An in situ encapsulation approach for polysulfide retention in lithium–sulfur batteries

2020 ◽  
Vol 8 (14) ◽  
pp. 6902-6907 ◽  
Author(s):  
Y. X. Ren ◽  
H. R. Jiang ◽  
C. Xiong ◽  
C. Zhao ◽  
T. S. Zhao
Keyword(s):  
Rate Capability ◽  
Carbon Composite ◽  
Cycle Life ◽  
Composite Cathodes ◽  
Lithium Sulfur Batteries ◽  
A Minor ◽  
Lithium Sulfur

An in situ encapsulation strategy is adopted for protecting sulfur/carbon composite cathodes, extending the cycle life with a minor sacrifice in the rate capability.

In situ sulfur deposition route to obtain sulfur–carbon composite cathodes for lithium–sulfur batteries

2014 ◽  
Vol 2 (12) ◽  
pp. 4316-4323 ◽  
Author(s):  
W. G. Wang ◽  
X. Wang ◽  
L. Y. Tian ◽  
Y. L. Wang ◽  
S. H. Ye
Keyword(s):  
Reversible Capacity ◽  
Carbon Composite ◽  
Cycle Performance ◽  
Carbon Composites ◽  
Stable Cycle ◽  
Sulfur Deposition ◽  
Composite Cathodes ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur

Sulfur–carbon composites were prepared by an in situ sulfur deposition route developed for the heterogeneous nucleation of sulfur into nanopores of conductive carbon black (CCB) by fumigation of Na2S4/CCB powder with HCl. The sulfur–carbon composites demonstrate enhanced reversible capacity and stable cycle performance.

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.

Improving the performance of PEDOT-PSS coated sulfur@activated porous graphene composite cathodes for lithium–sulfur batteries

2014 ◽  
Vol 2 (43) ◽  
pp. 18345-18352 ◽  
Author(s):  
Han Li ◽  
Minqiang Sun ◽  
Tao Zhang ◽  
Yuqian Fang ◽  
Gengchao Wang
Keyword(s):  
Rate Capability ◽  
Cycling Stability ◽  
Porous Graphene ◽  
Graphene Composite ◽  
Composite Cathodes ◽  
Lithium Sulfur Batteries ◽  
Good Cycling Stability ◽  
Lithium Sulfur

A novel PEDOT/S@aPG composite with good cycling stability and excellent rate capability is prepared.

Electrocatalysis of polysulfide conversion by conductive RuO2 nano dots for lithium–sulfur batteries

Nanoscale ◽  
2018 ◽  
Vol 10 (35) ◽  
pp. 16730-16737 ◽  
Author(s):  
Ruxing Wang ◽  
Kangli Wang ◽  
Shu Gao ◽  
Mao Jiang ◽  
Jing Han ◽  
...  
Keyword(s):  
Rate Capability ◽  
Catalytic Conversion ◽  
Cycle Life ◽  
Long Cycle ◽  
Long Cycle Life ◽  
Lithium Sulfur Batteries ◽  
First Time ◽  
Lithium Sulfur

Highly conductive RuO2 nano dots (NDs) are taken as an efficient anchor and catalytic conversion center of polysulfides for the first time, the designed RuO2@NMCs/S ternary electrodes possess superior rate capability and ultra-long cycle life.

Ultrafine nano-sulfur particles anchored on in situ exfoliated graphene for lithium–sulfur batteries

2017 ◽  
Vol 5 (19) ◽  
pp. 9412-9417 ◽  
Author(s):  
Zhaoling Ma ◽  
Li Tao ◽  
Dongdong Liu ◽  
Zhen Li ◽  
Yiqiong Zhang ◽  
...  
Keyword(s):  
Cycle Life ◽  
Dbd Plasma ◽  
Graphene Composite ◽  
Exfoliated Graphene ◽  
Lithium Sulfur Batteries ◽  
One Step ◽  
Lithium Sulfur

Ultrafine sulfur/graphene composite was synthesized in one step with the assistance of DBD plasma and showed enhanced cycle life in Li–S batteries.

Ad hoc solid electrolyte on acidized carbon nanotube paper improves cycle life of lithium–sulfur batteries

2017 ◽  
Vol 10 (12) ◽  
pp. 2544-2551 ◽  
Author(s):  
Guiyin Xu ◽  
Akihiro Kushima ◽  
Jiaren Yuan ◽  
Hui Dou ◽  
Weijiang Xue ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Solid Electrolyte ◽  
Ad Hoc ◽  
Cycling Performance ◽  
Cycle Life ◽  
Shuttle Effect ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur

The in situ polymerized solid barrier stops sulfur transport while still allowing bidirectional Li+ transport, alleviating the shuttle effect and increasing the cycling performance.

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