One-step mechanochemical transformation of bulk pseudo-boehmite into nanosized α-Al2O3

Ma, Huirong; Cen, Shangxu; Yu, Zhongrui; Xing, Xiangyuan; Chen, Jingjing; Wang, Dajian; Dong, Chenlong; Mao, Zhiyong

doi:10.1016/j.ceramint.2022.08.154

Cited by 2 publications

(2 citation statements)

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“…After incorporating pseudo-boehmite into graphite, pseudoboehmite on graphite can be dehydrated and in situ transformed into α-Al 2 O 3 during high-energy ball milling, in which the mechanism of mechanochemical transformation of pseudo-boehmite into nanosized α-Al 2 O 3 has been investigated in our previous work. 27 Compared with the ball-milled graphite (500 nm), the BG/Al 2 O 3 composite displays a particle size of ca. 3 μm, mainly because the dehydration behavior during the phase transformation of pseudo-boehmite into α-Al 2 O 3 can make tiny graphite nanoparticles cohere into secondary microparticles (Figure 1d).…”

Section: Resultsmentioning

confidence: 99%

“…After incorporating pseudo-boehmite into graphite, pseudo-boehmite on graphite can be dehydrated and in situ transformed into α-Al 2 O 3 during high-energy ball milling, in which the mechanism of mechanochemical transformation of pseudo-boehmite into nanosized α-Al 2 O 3 has been investigated in our previous work . Compared with the ball-milled graphite (500 nm), the BG/Al 2 O 3 composite displays a particle size of ca.…”

Section: Resultsmentioning

confidence: 99%

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Incorporating α-Al₂O₃ Nanodots into Expanded Graphite Anodes toward Stable Fast Charging for Lithium-Ion Batteries

Chen

et al. 2023

ACS Appl. Energy Mater.

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High-power lithium-ion batteries place high demands on the fast charging ability of electrode materials, while for the current graphite anode, it suffers from anisotropic and sluggish Li+ transport due to its small interlayer spacing. In addition, the large polarization at low lithiation potential at a high rate leads to Li+ deposition and side reactions of Li with the electrolyte. In this work, α-Al2O3 nanodots incorporated into aggregates of thin-layer graphite have been developed by facile high-energy ball milling of graphite and layer-structured pseudo-boehmite. By optimization, the ball-milled graphite/Al2O3 (BG/Al2O3) manifests a high reversible capacity of 344 mAh g–1 higher than the 98.7 mAh g–1 of graphite after 500 cycles at 1 A g–1 (∼2.7C) and 200 mAh g–1 higher than the 59.6 mAh g–1 of raw graphite at 3 A g–1 after 500 cycles. The wrinkled edges and expanded interlayer spacing generated by high-energy ball milling optimize the Li+ transport and accelerate reaction kinetics, contributing high pseudocapacitance and enabling fast charging ability. The α-Al2O3 nanodots can decrease the side reactions between the electrolyte and graphite electrode, contributing high cyclic stability. This study lays a foundation for the one-step mechanical force chemistry method to prepare highly stable fast-charging graphite anode materials for lithium-ion batteries.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Incorporating α-Al₂O₃ Nanodots into Expanded Graphite Anodes toward Stable Fast Charging for Lithium-Ion Batteries

Chen

et al. 2023

ACS Appl. Energy Mater.

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Influence of Genesis on Mechanochemical Activation and Reactivity of Boehmite Prepared by Thermal and Hydrothermal Transformation of Gibbsite

Greifzu,

Alex,

Kailath

et al. 2024

Metall Mater Trans B

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One-step mechanochemical transformation of bulk pseudo-boehmite into nanosized α-Al2O3

Cited by 2 publications

References 29 publications

Incorporating α-Al₂O₃ Nanodots into Expanded Graphite Anodes toward Stable Fast Charging for Lithium-Ion Batteries

Incorporating α-Al₂O₃ Nanodots into Expanded Graphite Anodes toward Stable Fast Charging for Lithium-Ion Batteries

Influence of Genesis on Mechanochemical Activation and Reactivity of Boehmite Prepared by Thermal and Hydrothermal Transformation of Gibbsite

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One-step mechanochemical transformation of bulk pseudo-boehmite into nanosized α-Al2O3

Cited by 2 publications

References 29 publications

Incorporating α-Al2O3 Nanodots into Expanded Graphite Anodes toward Stable Fast Charging for Lithium-Ion Batteries

Incorporating α-Al2O3 Nanodots into Expanded Graphite Anodes toward Stable Fast Charging for Lithium-Ion Batteries

Influence of Genesis on Mechanochemical Activation and Reactivity of Boehmite Prepared by Thermal and Hydrothermal Transformation of Gibbsite

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Incorporating α-Al₂O₃ Nanodots into Expanded Graphite Anodes toward Stable Fast Charging for Lithium-Ion Batteries

Incorporating α-Al₂O₃ Nanodots into Expanded Graphite Anodes toward Stable Fast Charging for Lithium-Ion Batteries