Design of new electrode materials for Li-ion and Na-ion batteries from the bloedite mineral Na2Mg(SO4)2·4H2O

2014 ◽  
Vol 2 (8) ◽  
pp. 2671-2680 ◽  
Author(s):  
Marine Reynaud ◽  
Gwenaëlle Rousse ◽  
Artem M. Abakumov ◽  
Moulay T. Sougrati ◽  
Gustaaf Van Tendeloo ◽  
...  
Keyword(s):  
Electrode Materials ◽  
Redox Potentials ◽  
Li Ion

Starting from the bloedite mineral, we prepared two new electrode materials, Na2Fe(SO4)2·4H2O and Na2Fe(SO4)2, which present high redox potentials of 3.6 V vs. lithium and 3.3–3.4 V vs. sodium.

scholarly journals Redox Potential Tuning of s-Tetrazine by Substitution of Electron-Withdrawing/Donating Groups for Organic Electrode Materials

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 894
Author(s):  
Dong Joo Min ◽  
Kyunam Lee ◽  
Hyunji Park ◽  
Ji Eon Kwon ◽  
Soo Young Park
Keyword(s):  
Redox Potential ◽  
Electrode Materials ◽  
Redox Potentials ◽  
Hammett Constant ◽  
Heterogeneous Electron Transfer ◽  
Organic Electrode ◽  
Conventional Electrode ◽  
Li Ion ◽  
Cv Measurements ◽  
Redox Potential Tuning

Herein, we tune the redox potential of 3,6-diphenyl-1,2,4,5-tetrazine (DPT) by introducing various electron-donating/withdrawing groups (methoxy, t-butyl, H, F, and trifluoromethyl) into its two peripheral benzene rings for use as electrode material in a Li-ion cell. By both the theoretical DFT calculations and the practical cyclic voltammetry (CV) measurements, it is shown that the redox potentials (E1/2) of the 1,2,4,5-tetrazines (s-tetrazines) have a strong correlation with the Hammett constant of the substituents. In Li-ion coin cells, the discharge voltages of the s-tetrazine electrodes are successfully tuned depending on the electron-donating/withdrawing capabilities of the substituents. Furthermore, it is found that the heterogeneous electron transfer rate (k0) of the s-tetrazine molecules and Li-ion diffusivity (DLi) in the s-tetrazine electrodes are much faster than conventional electrode active materials.

scholarly journals A Segregated Approach for Modeling the Electrochemistry in the 3-D Microstructure of Li-Ion Batteries and Its Acceleration Using Block Preconditioners

2021 ◽  
Vol 86 (3) ◽  
Author(s):  
Jeffery M. Allen ◽  
Justin Chang ◽  
Francois L. E. Usseglio-Viretta ◽  
Peter Graf ◽  
Kandler Smith
Keyword(s):  
Degrees Of Freedom ◽  
Electrode Materials ◽  
Lithium Ion ◽  
Automotive Application ◽  
System Of Equations ◽  
Strongly Correlated ◽  
Electrolyte Depletion ◽  
Li Ion ◽  
Block Preconditioners ◽  
Electrochemical Model

AbstractBattery performance is strongly correlated with electrode microstructure. Electrode materials for lithium-ion batteries have complex microstructure geometries that require millions of degrees of freedom to solve the electrochemical system at the microstructure scale. A fast-iterative solver with an appropriate preconditioner is then required to simulate large representative volume in a reasonable time. In this work, a finite element electrochemical model is developed to resolve the concentration and potential within the electrode active materials and the electrolyte domains at the microstructure scale, with an emphasis on numerical stability and scaling performances. The block Gauss-Seidel (BGS) numerical method is implemented because the system of equations within the electrodes is coupled only through the nonlinear Butler–Volmer equation, which governs the electrochemical reaction at the interface between the domains. The best solution strategy found in this work consists of splitting the system into two blocks—one for the concentration and one for the potential field—and then performing block generalized minimal residual preconditioned with algebraic multigrid, using the FEniCS and the Portable, Extensible Toolkit for Scientific Computation libraries. Significant improvements in terms of time to solution (six times faster) and memory usage (halving) are achieved compared with the MUltifrontal Massively Parallel sparse direct Solver. Additionally, BGS experiences decent strong parallel scaling within the electrode domains. Last, the system of equations is modified to specifically address numerical instability induced by electrolyte depletion, which is particularly valuable for simulating fast-charge scenarios relevant for automotive application.

A novel eutectic solvent precursor for efficiently preparing N-doped hierarchically porous carbon nanosheets with unique surface functional groups and micro-pores towards dual-carbon lithium-ion capacitors

2021 ◽  
Author(s):  
Kaixiang Zou ◽  
Yuanfu Deng ◽  
Weijing Wu ◽  
Shiwei Zhang ◽  
Guohua Chen
Keyword(s):  
Functional Groups ◽  
Porous Carbon ◽  
High Performance ◽  
Electrode Materials ◽  
Lithium Ion ◽  
Surface Functional Groups ◽  
Carbon Nanosheets ◽  
Hierarchically Porous ◽  
Li Ion ◽  
Unique Surface

High performance carbon-based materials are ideal electrode materials for Li-ion capacitors (LICs), but there are still many challenges such as the complicated preparation preocesses, high cost and low yield. Also,...

Organic electrode materials for non-aqueous, aqueous, and all-solid-state Na-ion batteries

2021 ◽  
Author(s):  
Kathryn Holguin ◽  
Motahareh Mohammadiroudbari ◽  
Kaiqiang Qin ◽  
Chao Luo
Keyword(s):  
Solid State ◽  
High Performance ◽  
Electrode Materials ◽  
Low Cost ◽  
Li Ion Batteries ◽  
Organic Electrode ◽  
Li Ion

Na-ion batteries (NIBs) are promising alternatives to Li-ion batteries (LIBs) due to the low cost, abundance, and high sustainability of sodium resources. However, the high performance of inorganic electrode materials...

Real-time monitoring of stress development during electrochemical cycling of electrode materials for Li-ion batteries: overview and perspectives

2019 ◽  
Vol 7 (41) ◽  
pp. 23679-23726 ◽  
Author(s):  
Manoj K. Jangid ◽  
Amartya Mukhopadhyay
Keyword(s):  
Real Time ◽  
Electrode Materials ◽  
Electrochemical Potential ◽  
Li Ion Batteries ◽  
Stress Development ◽  
Electrochemical Cycling ◽  
Li Ion ◽  
Real Time Information ◽  
Time Information

Monitoring stress development in electrodes in-situ provides a host of real-time information on electro-chemo-mechanical aspects as functions of SOC and electrochemical potential.

Interphase Evolution at Two Promising Electrode Materials for Li-Ion Batteries: LiFePO4and LiNi1/2Mn1/2O2

ChemPhysChem ◽  
2014 ◽  
Vol 15 (10) ◽  
pp. 1922-1938 ◽  
Author(s):  
Nicolas Dupré ◽  
Marine Cuisinier ◽  
Jean-Frederic Martin ◽  
Dominique Guyomard
Keyword(s):  
Electrode Materials ◽  
Li Ion Batteries ◽  
Li Ion

Insertion properties of LiFe0.5Mn0.5PO4 electrode materials for Li-ion batteries

Ionics ◽  
2008 ◽  
Vol 14 (5) ◽  
pp. 371-376 ◽  
Author(s):  
K. Zaghib ◽  
A. Mauger ◽  
F. Gendron ◽  
M. Massot ◽  
C. M. Julien
Keyword(s):  
Electrode Materials ◽  
Li Ion Batteries ◽  
Li Ion

A neutron diffraction cell for studying lithium-insertion processes in electrode materials

1998 ◽  
Vol 31 (5) ◽  
pp. 823-825 ◽  
Author(s):  
Ö. Bergstöm ◽  
A. M. Andersson ◽  
K. Edström ◽  
T. Gustafsson
Keyword(s):  
Neutron Diffraction ◽  
Electrode Materials ◽  
Negative Electrode ◽  
Current Collector ◽  
Neutron Diffraction Study ◽  
Lithium Insertion ◽  
Lithium Electrode ◽  
Extraction Processes ◽  
Li Ion

An electrochemical cell has been constructed forin situneutron diffraction studies of lithium-insertion/extraction processes in electrode materials for Li-ion batteries. Its key components are a Pyrex tube, gold plated on its inside, which functions as a current collector, and a central lithium rod, which serves as the negative electrode. The device is demonstrated here for a neutron diffraction study of lithium extraction from LiMn2O4: a mechanical Celgard©separator soaked in the electrolyte surrounds the lithium electrode. The LiMn2O4powder, mixed with electrolyte, occupies the space between separator and current collector.

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