Faster Diffusion and Higher Lithium-Ion Intercalation Capacity in Pb-Jarosite than Na-Jarosite

2021 ◽  
Author(s):  
Zachary G. Neale ◽  
Michael Barta ◽  
Guozhong Cao
Keyword(s):  
Lithium Ion ◽  
Ion Intercalation

Enhanced Lithium-Ion Intercalation Properties of V2O5 Xerogel Electrodes with Surface Defects

2011 ◽  
Vol 115 (11) ◽  
pp. 4959-4965 ◽  
Author(s):  
Dawei Liu ◽  
Yanyi Liu ◽  
Anqiang Pan ◽  
Kenneth P. Nagle ◽  
Gerald T. Seidler ◽  
...  
Keyword(s):  
Surface Defects ◽  
Lithium Ion ◽  
V2o5 Xerogel ◽  
Ion Intercalation

Research Progress and Application of Modified Silicon-Based Anode Materials for Lithium-Ion Batteries

2021 ◽  
Vol 1036 ◽  
pp. 35-44
Author(s):  
Ling Fang Ruan ◽  
Jia Wei Wang ◽  
Shao Ming Ying
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Volume Expansion ◽  
Anode Materials ◽  
Active Material ◽  
Three Dimensional ◽  
Lithium Ion ◽  
Research Progress ◽  
Ion Intercalation ◽  
Silicon Based

Silicon-based anode materials have been widely discussed by researchers because of its high theoretical capacity, abundant resources and low working voltage platform,which has been considered to be the most promising anode materials for lithium-ion batteries. However,there are some problems existing in the silicon-based anode materials greatly limit its wide application: during the process of charge/discharge, the materials are prone to about 300% volume expansion, which will resultin huge stress-strain and crushing or collapse on the anods; in the process of lithium removal, there is some reaction between active material and current collector, which creat an increase in the thickness of the solid phase electrolytic layer(SEI film); during charging and discharging, with the increase of cycle times, cracks will appear on the surface of silicon-based anode materials, which will cause the batteries life to decline. In order to solve these problems, firstly, we summarize the design of porous structure of nanometer sized silicon-based materials and focus on the construction of three-dimensional structural silicon-based materials, which using natural biomass, nanoporous carbon and metal organic framework as structural template. The three-dimensional structure not only increases the channel of lithium-ion intercalation and the rate of ion intercalation, but also makes the structure more stable than one-dimensional or two-dimensional. Secondly, the Si/C composite, SiOx composite and alloying treatment can improve the volume expansion effection, increase the rate of lithium-ion deblocking and optimize the electrochemical performance of the material. The composite materials are usually coated with elastic conductive materials on the surface to reduce the stress, increase the conductivity and improve the electrochemical performance. Finally, the future research direction of silicon-based anode materials is prospected.

scholarly journals Kinetics of electrochemical intercalation of lithium ion into Li[Li0.2Co0.3Mn0.5]O2 electrode from Li2SO4 solution

2021 ◽  
Vol 23 (09) ◽  
pp. 656-687
Author(s):  
K.C. Mahesh ◽  
◽  
G.S. Suresh ◽  
Keyword(s):  
Aqueous Electrolyte ◽  
Lithium Ion ◽  
Potential Drop ◽  
Charge Transfer Resistance ◽  
Transfer Resistance ◽  
Ohmic Potential Drop ◽  
Ion Intercalation ◽  
Time Invariant ◽  
Kinetics Of ◽  
Titration Technique

The kinetics of electrochemical lithium ion intercalation into Li[Li0.2Co0.3Mn0.5]O2 electrode in 2 M Li2SO4 aqueous electrolyte has been studied using two electroanalytical methods, namely, potentiostatic intermittent titration technique (PITT) and galvanostatic intermittent titration technique (GITT). The results are compared with those from nonaqueous electrolytes. Layered, lithium-rich Li[Li0.2Co0.3Mn0.5]O2 cathode material was synthesized by reactions under autogenic pressure at elevated temperature (RAPET) method. The effects of ohmic potential drop and charge-transfer resistance have been considered while predicting the current transients obtained with aqueous electrolyte. For PITT and GITT, we have defined their characteristic time-invariant functions, It1/2 and dE/dt1/2, respectively to present the diffusion time constant τ. Application of different theoretical diffusion models for treating the results obtained by the above-mentioned techniques allowed us to calculate the diffusion coefficient of lithium ions (D) at different potentials (E). The intercalation process is explained by considering the possible attractive interactions of the intercalated species in terms of Frumkin intercalation isotherm. We have observed a strictcorrespondence between the peaks of the intercalation capacitance and the minima in the corresponding log D vs. E curve.

scholarly journals Solvated Lithium Ion Intercalation Behavior of Graphitized Carbon Nanospheres

2020 ◽  
Vol 88 (2) ◽  
pp. 79-82
Author(s):  
Shohei MARUYAMA ◽  
Tomokazu FUKUTSUKA ◽  
Kohei MIYAZAKI ◽  
Takeshi ABE
Keyword(s):  
Lithium Ion ◽  
Carbon Nanospheres ◽  
Graphitized Carbon ◽  
Ion Intercalation

Electrochemical performance and lithium-ion intercalation kinetics of submicron-sized Li4Ti5O12 anode material

2013 ◽  
Vol 547 ◽  
pp. 107-112 ◽  
Author(s):  
Yan-Rong Zhu ◽  
Long-Cheng Yin ◽  
Ting-Feng Yi ◽  
Haiping Liu ◽  
Ying Xie ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Anode Material ◽  
Lithium Ion ◽  
Ion Intercalation ◽  
Kinetics Of ◽  
Li4ti5o12 Anode

scholarly journals Synthesis and Electrochemical Properties of InVO4 Nanotube Arrays

2006 ◽  
Vol 922 ◽  
Author(s):  
Ying Wang ◽  
Guozhong Cao
Keyword(s):  
Substrate Surface ◽  
Lithium Ion ◽  
Nanotube Arrays ◽  
Outer Diameter ◽  
Diffusion Distance ◽  
Nanotube Array ◽  
Charge Capacity ◽  
Polycarbonate Membranes ◽  
Ion Intercalation ◽  
Short Diffusion Distance

AbstractA capillary-enforced template-based method is described for the preparation of InVO4 nanotube arrays. Nanotube arrays of InVO4 were prepared by filling the InVO4 sol into pores of polycarbonate membranes and pyrolyzing through sintering. Another type of InVO4 nanotube arrays (InVO4/acac) are obtained from the sol with the addition of acetylene acetone (acac). For comparison purposes, InVO4 films were prepared by drop casting from InVO4 same sol. Films and the two types of nanotube arrays of InVO4 annealed at 500°C consist of mixed monoclinic (InVO4-I) and orthorhombic (InVO4-III) phases. Scanning electron microscopy (SEM) characterizations indicate that the nanotubes are well-aligned, perpendicular to substrate surface with the outer diameter of ~200 nm for short InVO4 nanotubes and ~170 nm for long InVO4 nanotubes. Chronopotentiometry results reveal that InVO4/acac nanotube array has the highest charge capacity (790 mAh/g), followed by InVO4 nanotube array (600 mAh/g) then InVO4 film (290 mAh/g). Such enhanced lithium-ion intercalation properties are ascribed to the large surface area and short diffusion distance offered by nanostructures and amorphisation caused by acetylene acetone in the case of InVO4/acac nanotube arrays.

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