Synthesis of lithium rich layered oxides with controllable structures through a MnO2 template strategy as advanced cathode materials for lithium ion batteries

Kong, Sen; Gong, Youning; Liu, Pei; Xiao, Yilin; Qi, Fei; Zhao, Xingzhong

doi:10.1016/j.ceramint.2019.03.231

Cited by 15 publications

(11 citation statements)

References 41 publications

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“…[22][23][24][25][26][27] However, despite these theoretical advantages this family of cathodes has been plagued by low-rate capabilities, and capacity and voltage fade that are related to structural instability, which many previous works have sought to address. [12,[28][29][30][31][32][33][34][35] Recent work has determined one of the possible root causes of these shortcomings is the underlying inhomogeneity of the material. [36] This underlying inhomogeneity of lithium excess chemistries was reported in 1998 by Neudecker et al where (to our knowledge) the first X-Ray Diffraction (XRD) pattern of this class of cobalt-free lithium-rich materials was published.…”

Section: Doi: 101002/advs202300068mentioning

confidence: 99%

The Importance of Structural Uniformity and Chemical Homogeneity in Cobalt‐Free Lithium Excess Nickel Manganese Oxide Cathodes

Burke

Whitacre

2023

Advanced Science

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This study explores the relationships between material quench rate during processing and the resulting structural and electrochemical properties of Li[Ni0.25Li0.167Mn0.583]O2. Samples of this lithium‐rich material are prepared with highly contrasting postfiring cooling methods: a rapid water emersion quench or closed‐door oven cooling. The contrasting approaches result in samples with different structural, chemical, and electrochemical behaviors; after cycling the rapidly quenched material yields greater capacity, greater stability, and initially lower, but more stable voltages than the slower cooled samples. Through the use of scanning tunneling electron microscopy, X‐Ray Diffraction (XRD), and X‐ray photoelectron spectroscopy (XPS) it is demonstrated that rapidly quenched powders are more structurally uniform and chemically homogenous before cycling. By comparing these precycling sample to postcycling samples, it is then examined how this increased structural uniformity and chemical homogeneity leads to the superior electrochemical properties of the rapidly quenched samples.

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Section: Doi: 101002/advs202300068mentioning

confidence: 99%

The Importance of Structural Uniformity and Chemical Homogeneity in Cobalt‐Free Lithium Excess Nickel Manganese Oxide Cathodes

Burke

Whitacre

2023

Advanced Science

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“…These limitations are connected to their underlying mechanistic reactions, chemical and structural evolution [10,18,19]. The limitations are relatively low rate capability caused by poor ionic and poor electronic conductivities of Li2MnO3 components; low initial coulombic efficiency (78-80 %) lower than conventional cathode material or spinel cathode materials caused by cainitial irreversible capacity loss (IRCL); fading (voltage and capacity) due to layer to spinel evolution or structural changes and O redox activity during cycling.…”

Section: Challenges Of Llo Materialsmentioning

confidence: 99%

“…Kong et al, 2019 synthesised cross-linked nanorods and agglomerate microrods structural LLOs cathode materials via two different MnO2 templates strategies (nanowires and nanorods) to control the structure and the particle size of the electrode material which in turn determines the cathodes electrochemical performance. The cross-linked structural material showed a better electrochemical properties compared to agglomerate microrods structural materials because it provides an internal cavity, shorter diffusion length for lithium ions and larger reaction surface [19]. Ma et al, (2019) comparatively studied the coatings of a shell (Li1.2Ni0.13Mn0.54Co0.13O2) on core (LiNi0.8Mn0.1Co0.1O2) via simple and concentration gradient shell (CGS) coating methods.…”

Section: Challenges Of Llo Materialsmentioning

confidence: 99%

Core-shell Architecture Strategy of Improving the Electrochemical Performance of the Li-rich Layered Oxides: A Review

Ajayi

Ajanaku

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Lithium-ion battery (LIB) serves as power supply for suitable electronics and stationary electrical systems (storage) as a result of their outstanding combination of extraordinary densities (power and energy). The cathode constitutes an integral part of LIBs and its property determines the performance of the battery. The layered lithium-rich oxide (LLO) is unique and favourable cathode materials for LIBs as a result of its high capacity compared to conventional cathode materials such as LiNiO2 etc. However, they demonstrate several performance limitations such as low first cycle efficiency and poor cycling stability thus, limiting their practical applications. Therefore, this review discussed a core-shell architecture strategy of enhancing the electrochemical performance of the LLOs materials for LIBs.

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“…111 The lithium-rich layered structure has a high theoretical capacity ( > 250 mA h•g −1 ), but its coulomb efficiency in the first turn is low and its rate performance is poor. 161 Therefore, combining the materials of the two structures to maximize the preponderance and minimize the disadvantages came into being. There is also evidence that they can indeed be recombined.…”

Section: Strategies For High Rate Capacity Performance Improvementmentioning

confidence: 99%

Review—Key Strategies to Increase the Rate Capacity of Cathode Materials for High Power Lithium-Ion Batteries

Sun

Guo

et al. 2020

J. Electrochem. Soc.

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Realizing ultra-fast charge and discharge of lithium-ion batteries (LIBs) is one of the effective ways to promote the popularity of electric vehicles, solve energy and environmental problems. A lot of studies have shown that low conductivity and low lithium-ion diffusivity are the major limiting factors for the rate performance of cathode. However, there is no systematic review on the methods to improve the rate performance of cathode for LIBs. Hence this review ground-breakingly summarizes a series of key strategies and their electrochemical mechanisms to increase the rate capacity of cathode materials. The limiting factors for the development of LIBs fast charging are introduced. It analyzes the working mechanisms of the nanostructure and micronanostructures. The influences of carbon coating with different carbon sources are introduced and compared in detail. The specific mechanisms and research results of surface coating modification and doping strategies in LiFePO 4 , layered structure cathode, and spinel structure cathode are reviewed. Moreover, innovative approaches such as spinel-layered composites preparation, structuralgradient design, and photo-accelerated fast charging are also provided. Finally, some existing challenges and development directions in the future are discussed.

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Synthesis of lithium rich layered oxides with controllable structures through a MnO2 template strategy as advanced cathode materials for lithium ion batteries

Cited by 15 publications

References 41 publications

The Importance of Structural Uniformity and Chemical Homogeneity in Cobalt‐Free Lithium Excess Nickel Manganese Oxide Cathodes

The Importance of Structural Uniformity and Chemical Homogeneity in Cobalt‐Free Lithium Excess Nickel Manganese Oxide Cathodes

Core-shell Architecture Strategy of Improving the Electrochemical Performance of the Li-rich Layered Oxides: A Review

Review—Key Strategies to Increase the Rate Capacity of Cathode Materials for High Power Lithium-Ion Batteries

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