A lithium–sulfur cathode with high sulfur loading and high capacity per area: a binder-free carbon fiber cloth–sulfur material

Liu, Miao; Wang, Weikun; Yuan, Ke; Yang, Yusheng; Wang, Anbang

doi:10.1039/c4cc03410d

Cited by 192 publications

(124 citation statements)

References 17 publications

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“…in-situ on the electrode prevent further dissolution of lithium polysulfides from the cathode [3,31] due to the common-ion effect, similar to the results of deliberately adding lithium polysulfides to the electrolyte [32][33][34].…”

Section: Resultssupporting

confidence: 62%

Absorption mechanism of carbon-nanotube paper-titanium dioxide as a multifunctional barrier material for lithium-sulfur batteries

Yuan

Tao

et al. 2015

Nano Res.

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Lithium-sulfur batteries attract much interest as energy storage devices for their low cost, high specific capacity, and energy density. However, the insulating properties of sulfur and high solubility of lithium polysulfides decrease the utilization of active materials by the battery resulting in poor cycling performance. Herein, we design a multifunctional carbon-nanotube paper/titanium-dioxide barrier which effectively reduces active material loss and suppresses the diffusion of lithium polysulfides to the anode, thereby improving the cycling stability of lithium-sulfur batteries. Using this barrier, an activated carbon/sulfur cathode with 70% sulfur content delivers stable cycling performance and high Coulombic efficiency (~99%) over 250 cycles at a current rate of 0.5 C. The improved electrochemical performance is attributed to the synergistic effects of the carbon nanotube paper and titanium dioxide, involving the physical barrier, chemical adsorption from the binding formation of Ti-S and S-O, and other interactions unique to the titanium dioxide and sulfur species.

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Section: Resultssupporting

confidence: 62%

Absorption mechanism of carbon-nanotube paper-titanium dioxide as a multifunctional barrier material for lithium-sulfur batteries

Yuan

Tao

et al. 2015

Nano Res.

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“…The capacity recovery process might be related to electrolyte and polysulfide distribution process, which is commonly observed in Li-S cells at higher rates. [26][27][28] However, long-term cycling performance should still be reliable in the comparison between different sulfur electrode architectures because of the traverse of the initial electrolyte wetting process. The above data demonstrate the importance of uniform TiS 2 distribution within the sulfur electrode.…”

Section: Resultsmentioning

confidence: 99%

Interaction of TiS₂and Sulfur in Li-S Battery System

Sun

Zhang

Bock

et al. 2017

J. Electrochem. Soc.

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With the ability to adsorb polysulfide, electronically conductive and electrochemically active TiS 2 is an effective multifunctional cathode additive to improve Li-S battery cycling performance. By using X-ray Photoelectron Spectroscopy (XPS), direct evidence is obtained to demonstrate the strong interaction between Li-polysulfide and TiS 2 . The observation of Li signature on Li 2 S 8 treated TiS 2 proves that the TiS 2 possesses the ability to adsorb Li-polysulfides species on its surface. An electron density transfer from Ti to Li and S is identified based on the positions of the peaks in the XPS spectrum before and after the interaction, which is consistent with the theoretically predicted polysulfide-TiS 2 interaction models in the literature. TiS 2 sample with 2.5x higher BET surface area is obtained by milling the raw TiS 2 particles and used as cathode additive in the sulfur electrode. In the presence of TiS 2 additive, long cycle life and improved sulfur utilization of Li-S cells under high rate discharge are demonstrated. In addition, we find that a uniform TiS 2 distribution in the sulfur-TiS 2 hybrid electrode is vital in determining its effectiveness in enhancing the performance of sulfur electrodes. Therefore, processing method and condition should be very important considerations in future development of sulfur electrodes with TiS 2 additive. The Li-S battery is one of the major frontiers in energy storage research. It has been well known for its high theoretical gravimetric capacity 1675 mA g −1 and energy density 2600 kWh kg −1 , and this can hardly be matched by any of the current Li-ion battery chemistries. 1,2However, the tendency for partially reduced sulfur to form soluble polysulfides that lead to fast capacity fade and low coulombic efficiency, the insulating nature of sulfur and Li 2 S, and the considerable volume change ∼80% between these two end products all put inevitable constraints on electrode architecture and cell level designs in attempts to approach or achieve these appealing theoretical values. 1-3Based on the discoveries in the last 10 years it has been found that cathode architecture is vital and active sulfur must be either pre-confined into a conductive host least permeable to polysulfide dissolution [4][5][6][7] or an strongly polysulfide binding compound should be dispersed into the cathode network, [8][9][10][11][12][13] otherwise both the utilization of sulfur and cycling performance will suffer. Furthermore, the combination of the above two approaches is also reported.14,15 Generally these measures increase the inactive component ratio and compromise energy density.Recently, it has been found that inclusion of electronically conductive TiS 2 16 into sulfur electrode helps to improve both the cycle life and high rate performance of Li-S cells. [17][18][19][20] Theoretical and indirect experimental evidences all suggest that TiS 2 potentially have surficial affinity for polysulfides, which make it an ideal mediator for active material loss. More importantly, TiS 2 distin...

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“…Li 2 S 2 /Li 2 S. 21,22 A discharge capacity of 1116 mAh g -1 (4.96 mAh cm -2 ) is obtained practically, which is about 67 % of theoretical value. Thus, the use of NWC as a current collector allows for high practical areal capacity to be reached, especially much higher as compared to what is usually reported in the literature, 23 or as compared with our reference Al-based composite electrode, which delivered ~650 mAh g -1 only (2.5 mAh cm -2 ) for similar sulfur loading of ~4.4 mg sulfur cm -2 (Fig. 2).…”

Section: Resultsmentioning

confidence: 76%

Investigation of non-woven carbon paper as a current collector for sulfur positive electrode—Understanding of the mechanism and potential applications for Li/S batteries

Waluś

Barchasz

Bouchet

et al. 2016

Electrochimica Acta

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A lithium–sulfur cathode with high sulfur loading and high capacity per area: a binder-free carbon fiber cloth–sulfur material

Cited by 192 publications

References 17 publications

Absorption mechanism of carbon-nanotube paper-titanium dioxide as a multifunctional barrier material for lithium-sulfur batteries

Absorption mechanism of carbon-nanotube paper-titanium dioxide as a multifunctional barrier material for lithium-sulfur batteries

Interaction of TiS₂and Sulfur in Li-S Battery System

Investigation of non-woven carbon paper as a current collector for sulfur positive electrode—Understanding of the mechanism and potential applications for Li/S batteries

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A lithium–sulfur cathode with high sulfur loading and high capacity per area: a binder-free carbon fiber cloth–sulfur material

Cited by 192 publications

References 17 publications

Absorption mechanism of carbon-nanotube paper-titanium dioxide as a multifunctional barrier material for lithium-sulfur batteries

Absorption mechanism of carbon-nanotube paper-titanium dioxide as a multifunctional barrier material for lithium-sulfur batteries

Interaction of TiS2and Sulfur in Li-S Battery System

Investigation of non-woven carbon paper as a current collector for sulfur positive electrode—Understanding of the mechanism and potential applications for Li/S batteries

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Interaction of TiS₂and Sulfur in Li-S Battery System