Dissolution Kinetics of Spinel Lithium Manganate and its Relation to Capacity Fading in Lithium Ion Batteries

2002 ◽  
Vol 17 (6) ◽  
pp. 1476-1481 ◽  
Author(s):  
Chung-Hsin Lu ◽  
Shang-Wei Lin
Keyword(s):  
Elevated Temperatures ◽  
Lithium Ion ◽  
Dissolution Kinetics ◽  
Reaction Rate Constant ◽  
Dissolution Behavior ◽  
Capacity Fading ◽  
Dissolution Reaction ◽  
Lithium Manganate ◽  
Spinel Lithium Manganate ◽  
Kinetics Of

The dissolution behavior and kinetics of spinel lithium manganate LiMn2O4 with different particle sizes have been investigated in this study. The dissolution of manganese cations from LiMn2O4 is confirmed to occur when LiMn2O4 particles are immersed in the electrolytes. The amount of dissolved manganese ions markedly increases with a rise in temperature and a decrease in particle size, which implies that the capacity fading of LiMn2O4 at elevated temperatures is associated with manganese dissolution. On the basis of the isothermal analysis of reaction kinetics, the rate of manganese dissolution from LiMn2O4 is dominated by the rate of dissolution reaction. Smaller particles exhibit a larger reaction rate constant and higher activation energy of the dissolution process than the larger ones. Therefore, an increase in temperature has a more pronounced effect on the dissolution reaction of small particles than on that of large particles.

Building an artificial solid electrolyte interphase on spinel lithium manganate for high performance aqueous lithium-ion batteries

2020 ◽  
Vol 49 (24) ◽  
pp. 8136-8142
Author(s):  
Wujie Dong ◽  
Xieyi Huang ◽  
Yan Jin ◽  
Miao Xie ◽  
Wei Zhao ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Lithium Ion Batteries ◽  
High Performance ◽  
Solid Electrolyte Interphase ◽  
Lithium Ion ◽  
Interphase Layer ◽  
Lithium Storage ◽  
Lithium Manganate ◽  
Spinel Lithium Manganate

An artificial solid electrolyte interphase layer using lithium polyacrylate on spinel LiMn2O4 enables fast and durable aqueous lithium storage.

Unconventional capacity increase kinetics of a chemically engineered SnO2 aerogel anode for long-term stable lithium-ion batteries

2020 ◽  
Vol 8 (17) ◽  
pp. 8244-8254 ◽  
Author(s):  
Sung Mi Jung ◽  
Dong Won Kim ◽  
Hyun Young Jung
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Capacity Fading ◽  
Capacity Increase ◽  
Kinetics Of

SnO2 aerogel anode delivers the highest reversible capacity of about 2031 mAh g−1 with a 200% capacity recovery and presents the superior cyclability over 10 000 cycles under high C-rates without evident capacity fading tendency.

Effects of film thickness and alkaline concentration on dissolution kinetics of poly(4-hydroxystyrene) in alkaline aqueous solution

2022 ◽  
Author(s):  
Naoki Tanaka ◽  
Kyoko Matsuoka ◽  
Takahiro KOZAWA ◽  
Takuya Ikeda ◽  
Yoshitaka Komuro ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Film Thickness ◽  
Thick Films ◽  
Dissolution Kinetics ◽  
Dissolution Behavior ◽  
Chemically Amplified ◽  
Fundamental Understanding ◽  
Chemically Amplified Resists ◽  
Kinetics Of ◽  
Simple Combination

Abstract The dissolution behavior of a simple combination of poly(4-hydroxystyrene) (PHS) films and tetramethylammonium hydroxide (TMAH) aqueous solution was analyzed to gain a fundamental understanding of the effects of film thickness and alkaline concentration on the dissolution kinetics of chemically amplified resists (CARs). Films of four different thicknesses, from thick (approximately 900 nm) to thin (approximately 50 nm), were developed in 22 different developers of different concentrations. The dissolution behavior of each combination was observed using a quartz crystal microbalance (QCM). Differences in dissolution kinetics due to film thickness were observed even between relatively thick films such as 900- and 500-nm thick films in dilute developers. These differences were considered to be caused by the diffusion of the solution into the films. Thin films also showed characteristic behavior with dilution. This behavior was due to the interaction between the substrate and the films, unlike in the case of thick films.

scholarly journals Dissolution Kinetics of International Simple Glass and Formation of Secondary Phases at Very High Surface Area to Solution Ratio in Young Cement Water

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1254
Author(s):  
Karine Ferrand ◽  
Martina Klinkenberg ◽  
Sébastien Caes ◽  
Jenna Poonoosamy ◽  
Wouter Van Renterghem ◽  
...  
Keyword(s):  
High Surface ◽  
High Surface Area ◽  
Dissolution Kinetics ◽  
Dissolution Behavior ◽  
Secondary Phases ◽  
Residual Rate ◽  
Glass Dissolution ◽  
Ph Decrease ◽  
Kinetics Of ◽  
Very High

Static dissolution experiments were carried out with the reference International Simple Glass under hyperalkaline pH at 70 °C and very high SA/V ratio. Three aspects of glass dissolution behavior were investigated, (1) the rate drop regime and the residual rate (stage II), (2) the formation of secondary phases including thermodynamic aspects, and (3) the microstructure of the interface of altered glass and secondary phases. A very low residual rate of 6 × 10−6 g/m2d was determined based on boron release, which was several orders of magnitude lower than the initial rate established between the start of the experiments and the first sampling on day 59. The presence of a porous layer with a thickness varying between 80 nm and 250 nm and a pore size between 10 nm and 50 nm was observed. CSH phases with a low Ca/Si ratio of 0.3–0.4 and zeolites were also visible at the surface of the altered glass grains, but no glass alteration resumption occurred, probably due to an important pH decrease already at day 59. Thermodynamic calculations assuming congruent glass dissolution and precipitation of the dissolved aqueous species confirmed the precipitation of CSH phases and zeolites.

scholarly journals An Empirical Rate Constant Based Model to Study Capacity Fading in Lithium Ion Batteries

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Srivatsan Ramesh ◽  
K. Venkata Ratnam ◽  
Balaji Krishnamurthy
Keyword(s):  
Rate Constant ◽  
Film Formation ◽  
Solid Electrolyte Interphase ◽  
Lithium Ion ◽  
Capacity Fading ◽  
Formation Reaction ◽  
One Dimensional ◽  
Battery Systems ◽  
Diffusion And Kinetics ◽  
Kinetics Of

A one-dimensional model based on solvent diffusion and kinetics to study the formation of the SEI (solid electrolyte interphase) layer and its impact on the capacity of a lithium ion battery is developed. The model uses the earlier work on silicon oxidation but studies the kinetic limitations of the SEI growth process. The rate constant of the SEI formation reaction at the anode is seen to play a major role in film formation. The kinetics of the reactions for capacity fading for various battery systems are studied and the rate constants are evaluated. The model is used to fit the capacity fade in different battery systems.

scholarly journals Optimization and Kinetics of Zirconium Oxychloride (ZOC) Dissolution Using HNO3

2019 ◽  
Vol 19 (4) ◽  
pp. 928
Author(s):  
Maria Veronika Purwani ◽  
Muzakky Muzakky
Keyword(s):  
Reaction Mechanism ◽  
Dissolution Kinetics ◽  
Frequency Factor ◽  
Chemical Reactor ◽  
Extraction Process ◽  
Zirconium Oxychloride ◽  
Reaction Rate Constant ◽  
K Value ◽  
Hno3 Concentration ◽  
Kinetics Of

The design of chemical reactor can not be separated from the optimization data and reaction kinetics obtained from the experimental measurement. Through the idea of making the dissolution reactor design, the purpose of this research is to obtain optimization data and dissolution kinetics of Zirconium Oxide Chloride (ZOC) using HNO3. The design of the solvent reactor is required to make the feedstock in the liquid-liquid extraction process continuously. The extraction process is a mini-pilot plant unit as a nuclear-grade zirconia manufacture. The dissolution optimization was carried out by dissolving ZOC solids of zircon sand processed products using HNO3 in a container with some variation of contact time, HNO3 concentration and temperature. While the kinetics data was gained by extracting from the optimization data obtained based on the formula of reaction orders. The investigation result with 6 gr of ZOC and 6M HNO3 concentration obtained the best contact optimum time of 2 minutes and the conversion number (α) of 0.96. The dissolution reaction mechanism was estimated in accordance with the reaction of order 1 with the  k value of 1.5879 minutes-1. It was predicted that the reaction mechanism of ZOC dissolution in HNO3 begins with diffuse control and is followed by chemical reaction control. With increasing conversion temperature, the conversion will increase to 0.98, while the reaction also follows the reaction order 1. The optimum temperature at 60 °C, and the correlation between temperature (T) with the calculated reaction rate constant (k) according to the Arrhenius formula yielded an equation of ln k = - 4191,6 / T + 13,903 or k = 13,903.e- 4191,6 / T, with the frequency factor A = 1091430 and the activation energy E = 34,848 kJ / mole.

Electrochemical Properties of Solution Synthesized Undoped and Aluminum Doped Lithium Manganate Thin Films

2004 ◽  
Vol 822 ◽  
Author(s):  
S.R. Das ◽  
N.K. Karan ◽  
S.B. Majumder ◽  
R.S. Katiyar
Keyword(s):  
Thin Films ◽  
Elevated Temperatures ◽  
Low Cost ◽  
Lithium Ion ◽  
Cost Effective ◽  
Research Issues ◽  
Growth Technique ◽  
Benign Nature ◽  
Lithium Manganate ◽  
Ion Intercalation

AbstractThe spinel structured lithium manganate (LMO) is a promising cathode material for lithium ion rechargeable micro-batteries due to its higher energy density, environmentally benign nature, and low cost. To date, self-discharge and capacity fading (4 and 3V range), especially at elevated temperatures, still remains major research issues of LMO based cathodes. In the present work we have successfully synthesized lithium manganate thin films by a cost effective solution growth technique. These films exhibited excellent reversible lithium ion intercalation behavior with a discharge capacity of about 55.08:Ahcm−2:m−1 at a load of 20:Acm−2. The Li+ diffusivity was found to increase by substituting a part of manganese with aluminum (Al) in LMO lattice. Al substituted LMO films exhibited better cycleability as compared to the undoped LMO films. Further studies are in progress to investigate the effect of Al substitution on the cycleability of the films.

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