Insights from Lithium Stripping Dynamics on Fast Charging

2022 ◽  
Author(s):  
Sobana Perumaram Rangarajan ◽  
Partha P Mukherjee ◽  
Yevgen Barsukov ◽  
Conner Fear ◽  
Gayatri Dadheech ◽  
...  
Keyword(s):  
Graphite Electrode ◽  
Lithium Ion ◽  
Visualization Method ◽  
Physical Mechanisms ◽  
S Factor ◽  
Fast Charging ◽  
In Situ Visualization ◽  
Voltage Plateau ◽  
A Charge

Safe and reliable fast charging of lithium-ion batteries is contingent upon the development of facile methods of detection and quantification of lithium plating. Among the leading candidates for online lithium plating detection is analysis of the voltage plateau observed during the rest or discharge phase ensuing a charge. In this work, an operando metric, ‘S-factor,’ is developed from electrochemical data to quantitatively analyze the severity of lithium plating over a range of charge rates and temperatures. An in-situ visualization method is employed to study the physical mechanisms and phase transitions occurring at the graphite electrode during the voltage plateau.

scholarly journals 4D street view: a video-based visualization method

2020 ◽  
Vol 6 ◽  
pp. e305
Author(s):  
Akira Kageyama ◽  
Naohisa Sakamoto
Keyword(s):  
Data Collection ◽  
Visualization Method ◽  
Street View ◽  
Dimensional Spacetime ◽  
In Situ Visualization

We propose a new visualization method for massive supercomputer simulations. The key idea is to scatter multiple omnidirectional cameras to record the simulation via in situ visualization. After the simulations are complete, researchers can interactively explore the data collection of the recorded videos by navigating along a path in four-dimensional spacetime. We demonstrate the feasibility of this method by applying it to three different fluid and magnetohydrodynamics simulations using up to 1,000 omnidirectional cameras.

In Situ Measurement of Lithium-Ion Cell Internal Temperatures during Extreme Fast Charging

2019 ◽  
Vol 166 (14) ◽  
pp. A3254-A3259 ◽  
Author(s):  
Shan Huang ◽  
Xianyang Wu ◽  
Gabriel M. Cavalheiro ◽  
Xiaoniu Du ◽  
Bangzhi Liu ◽  
...  
Keyword(s):  
Lithium Ion ◽  
In Situ Measurement ◽  
Lithium Ion Cell ◽  
Fast Charging

Fast and Extensive Intercalation Chemistry in Wadsley-Roth Phase Based High-Capacity Electrodes

2020 ◽  
Author(s):  
Miao Wang ◽  
Zhenpeng Yao ◽  
Qianqian Li ◽  
Yongfeng Hu ◽  
Jing Zhang ◽  
...  
Keyword(s):  
High Capacity ◽  
Lithium Ion ◽  
High Energy ◽  
Ex Situ ◽  
Fast Diffusion ◽  
Fast Kinetics ◽  
Fast Charging ◽  
Depth Study ◽  
Insertion Sites

<p>Wadsley-Roth (W-R) structured oxides featured with wide channels represent one of the most promising material families showing compelling rate performance for lithium ion batteries. But the structural origin for the fast kinetics of W-R structures is not well understood. Herein, we report an in-depth study on the fast and extensive intercalation chemistry of phosphorus stabilized W-R phase PNb<sub>9</sub>O<sub>25 </sub>and its application in high energy and fast-charging devices. We explore the intercalation geometry of PNb<sub>9</sub>O<sub>25</sub> and identify two geometrical types of stable insertion sites with the total amount (2.22 per Nb ion) much higher than conventional intercalation-type electrodes. We reveal the ion transportation kinetics that the Li ions initially diffuse along the open type III channels and then penetrate to type-α edge sites with low kinetic barriers. Through <i>in-situ</i> TEM and <i>ex-situ</i> XRD investigations, we confirm that the whole intercalation/deintercalation process proceeds <i>via</i> a solid-solution behavior with continuous lithium (de)occupying/(re)ordering on the identified insertion sites exhibiting nearly “zero-stress” characteristics. Therefore, the oxide framework of PNb<sub>9</sub>O<sub>25</sub> keeps almost intact with all the fast diffusion channels and insertion cavities well-maintained upon cycling, which accomplishes the unconventional electrochemical performance of<sub> </sub>W-R structured electrodes.</p>

Computational, Electrochemical and 7Li NMR Studies of Lithiated Disordered Carbons Electrodes in Lithium Ion Cells

1997 ◽  
Vol 496 ◽  
Author(s):  
G. Sandί ◽  
R. E. Gerald ◽  
L. G. Scanlon ◽  
K. A. Carrado ◽  
R. E. Winans
Keyword(s):  
Electrochemical Cell ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Carbon Anode ◽  
Nmr Studies ◽  
Lithium Bonding ◽  
7Li Nmr ◽  
Disordered Carbon ◽  
A Charge

ABSTRACTDisordered carbons that deliver high reversible capacity in electrochemical cells have been synthesized by using inorganic clays as templates to control the pore size and the surface area. The capacities obtained were much higher than those calculated if the resultant carbon had a graphitic-like structure. Computational chemistry was used to investigate the nature of lithium bonding in a carbon lattice unlike graphite. The lithium intercalated fullenere Lin-C60 was used as a model for our (non-graphitic) disordered carbon lattice. A dilithium-C60 system with a charge and multiplicity of (0,1) and a trilithium-C60 system with a charge and multiplicity of (0,4) were investigated. The spatial distribution of lithium ions in an electrochemical cell containing this novel disordered carbon material was investigated in situ by Li-7 NMR using an electrochemical cell that was incorporated into a toroid cavity nuclear magnetic resonance (NMR) imager. The concentration of solvated Li+ ions in the carbon anode appears to be larger than in the bulk electrolyte, is substantially lower near the copper/carbon interface, and does not change with cell charging.

scholarly journals In-situ visualization library for Yin-Yang grid simulations

2021 ◽  
Vol 73 (1) ◽  
Author(s):  
Nobuaki Ohno ◽  
Akira Kageyama
Keyword(s):  
Computer Simulations ◽  
Large Scale ◽  
Visualization Method ◽  
In Situ Visualization ◽  
Yin Yang ◽  
Post Hoc ◽  
Selection Of

AbstractThe visualization of computer simulations is currently undergoing a transition from post-hoc to in-situ visualization in which visualization processes are applied, while the simulation is running. The selection of an appropriate method or tool is essential to efficiently perform in-situ visualization in parallelized large-scale computer simulations that run on supercomputers. Although some generic in-situ visualization libraries are available, they are overengineered for certain geophysical simulations. In this study, we focus on spherical simulations using the Yin-Yang grid. Computer simulations that use the Yin-Yang grid are gaining popularity in geophysics. We propose an in-situ visualization method dedicated to the Yin-Yang grid simulations and demonstrate its effectiveness through sample simulations.

Hollow TiO2as an Anode for Lithium Ion Batteries: Synthesis and In Situ Visualization of State of Charge

2015 ◽  
Vol 1 (12) ◽  
pp. 1500256 ◽  
Author(s):  
Xingkang Huang ◽  
Shumao Cui ◽  
Richard C. Wieboldt ◽  
Peter B. Hallac ◽  
Christopher R. Fell ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
State Of Charge ◽  
In Situ Visualization

Rapid electrolyte wetting of lithium-ion batteries containing laser structured electrodes: in situ visualization by neutron radiography

2019 ◽  
Vol 102 (9-12) ◽  
pp. 2769-2778 ◽  
Author(s):  
Jan Bernd Habedank ◽  
Florian J. Günter ◽  
Nicolas Billot ◽  
Ralph Gilles ◽  
Tobias Neuwirth ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Neutron Radiography ◽  
Lithium Ion ◽  
In Situ Visualization ◽  
Electrolyte Wetting

scholarly journals In-situ visualization of the space-charge-layer effect on interfacial lithium-ion transport in all-solid-state batteries

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Longlong Wang ◽  
Ruicong Xie ◽  
Bingbing Chen ◽  
Xinrun Yu ◽  
Jun Ma ◽  
...  
Keyword(s):  
Solid State ◽  
Ion Transport ◽  
Space Charge ◽  
Lithium Ion ◽  
Space Charge Layer ◽  
High Rate ◽  
Charge Layer ◽  
Electrolyte Interface ◽  
In Situ Visualization

AbstractThe space charge layer (SCL) is generally considered one of the origins of the sluggish interfacial lithium-ion transport in all-solid-state lithium-ion batteries (ASSLIBs). However, in-situ visualization of the SCL effect on the interfacial lithium-ion transport in sulfide-based ASSLIBs is still a great challenge. Here, we directly observe the electrode/electrolyte interface lithium-ion accumulation resulting from the SCL by investigating the net-charge-density distribution across the high-voltage LiCoO2/argyrodite Li6PS5Cl interface using the in-situ differential phase contrast scanning transmission electron microscopy (DPC-STEM) technique. Moreover, we further demonstrate a built-in electric field and chemical potential coupling strategy to reduce the SCL formation and boost lithium-ion transport across the electrode/electrolyte interface by the in-situ DPC-STEM technique and finite element method simulations. Our findings will strikingly advance the fundamental scientific understanding of the SCL mechanism in ASSLIBs and shed light on rational electrode/electrolyte interface design for high-rate performance ASSLIBs.

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