scholarly journals Short-range ordering in a battery electrode, the ‘cation-disordered’ rocksalt Li1.25Nb0.25Mn0.5O2

2019 ◽  
Vol 55 (61) ◽  
pp. 9027-9030 ◽  
Author(s):  
Michael A. Jones ◽  
Philip J. Reeves ◽  
Ieuan D. Seymour ◽  
Matthew J. Cliffe ◽  
Siân E. Dutton ◽  
...  
Keyword(s):  
Correlation Length ◽  
Local Structure ◽  
Short Range ◽  
Li Ion Battery ◽  
Synthesis Conditions ◽  
Short Range Ordering ◽  
Battery Electrode ◽  
Li Ion ◽  
Battery Material

We demonstrate short-range ordering in Li-ion battery material Li1.25Nb0.25Mn0.5O2, and identify its local structure and correlation length—which is sensitive to synthesis conditions and has important consequences for the material's electrochemistry.

scholarly journals Short-Range Ordering in Battery Electrode, the ‘Cation-Disordered’ Rocksalt Li1.25Nb0.25Mn0.5O2

2019 ◽  
Author(s):  
Michael Jones ◽  
Philip J. Reeves ◽  
Ieuan D. Seymour ◽  
Matthew J. Cliffe ◽  
Siân E. Dutton ◽  
...  
Keyword(s):  
Local Structure ◽  
Solid State Nmr ◽  
Cation Ordering ◽  
Li Ion Battery ◽  
X Ray Diffraction ◽  
X Ray ◽  
Short Range Ordering ◽  
Battery Electrode ◽  
Li Ion ◽  
Battery Material

We show the occurrence of local cation ordering in Li-ion battery material Li<sub>1.25</sub>Nb<sub>0.25</sub>Mn<sub>0.5</sub>O<sub>2</sub>, previously thought to be disordered. We deduce this ordering from X-ray diffraction, and test it against neutron diffraction & PDF, magnetic susceptibility and solid state NMR evidence. We identify the nature of the ordering as having a local structure related to that of gamma-LiFeO<sub>2</sub>, determine the correlation length of such ordering, and demonstrate its significant consequences for the material's electrochemistry.

scholarly journals Short-Range Ordering in Battery Electrode, the ‘Cation-Disordered’ Rocksalt Li1.25Nb0.25Mn0.5O2

2019 ◽  
Author(s):  
Michael Jones ◽  
Philip J. Reeves ◽  
Ieuan D. Seymour ◽  
Matthew J. Cliffe ◽  
Siân E. Dutton ◽  
...  
Keyword(s):  
Local Structure ◽  
Solid State Nmr ◽  
Cation Ordering ◽  
Li Ion Battery ◽  
X Ray Diffraction ◽  
X Ray ◽  
Short Range Ordering ◽  
Battery Electrode ◽  
Li Ion ◽  
Battery Material

We show the occurrence of local cation ordering in Li-ion battery material Li<sub>1.25</sub>Nb<sub>0.25</sub>Mn<sub>0.5</sub>O<sub>2</sub>, previously thought to be disordered. We deduce this ordering from X-ray diffraction, and test it against neutron diffraction & PDF, magnetic susceptibility and solid state NMR evidence. We identify the nature of the ordering as having a local structure related to that of gamma-LiFeO<sub>2</sub>, determine the correlation length of such ordering, and demonstrate its significant consequences for the material's electrochemistry.

scholarly journals In-line monitoring of Li-ion battery electrode porosity and areal loading using active thermal scanning - modeling and initial experiment

2018 ◽  
Vol 375 ◽  
pp. 138-148 ◽  
Author(s):  
Przemyslaw Rupnowski ◽  
Michael Ulsh ◽  
Bhushan Sopori ◽  
Brian G. Green ◽  
David L. Wood ◽  
...  
Keyword(s):  
Li Ion Battery ◽  
Initial Experiment ◽  
Battery Electrode ◽  
Li Ion

scholarly journals A Model for Investigating Sources of Li-Ion Battery Electrode Heterogeneity: Part I. Electrode Drying and Calendering Processes

2021 ◽  
Author(s):  
Mojdeh Nikpour ◽  
Nathan Barrett ◽  
Zachary Hillman ◽  
Andrea Thompson ◽  
Brian A Mazzeo ◽  
...  
Keyword(s):  
Li Ion Battery ◽  
Battery Electrode ◽  
Li Ion

Considerations in Applying Neutron Depth Profiling (NDP) to Li-Ion Battery Research

2022 ◽  
Author(s):  
Daniel J. Lyons ◽  
Jamie L. Weaver ◽  
Anne C. Co
Keyword(s):  
Electrode Materials ◽  
Depth Profiling ◽  
Li Ion Battery ◽  
Neutron Depth Profiling ◽  
Battery Electrode ◽  
Li Ion

Li distribution within micron-scale battery electrode materials is quantified with neutron depth profiling (NDP). This method allows the determination of intra- and inter-electrode parameters such as lithiation efficiency, electrode morphology...

scholarly journals Machine Learning Approaches for Designing Mesoscale Structure of Li-Ion Battery Electrodes

Batteries ◽  
2019 ◽  
Vol 5 (3) ◽  
pp. 54 ◽  
Author(s):  
Yoichi Takagishi ◽  
Takumi Yamanaka ◽  
Tatsuya Yamaue
Keyword(s):  
Machine Learning ◽  
Process Parameters ◽  
Volume Fraction ◽  
Specific Resistance ◽  
Active Material ◽  
Li Ion Battery ◽  
Battery Electrode ◽  
Li Ion ◽  
Simulation Results ◽  
Charge Discharge

We have proposed a data-driven approach for designing the mesoscale porous structures of Li-ion battery electrodes, using three-dimensional virtual structures and machine learning techniques. Over 2000 artificial 3D structures, assuming a positive electrode composed of randomly packed spheres as the active material particles, are generated, and the charge/discharge specific resistance has been evaluated using a simplified physico-chemical model. The specific resistance from Li diffusion in the active material particles (diffusion resistance), the transfer specific resistance of Li+ in the electrolyte (electrolyte resistance), and the reaction resistance on the interface between the active material and electrolyte are simulated, based on the mass balance of Li, Ohm’s law, and the linearized Butler–Volmer equation, respectively. Using these simulation results, regression models, using an artificial neural network (ANN), have been created in order to predict the charge/discharge specific resistance from porous structure features. In this study, porosity, active material particle size and volume fraction, pressure in the compaction process, electrolyte conductivity, and binder/additives volume fraction are adopted, as features associated with controllable process parameters for manufacturing the battery electrode. As a result, the predicted electrode specific resistance by the ANN regression model is in good agreement with the simulated values. Furthermore, sensitivity analyses and an optimization of the process parameters have been carried out. Although the proposed approach is based only on the simulation results, it could serve as a reference for the determination of process parameters in battery electrode manufacturing.

scholarly journals Composition-Structure Relationships in the Li-Ion Battery Electrode Material LiNi0.5Mn1.5O4

2012 ◽  
Vol 24 (15) ◽  
pp. 2952-2964 ◽  
Author(s):  
Jordi Cabana ◽  
Montserrat Casas-Cabanas ◽  
Fredrick O. Omenya ◽  
Natasha A. Chernova ◽  
Dongli Zeng ◽  
...  
Keyword(s):  
Electrode Material ◽  
Li Ion Battery ◽  
Battery Electrode ◽  
Li Ion ◽  
Composition Structure
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