Controllable synthesis of micronano-structured LiMnPO4/C cathode with hierarchical spindle for lithium ion batteries

Cao, Yanbing; Xu, Lian; Xie, Xiaoming; Mu, Kunchang; Qi, Xianyue; Xue, Zhichen; Hu, Guorong; Du, Ke; Peng, Zhongdong

doi:10.1016/j.ceramint.2018.11.186

Cited by 15 publications

(8 citation statements)

References 33 publications

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“…Undesirably, the original O3-type layered structure of the Ni-rich cathodes, particularly at the surface/interface location, are susceptible for the irreversible structure degradation resulting mainly from the unfavorable migration of TM ions (cation mixing), [86,87] continuous erosion by the hydrofluoric acid (HF) [88][89][90][91][92] and the formation of stress-induced microcracks, [39,[93][94][95][96][97] as well as the structural instability arising from the moisture. [34,[98][99][100][101][102] These phase distortions are highly detrimental to the Li + /electrons migration across the interface, and consequently lead to the performance deterioration of LIBs.…”

Section: Origins Of Surface/interface Structure Degradationmentioning

confidence: 99%

Surface/Interface Structure Degradation of Ni‐Rich Layered Oxide Cathodes toward Lithium‐Ion Batteries: Fundamental Mechanisms and Remedying Strategies

Liang

Zhang

Zhao

et al. 2019

Adv Materials Inter

164

111

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Nickel‐rich layered transition‐metal oxides with high‐capacity and high‐power capabilities are established as the principal cathode candidates for next‐generation lithium‐ion batteries. However, several intractable issues such as the poor thermal stability and rapid capacity fade as well as the air‐sensitivity particularly for the Ni content over 80% have seriously restricted their broadly practical applications. The properties and nature of the stable surface/interface, where the Li+ shuttles back and forth between the cathode and electrolyte, play a significant role in their ultimate lithium‐storage performance and industrial processability. Thus, tremendous efforts are made to in‐depth understanding of the essential origins of surface/interface structure degradation and efficient surface modification methodologies are intensively explored. The purpose of the contribution is first to provide a comprehensive review of the up‐to‐date mechanisms proposed to rationally elucidate the surface/interface behaviors, and then, focus on recent developed strategies to optimize the surface/interface structure and chemistry including synthetic condition regulation, surface doping, surface coating, dual doping‐coating modification, and concentration‐gradient structure as well as electrolyte additives. Finally, the perspective on future research trends and feasible approaches toward advanced Ni‐rich cathodes with stable surface/interface is presented briefly.

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Section: Origins Of Surface/interface Structure Degradationmentioning

confidence: 99%

Surface/Interface Structure Degradation of Ni‐Rich Layered Oxide Cathodes toward Lithium‐Ion Batteries: Fundamental Mechanisms and Remedying Strategies

Liang

Zhang

Zhao

et al. 2019

Adv Materials Inter

164

111

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“…The images of all samples showed crystalline micro aggregates composed of sub-microparticles, which are in accordance with SEM of pure LiMnPO 4 at 5 μm. 52 Sintering and calcining environments perform an imperative role in structural and surface properties of structured LiCr x Mn 1Àx PO 4 phase. Irregular plate-like structures can be observed resembling the reported data.…”

Section: Scanning Electron Microscopymentioning

confidence: 99%

Synthesis of Cr doped LiMnPO ₄ cathode materials and investigation of their dielectric properties

Bibi

Khan

et al. 2021

Intl J of Energy Research

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Summary Lithium manganese phosphate (LiMnPO4) and a series of chromium‐doped lithium manganese phosphate with variation in Cr content LiCrxMn1−xPO4 (x = 0.03, 0.06, 0.1) were prepared via conventional sol‐gel method and their dielectric properties have been explored as a function of frequency. The structure and morphology were investigated by X‐ray diffraction technique (XRD), Fourier transformed infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) techniques. The influence of frequency upon electrical conductivity as well as di‐electric properties of the as‐synthesized LiCrxMn1−xPO4 materials have been analyzed by dielectric parameters and AC conductivity using impedance analyzer. It was observed that dielectric constant increased with frequency at lower chromium concentration while at higher chromium contents, the dielectric constant was decreased with increasing frequency. Hence, the composition with highest Cr content (ie, x = 0.1) is proved as best material for various applications owing to its lowest AC‐conductivity and lowest dielectric loss. Therefore, it is revealed that chromium doping is quite advantageous for performance of LiMnPO4 in device applications as Cr doped LiMnPO4 unveiled improved dielectric loss.

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“…Among these high voltage cathode materials, olivine structure LiMnPO 4 has the advantages of outstanding safety performance, low price, high energy density, good cycling stability, high potential platform (4.1 V vs Li/Li + ) and so on, which is a potential cathode material for high voltage. [10][11][12][13][14][15][16] Figure 1 shows the microstructure of LiMnPO 4 material in all directions. It can be seen from the figure that polynegative particle group PO 4 3À has tetrahedral microstructure, and P atoms form high strength and shorter bond length P O covalent bond with O atom, which ensures that Li + can be embedded/extruded in a relatively stable crystal structure.…”

Section: Introductionmentioning

confidence: 99%

“…As far as the current research is concerned, the main research direction is LiMnNiO 4 (4.8 V) of spinel structure and LiMnPO 4 (4.1 V), LiCoPO 4 (4.8 V) and LiLiPO 4 (5.2 V) of olivine structure. Among these high voltage cathode materials, olivine structure LiMnPO 4 has the advantages of outstanding safety performance, low price, high energy density, good cycling stability, high potential platform (4.1 V vs Li/Li + ) and so on, which is a potential cathode material for high voltage 10‐16 . Figure 1 shows the microstructure of LiMnPO 4 material in all directions.…”

Section: Introductionmentioning

confidence: 99%

Insight into structural and electrochemical properties of Mg‐doped LiMnPO ₄ /C cathode materials with first‐principles calculation and experimental verification

Chang

Luo

et al. 2021

Intl J of Energy Research

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The LiMnPO 4 material has the advantages of abundant raw materials, safety and environmental protection, low price, high theoretical capacity, high stable working voltage platform and so on, showing great potential in lithium-ion batteries. Dissimilar metal ion doping can essentially improve the electronic conductivity of LiMnPO 4 and the material's charge and discharge performance, which is an ideal method to improve the electrochemical performance of LiMnPO 4 . In this paper, the optimal doping concentration of Mg-doped solid solution material was calculated by first principles. At the same time, the corresponding content of LiMn 1Àx Mg x PO 4 /C cathode material was synthesized by hydrothermal method for experimental verification, so as to prepare the

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Controllable synthesis of micronano-structured LiMnPO4/C cathode with hierarchical spindle for lithium ion batteries

Cited by 15 publications

References 33 publications

Surface/Interface Structure Degradation of Ni‐Rich Layered Oxide Cathodes toward Lithium‐Ion Batteries: Fundamental Mechanisms and Remedying Strategies

Surface/Interface Structure Degradation of Ni‐Rich Layered Oxide Cathodes toward Lithium‐Ion Batteries: Fundamental Mechanisms and Remedying Strategies

Synthesis of Cr doped LiMnPO ₄ cathode materials and investigation of their dielectric properties

Insight into structural and electrochemical properties of Mg‐doped LiMnPO ₄ /C cathode materials with first‐principles calculation and experimental verification

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Controllable synthesis of micronano-structured LiMnPO4/C cathode with hierarchical spindle for lithium ion batteries

Cited by 15 publications

References 33 publications

Surface/Interface Structure Degradation of Ni‐Rich Layered Oxide Cathodes toward Lithium‐Ion Batteries: Fundamental Mechanisms and Remedying Strategies

Surface/Interface Structure Degradation of Ni‐Rich Layered Oxide Cathodes toward Lithium‐Ion Batteries: Fundamental Mechanisms and Remedying Strategies

Synthesis of Cr doped LiMnPO 4 cathode materials and investigation of their dielectric properties

Insight into structural and electrochemical properties of Mg‐doped LiMnPO 4 /C cathode materials with first‐principles calculation and experimental verification

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Synthesis of Cr doped LiMnPO ₄ cathode materials and investigation of their dielectric properties

Insight into structural and electrochemical properties of Mg‐doped LiMnPO ₄ /C cathode materials with first‐principles calculation and experimental verification