Rheological phase reaction synthesis of Co-doped LiMn2O4 octahedral particles

Yi, Zonghui

doi:10.1007/s10854-016-5120-2

Cited by 8 publications

(3 citation statements)

References 17 publications

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“…They mainly include doping with transition metal ions − and surface coating with a conductive compound and inert materials. − Among them, doping with transition metal ions was found to be the efficient route to improve or enhance the system’s structural stability and electrochemical properties. In this direction, many metal ions have been used as a dopant, namely, Ti, Sc, Cr, Ni, Fe, Co, , Cu, , Zn, Al, and so on. Among the most reported substituent elements, Ni-, Fe-, and Al-doped materials showed improved performance.…”

Section: Introductionmentioning

confidence: 99%

Formation of the Secondary Phase Domain by Multi-Cation Substitution for the Superior Electrochemical Performance of Spinel Cathodes for High-Voltage Li-Ion Batteries

Shivamurthy

Thripuranthaka

Shelke

et al. 2022

ACS Appl. Energy Mater.

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Disorder-structured spinel oxides are opening frontiers for high-capacity/high-voltage cathodes to meet the challenges of independence on cobalt-containing cathodes toward cheap and sustainable energy storage sources in Li-ion batteries (LIBs). In the present work, a series of Co-free materials: LiMn 2-x-y-z Ni x Fe y Al z O 4 (x = 0.8−0.5, y = 0.1−0.25, and z = 0.1−0.25) with spinel/rock salt disordered structures are reported. The refinement studies confirmed that the materials synthesized are of mixed phase, and the I 311 /I 400 peaks ratio confirms that the synthesized materials are stable enough for electrochemical applications. This article addresses the influence of the secondary phase on the electrochemical activity and the reduction of the Mn 3+ ratio to alleviate the Mn dissolution issue for bettered stability. The optimized LiMnNi 0.7 Fe 0.1 Al 0.2 O 4 is appraised as a cathode material in the voltage range between 3.5 and 5 V (vs. Li + /Li) with an initial discharge capacity of 148.7 mA h g −1 at a rate of 1 C. This material showed very good cycling stability with a capacity retention of 79.5% after 1000 cycles. The cyclic voltammetry studies showed that the material can be a potential candidate for 5 V applications.

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Section: Introductionmentioning

confidence: 99%

Formation of the Secondary Phase Domain by Multi-Cation Substitution for the Superior Electrochemical Performance of Spinel Cathodes for High-Voltage Li-Ion Batteries

Shivamurthy

Thripuranthaka

Shelke

et al. 2022

ACS Appl. Energy Mater.

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“…It was reported that the formatted surface structures with more exposing (1 1 1) crystal planes are conductive to effectively reducing Mn dissolution, ensuring stable crystal structure. 31 Diffraction spots at SAED patterns shown in the illustrations of Figs. 6c and d…”

Section: Characterization Of Materialsmentioning

confidence: 99%

Significant Improvement of LiMn<sub>2</sub>O<sub>4</sub> Cathode Capacity by Introducing Trace Ni During Rapid Microwave-induced Solution Combustion

Chen

Wen

et al. 2020

Electrochemistry

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HRTEM image and cycle curves at 5C and 20C of LiMn 1.975 Ni 0.025 O 4 sampleLiMn 2 O 4 cathodes are prepared by a rapid microwave-induced solution combustion method. Their initial discharge capacity is significantly improved by introducing trace Ni. For example, the LiMn 1.975 Ni 0.025 O 4 (LMNO-0.025) cathode releases an initial discharge capacity of 134.1 mAh g −1 at 1 C, even 144.5 mAh g −1 at 0.5 C, which is far higher than of the pristine LiMn 2 O 4 cathode (119.7 mAh g −1 at 1 C) and close to its theoretical capacity of 148.2 mAh g −1 . After 1000 cycles, the capacity retention of the LMNO-0.025 sample reaches 56.53% at 1 C, and it can be presented the higher capacity retentions of 66.79% at 5 C and 66.89% at 20 C. The robust structure stability proved by XRD, SEM and HRTEM data, and the good kinetics testified by CV and EIS data of the Ni-doped material are responsible to improve the high-rate capability and long cycle properties.

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“…Cation doping stabilizes the LMO spinel structure, by reducing the amount of electrochemically active Mn 3+ [40], which is responsible for manganese disproportionate reaction into electrolyte [41]. However, in the case of doped LiMn 2 O 4 a longer cycle life has been noticed at both room and elevated temperature as well, due to lower capacity loss during charge-discharge cycles, because of the more stable unit cell [42,43].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Lithium Manganese Oxide Electrochemical Behavior by Doping and Surface Modifications

Marincaş

Ilea

2021

Coatings

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Lithium manganese oxide is regarded as a capable cathode material for lithium-ion batteries, but it suffers from relative low conductivity, manganese dissolution in electrolyte and structural distortion from cubic to tetragonal during elevated temperature tests. This review covers a comprehensive study about the main directions taken into consideration to supress the drawbacks of lithium manganese oxide: structure doping and surface modification by coating. Regarding the doping of LiMn2O4, several perspectives are studied, which include doping with single or multiple cations, only anions and combined doping with cations and anions. Surface modification approach consists in coating with different materials like carbonaceous compounds, oxides, phosphates and solid electrolyte solutions. The modified lithium manganese oxide performs better than pristine samples, showing improved cyclability, better behaviour at high discharge c-rates and elevated temperate and improves lithium ions diffusion coefficient.

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Rheological phase reaction synthesis of Co-doped LiMn2O4 octahedral particles

Cited by 8 publications

References 17 publications

Formation of the Secondary Phase Domain by Multi-Cation Substitution for the Superior Electrochemical Performance of Spinel Cathodes for High-Voltage Li-Ion Batteries

Formation of the Secondary Phase Domain by Multi-Cation Substitution for the Superior Electrochemical Performance of Spinel Cathodes for High-Voltage Li-Ion Batteries

Significant Improvement of LiMn<sub>2</sub>O<sub>4</sub> Cathode Capacity by Introducing Trace Ni During Rapid Microwave-induced Solution Combustion

Enhancing Lithium Manganese Oxide Electrochemical Behavior by Doping and Surface Modifications

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