Electrochemically Dealloyed 3D Porous Copper Nanostructure as Anode Current Collector of Li‐Metal Batteries

Ma, Yuhui; Ma, Xuetian; Bai, Jianming; Xu, Wenqian; Zhong, Hui; Liu, Zhantao; Xiong, Shiqin; Yang, Lufeng; Chen, Hailong

doi:10.1002/smll.202301731

Cited by 15 publications

(7 citation statements)

References 55 publications

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“…At a charge–discharge rate of 5C (Figure a), the specific capacities of MC–MA and CC–CA are 382 and 367 mAh/g, and capacity retention rates are 84.84 and 81.85%, respectively. The slight increase in capacity in the initial stage is attributed to the gradual activation process . When the cycle test rate increases to 10C (Figure b), the specific capacity of MC–MA is 342.3 mAh/g, and the capacity retention rate is 76.96%; the specific capacity of CC–CA is 277.5 mAh/g, and the capacity retention rate is 62.43%.…”

Section: Resultsmentioning

confidence: 96%

“…The slight increase in capacity in the initial stage is attributed to the gradual activation process. 34 When the cycle test rate increases to 10C (Figure 7b), the specific capacity of MC−MA is 342.3 mAh/g, and the capacity retention rate is 76.96%; the specific capacity of CC−CA is 277.5 mAh/g, and the capacity retention rate is 62.43%. The rapid capacity fading at a 10C rate is mainly attributed to the formation of lithium dendrites.…”

Section: Storage Stabilitymentioning

confidence: 98%

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Investigation on the Application of Microporous Current Collector in Ultra-Fast Lithium-Ion Full Battery

Fu,

Zhao,

Wang

et al. 2024

Ind. Eng. Chem. Res.

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The widespread popularity of lithium-ion full batteries (LIFBs) has gradually demonstrated the need for fast charge and discharge. In this article, the application of microporous copper foil current collector (MC) and microporous aluminum foil current collector (MA) prepared by electrolytic etching in ultra-high rate LIFBs was studied. Compared with conventional copper foil current collectors (CC) and aluminum foil current collectors (CA), MC–MA has better electrical performance and safety performance in an ultra-high-rate system. The pore size of MC is mainly distributed in 2–10 μm, and MA is mainly distributed in 1–15 μm. Scanning electron microscope shows that the pore structure on MC–MA is a disordered pore. The formation of micropores weakens mechanical strength and elongation of the current collector. The strength of copper foil before and after pore-forming decreased from 317.77 to 305.21 MPa, and the elongation decreased from 5.4 to 2.26%. The strength of aluminum foil before and after pore-forming decreased from 287.24 to 237.83 MPa, and the elongation decreased from 3.16 to 1.74%. However, there was no significant change in the thickness and areal density before and after pore-forming. The formation of micropores increases the three-dimensional interface contact sites of the current collector, thereby improving adhesion strength and reducing the resistivity of the electrode. However, too many contact interfaces also face more side reactions, which also cause the self-discharge and high-temperature storage of MC–MA (0.033) to be slightly worse than that of CC–CA (0.030). The electrochemical results show that MC–MA has a larger specific capacity, better rate performance, and lower electrochemical impedance. The capacity retentions of MC–MA after 500 cycles at 5C and 10C were 84.81 and 76.96% and CC–CA were 81.85 and 62.43%, respectively. The capacity retentions of MC–MA and CC–CA are 84.20 and 73.78% after 500 cycles at 5C charge and 15C pulse discharge. The cell disassembly found that lithium dendrites were the main cause of the capacity decay. The excellent three-dimensional interface of micropore provides more reaction sites, and two-dimensional surface defects reduce current density distribution and realize uniform distribution of lithium ions at different phase interfaces. The micropore provides stress release space for volume expansion of charge and discharge and improves voltage hysteresis caused by compressive stress at the interface between the current collector and materials coating. In addition, due to pore structure changes in the elastic deformation ability and surface current density distribution of the current collector, the safety performance of LIFBs is improved.

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Section: Resultsmentioning

confidence: 96%

Section: Storage Stabilitymentioning

confidence: 98%

Investigation on the Application of Microporous Current Collector in Ultra-Fast Lithium-Ion Full Battery

Fu,

Zhao,

Wang

et al. 2024

Ind. Eng. Chem. Res.

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“…In the case of lithium metal batteries, interestingly, lithium also deposits on lithiophilic substrates, which tend to dissolve lithium partially or form an alloy with Li, like gold, even though they have an FCC lattice. Cu is among the least favourable substrates due to its reduced Li solubility and FCC structure [127,138,152]. Dealloying from Cu-Zn alloy has been reported using various metals, including chemical treatment [133], and vacuum distillation (due to the reduced vapour pressure of Zn) [132].…”

Section: Metallic Current Collectorsmentioning

confidence: 99%

Strategies to develop stable alkali metal anodes for rechargeable batteries

Sunny,

Suriyakumar,

Sajeevan

et al. 2024

J. Phys. Energy

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Alkali metal anodes are among the most promising candidates for next-generation high-capacity batteries like metal–air, metal–sulphur and all-solid-state metal batteries. The underlying interfacial mechanism of dendrite formation is not yet fully understood, preventing the practical implementation of metal batteries, particularly lithium, despite decades of research. Parallelly, there is an equal significance to the other alkali metal candidates viz sodium and potassium. The major challenges of alkali metal batteries, including dendrite formation, huge volume change, and unstable solid–electrolyte interface, are highlighted. Here, we also present an overview of the recent developments toward improving the anode interfaces. Given the enormous practical potential of alkali metal anodes as next-generation battery electrodes, we discuss some advanced probing techniques that enable a more complete understanding of the complex plating/stripping mechanism. Finally, perspectives and suggestions are provided on the remaining challenges and future directions in alkali metal battery research.

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“…Reducing the quality and thickness of current collectors can lower the weight percentage, thereby increasing the energy density of the battery. − Nanomodification technology is currently widely applied in lightweight and thin current collectors. Ma et al reported a new type of porous copper current collector, which not only effectively slowed the lithium dendrite growth but also had an average thickness of approximately 14 μm and approximately 72% porosity. At 10 mA cm –2 and an areal capacity of 10 mA h cm –2 , cells with a porous Cu current collector could still deliver good cycling stability up to 230 h. Chen et al reported an integrated bidirectional porous Cu (IBP-Cu) current collector with tunable pore volume and size that exhibited high mechanical flexibility and stability, and the Li|IBP-Cu-based symmetric cell exhibited a low and stable polarization voltage of 46 mV for over 4000 h at 1.0 mA cm –2 and 1.0 mAh cm –2 .…”

Section: Current Collectormentioning

confidence: 99%

“…Impressively, the Li/IBP-Cu anode as-fabricated demonstrates an ultralong cycling ability with high Coulombic efficiency of about 100% for 1000 cycles, amazing rate performance, and extraordinary capacity of up to 7.0 mA h cm −2 for deep plating/stripping. Chen and co-workers 56 reported a new type of porous copper collector that can effectively slow down the dendritic growth of lithium. This porous copper foil is manufactured through a simple two-step electrochemical process, where a Cu−Zn alloy is electrodeposited on commercial copper foil, and then Zn is electrochemically dissolved to form a 3D porous structure of Cu.…”

Section: Current Collectormentioning

confidence: 99%

Recent Progress on Nanomodification Applied in Anodes of Rechargeable Li Metal Batteries

Yao,

Li,

Chen

et al. 2023

ACS Appl. Energy Mater.

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Lithium metal anodes (LMAs) are considered one of the most promising anode materials for lithium metal batteries due to their high theoretical specific capacity (3860 mAh g −1 ) and low anode potential (−3.04 V compared to the standard hydrogen potential). However, the further application of lithium metal batteries is hindered by problems such as lithium dendrite growth and volume change of the anode. Fortunately, to address these issues in lithium metal batteries, various applications of nanomodification technologies have been proposed for lithium metal anodes, such as using nanomaterials and constructing nanostructures. These nanomodification technologies have standardized the plating/stripping behavior of lithium, significantly improving the electrochemical performance and lithium morphology of LMAs. This brief review systematically summarizes the latest research progress in LMA nanomodification technology to inhibit lithium dendrite growth. First, the problems of LMAs in practical applications are analyzed. Then, we summarize the forward-looking strategies and the latest research progress based on nanomaterials and nanostructures from the perspectives of current collectors, protection of the interface layer, separators, and all-solid-state lithium batteries. Finally, the future development of nanomodification technology for the protection of lithium metal batteries is summarized and prospected.

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Electrochemically Dealloyed 3D Porous Copper Nanostructure as Anode Current Collector of Li‐Metal Batteries

Cited by 15 publications

References 55 publications

Investigation on the Application of Microporous Current Collector in Ultra-Fast Lithium-Ion Full Battery

Investigation on the Application of Microporous Current Collector in Ultra-Fast Lithium-Ion Full Battery

Strategies to develop stable alkali metal anodes for rechargeable batteries

Recent Progress on Nanomodification Applied in Anodes of Rechargeable Li Metal Batteries

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