Ultrathin K2Ti8O17 nanobelts for improving the hydrogen storage kinetics of MgH2

Hu, Song; Zhang, Huanhuan; Yuan, Zhenluo; Wang, Yuhang; Fan, Guangyin; Fan, Yanping; Liu, Baozhong

doi:10.1016/j.jallcom.2021.160571

Cited by 36 publications

(11 citation statements)

References 38 publications

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“…4(a), the onset temperature for hydrogen release for the MgH 2 + 10 wt% Ni 3 Fe/BC composite, MgH 2 + 10 wt% Fe/BC composite, MgH 2 + 10 wt% Ni/BC composite, MgH 2 + 10 wt% BC composite, and pure MgH 2 was 184.5 °C, 202.2 °C, 191.2 °C, 264 °C, and 350 °C, respectively. Compared with the recently reported hydrogen storage materials listed in Table S1,† 46–48 the starting hydrogen release temperature of MgH 2 + 10 wt% Ni 3 Fe/BC is relatively low.…”

Section: Resultsmentioning

confidence: 81%

Ni₃Fe/BC nanocatalysts based on biomass charcoal self-reduction achieves excellent hydrogen storage performance of MgH₂

et al. 2022

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Section: Resultsmentioning

confidence: 81%

Ni₃Fe/BC nanocatalysts based on biomass charcoal self-reduction achieves excellent hydrogen storage performance of MgH₂

et al. 2022

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“…The disappearance of bright spots can be observed in the TEM image of K iv TO ev , confirming the existence of vacancies. 24 The selected-area electron diffraction (SAED) pattern (Figure S2) demonstrates the polycrystalline characteristics of K iv TO ev that can be indexed to the (110) and (020) planes of a monoclinic KTO. 24 The elemental mapping images show the homogeneous distribution of K, Ti, and O in K iv TO ev in Figure 1e.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Design of Layer Structure Metal Oxide Material with Dual-Ion Defects for High-Performance Aqueous Zn Ion Batteries

Li,

Guo,

Cao

et al. 2023

ACS Sustainable Chem. Eng.

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Layer structure metal oxides are promising energy storage materials for rechargeable batteries. However, they are still hindered by insufficient ion storage sites and sluggish ion diffusion kinetics during ion insertion/extraction, leading to unsatisfactory battery performance. Herein, we have successfully designed layer structure metal oxides with regulated dual-ion defects via the ion exchange and annealing processes. As for demonstration, a K iv TO ev @Ti anode with dual-ion defects by incorporating with the interlaminar K vacancies and layer edge O vacancies in layer structure potassium titanate (KTO) was synthesized for Zn ion batteries. The bionic defects in the K iv TO ev @Ti anode are indicated to provide extra space for potent Zn ion storage and enhance the Zn ion diffusion rate. Complete inner layer structure and residual interlayer K ion pillars ensure that the K iv TO ev @Ti anode has highly structural stability and reversible electrochemistry. Therefore, K iv TO ev @Ti delivers a favorable Zn ion storage capability of 179.2 mAh g −1 at 0.05 A g −1 , and a remarkable cycling stability of 82% capacity retention after 5000 cycles at 0.5 A g −1 . The Zn x MnO 2 //K iv TO ev @Ti full cell presents an excellent power/ energy density of 583.5 W kg −1 /97.8 Wh kg −1 , respectively, and maintains a capacity retention of 90% after 5000 cycles. This work can enlighten material engineering for energy storage area.

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“…The apparent activation energy is roughly 30% lower than pure MgH 2 . According to research by Hu et al [ 59 ], the addition of K 2 Ti 8 O 17 can successfully lower the activation energy by 59 kJ/mol.…”

Section: Resultsmentioning

confidence: 99%

Ni0.6Zn0.4O Synthesised via a Solid-State Method for Promoting Hydrogen Sorption from MgH2

2023

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Magnesium hydrides (MgH2) have drawn a lot of interest as a promising hydrogen storage material option due to their good reversibility and high hydrogen storage capacity (7.60 wt.%). However, the high hydrogen desorption temperature (more than 400 °C) and slow sorption kinetics of MgH2 are the main obstacles to its practical use. In this research, nickel zinc oxide (Ni0.6Zn0.4O) was synthesized via the solid-state method and doped into MgH2 to overcome the drawbacks of MgH2. The onset desorption temperature of the MgH2–10 wt.% Ni0.6Zn0.4O sample was reduced to 285 °C, 133 °C, and 56 °C lower than that of pure MgH2 and milled MgH2, respectively. Furthermore, at 250 °C, the MgH2–10 wt.% Ni0.6Zn0.4O sample could absorb 6.50 wt.% of H2 and desorbed 2.20 wt.% of H2 at 300 °C within 1 h. With the addition of 10 wt.% of Ni0.6Zn0.4O, the activation energy of MgH2 dropped from 133 kJ/mol to 97 kJ/mol. The morphology of the samples also demonstrated that the particle size is smaller compared with undoped samples. It is believed that in situ forms of NiO, ZnO, and MgO had good catalytic effects on MgH2, significantly reducing the activation energy and onset desorption temperature while improving the sorption kinetics of MgH2.

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Ultrathin K2Ti8O17 nanobelts for improving the hydrogen storage kinetics of MgH2

Cited by 36 publications

References 38 publications

Ni₃Fe/BC nanocatalysts based on biomass charcoal self-reduction achieves excellent hydrogen storage performance of MgH₂

Ni₃Fe/BC nanocatalysts based on biomass charcoal self-reduction achieves excellent hydrogen storage performance of MgH₂

Design of Layer Structure Metal Oxide Material with Dual-Ion Defects for High-Performance Aqueous Zn Ion Batteries

Ni0.6Zn0.4O Synthesised via a Solid-State Method for Promoting Hydrogen Sorption from MgH2

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Ultrathin K2Ti8O17 nanobelts for improving the hydrogen storage kinetics of MgH2

Cited by 36 publications

References 38 publications

Ni3Fe/BC nanocatalysts based on biomass charcoal self-reduction achieves excellent hydrogen storage performance of MgH2

Ni3Fe/BC nanocatalysts based on biomass charcoal self-reduction achieves excellent hydrogen storage performance of MgH2

Design of Layer Structure Metal Oxide Material with Dual-Ion Defects for High-Performance Aqueous Zn Ion Batteries

Ni0.6Zn0.4O Synthesised via a Solid-State Method for Promoting Hydrogen Sorption from MgH2

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Ni₃Fe/BC nanocatalysts based on biomass charcoal self-reduction achieves excellent hydrogen storage performance of MgH₂

Ni₃Fe/BC nanocatalysts based on biomass charcoal self-reduction achieves excellent hydrogen storage performance of MgH₂