The Role of Current Collector in Enabling the High Performance of Li/S Battery

Benítez, Almudena; Caballero, Álvaro; Rodríguez‐Castellón, Enrique; Morales, J.; Hassoun, Jusef

doi:10.1002/slct.201802529

Cited by 22 publications

(37 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure a shows the voltage profile of the above cycle in which the states of charge corresponding to the XRD measurements are indicated by P1 (OCV) and P2 (after charge), while the related patterns are reported in Figure b. The XRD of the electrode at the pristine state (black pattern in Figure b) clearly shows the reflections of sulfur and tin, as already observed for the material powder in Figure , with additional very broad signal between 20° and 30° due to the GDL carbon matrix used as the support . This pattern confirms the expected retention of the S‐Sn structure upon deposition on GDL support through doctor blade casting (see Experimental Section).…”

Section: Resultssupporting

confidence: 72%

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

Marangon

Hassoun

2019

Energy Tech

Self Cite

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: Resultssupporting

confidence: 72%

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

Marangon

Hassoun

2019

Energy Tech

Self Cite

View full text Add to dashboard Cite

show abstract

“…Therefore, we have cast the S-MWCNTs material on a carbon-cloth support (i.e., a gas diffusion layer, GDL) instead of the conventional aluminum support previously used in order to improve the sodium cell stability. Such an improvement by changing the current collector has been observed in recent reports on lithium-sulfur batteries [72][73][74] and attributed to the microporous texture of the carbon-cloth, leading to an optimal electric contact with the active material, as well as to its favorable chemical composition and wetting ability [75]. Indeed, Fig.…”

Section: Figurementioning

confidence: 53%

Triglyme-based electrolyte for sodium-ion and sodium-sulfur batteries

Lecce

Minnetti

Polidoro

et al. 2019

Ionics

Self Cite

View full text Add to dashboard Cite

Herein we investigate a lowly flammable electrolyte formed by dissolving sodium trifuoromethansulfonate (NaCF3SO3) salt in triethylene glycol dimethyl ether (TREGDME) solvent as suitable medium for application in Na-ion and Na-S cells. The study, performed by using various electrochemical techniques, including impedance spectroscopy, voltammetry, and galvanostatic cycling, indicates for the solution high ionic conductivity and sodium transference number (t +), suitable stability window, very low electrode/electrolyte interphase resistance and sodium stripping/deposition overvoltage. Direct exposition to flame reveals the remarkable safety of the solution due to missing fire evolution under the adopted experimental setup. The solution is further investigated in sodium cells using various electrodes, i.e., mesocarbon microbeads (MCMB), tin-carbon (Sn-C), and sulfur-multiwalled carbon nanotubes (S-MWCNTs). The results show suitable cycling performances, with stable capacity ranging from 90 mAh g −1 for MCMB to 140 mAh g −1 for Sn-C, and to 250 mAh g −1 for S-MWCNTs, as an important additional bonus for enhancing the battery safety level [29-31]. A room-temperature rechargeable sodium-ion battery was formed by coupling the layered P2-Na0.7CoO2 cathode with the graphite anode in an electrolyte formed by NaClO4 salt in tetraethylene glycol dimethyl (TEGDME) [32]. This rocking chair cell, operating though sodium intercalation/de-intercalation processes within the cathode and anode layers, has shown suitable electrode/electrolyte interphase, and excellent performance in terms of cycle life, efficiency, and power capability [32]. A rechargeable sodium-oxygen cell has been reported to efficiently operate at room temperature employing a cathode formed by multiwalled carbon nanotubes (MWCNTs) cast on a gas diffusion layer in a TEGDME-NaCF3SO3 electrolyte solution [33]. The above Na/O2 cell has shown charge-discharge polarization as low as 400 mV, a capacity of 500 mAh g −1 and an energy efficiency of 83% for several cycles [33]. Diethylene glycol dimethyl ether (DEGDME) dissolving NaCF3SO3 has been used as the electrolyte in a room temperature sodium-sulfur cell using a S-MWCNTs composite, revealing average working voltage of about 1.8 V and a specific capacity of the order of 500 mAh g −1 [17], while a sodium-ion cell combining nanostructured Sn-C anode and hollow carbon spheres-sulfur (HCS-S) cathode in a TEGDME-NaCF3SO3 electrolyte revealed remarkable capacity of 550 mAh g −1 and theoretical energy density of 550 Wh kg −1 [34]. These encouraging results have suggested the use of glyme-based electrolytes as the preferred electrolyte media for a series of very attracting energy storage systems based on sodium, including Na-ion, Na/S and Na/O2 batteries. Therefore, in this work we investigate a solution formed by dissolving NaCF3SO3 in triethylene glycol dimethyl ether (TREGDME) as suitable electrolyte for sodium battery. The solution is studied by various electrochemical techniques in order to determine its ionic conductivi...

show abstract

“…The doctor blade technique was applied to spread the slurry over the substrate of 454 μm thickness gas diffusion layer (GDL, ELAT LT 1400, FuelCellStore) to fabricate the cathode and 9 μm thickness Cu foil to fabricate the anode. The choice of GDL as a current collector was based on its better performance compared to the Al in Li cells of different chemical processes . Slurry‐coated foils were dried in an oven overnight at 50 °C.…”

Section: Methodsmentioning

confidence: 99%

“…The choice of GDL as ac urrent collector was based on its better performance compared to the Al in Li cells of different chemical processes. [32,33] Slurry-coated foils were dried in an oven overnight at 50 8C. The dried deposits were punched with am anual punching machine into 13 mm diameter discs for the half-cell system and 16 mm diameter discs for the full-cell system.…”

Section: Preparation Of Electrodes and Assembly Of The Cellsmentioning

confidence: 99%

Simple and Eco‐Friendly Fabrication of Electrode Materials and Their Performance in High‐Voltage Lithium‐Ion Batteries

et al. 2020

View full text Add to dashboard Cite

The huge consumption of rechargeable Li‐ion batteries (LIBs) make it necessary to recover and reuse the different components of spent batteries, thus favoring sustainable development. Graphite is a critical material in the manufacture of the current LIBs so recycling it should be prioritized in the management of spent batteries. In this work, graphite is manually recovered from spent batteries used in smartphones. The impurities from the different components of the batteries are drastically reduced by simple leaching with HCl. This treatment significantly improves the delivered specific capacity, with average values of 300 and 390 mAh g−1 without and with leaching, respectively. To test recycled graphite as an anode material in real cells, it is paired with LiNi0.5Mn1.5O4, the most promising cathode material for high‐voltage batteries. LiCl, produced directly by chlorination of spodumene, is used as the Li source to obtain the spinel sample. The real cell gives satisfactory values for both initial specific capacity (100 mAh g−1) and capacity retention after 100 cycles. These results are comparable to and in some cases even better than those for cells that use commercial graphite and conventional Li sources as primary raw materials. Moreover, the cell shows good performance during the rate capability test; the delivered capacity values decrease smoothly from 73 to 62 mAh g−1 while the rate increases from 0.1 to 1 C.

show abstract

The Role of Current Collector in Enabling the High Performance of Li/S Battery

Cited by 22 publications

References 42 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

Triglyme-based electrolyte for sodium-ion and sodium-sulfur batteries

Simple and Eco‐Friendly Fabrication of Electrode Materials and Their Performance in High‐Voltage Lithium‐Ion Batteries

Contact Info

Product

Resources

About