Ag-modified hydrogen titanate nanowire arrays for stable lithium metal anode in a carbonate-based electrolyte

Wen, Zhipeng; Wu, Dongzheng; Li, Hang; Lin, Yingxin; Yang, Yang; Zhao, Jinbao

doi:10.1016/j.jechem.2020.05.057

Cited by 19 publications

(6 citation statements)

References 40 publications

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“…Even after cycling for 400 cycles (cycling lifespan of 1600 h), the HHNF electrode could still maintain an ultrahigh CE value of 98.5% and exhibit a comparatively stable CE plot without obvious large fluctuation. In sharp contrast, the Cu substrate displayed a stable CE plot for nearly 100 cycles and exhibited a gradual strong CE fluctuation, which resulted from the appearance and development of dendritic Li metal and the generation of dead Li. , In Figure c, an ultrasmall CE variation of the HHNF electrode could be maintained for 300 cycles when cycled at 1 mA cm –2 , but pristine Cu presented a similar tendency to that at 0.5 mA cm –2 . Meanwhile, as exhibited in Figure d, voltage–capacity curves of the HHNF electrode at the 10th, 70th, and 130th cycle delivered high CE, adequate Li stripping, and small voltage polarization, which further demonstrated a significant reduction in unnecessary Li loss in comparison with that of the Cu electrode (Figure S8).…”

Section: Resultsmentioning

confidence: 93%

Unusual Inside–Outside Li Deposition within Three-Dimensional Honeycomb-like Hierarchical Nitrogen-Doped Framework for a Dendrite-Free Lithium Metal Anode

Liu

Wang

et al. 2021

ACS Appl. Energy Mater.

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Lithium (Li) metal batteries have attracted massive research interest as candidates for a high energy density system. However, the instability and dendrite issue of Li metal have substantially hindered their practical applications. Therefore, we proposed a well-designed three-dimensional honeycomb-like hierarchical nitrogen (N)-doped framework (HHNF) as a matrix for Li deposition. Many Li ions can be distributed and reduced uniformly through the strong adsorption of N-containing functional groups in the HHNF. Metallic Li deposition on the HHNF follows an “inside–outside” mechanism, and the deposited Li spreads evenly on a flat surface when the internal porous space is filled completely. In this work, homogeneous Li deposition and the avoidance of Li dendrite formation are demonstrated by in situ optical microscopy and in situ Raman spectroscopy. The HHNF performs a high and stable Coulombic efficiency (98.5%) within 400 cycles and an ultralong lifespan of 1000 h at 0.5 mA cm–2 with a low potential polarization (23.8 mV) according to the symmetric cell test. In addition, full cells based on HHNF@Li anodes and LiFePO4/sulfur cathodes exhibit outstanding reversible capacities and rate performance (144.1 mAh g–1 for LiFePO4 after 150 cycles and 676.2 mAh g–1 for sulfur after 100 cycles at 0.5 C).

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Section: Resultsmentioning

confidence: 93%

Unusual Inside–Outside Li Deposition within Three-Dimensional Honeycomb-like Hierarchical Nitrogen-Doped Framework for a Dendrite-Free Lithium Metal Anode

Liu

Wang

et al. 2021

ACS Appl. Energy Mater.

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“…The design of the nanoarrays should also fully consider other factors in the battery system, such as the electrolyte, etc. Wen et al 113 carried out the design of nanoarrays based on commercial carbonate-based electrolytes to adapt to the highvoltage window. They prepared Ag@HTO nanoarrays by loading Ag nanoparticles (NPs) onto hydrogen titanate (H 2 Ti 3 O 7 , HTO) nanowire arrays.…”

Section: Nanoarray Of Various Structures Applied To Lmamentioning

confidence: 99%

Review of Nanoarrays in Lithium Metal Anodes

Wang,

Mao,

Huang

et al. 2024

ACS Appl. Nano Mater.

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The energy density of lithium metal batteries (LMBs) is much higher than that of lithium-ion batteries (LIBs). It is considered an effective development for the next generation of lithium batteries. However, the development of LMBs has been limited by the destructive lithium dendrites formed during cycling and the unstable solid electrolyte interface (SEI). Current collectors with nanoarrays, which have been extensively studied in recent years, are effective in improving the cycling stability of LMBs. Here we investigated three mechanisms of action based on different nanoarrays as structural materials for lithium metal anodes (LMAs). First, the common substrates used in the present study are summarized and the advantages and disadvantages of different substrates are elucidated. Second, we classify the different structures of current collector array structures and their mechanisms of action on the behavior of lithium metal deposition. Finally, we review commonly used lithiophilic materials for constructing nanoarrays and analyze the underlying mechanisms by which they provide lithiophilicity. The above three parts systematically summarize the application progress of current collectors with nanoarrays in lithium metal batteries, providing direction and guidance for designing more effective current collectors in the future.

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“… 1 Considering surface redox reaction as the main electron exchange mechanism during cycling, surface properties and nanotube interlayer distances play a significant role in Li + diffusion. Therefore, the presence of dopants like Ag, 8 carbon nanotubes, 9 Sn, 10 and N 11 within TNT’s layered structure improves the Li + mobility and results in higher capacities.…”

Section: Introductionmentioning

confidence: 99%

Electrospun Nanotubular Titania and Polymeric Interfaces for High Energy Density Li-Ion Electrodes

et al. 2023

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In the current study, for the first time, electrospinning of nanotubular structures was developed for Li-ion battery high energy density applications. For this purpose, titania-based nanotubular materials were synthesized and characterized. Before electrospinning with PVDF to obtain a self-standing electrode, the nanotubes were modified to obtain the best charge-transferring structure. In the current study, for the first time, the effects of various thermal treatment temperatures and durations under an Ar-controlled atmosphere were investigated for Li + diffusion. Electrochemical impedance spectroscopy, cyclic voltammograms, and galvanostatic intermittent titration technique showed that the fastest charge transfer kinetics belongs to the sample treated for 10 h. After optimization of electrospinning parameters, a fully nanotube-embedded fibrous structure was achieved and confirmed by scanning electron microscopy and transmission electron microscopy. The obtained flexible electrode was pressed at ambient and 80 °C to improve the fiber volume fraction. Finally, the galvanostatic charge/discharge tests for the electrospun electrode after 100 cycles illustrated that the hot-pressed sample showed the highest capacity. The polymeric network enabled the omission of metallic current collectors, thus increasing the energy density by 14%. The results of electrospun electrodes offer a promising structure for future high-energy applications.

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Ag-modified hydrogen titanate nanowire arrays for stable lithium metal anode in a carbonate-based electrolyte

Cited by 19 publications

References 40 publications

Unusual Inside–Outside Li Deposition within Three-Dimensional Honeycomb-like Hierarchical Nitrogen-Doped Framework for a Dendrite-Free Lithium Metal Anode

Unusual Inside–Outside Li Deposition within Three-Dimensional Honeycomb-like Hierarchical Nitrogen-Doped Framework for a Dendrite-Free Lithium Metal Anode

Review of Nanoarrays in Lithium Metal Anodes

Electrospun Nanotubular Titania and Polymeric Interfaces for High Energy Density Li-Ion Electrodes

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