Crystalline geometry engineering towards high-energy spinel cathode for lithium-ion batteries

Chen, Zhanjun; Li, Zhuohua; Peng, Yangxi; Wang, Tao; Huang, Zhong; Hu, Chuanyue; Zhao, Ruirui

doi:10.1016/j.jallcom.2022.165798

“…For instance, conventional solid-state synthesis does not allow the control of LNMO particle morphology or surface orientation and always leads to octahedra or truncated octahedra with exposed crystallographic planes of {111} or {100}/{110}, respectively. LNMO with platelet morphology reported in the literature revealed, until now, either {100}/{110} , or {112} ,− crystallographic oriented planes at their surface. Hai et al , have shown that 112-exposed platelets also deliver a lower diffusion coefficient, poor rate capability, and significant self-discharge compared to 111-exposed octahedra.…”

Section: Introductionmentioning

confidence: 86%

Molten Salt Synthesis of Multifaceted Pure-Phase Spinel LiNi_0.5Mn_1.5O₄ Platelets

Oney

¹

,

Olchowka

²

,

Demortière

³

et al. 2023

ACS Appl. Energy Mater.

4

0

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The spinel LiNi0.5Mn1.5O4 is largely studied as a positive electrode material for lithium-ion batteries, but further optimization of its properties is required to enable its commercialization. The superior electrochemical performance of the disordered polymorph of LiNi0.5Mn1.5O4 is limited by its traditional method of synthesis. This solid-state route generates impurities that reduce the specific capacity and results in the formation of octahedral particles with exposed {111} facets, thus limiting exploration of the effects of surface orientation. In this work, we report for the first time the preparation of a disordered impurity-free LiNi0.5Mn1.5O4 with platelet-like morphology via molten salt synthesis. We discovered that these platelets exhibit multiple surface orientations, including {111}, {112}, and six other high-indexed facets, and deliver energy storage performance equivalent to that of their octahedral counterpart. Such an ability to tune primary particle morphology and orientation will open the gate to investigate mechanisms at the individual particle level using spectroscopy and microscopy techniques.

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“…For instance, conventional solid-state synthesis does not allow the control of LNMO particle morphology or surface orientation and always leads to octahedra or truncated octahedra with exposed crystallographic planes of {111} or {100}/{110}, respectively. LNMO with platelet morphology reported in the literature revealed, until now, either {100}/{110} 19,20 or {112} 16,[21][22][23] crystallographic oriented planes at their surface. Hai et al 21,24 have shown that 112-exposed platelets also deliver a lower diffusion co-efficient, poor rate capability, and significant self-discharge compared to 111-exposed octahedra.…”

mentioning

confidence: 87%

Molten Salt Synthesis of Multi-Faceted Pure-Phase Spinel LiNi0.5Mn1.5O4 Platelets

Oney,

Olchowka,

Demortières

et al. 2023

Preprint

0

View full text Add to dashboard Cite

The spinel LiNi0.5Mn1.5O4 is largely studied as a positive electrode material for lithium-ion batteries, but further optimization of its properties are required to enable its commercialization. The superior electrochemical performance of the disordered polymorph of LiNi0.5Mn1.5O4 is limited by its traditional method of synthesis. This solid-state route generates impurities that reduce specific capacity and results in the formation of octahedral particles with exposed {111} facets, thus limiting explo-ration of the effects of surface orientation. In this work, we report for the first time the preparation of a disordered impurity-free LiNi0.5Mn1.5O4 with platelet-like morphology via molten salt synthesis. We discovered that these platelets exhibit multi-ple surface orientations, including {111}, {112} and six other high-indexed facets, and deliver equivalent energy storage performance to their octahedral counterpart. Such ability to tune primary particle morphology and orientation will open the gate to investigate mechanisms at the individual particle level using spectroscopy and microscopy techniques.

show abstract

“…For instance, conventional solid-state synthesis does not allow the control of LNMO particle morphology or surface orientation and always leads to octahedra or truncated octahedra with exposed crystallographic planes of {111} or {100}/{110}, respectively. LNMO with platelet morphology reported in the literature revealed, until now, either {100}/{110} 19,20 or {112} 16,[21][22][23] crystallographic oriented planes at their surface. Hai et al 21,24 have shown that 112-exposed platelets also deliver a lower diffusion coefficient, poor rate capability, and significant self-discharge compared to 111-exposed octahedra.…”

Section: Introductionmentioning

confidence: 95%

Molten Salt Synthesis of Multi-Faceted Pure-Phase Spinel LiNi0.5Mn1.5O4 Platelets

Oney

¹

,

Olchowka

²

,

Demortière

³

et al. 2023

Preprint

0

View full text Add to dashboard Cite

The spinel LiNi0.5Mn1.5O4 is largely studied as a positive electrode material for lithium-ion batteries, but further optimization of its properties are required to enable its commercialization. The superior electrochemical performance of the disordered polymorph of LiNi0.5Mn1.5O4 is limited by its traditional method of synthesis. This solid-state route generates impurities that reduce specific capacity and results in the formation of octahedral particles with exposed {111} facets, thus limiting explo-ration of the effects of surface orientation. In this work, we report for the first time the preparation of a disordered impurity-free LiNi0.5Mn1.5O4 with platelet-like morphology via molten salt synthesis. We discovered that these platelets exhibit multi-ple surface orientations, including {111}, {112} and six other high-indexed facets, and deliver equivalent energy storage performance to their octahedral counterpart. Such ability to tune primary particle morphology and orientation will open the gate to investigate mechanisms at the individual particle level using spectroscopy and microscopy techniques.

show abstract

Crystalline geometry engineering towards high-energy spinel cathode for lithium-ion batteries

Cited by 6 publications

References 42 publications

Molten Salt Synthesis of Multifaceted Pure-Phase Spinel LiNi_0.5Mn_1.5O₄ Platelets

Molten Salt Synthesis of Multifaceted Pure-Phase Spinel LiNi_0.5Mn_1.5O₄ Platelets

Molten Salt Synthesis of Multi-Faceted Pure-Phase Spinel LiNi0.5Mn1.5O4 Platelets

Molten Salt Synthesis of Multi-Faceted Pure-Phase Spinel LiNi0.5Mn1.5O4 Platelets

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Crystalline geometry engineering towards high-energy spinel cathode for lithium-ion batteries

Cited by 6 publications

References 42 publications

Molten Salt Synthesis of Multifaceted Pure-Phase Spinel LiNi0.5Mn1.5O4 Platelets

Molten Salt Synthesis of Multifaceted Pure-Phase Spinel LiNi0.5Mn1.5O4 Platelets

Molten Salt Synthesis of Multi-Faceted Pure-Phase Spinel LiNi0.5Mn1.5O4 Platelets

Molten Salt Synthesis of Multi-Faceted Pure-Phase Spinel LiNi0.5Mn1.5O4 Platelets

Contact Info

Product

Resources

About

Molten Salt Synthesis of Multifaceted Pure-Phase Spinel LiNi_0.5Mn_1.5O₄ Platelets

Molten Salt Synthesis of Multifaceted Pure-Phase Spinel LiNi_0.5Mn_1.5O₄ Platelets