scholarly journals The Influence of Micro-Structured Anode Current Collectors in Combination with Highly Concentrated Electrolyte on the Coulombic Efficiency of In-Situ Deposited Li-Metal Electrodes with Different Counter Electrodes

Batteries ◽  
2020 ◽  
Vol 6 (1) ◽  
pp. 20 ◽  
Author(s):  
Fabian Heim ◽  
Tina Kreher ◽  
Kai Peter Birke
Keyword(s):  
Coulombic Efficiency ◽  
Chemical Separation ◽  
Current Collector ◽  
Cycle Performance ◽  
Zinc Alloy ◽  
Counter Electrodes ◽  
Current Collectors ◽  
Copper Zinc ◽  
Two Measures

This paper compares and combines two common methods to improve the cycle performance of lithium metal (Li) electrodes. One technique is to establish a micro-structured current collector by chemical separation of a copper/zinc alloy. Furthermore, the use of a highly concentrated ether-based electrolyte is applied as a second approach for improving the cycling behavior. The influence of the two measures compared with a planar current collector and a 1 M concentrated carbonate-based electrolyte, as well as the combination of the methods, are investigated in test cells both with Li and lithium nickel cobalt manganese oxide (NCM) as counter electrodes. In all cases Li is in-situ plated onto the micro-structured current collectors respectively a planar copper foil without presence of any excess Li before first deposition. In experiments with Li counter electrodes, the effect of a structured current collector is not visible whereas the influence of the electrolyte can be observed. With NCM counter electrodes and carbonate-based electrolyte structured current collectors can improve Coulombic efficiency. The confirmation of this outcome in experiments with highly concentrated ether-based electrolyte is challenging due to high deviations. However, these results indicate, that improvements in Coulombic efficiency achieved by structuring the current collector’s surface and using ether-based electrolyte do not necessarily add up, if both methods are combined in one cell.

Natural Template-Derived 3D Porous Current Collector for Dendrite-free Lithium Metal Battery

NANO ◽  
2020 ◽  
Vol 15 (03) ◽  
pp. 2050033
Author(s):  
Wenyang Zhang ◽  
Jialin Li ◽  
Haixia Chen ◽  
Huixin Jin ◽  
Pan Li ◽  
...  
Keyword(s):  
Coulombic Efficiency ◽  
Three Dimensional ◽  
Current Collector ◽  
High Energy ◽  
Dendrite Growth ◽  
Electrochemical Performances ◽  
Lithium Metal ◽  
Energy Storage Devices ◽  
Molding Process ◽  
Current Collectors

Metallic lithium (Li) is an outstanding anode for high-energy storage devices, but dendrite growth impedes its practical application. Herein, similar to molding process of mooncake, a facile strategy of templated etching has been developed to manufacture three dimensional (3D) current collectors with hierarchical pore structures and biomimetic surfaces derived from natural templates. By using polydimethylsiloxane (PDMS) as duplicate templates, 3D surface morphologies of natural surfaces can be printed on Cu foil, and the resuable templates facilitate mass production. By comparison, the 3D porous current collectors largely improve Li deposition behavior and suppress dendrite growth. They exhibit excellent electrochemical performances: high Coulombic efficiency (CE), long life spans of more than 1000[Formula: see text]h and good cycling performance. The templated etching method overcomes the energy/time-consuming disadvantages of past pore-creating methods and will boost the commercialization of lithium metal batteries.

Micro-Ploughing Process of Copper Current Collector for Lithium-Ion Battery

2011 ◽  
Vol 228-229 ◽  
pp. 309-314
Author(s):  
Xing Xian Tang ◽  
Yong Tang ◽  
Bang Yan Ye ◽  
Long Sheng Lu
Keyword(s):  
Lithium Ion Batteries ◽  
Coulombic Efficiency ◽  
Copper Substrate ◽  
Three Dimensional ◽  
Lithium Ion ◽  
Current Collector ◽  
Cycle Performance ◽  
Active Materials ◽  
Carbon Anodes ◽  
High Coulombic Efficiency

A three-dimensional “fin-groove” composite structure copper current collector was fabricated by micro-ploughing process. 3D and common 2D carbon anodes for lithium- ion batteries were prepared. The electrochemical properties of these electrodes were studied by linear sweep cyclic voltammetry (CV) and charge-discharge (C-D) test. 2D anode showed high contact resistance, high coulombic efficiency but poor cycle performance. In contrast, 3D anode showed the structure superiority in reinforcing bonding force between active materials and copper substrate, improving the conductive environment and alleviating volume changes. It was believed that 3D anode can keep high coulombic efficiency and improve the cycle performance of lithium- ion batteries.

scholarly journals Electrochemical Performance of Hybrid Cationic Aqueous-Based Rechargeable Battery with Different Current Collectors and Electrolytes

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Shang Chen ◽  
Fang Tang ◽  
Ting He ◽  
Huanhuan Zhang ◽  
Shanshan Deng ◽  
...  
Keyword(s):  
Coulombic Efficiency ◽  
Current Collector ◽  
Side Reaction ◽  
Cycling Performance ◽  
X Ray Diffraction ◽  
High Concentration ◽  
Current Collectors ◽  
Cathode Current ◽  
Zinc Foils ◽  
Tafel Curve

Different zinc foils as anode current collectors by electrowinning in various electrolytes with additives were prepared, which were evaluated through X-ray diffraction (XRD), scanning electron microscopy (SEM), float charge, and Tafel curve tests. The effect of different cathode current collectors, electrolytes, and the as-prepared zinc foils as the anode on the coulombic efficiency and the cycling performance of aqueous batteries were investigated. The results indicate that the initial coulombic efficiency and discharge capacity of the battery with 1 mol/L ZnSO4 and 2 mol/L Li2SO4 are 94.31% and 105.7 mAh/g using graphite as the current collector, which are much higher than 68.20% and 71.0 mAh/g using conductive polyethylene, respectively, attributed to the smaller polarization and electrochemical transfer impedance (Rct) of the former. However, the capacity retention of the latter is much higher than that of the former, especially using the high-concentration-lithium-based hybrid electrolyte, of which it is up to 74.63% even after 500 cycles. Moreover, the cycling performance of a battery with as-prepared zinc foil adding thiourea and gelatin into electrolyte during electrowinning is much better than that without additives, which is due to the smaller corrosion rate and side reaction.

MUNTZ METAL

Alloy Digest ◽  
1955 ◽  
Vol 4 (4) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Shear Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
Copper Alloy ◽  
Heat Treating ◽  
Zinc Alloy ◽  
Good Strength ◽  
Copper Zinc

Abstract MUNTZ METAL is a 60-40 copper-zinc alloy having good strength but low ductility. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength. It also includes information on corrosion resistance as well as heat treating, machining, and joining. Filing Code: Cu-25. Producer or source: Copper alloy mills.

NAVAL BRASS

Alloy Digest ◽  
1954 ◽  
Vol 3 (12) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Shear Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
High Strength ◽  
Heat Treating ◽  
Zinc Alloy ◽  
Copper Zinc

Abstract NAVAL BRASS is a copper-zinc alloy, containing 3/4% of tin, having high strength, toughness and resistance to corrosion. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-21. Producer or source: Brass mills.

ANACONDA ALLOY 268

Alloy Digest ◽  
1982 ◽  
Vol 31 (8) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Cold Working ◽  
Heat Treating ◽  
Zinc Alloy ◽  
Wide Range ◽  
Copper Zinc ◽  
Cold Worked

Abstract ANACONDA Alloy 268 is a copper-zinc alloy with excellent cold-working properties; it can be cold worked by all the conventional fabrication processes. Its corrosion resistance is excellent-to-good in most environments. This alloy has a wide range of applications including items such as springs, bathroom fixtures, automotive radiators, lamp sockets and sanitary traps. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-442. Producer or source: Anaconda American Brass Company.

REVERE No. 464

Alloy Digest ◽  
1969 ◽  
Vol 18 (8) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Heat Exchangers ◽  
Heat Treating ◽  
Oil Refinery ◽  
Zinc Alloy ◽  
Refinery Equipment ◽  
Copper Zinc

Abstract Revere No. 464 is a copper-zinc alloy having good strength, toughness, and resistance to corrosion. It is recommended for steam condensers, marine equipment and oil refinery equipment, most especially in the form of sheet and plate, the latter as the heads for condensers and similar heat exchangers. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Cu-204. Producer or source: Revere Copper and Brass Inc..

COPPER ALLOY No. 268

Alloy Digest ◽  
1976 ◽  
Vol 25 (2) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Copper Alloy ◽  
Cold Working ◽  
Heat Treating ◽  
Zinc Alloy ◽  
Good Resistance ◽  
Wide Range ◽  
Copper Zinc ◽  
The Common ◽  
Cold Worked

Abstract Copper Alloy No. 268 is a copper-zinc alloy with excellent cold-working properties and good resistance to corrosion. It can be cold worked by all the common fabrication processes and has a wide range of applications. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-306. Producer or source: Brass mills.

YELLOW BRASS

Alloy Digest ◽  
1956 ◽  
Vol 5 (8) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Shear Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
Cold Working ◽  
Heat Treating ◽  
Zinc Alloy ◽  
Good Corrosion Resistance ◽  
Copper Zinc

Abstract YELLOW BRASS is a copper-zinc alloy having excellent cold working properties with good corrosion resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fatigue. It also includes information on forming, heat treating, machining, and joining. Filing Code: Cu-41. Producer or source: Brass mills.

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