Rational design of a self-supporting skeleton decorated with dual lithiophilic Sn-containing and N-doped carbon tubes for dendrite-free lithium metal anodes

Ge, Jiaxiao; Hong, Jie; Liu, Tiancun; Wang, Yong

doi:10.1039/d2ta00601d

Cited by 5 publications

(5 citation statements)

References 39 publications

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“…Furthermore, the XPS results show that there are CO, C–O groups in the ERGO@Cu/PA mesh, with an obvious oxygen doping level. Mukherjee et al and Wang et al , systematically studied the role of structural defects and oxygen-containing groups in the graphene lattice in inducing Li deposition through theoretical calculation and experimental characterization. It is found that Li is preferentially adsorbed to these topological defects in a stable form and acts as a nucleation site for further deposition to induce uniform deposition of Li.…”

Section: Resultsmentioning

confidence: 99%

“…For the bottleneck of uncontrollable Li dendrite, several different strategies were used to suppress dendrite growth and enhance the cycling stability, modifying a strong artificial SEI film on the Li interface as a blocking layer for dendritic growth, − or homogenizing the electric field distributions on an anode interface during Li deposition through modification of the electrolyte or the introduction of additives, − as well as reducing the Li nucleation overpotential and homogenize Li deposition by employing lithiophilic materials. − Besides, the 3D Cu − current collector can inhibit the growth of Li dendrite and effectively alleviate the volume expansion through the combination with Li metal (electrodeposition, melting, and rolling), which improves the cycling stability of the Li metal battery, as well as decreases the excessive use of Li foil to a proper extent, reducing the production cost and security risks.…”

Section: Introductionmentioning

confidence: 99%

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Lightweight and Flexible 3D ERGO@Cu/PA Mesh Current Collector of Li Metal Battery for Dendrite Suppression

Zhang

Zhao

et al. 2023

ACS Appl. Polym. Mater.

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The utilization of 3D Cu current collectors has been approved to be an efficient design to suppress the uncontrolled dendrite growth of Li metal anodes. However, the widely used 3D metallic Cu often has high self-weight and impaired mechanical properties and cannot meet the requirements of high energy density and industrial production. Here, we developed a lightweight, malleable, lithiophilic, and reticular composite Cu-based current collector using a nylon (PA) framework as the 3D substrate, by a synergized approach of combining the conductive Cu/PA with lithiophilic reducing graphene oxide (ERGO) coating. The 3D grid arrangement lowered the regional current density, and the lithiophilic ERGO layer induced Li nucleation, all of which endowed the ERGO@Cu/PA mesh as an anode current collector with attractive performance. The ERGO@Cu/PA composite was applied to display the necessary dendrite-free Li deposition behavior. It delivered an impressive Li plating/stripping behavior and electrochemical performance in half cells and Li/Li symmetric battery tests. The full cell using the ERGO@Cu/PA composite with predeposited Li as the anode and LiFePO4 as the cathode achieved stable cycling and excellent rate performance. Notably, the synergistic combination of light and flexible 3D Cu/PA mesh with lithiophilic ERGO coating proved a valid path to adjust Li anodes in the fields such as flexible wearable devices.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Lightweight and Flexible 3D ERGO@Cu/PA Mesh Current Collector of Li Metal Battery for Dendrite Suppression

Zhang

Zhao

et al. 2023

ACS Appl. Polym. Mater.

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“…Some of the lithiophilic hosts with different heteroatom doping and their corresponding electrochemical performances are presented in Table 1. Single heteroatom doping N-doped carbon substrates are widely used as lithiophilic hosts to guide regular Li deposition [76,77] . In these doped structures, N-containing species such as pyrrolic and pyridinic nitrogen, exhibit strong binding energy with Li + .…”

Section: Heteroatom Doping Of Lithium Hostsmentioning

confidence: 99%

“…; 600 h 1 C; 200 cycles [76] DLCTs N-doped carbon tubes 3 mA•cm -2 ; 3 mAh•cm -2 ; 300 cycles; 99.3% 2 mA•cm -2 ; 2 mAh•cm -2…”

Section: Ngmentioning

confidence: 99%

Engineering of lithiophilic hosts for stable lithium metal anodes

Huang,

Li,

Cui

2024

Energy Mater

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Lithium (Li0) metal has been deemed the desired anode for the future of cutting-edge rechargeable Li batteries benefiting from its lowest reduction potential and ultrahigh theoretical specific capacity. Nevertheless, the large-scale applications of Li metal batteries are restricted by scattered Li dendrite formation and uncontrollable volume expansion. To address these issues, a currently prevalent measure is to use structured lithiophilic hosts for Li metal. The enhanced lithiophilicity of hosts is significant for regulating the Li nucleation barrier. By virtue of these lithiophilic measures, the Li nucleation sites will be well controlled and the Li plating layer will be more stable. Through this article, we classified various lithiophilic hosts and described their applications for Li metal batteries, including heteroatom-doping carbon, lithiophilic-material loading hosts and gradient skeletons. We discussed the inherent advantages and lithophilic mechanisms of these hosts on optimizing the lithophilic properties and analyzed various factors that induced the formation of dendrite Li. Moreover, the review outlines the current challenges and perspectives for Li metal anodes, and some understanding of the lithiophilic chemistry is given.

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“…The above discussion indicates that adjusting the asymmetrical elements in the above space and dynamic factors during phase transitions is key to regulating thermal hysteresis magnitude in practical applications. Doping methods can achieve this goal [39][40][41]. Adding some extra substances might adjust the nucleation and growth processes of the minority phase in the majority phase.…”

mentioning

confidence: 99%

Effective medium theory with hybrid impacts of phase symmetry and asymmetry for analyzing phase transition behavior

Zhou¹,

Lin²,

Yang³

et al. 2023

EPL

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Recent research found a hysteresis phenomenon of electric conductance against metallic phase ratio during the thermally driven metal-insulator transition in the vanadium trioxide system. Profoundly exploring the hysteresis mechanism might help analyze the phase transition behavior. However, there is no complete analytical theory to give a quantitative description. In this work, we developed an effective medium theory to predict the relationships between the effective electric conductance and the metallic phase ratio during warming and cooling processes. It reveals that the above hysteresis is due to the hybrid impacts of phase symmetry and asymmetry in spatial distribution (termed space factor). Then, we applied this theory to deduce the nucleation and growth behavior of the minority phase in the majority phase during phase transition. The predicted relationship between metallic phase ratio and temperature is consistent with the experimental results obtained by scanning microwave impedance microscopy. It shows that the above dynamic behaviors during the warming and cooling processes are asymmetrical (termed dynamic factor). Combining the space and dynamic factors, we summarized the thermal hysteresis mechanism of the metal-insulator transition. Finally, we analyzed the influence of these two factors on the electric conductance difference during the warming and cooling processes. The result indicates that adjusting asymmetrical elements in space and dynamic factors is key to controlling thermal hysteresis magnitude. Since the electric conductance in our theory can be replaced by other physical properties, such as thermal conductivity, dielectric constant, and magnetic permeability, this work might help analyze many different phase transition behaviors.

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Rational design of a self-supporting skeleton decorated with dual lithiophilic Sn-containing and N-doped carbon tubes for dendrite-free lithium metal anodes

Abstract: The commercial application of lithium (Li) metal batteries is hindered by Li dendrite related severe safety issues. Herein, a functional self-supporting skeleton decorated with dual lithiophilic Sn-containing and N-doped carbon...

Cited by 5 publications

References 39 publications

Lightweight and Flexible 3D ERGO@Cu/PA Mesh Current Collector of Li Metal Battery for Dendrite Suppression

Lightweight and Flexible 3D ERGO@Cu/PA Mesh Current Collector of Li Metal Battery for Dendrite Suppression

Engineering of lithiophilic hosts for stable lithium metal anodes

Effective medium theory with hybrid impacts of phase symmetry and asymmetry for analyzing phase transition behavior

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