.5Fe0.5PO4, stand out owing to their low cost and high energy density. Herein, from the perspective of industrial application, we calculate the product cost of Mn-based cathode materials, select promising candidates with low cost per Wh, and summarize the structural and electrochemical properties and improvement strategies of these low-cost Mn-based cathode materials. Apart from some common issues for Mn-based cathode materials, such as Jahn–Teller distortions and Mn dissolution, we point out the specific problems of each material and provide corresponding improvement strategies to overcome these drawbacks.

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Sb doping and Sb2O3 coating collaboration to improve the electrochemical performance of LiNi0.5Mn0.5O2 cathode material for lithium ion batteries

Cited by 18 publications

References 43 publications

Understanding the Stability of LiNi_0.5Mn_0.5O₂ as a Co-Free Positive Electrode

Understanding the Stability of LiNi_0.5Mn_0.5O₂ as a Co-Free Positive Electrode

Magnetic Frustration Effect on the Rate Performance of LiNi_0.6Co_0.4−_xMn_xO₂ Cathodes for Lithium‐Ion Batteries

Low-Cost Mn-Based Cathode Materials for Lithium-Ion Batteries

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Sb doping and Sb2O3 coating collaboration to improve the electrochemical performance of LiNi0.5Mn0.5O2 cathode material for lithium ion batteries

Cited by 18 publications

References 43 publications

Understanding the Stability of LiNi0.5Mn0.5O2 as a Co-Free Positive Electrode

Understanding the Stability of LiNi0.5Mn0.5O2 as a Co-Free Positive Electrode

Magnetic Frustration Effect on the Rate Performance of LiNi0.6Co0.4−xMnxO2 Cathodes for Lithium‐Ion Batteries

Low-Cost Mn-Based Cathode Materials for Lithium-Ion Batteries

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Understanding the Stability of LiNi_0.5Mn_0.5O₂ as a Co-Free Positive Electrode

Understanding the Stability of LiNi_0.5Mn_0.5O₂ as a Co-Free Positive Electrode

Magnetic Frustration Effect on the Rate Performance of LiNi_0.6Co_0.4−_xMn_xO₂ Cathodes for Lithium‐Ion Batteries