Long-cycle-life Lithium-sulfur Batteries with Lithium Solvate Ionic Liquids

Seki, Shiro; Serizawa, Nobuyuki; Takei, Katsuhito; Umebayashi, Yasuhiro; Tsuzuki, Seiji; Watanabe, Masayoshi

doi:10.5796/electrochemistry.85.680

Cited by 35 publications

(28 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In summary, Figure shows a very suitable cell performance in terms of cycle life, cell stability, and delivered capacity, particularly relevant at the high currents and a remarkable electrode/electrolyte interphase stability, thus suggesting the S‐Sn material for application in high‐performance Li/S batteries . Certainly, these characteristics may be further improved by adopting different electrode compositions, as mentioned by the discussion of Figure , as well as by using enhanced electrolytes designed to increase the cycle life of the cell …”

Section: Resultsmentioning

confidence: 88%

Sulfur Loaded by Nanometric Tin as a New Electrode for High‐Performance Lithium/Sulfur Batteries

Marangon

Hassoun

2019

Energy Tech

View full text Add to dashboard Cite

Herein, a composite material formed by coating sulfur on nanometric tin is investigated as the cathode for high‐performance lithium/sulfur (Li/S) batteries. The study includes structural and morphological characterization performed by X‐ray diffraction and electron microscopy, as well as electrochemical investigation by means of voltammetry, electrochemical impedance spectroscopy, and galvanostatic cycling in lithium cell. The data show an electrode reflecting the crystalline structure of S8 and Sn, with a suitable morphology that consists of micrometric sulfur particles surrounding a metallic core of nanometric tin. This particular configuration leads to optimal behavior in the lithium cell, with a highly reversible electrochemical process evolving between 1.9 and 2.8 V versus Li+/Li and low polarization. The S‐Sn composite shows a favorable electrode/electrolyte interphase having a resistance limited to few ohms after the first activation charge/discharge cycle in the Li/S cell, which allows suitable operation with excellent rate capability and limited capacity fading. Indeed, the cell shows an efficiency approaching 100% upon the first cycle, a maximum specific capacity of about 1200 mAh g−1 at C/10 rate, and still a relevant capacity value of about 700 mAh g−1 at the relatively high C‐rate of 2 C, with suitable retention upon 100 charge/discharge cycles.

show abstract

Section: Resultsmentioning

confidence: 88%

Sulfur Loaded by Nanometric Tin as a New Electrode for High‐Performance Lithium/Sulfur Batteries

Marangon

Hassoun

2019

Energy Tech

View full text Add to dashboard Cite

show abstract

“…Currently, the research community has proposed several promising cell configurations, such as interlayers, coated separators, and porous current collectors . Another possible route is the development of better electrolytes, such as optimizing the electrolyte solvent and/or salt, application of organic electrolyte containing high salt concentration (e.g., >1.0 m ), and liquid ionic electrolytes with additives . Recently, heteroatom‐doped and polar materials that possess a strong chemical interaction with lithium polysulfides have been designed for Li–S cells .…”

Section: Lithium–sulfur Cellsmentioning

confidence: 99%

“…Electrolyte Formula : While most of the work in the area of lithium–sulfur cells has focused on developing the sulfur cathode, relatively little attention has been paid to considering and optimizing the electrolyte formula . The electrolyte formula involves the selection of electrolyte solution, lithium salts, and auxiliary additives (Figure g–i).…”

Section: Lithium–sulfur Cellsmentioning

confidence: 99%

“…Several different solution systems have been reported in early studies, such as poly(ethylene glycol) dimethyl ether (PEGDME), tetraethylene glycol dimethyl ether (TEGDME), and mixtures of DOL and TEGDME. However, after 2014, binary mixtures of DOL/DME became the most commonly used electrolyte solution because of their acceptable stability and compatibility toward polysulfides . Thus, from 2014 till now, over 95% of lithium–sulfur studies use DOL/DME solvent for the electrolyte (Figure g and Table ).…”

Section: Lithium–sulfur Cellsmentioning

confidence: 99%

See 1 more Smart Citation

Current Status and Future Prospects of Metal–Sulfur Batteries

Chung¹,

Manthiram²

2019

Advanced Materials

473

415

View full text Add to dashboard Cite

that makes use of intercalation materials as the electrodes (Figure 1), applications involving electric vehicles and smart grids may require rechargeable batteries with new battery chemistries that can generate even higher energy densities for longer driving ranges and higher energy-storage capabilities. [6][7][8] Additionally, the lithiated transition-metal oxides used in commercial lithium-ion battery cathodes tend to be expensive, scarce, or toxic to the environment. Thus, it is desirable to explore new electrode materials that are naturally abundant (and therefore less expensive) as well as environmentally compatible in order to successfully enter the future battery markets. [6,[8][9][10][11] This driving force has promoted the development of batteries with conversionreaction electrodes, in which reversible electrochemical reactions take place and new chemical compounds form during the cycling of the battery. Naturally abundant materials, such as sulfur for the cathode, can be applied as electrodes. Different metallic anodes have shown great potential in coupling with sulfur cathode to generate a high energy density, including lithium metal [3,10,[12][13][14][15][16][17]31] as well as other alkali [18][19][20][21][22][23][24]31] and high-valent metals. [18,[25][26][27][28][29][30][31] As a next-generation energy-storage technology beyond lithium-ion batteries, lithium-sulfur batteries are the most promising low-cost, high-capacity energy-storage device available due to their high charge-storage capacity, low cost, and the wide availability of sulfur. [32][33][34][35] The electrochemical reactions of lithium-sulfur batteries involve reversible conversions between sulfur (S 8 ), lithium polysulfides (Li 2 S x , x = 4-8), and lithium sulfides (Li 2 S 2 and Li 2 S). [33][34][35][36] The conversions between sulfur and lithium polysulfides and lithium sulfides involve phase changes between liquid-state polysulfides and solid-state sulfur and sulfides. [35][36][37][38][39][40] Thus, the conversion reaction of lithium-sulfur battery chemistry has no restriction in maintaining the initial crystal chemistry of the electrode during electrochemical cycling. [39][40][41][42] Therefore, a full twoelectron redox reaction per sulfur atom can occur in a manner that is both reversible and stable, increasing the chargestorage capacity drastically as compared to the currently used insertion-reaction oxide cathodes. [7,[39][40][41][42] As a result, sulfur cathodes possess a high theoretical charge-storage capacity of 1672 mA h g −1 , which is the highest value among solid-state Lithium-sulfur batteries are a major focus of academic and industrial energystorage research due to their high theoretical energy density and the use of low-cost materials. The high energy density results from the conversion mechanism that lithium-sulfur cells utilize. The sulfur cathode, being naturally abundant and environmentally friendly, makes lithium-sulfur batteries a potential next-generation energy-storage technology. The current state of the rese...

show abstract

“…An important problem in chaotic applications is to reconstruct an n-dimensional phase space containing the chaotic motion from the time series of a single variable. According to Takens' Theorem [14], the inherent evolution rule can be restored in a high dimensional space, that is, when the embedding dimension d of the phase space is greater than a certain value, there exists a smooth mapping f, making the time-series delay time τ Equation (1). Then, there is…”

Section: Probabilistic Prediction Algorithm For the Residual Life Of mentioning

confidence: 99%

Probabilistic Prediction Algorithm for Cycle Life of Energy Storage in Lithium Battery

Wang

Gao

Sun

2019

WEVJ

View full text Add to dashboard Cite

Lithium batteries are widely used in energy storage power systems such as hydraulic, thermal, wind and solar power stations, as well as power tools, military equipment, aerospace and other fields. The traditional fusion prediction algorithm for the cycle life of energy storage in lithium batteries combines the correlation vector machine, particle filter and autoregressive model to predict the cycle life of lithium batteries, which are subjected to many uncertainties in the prediction process and to inaccurate prediction results. In this paper, a probabilistic prediction algorithm for the cycle life of energy storage in lithium batteries is proposed. The LS-SVR prediction model was trained by a Bayesian three-layer reasoning. In the iterative prediction phase, the Monte Carlo method was used to express and manage the uncertainty and its transitivity in a multistep prediction and to predict the future trend of a lithium battery's health status. Based on the given failure threshold, the probability distribution of the residual life was obtained by counting the number of particles passing through the threshold. The wavelet neural network was used to study the sample data of lithium batteries, and the mapping relationship between the probability distribution of the residual life of lithium batteries and the unknown values were established. According to this mapping relation and the probability distribution of the residual life of lithium batteries, the health data could be deduced and then iterated into the input of the wavelet neural network. In this way, the predicted degradation curve and the cycle life of lithium batteries could be obtained. The experimental results show that the proposed algorithm has good adaptability and high prediction efficiency and accuracy, with the mean error of 0.17 and only 1.38 seconds by average required for prediction.World Electric Vehicle Journal 2019, 10, 7 2 of 17 directly measured but needs to be estimated in advance to decide whether to replace the battery to avoid some unnecessary events. The performance of batteries can be divided into two categories: electrical performance and reliability. Battery life is one of the important indicators to measure the electrical performance of batteries. Charge-discharge cycles include a charge operation and a discharge operation. The number of charge-discharge cycles that a battery can carry out while maintaining a certain output capacity is called the cycle life (service life) of the battery. For energy storage batteries, it is generally believed that the life of the battery is terminated when the available capacity of the battery decreases to 70% of the initial level [4]. Battery life includes cycle life and calendar life, where the former refers to the number of cycles of the battery from a certain charging and discharging system to the end of life and the latter refers to the time required for the battery to be stored in a certain state until the end of life. There are many complex physical and chemical reactions in the charge and discha...

show abstract

Long-cycle-life Lithium-sulfur Batteries with Lithium Solvate Ionic Liquids

Cited by 35 publications

References 19 publications

Sulfur Loaded by Nanometric Tin as a New Electrode for High‐Performance Lithium/Sulfur Batteries

Sulfur Loaded by Nanometric Tin as a New Electrode for High‐Performance Lithium/Sulfur Batteries

Current Status and Future Prospects of Metal–Sulfur Batteries

Probabilistic Prediction Algorithm for Cycle Life of Energy Storage in Lithium Battery

Contact Info

Product

Resources

About