3D Porous Cu Current Collectors Derived by Hydrogen Bubble Dynamic Template for Enhanced Li Metal Anode Performance

Qiu, Hailong; Tang, Tianyu; Asif, Muhammad; Huang, Xiaoxiao; Hou, Yanglong

doi:10.1002/adfm.201808468

Cited by 136 publications

(86 citation statements)

References 42 publications

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“…When the deposition capacity was further increased to 1, 2, and 3 mAh cm −2 , respectively, the number and the dimension of Li‐dendrites were also increased obviously (see Figure b–d). This observation is also consistent with published data . The poor lithiophilic property and high energy barrier of pure Cu collector always resulted in the uneven Li nucleation and dendrite growth .…”

Section: Resultssupporting

confidence: 93%

“…Before the test, Li with a capacity of 2.0 mAh cm −2 is first plated on working electrodes at the current density of 1.0 mA cm −2 . Excessive lithium on anode is necessary when used to evaluate the long cycle performance of lithium metal batteries since some lithium will react with electrolyte during cycles …”

Section: Resultsmentioning

confidence: 99%

“…However, the “lithiophobic” nature was adverse to the homogeneous Li‐ion flux distribution, which leads to the formation of Li dendrite and hinders its direct application in the LMBs . Therefore, a great deal of efforts have been devoted to developing the lithiophilic surface on Cu foils, such as creating porous structure, and/or modifying the surface with some lipophilic materials, for improving the lithiophilic nature and homogenizing Li‐ion flux distribution, furtherly achieving the stable Li anode . But most published reports always need complex and even expensive equipment, such as chemical vapor deposition furnace or atomic layer deposition equipment.…”

Section: Introductionmentioning

confidence: 99%

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Large‐Scale Modification of Commercial Copper Foil with Lithiophilic Metal Layer for Li Metal Battery

Cui

Zhai

Yang

et al. 2020

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and long cycle life are urgently pursued. [1][2][3][4] However, current lithium-ion batteries (LIBs) have almost reached their theoretical limitation. [5][6][7][8] So, developing novel electrode materials with high energy and power densities as well as long cycle life is of great significance. Li metal electrodes, hailed as "Holy Grail" electrode, show incomparable advantages including high specific capacity (3860 mAh g −1 ) and low electrochemical potential (−3.040 V vs standard hydrogen electrode) and have been considered as the most promising next-generation electrode materials for Li-S, Li-air batteries, and so on. [9][10][11] However, the lithium metal batteries (LMBs) always suffer dendritic Li during the repeated plating/stripping process, which not only causes the formation of lots of "dead Li" and blocks the Li + / electron transportation between the bulk Li and the electrolyte and furtherly results in the low coulombic efficiency (CE) but also is the main culprit in piercing the separator, giving rise to the internal short circuits and finally leading to the serious security risks. [12][13][14] In addition, the unstable solid electrolyte interphase (SEI) is formed repeatedly on the surface of Li metal during the charge-discharge process, which leads to the nonuniform Li ionic flux and further aggravates the growth of dendritic Li as well as depletes the electrolyte. [15][16][17][18] All these disadvantages lead to low CE and poor cyclability and further impede the commercialization of LMBs.In recent years, many attempts have been exerted to eliminate the formation of Li dendrite and enhance the cyclability of LMBs. Fabricating stable intrinsic SEI layer by the liquid electrolyte additives can improve partly the electrochemical performance. [19][20][21][22][23] Similarly, preparing artificial SEI layer with high Young's Modulus on the surface of the Li metal is another common way to suppress the dendrite growth. [24][25][26][27] Modified separator with functional materials for LMBs is also adopted to inhibit the formation of dendritic Li and shows some progress. [28] Solid electrolytes with high Young's modulus have exhibited good resistance to lithium dendrites in previous reports. [29,30] Although some good results are achieved by these strategies, the complicated synthesis process, high cost, great weight or instability during long-term cycle limit their practical applications. More recently, designing 3D collectors with a lithiophilic surface as host for storing Li metal, such as modified 3D Cu foam or Ni foam, shows some progress since large specific area of 3D structure is beneficial to decreasing the local current density and regulating the distribution of electric fieldThe application and development of lithium metal battery are severely restricted by the uncontrolled growth of lithium dendrite and poor cycle stability. Uniform lithium deposition is the core to solve these problems, but it is difficult to be achieved on commercial Cu collectors. In this work, a simple and commercially viable stra...

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Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Large‐Scale Modification of Commercial Copper Foil with Lithiophilic Metal Layer for Li Metal Battery

Cui

Zhai

Yang

et al. 2020

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“…The comparison of the CE of the anode in our work and some reported state-of-the-art anodes tested in the DOL/DME ether electrolyte. References (53)(54)(55)(56)(57)…”

Section: Supplementary Materialsmentioning

confidence: 99%

An ultrastable lithium metal anode enabled by designed metal fluoride spansules

et al. 2020

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The lithium metal anode (LMA) is considered as a promising star for next-generation high-energy density batteries but is still hampered by the severe growth of uncontrollable lithium dendrites. Here, we design “spansules” made of NaMg(Mn)F3@C core@shell microstructures as the matrix for the LMA, which can offer a long-lasting release of functional ions into the electrolyte. By the assistance of cryogenic transmission electron microscopy, we reveal that an in situ–formed metal layer and a unique LiF-involved bilayer structure on the Li/electrolyte interface would be beneficial for effectively suppressing the growth of lithium dendrites. As a result, the spansule-modified anode affords a high Coulombic efficiency of 98% for over 1000 cycles at a current density of 2 mA cm−2, which is the most stable LMA reported so far. When coupling this anode with the Li[Ni0.8Co0.1Mn0.1]O2 cathode, the practical full cell further exhibits highly improved capacity retention after 500 cycles.

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“…NPC materials have been mainly synthesized by electrochemical methods such as dealloying of a copper-containing alloy [31,32] and template-assisted electrodeposition from a copper precur-sor solution. [33,34] The main advantage of such electrosynthesis approaches is a fine-tuning of the nanoporous features like struts and pores by modulating the electrodeposition experimental parameters to produce a porous film desired for a particular application. NPC materials were widely investigated in the field of electrochemical sensors to detect glucose, [35] nitrate, [36] nitrite, [37] oxygen, [38] among others.…”

Section: Introductionmentioning

confidence: 99%

An Electrochemically Synthesized Nanoporous Copper Microsensor for Highly Sensitive and Selective Determination of Glyphosate

et al. 2020

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A nanoporous copper (NPC) film was electrodeposited on a copper microelectrode, and the generated platform was investigated for electrochemical sensing of glyphosate (Glyp). The as-deposited NPC film was highly pure and crystalline according to results of energy dispersive spectroscopy and Xray diffraction experiments, respectively. Scanning electron microscopy images confirm the NPC films possess a highly porous morphology containing dendrite fractals, and the electrodeposition parameters, particularly potential (E d ) and time (t d ), exert a remarkable influence on the structure of the films. Such changes in the NPC morphology with E d and t d were also correlated with the electrochemical behavior investigated by cyclic voltammetry. In the presence of Glyp, the anodic oxidation is facilitated because copper ions diffuse easily through the pores of the NPC film and form a complex with the analyte at the electrode interface. On the other hand, as the amount of copper oxides decreases due to the formation of soluble Cu(II) complex with Glyp, less current is obtained during the reverse scan, allowing a relationship between the decrease in the cathodic current and the Glyp concentration to be established. The optimized NPC-modified Cu microelectrode showed very high sensitivity (14 nA nmol À 1 L), low detection limit (4 nmol L À 1 ), excellent reproducibility, and selective response for Glyp. The applicability of the sensor was demonstrated by detecting Glyp in river water samples.[a] Dr.

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3D Porous Cu Current Collectors Derived by Hydrogen Bubble Dynamic Template for Enhanced Li Metal Anode Performance

Cited by 136 publications

References 42 publications

Large‐Scale Modification of Commercial Copper Foil with Lithiophilic Metal Layer for Li Metal Battery

Large‐Scale Modification of Commercial Copper Foil with Lithiophilic Metal Layer for Li Metal Battery

An ultrastable lithium metal anode enabled by designed metal fluoride spansules

An Electrochemically Synthesized Nanoporous Copper Microsensor for Highly Sensitive and Selective Determination of Glyphosate

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