Ion diffusion, and hysteresis of magnesium hydride conversion electrode materials

Lv, Yingtong; Zhang, Xiang; Chen, Wei; Ju, Shunlong; Liu, Zhenhua; Ichikawa, Takayuki; Zhang, Tengfei; Xia, Guanglin

doi:10.1016/j.jmst.2023.01.028

Journal of Materials Science & Technology

2023

DOI: 10.1016/j.jmst.2023.01.028

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Ion diffusion, and hysteresis of magnesium hydride conversion electrode materials

Yingtong Lv¹,

Xiang Zhang²,

Wei Chen³

et al.

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Cited by 5 publications

(2 citation statements)

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“…Compositing MgH 2 with oxides, such as Nb 2 O 5 14 or CoO, 15 can reduce the diffusion activation energy of Li + and H − , thus decreasing the charge/discharge hysteresis and improving the cycling stability. Additionally, innovative structural designs, like graphene-loaded MgH 2 16 or composition with vapor-grown carbon nanofiber (VCGF), 11 have been shown to enhance the material conductivity and mitigate volumetric strain.…”

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confidence: 99%

“…Compositing MgH 2 with oxides, such as Nb 2 O 5 14 or CoO, 15 can reduce the diffusion activation energy of Li + and H À , thus decreasing the charge/discharge hysteresis and improving the cycling stability. Additionally, innovative structural designs, like graphene-loaded MgH 2 16 or composition with vapor-grown carbon nanofiber (VCGF), 11 have been shown to enhance the material conductivity and mitigate volumetric strain. Although a reasonable material structure design can significantly improve the battery performance, the complicated preparation processes could increase the cost of battery fabrication, which is not conducive to large-scale preparation and promotion.…”

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confidence: 99%

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Enhancing the cycling performance of MgH₂–LiBH₄ based solid-state batteries via stacking pressure tailoring

Zhuang,

Chen,

et al. 2024

Mater. Adv.

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confidence: 99%

mentioning

confidence: 99%

Enhancing the cycling performance of MgH₂–LiBH₄ based solid-state batteries via stacking pressure tailoring

Zhuang,

Chen,

et al. 2024

Mater. Adv.

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Enhancement of Ionic Transport at the Interface of LLZTO by Using Lithium Borohydride Ammoniates

Wang,

Liu,

Wang

et al. 2024

Advanced Sustainable Systems

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Garnetbased all‐solid‐state electrolytes are promising because of their wide electrochemical window and high ionic conductivity. However, the preparation process for garnet‐based solid‐state electrolytes is complex, requiring a high sintering temperature (>1050 °C) and a long sintering time (>10 h), which results in poor contact with the electrode. In this work, hydride coating modification can effectively improve the interface contact of oxide particles and enhance the ability of ion conduction. Hence, a series of composite electrolytes Li6.4La3Zr1.4Ta0.6O12‐xwt%Li(NH3)0.2BH4 (LLZTO‐xwt%LNB, 0≤x≤30) is synthesized at Room temperature (RT), in which hydrides uniformly coat and fill in the pores of LLZTO to provide lithium‐ion transport channels. At 30 °C, the conductivity of LLZTO‐10wt%Li(NH3)0.2BH4 (LLZTO‐10wt%LNB, 2.3 × 10−4 S cm−1) is four orders higher than pristine untreated LLZTO (8.7 × 10−8 S cm−1), and two orders higher than pristine Li(NH3)0.2BH4 (1.3 × 10−6 S cm−1). The critical current density reaches up to 3 mA cm−2, demonstrating excellent stability against lithium. These strategies positively impact the development and application of solid‐state electrolytes.

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Porous Magnesium Hydride Nanoparticles Uniformly Coated by Mg‐Based Composites toward Advanced Lithium Storage Performance

Gao,

Ju,

Huang

et al. 2024

Small Structures

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Magnesium hydride (MgH2) has been recognized as a promising anode material of lithium‐ion batteries (LIBs) owing to its ultrahigh specific capacity. The low conductivity and the structural pulverization induced by large volume expansion, however, has long limited its practical lithium storage performance. Herein, a series of yolk‐shell‐like structures, composed of porous MgH2 nanoparticles (NPs) decorated with Mg‐based composites through in‐situ solid‐gas reaction using MgH2 as both the reactant and the structural template, have been fabricated and uniformly dispersed on electronically conductive graphene. It could not only physically accommodate the volume change of MgH2 owing to the physical protection of Mg‐based composites and the formation of void space inside MgH2 NPs, but also effectively facilitate the transportation of electrons throughout the whole electrode. Particularly, the uniform decoration of ultrathin Mg(BH4)2 as the shell with thermodynamically favorable intercalation of lithium ions and low kinetic barrier for the lithium‐ion diffusion promotes facile transportation of lithium ions into active MgH2, which, coupled with the porous structure constructed by flexible graphene, effectively improves the ion conductivity of the electrode. The synergistic improvement in electronic and ionic conductivity leads to a high reversible capacity of 1651 mAh g−1 at 200 mA g−1 after 380 cycles.

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Ion diffusion, and hysteresis of magnesium hydride conversion electrode materials

Cited by 5 publications

References 70 publications

Enhancing the cycling performance of MgH₂–LiBH₄ based solid-state batteries via stacking pressure tailoring

Enhancing the cycling performance of MgH₂–LiBH₄ based solid-state batteries via stacking pressure tailoring

Enhancement of Ionic Transport at the Interface of LLZTO by Using Lithium Borohydride Ammoniates

Porous Magnesium Hydride Nanoparticles Uniformly Coated by Mg‐Based Composites toward Advanced Lithium Storage Performance

Contact Info

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Resources

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Ion diffusion, and hysteresis of magnesium hydride conversion electrode materials

Cited by 5 publications

References 70 publications

Enhancing the cycling performance of MgH2–LiBH4 based solid-state batteries via stacking pressure tailoring

Enhancing the cycling performance of MgH2–LiBH4 based solid-state batteries via stacking pressure tailoring

Enhancement of Ionic Transport at the Interface of LLZTO by Using Lithium Borohydride Ammoniates

Porous Magnesium Hydride Nanoparticles Uniformly Coated by Mg‐Based Composites toward Advanced Lithium Storage Performance

Contact Info

Product

Resources

About

Enhancing the cycling performance of MgH₂–LiBH₄ based solid-state batteries via stacking pressure tailoring

Enhancing the cycling performance of MgH₂–LiBH₄ based solid-state batteries via stacking pressure tailoring