Improving the capacity of lithium–sulfur batteries by tailoring the polysulfide adsorption efficiency of hierarchical oxygen/nitrogen-functionalized carbon host materials

2017 ◽  
Vol 19 (12) ◽  
pp. 8349-8355 ◽  
Author(s):  
Artur Schneider ◽  
Jürgen Janek ◽  
Torsten Brezesinski
Keyword(s):  
Adsorption Capacity ◽  
Reversible Capacity ◽  
Adsorption Efficiency ◽  
Host Materials ◽  
Lithium Polysulfide ◽  
Lithium Sulfur Batteries ◽  
Hierarchical Carbon ◽  
Lithium Sulfur

O/N-functionalization of hierarchical carbon is demonstrated to be effective in enhancing the adsorption capacity for lithium polysulfide and thus the reversible capacity of Li–S cells.

Porous TiO2−x with oxygen deficiency as sulfur host for lithium–sulfur batteries

2021 ◽  
pp. 2143004
Author(s):  
Yuman Yang ◽  
Yi Zhang ◽  
Meng Yang ◽  
Xiangyu Zhao
Keyword(s):  
Oxygen Deficiency ◽  
Reversible Capacity ◽  
Polar Compounds ◽  
High Specific Surface Area ◽  
Chemical Adsorption ◽  
Sulfur Species ◽  
Host Materials ◽  
Lithium Sulfur Batteries ◽  
Sulfur Host ◽  
Lithium Sulfur

The dissolution and shuttle behavior of lithium polysulfides has been considered to be one of the serious problems restricting the development of lithium−sulfur (Li–S) batteries. Polar compounds are regarded as promising sulfur host materials due to their strong chemical adsorption to lithium polysulfides. Herein, polar TiO[Formula: see text] with porous structure is employed as the sulfur host, which has a high specific surface area and provides nanoconfined space for storage and adsorption of sulfur species. As a result, the as-prepared S@TiO[Formula: see text] cathode exhibits significantly enhanced reversible capacity, cycling stability, and reaction kinetics compared to those of the as-prepared S@TiO2 cathode.

Sulfur nanoparticles/Ti3C2Tx MXene with optimum sulfur content as cathode for highly stable lithium-sulfur batteries

2021 ◽  
Author(s):  
Aoning Wang ◽  
Yixuan Chen ◽  
Li Liu ◽  
Xiang Liu ◽  
Zhoulu Wang ◽  
...  
Keyword(s):  
Energy Density ◽  
Titanium Carbide ◽  
Capacity Fading ◽  
Shuttle Effect ◽  
Host Materials ◽  
Lithium Polysulfide ◽  
Lithium Sulfur Batteries ◽  
Sulfur Host ◽  
Lithium Sulfur ◽  
Sulfur Nanoparticles

Lithium-sulfur batteries have high theoretical energy density, but they need better sulfur host materials to retain lithium polysulfide shuttle effect which result in batteries’ capacity fading. Titanium carbide MXene (Ti3C2Tx...

scholarly journals Effective ion pathways and 3D conductive carbon networks in bentonite host enable stable and high-rate lithium–sulfur batteries

2021 ◽  
Vol 10 (1) ◽  
pp. 20-33
Author(s):  
Lian Wu ◽  
Yongqiang Dai ◽  
Wei Zeng ◽  
Jintao Huang ◽  
Bing Liao ◽  
...  
Keyword(s):  
Network Architecture ◽  
High Performance ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
High Rate ◽  
Lithium Sulfur Batteries ◽  
Carbon Networks ◽  
Carbon Coated ◽  
Lithium Sulfur ◽  
Initial Capacity

Abstract Fast charge transfer and lithium-ion transport in the electrodes are necessary for high performance Li–S batteries. Herein, a N-doped carbon-coated intercalated-bentonite (Bent@C) with interlamellar ion path and 3D conductive network architecture is designed to improve the performance of Li–S batteries by expediting ion/electron transport in the cathode. The interlamellar ion pathways are constructed through inorganic/organic intercalation of bentonite. The 3D conductive networks consist of N-doped carbon, both in the interlayer and on the surface of the modified bentonite. Benefiting from the unique structure of the Bent@C, the S/Bent@C cathode exhibits a high initial capacity of 1,361 mA h g−1 at 0.2C and achieves a high reversible capacity of 618.1 m Ah g−1 at 2C after 500 cycles with a sulfur loading of 2 mg cm−2. Moreover, with a higher sulfur loading of 3.0 mg cm−2, the cathode still delivers a reversible capacity of 560.2 mA h g−1 at 0.1C after 100 cycles.

Hierarchical multi-component nanofiber separators for lithium polysulfide capture in lithium–sulfur batteries: an experimental and molecular modeling study

2016 ◽  
Vol 4 (35) ◽  
pp. 13572-13581 ◽  
Author(s):  
Jiadeng Zhu ◽  
Erol Yildirim ◽  
Karim Aly ◽  
Jialong Shen ◽  
Chen Chen ◽  
...  
Keyword(s):  
Molecular Modeling ◽  
Nanofiber Membrane ◽  
Molecular Modeling Study ◽  
Lithium Polysulfide ◽  
Lithium Sulfur Batteries ◽  
Overall Performance ◽  
Lithium Sulfur ◽  
Modeling Study

A multi-functional nanofiber membrane significantly improves the overall performance of Li–S batteries.

An In Situ Generated Polymer Electrolyte via Anionic Ring-Opening Polymerization for Lithium-Sulfur Batteries

2021 ◽  
Author(s):  
Quinton J Meisner ◽  
Sisi Jiang ◽  
Pengfei Cao ◽  
Tobias Glossmann ◽  
Andreas Hintennach ◽  
...  
Keyword(s):  
Polymer Electrolytes ◽  
Ring Opening ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Lithium Polysulfide ◽  
Lithium Sulfur Batteries ◽  
Anionic Ring ◽  
Lithium Sulfur ◽  
Interfacial Impedance

The use of solid polymer electrolytes has previously proven to be an effective approach to address the lithium polysulfide dissolution and high electrode interfacial impedance of Li-S batteries via an...

Regulating the d band in WS2@NC hierarchical nanospheres for efficient lithium polysulfide conversion in lithium-sulfur batteries

2021 ◽  
Vol 56 ◽  
pp. 343-352 ◽  
Author(s):  
Jintao Liu ◽  
Shuhao Xiao ◽  
Le Chang ◽  
Long Lai ◽  
Rui Wu ◽  
...  
Keyword(s):  
Lithium Polysulfide ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur

A soluble single atom catalyst promotes lithium polysulfide conversion in lithium sulfur batteries

2019 ◽  
Vol 55 (80) ◽  
pp. 12056-12059 ◽  
Author(s):  
Zhenpu Shi ◽  
Lan Wang ◽  
Huifang Xu ◽  
Junqiang Wei ◽  
Hongyun Yue ◽  
...  
Keyword(s):  
Single Atom ◽  
Lithium Polysulfide ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur

CoPcCl catalyzed the Li2S decomposition and enhanced the sulfur utilization remarkably.

scholarly journals Cathode porosity is a missing key parameter to optimize lithium-sulfur battery energy density

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Ning Kang ◽  
Yuxiao Lin ◽  
Li Yang ◽  
Dongping Lu ◽  
Jie Xiao ◽  
...  
Keyword(s):  
Energy Density ◽  
Lithium Ion ◽  
Carbon Matrix ◽  
Reversible Capacity ◽  
High Energy ◽  
Carbon Composite ◽  
Composite Cathodes ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur ◽  
Key Parameter

Abstract While high sulfur loading has been pursued as a key parameter to build realistic high-energy lithium-sulfur batteries, less attention has been paid to the cathode porosity, which is much higher in sulfur/carbon composite cathodes than in traditional lithium-ion battery electrodes. For high-energy lithium-sulfur batteries, a dense electrode with low porosity is desired to minimize electrolyte intake, parasitic weight, and cost. Here we report the profound impact on the discharge polarization, reversible capacity, and cell cycling life of lithium-sulfur batteries by decreasing cathode porosities from 70 to 40%. According to the developed mechanism-based analytical model, we demonstrate that sulfur utilization is limited by the solubility of lithium-polysulfides and further conversion from lithium-polysulfides to Li2S is limited by the electronically accessible surface area of the carbon matrix. Finally, we predict an optimized cathode porosity to maximize the cell level volumetric energy density without sacrificing the sulfur utilization.

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