Effect of Si Addition on Mechanical and Electrochemical Properties of Al-Fe-Cu-La Alloy for Current Collector of Lithium Battery

The increasing demand for high-performance current collectors of lithium ion secondary batteries requires that the employed aluminum alloys have better mechanical properties and superior electrochemical performance. The effect of Si addition on the microstructure, tensile and electrochemical performance of Al-Fe-Cu-La alloy was investigated by optical microscopy, X-ray diffraction, scanning electron microscopy, a tensile test, conductivity test and Tafel polarization curve test. Experimental results indicated that Si addition to the Al-Fe-Cu-La alloy helped to refine the longitudinal grain size of the alloy. The Si-containing phase (AlFeSi) nucleated and grew along the surface of the AlFeLa phase. The Si addition to the Al-Fe-Cu-La alloy could greatly increase the tensile strength in the temperature range of −20 °C to 50 °C and improve high temperature stability of the alloy. Also, the addition of Si promoted the formation of the AlFeSi ternary phase, which helped to improve the corrosion resistance of the alloy.

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Assembly of MXene/PP Separator and Its Enhancement for Ni-Rich LiNi0.8Co0.1Mn0.1O2 Electrochemical Performance

Polymers ◽

10.3390/polym12102192 ◽

2020 ◽

Vol 12 (10) ◽

pp. 2192

Author(s):

Qiu-Shi Rao ◽

Song-Yi Liao ◽

Xing-Wen Huang ◽

Yue-Zhu Li ◽

Yi-Dong Liu ◽

...

Keyword(s):

Electrochemical Performance ◽

High Performance ◽

Large Scale ◽

Lithium Ion ◽

Two Dimensional ◽

X Ray Diffraction ◽

X Ray ◽

Ft Ir ◽

Near Future ◽

Spraying Method

In this work, a few-layer MXene is prepared and sprinkled on a commercial polypropylene (PP) separator by a facile spraying method to enhance the electrochemistry of the Ni-rich LiNi0.8Co0.1Mn0.1O2 (NCM811) cathode. Scanning electron microscope (SEM) and X-ray diffraction (XRD) are used to characterize the morphology and structure of MXene. Fourier transform infrared spectroscopy (FT-IR) and a contact angle tester are used to measure the bond structure and surface wettability PP and MXene/PP separator. The effect of the MXene/PP separator on the electrochemical performance of ternary NCM811 material is tested by an electrochemical workstation. The results show that the two-dimensional MXene material could improve the wettability of the separator to the electrolyte and greatly enhance the electrochemical properties of the NCM811 cathode. During 0.5 C current density cycling, the Li/NCM811 cell with MXene/PP separator remains at 166.2 mAh/g after the 100 cycles with ~90.7% retention. The Rct of MXene/PP cell is measured to be ~28.0 Ω. Combining all analyses results related to MXene/PP separator, the strategy by spraying the MXene on commercial PP is considered as a simple, convenient, and effective way to improve the electrochemical performance of the Ni-rich NCM811 cathode and it is expected to achieve large-scale in high-performance lithium-ion batteries in the near future.

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Synthesis, Structure and Diffusion Pathways of Fast Lithium-Ion Conductors in the Polymorphs α- and β-Li8SnP4

Journal of Materials Chemistry A ◽

10.1039/d1ta03021c ◽

2021 ◽

Author(s):

Thomas F Fässler ◽

Stefan Strangmüller ◽

Henrik Eickkhoff ◽

Wilhelm Klein ◽

Gabriele Raudaschl-Sieber ◽

...

Keyword(s):

High Performance ◽

Low Cost ◽

Lithium Ion ◽

Conducting Materials ◽

Increasing Demand ◽

Battery Technology ◽

Lithium Ion Conductors ◽

And Diffusion ◽

Ion Conductors

The increasing demand for a high-performance and low-cost battery technology promotes the search for Li+-conducting materials. Recently, phosphidotetrelates and aluminates were introduced as an innovative class of phosphide-based Li+-conducting materials...

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V2O3/C composite fabricated by carboxylic acid-assisted sol–gel synthesis as anode material for lithium-ion batteries

Journal of Sol-Gel Science and Technology ◽

10.1007/s10971-021-05523-z ◽

2021 ◽

Author(s):

G. S. Zakharova ◽

E. Thauer ◽

A. N. Enyashin ◽

L. F. Deeg ◽

Q. Zhu ◽

...

Keyword(s):

Electrochemical Performance ◽

Lithium Ion Batteries ◽

Sol Gel ◽

Carbon Sources ◽

Lithium Ion ◽

X Ray Diffraction ◽

Electron Microscopies ◽

Transmission Electron ◽

Battery Electrode ◽

Sol Gel Synthesis

AbstractThe potential battery electrode material V2O3/C has been prepared using a sol–gel thermolysis technique, employing vanadyl hydroxide as precursor and different organic acids as both chelating agents and carbon sources. Composition and morphology of resultant materials were characterized by X-ray diffraction, Raman spectroscopy, scanning and transmission electron microscopies, physical sorption, and elemental analysis. Stability and electronic properties of model composites with chemically and physically integrated carbon were studied by means of quantum-chemical calculations. All fabricated composites are hierarchically structured and consist of carbon-covered microparticles assembled of polyhedral V2O3 nanograins with intrusions of amorphous carbon at the grain boundaries. Such V2O3/C phase separation is thermodynamically favored while formation of vanadium (oxy)carbides or heavily doped V2O3 is highly unlikely. When used as anode for lithium-ion batteries, the nanocomposite V2O3/C fabricated with citric acid exhibits superior electrochemical performance with an excellent cycle stability and a specific charge capacity of 335 mAh g−1 in cycle 95 at 100 mA g−1. We also find that the used carbon source has only minor effects on the materials’ electrochemical performance.

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Crystalline and Electrical Properties of Ferroelectric Silver Niobate-tantalate thin Films

MRS Proceedings ◽

10.1557/proc-655-cc11.5.1 ◽

2000 ◽

Vol 655 ◽

Cited By ~ 1

Author(s):

Jung-Hyuk Koh ◽

S.I. Khartsev ◽

Alex Grishin ◽

Vladimir Petrovsky

Keyword(s):

Temperature Stability ◽

Frequency Dispersion ◽

Processing Temperature ◽

High Temperature Stability ◽

X Ray Diffraction ◽

Ferroelectric State ◽

X Ray ◽

Ferroelectric Hysteresis ◽

First Time

AbstractFor the first time AgTa0.38Nb0.62O3 (ATN) films have been grown on the La0.7Sr0.3CoO3 (LSCO)/LaAlO3 single crystal as well as onto Pt80Ir20 (PtIr) polycrystalline substrate. Comprehensive X-ray diffraction analyses reveal epitaxial quality of ATN and LSCO films on the LaAlO3(001) substrate, while ATN/PtIr films have been found to be (001) preferentially oriented. Dielectric spectroscopy performed for ATN films and bulk ceramics in a wide temperature range 77 to 420 K shows the structural monoclinic M1-to-monoclinic M2 phase transition occurs in films at the temperature 60 °C lower than in ceramics. The tracing of the ferroelectric hysteresis P-E loops indicates the ferroelectric state in ATN films at temperatures below 125 K and yields remnant polarization of 0.4 μC/cm2 @ 77 K. Weak frequency dispersion, high temperature stability of dielectric properties as well as low processing temperature of 550 °C make ATN films to be attractive for various applications.

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Self-assembly synthesis of nitrogen-doped mesoporous carbons used as high-performance electrode materials in lithium-ion batteries and supercapacitors

New Journal of Chemistry ◽

10.1039/c7nj02532g ◽

2017 ◽

Vol 41 (21) ◽

pp. 12901-12909 ◽

Cited By ~ 11

Author(s):

Chunfeng Shao ◽

Ziqiang Wang ◽

Errui Wang ◽

Shujun Qiu ◽

Hailiang Chu ◽

...

Keyword(s):

Electrochemical Performance ◽

Lithium Ion Batteries ◽

Self Assembly ◽

High Performance ◽

Electrode Materials ◽

Lithium Ion ◽

Mesoporous Carbons ◽

Nitrogen Doped ◽

First Time ◽

Enhanced Electrochemical Performance

Guanine was, for the first time, used as a nitrogen source during the synthesis of nitrogen-doped porous carbons (NMCs) with enhanced electrochemical performance.

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A conductive thin layer on prepared positive electrodes by vapour reaction printing for high-performance lithium-ion batteries

Journal of Materials Chemistry A ◽

10.1039/c7ta05591a ◽

2017 ◽

Vol 5 (40) ◽

pp. 21214-21222 ◽

Cited By ~ 9

Author(s):

Jinhyeok Ahn ◽

Sukeun Yoon ◽

Seul Gi Jung ◽

Jin-Heong Yim ◽

Kuk Young Cho

Keyword(s):

Electrochemical Performance ◽

Thin Layer ◽

Lithium Ion Batteries ◽

High Performance ◽

Lithium Ion ◽

Positive Electrodes ◽

Pedot Layer

By covering prepared electrodes with a PEDOT layer via VRP, the electrodes exhibited improved electrochemical performance compared to bare electrodes.

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Stress-relieved Si anode on a porous Cu current collector for high-performance lithium-ion batteries

Materials Chemistry and Physics ◽

10.1016/j.matchemphys.2018.10.042 ◽

2019 ◽

Vol 223 ◽

pp. 152-156 ◽

Cited By ~ 3

Author(s):

Sang-Hyun Moon ◽

Si-Jin Kim ◽

Min-Cheol Kim ◽

Jin-Young So ◽

Ji-Eun Lee ◽

...

Keyword(s):

Lithium Ion Batteries ◽

High Performance ◽

Lithium Ion ◽

Current Collector ◽

Si Anode ◽

Cu Current Collector

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Synthesis and Electrochemical Performance of SnO2/Graphene Hybrid Anode for Lithium Ion Batteries

MRS Proceedings ◽

10.1557/opl.2013.1040 ◽

2013 ◽

Vol 1540 ◽

Author(s):

Chia-Yi Lin ◽

Chien-Te Hsieh ◽

Ruey-Shin Juang

Keyword(s):

Electrochemical Performance ◽

Lithium Ion Batteries ◽

Anode Material ◽

High Performance ◽

Coulombic Efficiency ◽

Rate Capability ◽

Lithium Ion ◽

Reversible Capacity ◽

Cycling Performance ◽

Homogeneous Distribution

ABSTRACTAn efficient microwave-assisted polyol (MP) approach is report to prepare SnO2/graphene hybrid as an anode material for lithium ion batteries. The key factor to this MP method is to start with uniform graphene oxide (GO) suspension, in which a large amount of surface oxygenate groups ensures homogeneous distribution of the SnO2 nanoparticles onto the GO sheets under the microwave irradiation. The period for the microwave heating only takes 10 min. The obtained SnO2/graphene hybrid anode possesses a reversible capacity of 967 mAh g-1 at 0.1 C and a high Coulombic efficiency of 80.5% at the first cycle. The cycling performance and the rate capability of the hybrid anode are enhanced in comparison with that of the bare graphene anode. This improvement of electrochemical performance can be attributed to the formation of a 3-dimensional framework. Accordingly, this study provides an economical MP route for the fabrication of SnO2/graphene hybrid as an anode material for high-performance Li-ion batteries.

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LiFePO4-Graphene Composites as High-Performance Cathodes for Lithium-Ion Batteries: The Impact of Size and Morphology of Graphene

Materials ◽

10.3390/ma12060842 ◽

2019 ◽

Vol 12 (6) ◽

pp. 842 ◽

Cited By ~ 5

Author(s):

Yanqing Fu ◽

Qiliang Wei ◽

Gaixia Zhang ◽

Yu Zhong ◽

Nima Moghimian ◽

...

Keyword(s):

Electrochemical Performance ◽

High Performance ◽

Lithium Iron Phosphate ◽

Low Cost ◽

Lithium Ion ◽

Iron Phosphate ◽

Full Potential ◽

Active Materials ◽

Size And Morphology ◽

The Impact

In this work, we investigated three types of graphene (i.e., home-made G, G V4, and G V20) with different size and morphology, as additives to a lithium iron phosphate (LFP) cathode for the lithium-ion battery. Both the LFP and the two types of graphene (G V4 and G V20) were sourced from industrial, large-volume manufacturers, enabling cathode production at low cost. The use of wrinkled and/or large pieces of a graphene matrix shows promising electrochemical performance when used as an additive to the LFP, which indicates that the features of large and curved graphene pieces enable construction of a more effective conducting network to realize the full potential of the active materials. Specifically, compared to pristine LFP, the LFP/G, LFP/G V20, and LFP/G V4 show up to a 9.2%, 6.9%, and 4.6% increase, respectively, in a capacity at 1 C. Furthermore, the LFP combined with graphene exhibits a better rate performance than tested with two different charge/discharge modes. Moreover, from the economic and electrochemical performance view point, we also demonstrated that 1% of graphene content is optimized no matter the capacity calculated, based on the LFP/graphene composite or pure LFP.

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