Key strategies for enhancing the cycling stability and rate capacity of LiNi0.5Mn1.5O4 as high-voltage cathode materials for high power lithium-ion batteries

Yi, Ting‐Feng; Mei, Jie; Zhu, Yan‐Rong

doi:10.1016/j.jpowsour.2016.03.070

Cited by 327 publications

(222 citation statements)

References 323 publications

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“…Developing doped high-performance Li-rich material using earth-abundant elements is more desirable and noble metals (such as Ru, Ag, etc. )-free cathodes are some of the most attractive choices used in commercial LIBs [28]. It is well known that Al is abundant and less expensive than many other transition metals, so the Al doped Li-rich material with the substitution of Co 3+ by Al 3+ is expected to be a cathode material with lower cost than other high Co-based Li-rich material.…”

Section: Introductionmentioning

confidence: 99%

Enhanced electrochemical performance of Li-rich low-Co Li1.2Mn0.56Ni0.16Co0.08−x Al x O2 (0≤x≤0.08) as cathode materials

Han

Yang

et al. 2016

Sci. China Mater.

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Layered Li1.2Mn0.56Ni0.16Co0.08−xAlxO2 (0 ≤ x ≤ 0.08) cathode materials were successfully synthesized by a sol-gel method. X-ray diffraction and the refinement data indicate that all materials have typical α-NaFeO2 structure with R-3m space group, and the a-axis has almost no change, but there is a slight decrease in the c lattice parameter as well as the cell volume. Scanning electron microscopy and high resolution transmission electron microscopy prove that all the samples have uniform particle size of about 200-300 nm and smooth surface. The energy-dispersive X-ray spectroscopy mapping shows that aluminum has been homogeneously doped in the Li1.2Mn0.56Ni0.16Co0.08O2 cathode material. The cyclic voltammetry and electrochemical impedance spectroscopy reveal that appropriate Al-doping contributes to the reversible lithium-ion insertion and extraction, and then reduces the electrochemical polarization and charge transfer resistance. Li1.2Mn0.56Ni0.16Co0.08−xAlxO2 (x = 0.05) shows the lowest charge transfer resistance and the highest lithium-ion diffusion coefficient among all the samples. The Li-rich electrodes with low-level Al doping shows a much higher discharge capacity than the pristine one, especially the Li1.2Mn0.56Ni0.16Co0.08−xAlxO2 (x = 0.05) sample, which exhibits greater rate capacity and better fast charge-discharge performance than the other samples. Li1.2Mn0.56Ni0.16Co0.08−xAlxO2 (x = 0.05) also exhibits higher discharge capacity than the pristine one at each cycle at 55°C. These results clearly indicate that the high rate capacity together with a good high rate cycling performance and high-temperature performance of the low-Co Li1.2Mn0.56Ni0.16Co0.08−xAlxO2 (x=0.05) is a promising alternative to next-generation lithium-ion batteries.

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Section: Introductionmentioning

confidence: 99%

Enhanced electrochemical performance of Li-rich low-Co Li1.2Mn0.56Ni0.16Co0.08−x Al x O2 (0≤x≤0.08) as cathode materials

Han

Yang

et al. 2016

Sci. China Mater.

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“…Polarized electrode is typically based on different carbon materials [2]. Lithium-manganese spinel is one the best materials for redox electrode due to high ion and electron conductivity [3]. The disadvantage of these materials is a structure distortion during charge/discharge process.…”

Section: Introductionmentioning

confidence: 99%

Nanostructured Iron-Substituted Lithium-Manganese Spinel as an Electrode Material for Hybrid Electrochemical Capacitor

et al. 2018

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“…High-capacity materials are usually derived from the class of layered oxides [2,3]. The phospho-olivine type LiMPO 4 (M = Co, Mn, Ni) materials [4][5][6] and the spinel type materials LiM x Mn 2-x O 4 (M = Ni, Fe, Cr, Co) [6][7][8][9] belong to the high-voltage materials, the latter showing a higher electronic conductivity than the former [10,11].…”

Section: Introductionmentioning

confidence: 99%

“…Among the group of high-voltage spinels, the nickelsubstituted Mn spinel LiNi x Mn 2-x O 4 (LNMO) is considered to be one of the most promising materials [10,11]. The term LiNi(II) x Mn(III) 1-2x+2δ Mn(IV) 1+x-2δ O 4-δ describes the LNMO system and the possible oxidation stages.…”

Section: Introductionmentioning

confidence: 99%

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Electrolyte-cathode interactions in 5-V lithium-ion cells

Kohs

Kahr

Ahniyaz³

et al. 2017

J Solid State Electrochem

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The electrolyte/electrode interactions on the anode side of a lithium-ion cell and the formation of the solid electrolyte interphase (SEI) have been investigated intensively in the past and are fairly well understood. Present knowledge about the reactions on the cathode side and the resulting cathode electrolyte interphase (CEI) is less detailed. In this study, the electrolyte/electrode interactions on the surface of the high-voltage cathode material LiNi 0.5 Mn 1.5 O 4 (LNMO), both bare and FePO 4 -coated, were investigated. The gases evolving upon first time charging of the system were investigated using a GC/MS combination. The degradation products included THF, dimethyl peroxide, phosphor trifluoride, 1,3-dioxolane and dimethyl difluor silane, formed in the GC's column as its coating reacts with HF from the experiments. Although these substances and their formation are in themselves interesting, the absence of many degradation products which have been mentioned in the existing literature is of equal interest. Our results clearly indicate that coating a cathode material can have a major influence on the amount and composition of the gaseous decomposition products in the formation phase.

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Key strategies for enhancing the cycling stability and rate capacity of LiNi0.5Mn1.5O4 as high-voltage cathode materials for high power lithium-ion batteries

Cited by 327 publications

References 323 publications

Enhanced electrochemical performance of Li-rich low-Co Li1.2Mn0.56Ni0.16Co0.08−x Al x O2 (0≤x≤0.08) as cathode materials

Enhanced electrochemical performance of Li-rich low-Co Li1.2Mn0.56Ni0.16Co0.08−x Al x O2 (0≤x≤0.08) as cathode materials

Nanostructured Iron-Substituted Lithium-Manganese Spinel as an Electrode Material for Hybrid Electrochemical Capacitor

Electrolyte-cathode interactions in 5-V lithium-ion cells

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