A 3D free-standing lithiophilic silver nanowire aerogel for lithium metal batteries without lithium dendrites and volume expansion: in operando X-ray diffraction

2019 ◽  
Vol 55 (40) ◽  
pp. 5689-5692 ◽  
Author(s):  
Nutthaphon Phattharasupakun ◽  
Juthaporn Wutthiprom ◽  
Salatan Duangdangchote ◽  
Montree Sawangphruk
Keyword(s):  
Dendritic Growth ◽  
Silver Nanowire ◽  
Lithium Metal ◽  
X Ray Diffraction ◽  
Free Standing ◽  
X Ray ◽  
Lithium Metal Batteries ◽  
Initial Nucleation ◽  
Lithium Dendrites ◽  
In Operando

A 3D free-standing lithiophilic silver nanowire aerogel (AgNWA) can stop the dendritic growth of lithium metal at the initial nucleation process.

In operando X-ray diffraction of lithium–oxygen batteries using an ionic liquid as an electrolyte co-solvent

2017 ◽  
Vol 41 (15) ◽  
pp. 7267-7272 ◽  
Author(s):  
E. Knipping ◽  
C. Aucher ◽  
G. Guirado ◽  
F. Fauth ◽  
L. Aubouy
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Lithium Metal ◽  
X Ray Diffraction ◽  
X Ray ◽  
Chemical Instability ◽  
In Operando ◽  
Lithium Oxygen Batteries

Chemical instability of ionic liquids in the presence of lithium metal leading to spontaneous LiOH formation.

scholarly journals The Synergistic Effects of Alloying on the Performance and Stability of Co3Mo and Co7Mo6 for the Electrocatalytic Hydrogen Evolution Reaction

Hydrogen ◽  
2020 ◽  
Vol 1 (1) ◽  
pp. 11-21
Author(s):  
Youyi Sun ◽  
Alexey Y. Ganin
Keyword(s):  
Hydrogen Evolution ◽  
Synergistic Effects ◽  
Alkaline Media ◽  
Price Of Stability ◽  
X Ray Diffraction ◽  
Free Standing ◽  
X Ray ◽  
Current Decay ◽  
Earth Abundant ◽  
Current Densities

Metal alloys have become a ubiquitous choice as catalysts for electrochemical hydrogen evolution in alkaline media. However, scarce and expensive Pt remains the key electrocatalyst in acidic electrolytes, making the search for earth-abundant and cheaper alternatives important. Herein, we present a facile and efficient synthetic route towards polycrystalline Co3Mo and Co7Mo6 alloys. The single-phased nature of the alloys is confirmed by X-ray diffraction and electron microscopy. When electrochemically tested, they achieve competitively low overpotentials of 115 mV (Co3Mo) and 160 mV (Co7Mo6) at 10 mA cm−2 in 0.5 M H2SO4, and 120 mV (Co3Mo) and 160 mV (Co7Mo6) at 10 mA cm−2 in 1 M KOH. Both alloys outperform Co and Mo metals, which showed significantly higher overpotentials and lower current densities when tested under identical conditions, confirming the synergistic effect of the alloying. However, the low overpotential in Co3Mo comes at the price of stability. It rapidly becomes inactive when tested under applied potential bias. On the other hand, Co7Mo6 retains the current density over time without evidence of current decay. The findings demonstrate that even in free-standing form and without nanostructuring, polycrystalline bimetallic electrocatalysts could challenge the dominance of Pt in acidic media if ways for improving their stability were found.

A Self‐Limited Free‐Standing Sulfide Electrolyte Thin Film for All‐Solid‐State Lithium Metal Batteries

2021 ◽  
pp. 2101985
Author(s):  
Gao‐Long Zhu ◽  
Chen‐Zi Zhao ◽  
Hong‐Jie Peng ◽  
Hong Yuan ◽  
Jiang‐Kui Hu ◽  
...  
Keyword(s):  
Thin Film ◽  
Solid State ◽  
Lithium Metal ◽  
Free Standing ◽  
Lithium Metal Batteries

scholarly journals The Texture and Structure of the Melt-Spun Co2MnAl-Type Heusler Alloy

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 501
Author(s):  
Pavel Diko ◽  
Viktor Kavečanský ◽  
Tomáš Ryba ◽  
Lucia Frolová ◽  
Rastislav Varga ◽  
...  
Keyword(s):  
Heusler Alloy ◽  
Dendritic Growth ◽  
Single Phase ◽  
Cellular Growth ◽  
Inhomogeneous Distribution ◽  
X Ray Diffraction ◽  
X Ray ◽  
Melt Spun ◽  
Wheel Side ◽  
Electron Back Scattered Diffraction

The structure of the Co2MnAl-type Heusler alloy in the form of a melt-spun ribbon was studied by electron microscopy, electron back-scattered diffraction (EBSD), and X-ray diffraction. The melt-spun ribbon consists of a homogeneous single-phase disordered Heusler alloy at the wheel side of the ribbon and an inhomogeneous single-phase alloy, formed by cellular or dendritic growth, at the free surface of the ribbon. Cellular growth causes the formation of an inhomogeneous distribution of the elemental constituents, with a higher Co and Al concentration in the centre of the cells or dendritic arms and a higher concentration of Mn at the cell boundaries. The EBSD analysis shows that the columnar crystals grow in the <111> crystal direction and are declined by about 10° against the direction of the spinning.

Creep and Anisotropy of Free-Standing Lithium Metal Foils in an Industrial Dry Room

2021 ◽  
pp. 1-32
Author(s):  
Lara Dienemann ◽  
Anil Saigal ◽  
Michael A Zimmerman
Keyword(s):  
Mechanical Properties ◽  
Solid State ◽  
High Volume ◽  
Dominant Mode ◽  
Lithium Metal ◽  
Free Standing ◽  
Metal Anode ◽  
Lithium Metal Batteries ◽  
Lithium Metal Anode ◽  
Solid State Batteries

Abstract Commercialization of energy-dense lithium metal batteries relies on stable and uniform plating and stripping on the lithium metal anode. In electrochemical-mechanical modeling of solid-state batteries, there is a lack of consideration of specific mechanical properties of battery-grade lithium metal. Defining these characteristics is crucial for understanding how lithium ions plate on the lithium metal anode, how plating and stripping affect deformation of the anode and its interfacing material, and whether dendrites are suppressed. Recent experiments show that the dominant mode of deformation of lithium metal is creep. This study measures the time and temperature dependent mechanics of two thicknesses of commercial lithium anodes inside an industrial dry room, where battery cells are manufactured at high volume. Furthermore, a directional study examines the anisotropic microstructure of 100 µm thick lithium anodes and its effect on bulk creep mechanics. It is shown that these lithium anodes undergo plastic creep as soon as a coin cell is manufactured at a pressure of 0.30 MPa, and achieving thinner lithium foils, a critical goal for solid-state lithium batteries, is correlated to anisotropy in both lithium's microstructure and mechanical properties.

Understanding the lithium dendrites growth in garnet-based solid-state lithium metal batteries

2022 ◽  
Vol 521 ◽  
pp. 230921
Author(s):  
Yuncai Chen ◽  
Yidong Jiang ◽  
Shang-Sen Chi ◽  
Haw Jiunn Woo ◽  
Kai Yu ◽  
...  
Keyword(s):  
Solid State ◽  
Lithium Metal ◽  
Lithium Metal Batteries ◽  
Lithium Dendrites ◽  
Dendrites Growth
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