Rational integration of spatial confinement and polysulfide conversion catalysts for high sulfur loading lithium–sulfur batteries

2020 ◽  
Vol 5 (4) ◽  
pp. 720-729 ◽  
Author(s):  
Qingfei Zhang ◽  
Zhensong Qiao ◽  
Xinrui Cao ◽  
Baihua Qu ◽  
Jin Yuan ◽  
...  
Keyword(s):  
Electron Transport ◽  
Reaction Kinetics ◽  
Spatial Confinement ◽  
Lithium Sulfur Batteries ◽  
Sulfur Host ◽  
Lithium Sulfur ◽  
High Sulfur Loading

A Co/N–PCNF@S cathode, formed via spatial confinement with a polar catalyst in a freestanding sulfur host, facilitates infiltration of electrolyte and electron transport, fixes LIPSs through strong chemisorption and catalyzes the reaction kinetics.

A conductive and ordered macroporous structure design of titanium oxide-based catalytic cathode for lithium-sulfur batteries

2021 ◽  
Author(s):  
Fan Liu ◽  
Yani Guan ◽  
Xiaohang Du ◽  
Guihua Liu ◽  
Daolai Sun ◽  
...  
Keyword(s):  
Active Site ◽  
Structure Design ◽  
Doped Tio2 ◽  
Lithium Sulfur Batteries ◽  
Sulfur Host ◽  
Ordered Macroporous ◽  
Kinetics Of ◽  
Areal Capacity ◽  
Lithium Sulfur ◽  
High Sulfur Loading

Abstract The application of lithium-sulfur (Li-S) batteries is hindered by the insulating characteristic of sulfur and slow reaction kinetics of lithium polysulfides. Here, we propose a three-dimensionally ordered macroporous (3DOM) structured conductive polar Ta-doped TiO2 framework with supported Co active site (CoTa@TiO2)to enhance the conversion kinetics of polysulfides. The 3DOM structure serves as an efficient sulfur host for the active sulfur through abundant pores and adsorption site. At the same time, the macropores can buffer the volume expansion of sulfur and enlarged mass transfer. The strong electrostatic attraction between Ti-O bond and polysulfide also promotes the adsorption of polysulfides. Moreover, the doped-Ta improves the conductivity of TiO2 by narrowing the band gap, whereas the supported Co can accelerate the catalytic transformation. Benefited from advanced structural designandsynergistic effect of Co and Ta doped TiO2, the Li-S cell with 3DOM CoTa@TiO2 cathode exhibits an impressive areal capacity of 3.4 mAh cm-2 under a high sulfur loading of 5.1 mg cm-2. This work provides an alternative strategy for the development of carbon-based cathode materials for lithium-sulfur batteries.

scholarly journals Co,N-co-doped graphene sheet as a sulfur host for high-performance lithium–sulfur batteries

RSC Advances ◽  
2022 ◽  
Vol 12 (3) ◽  
pp. 1375-1383
Author(s):  
Haili Zhao ◽  
Peng Chen ◽  
Yu Fan ◽  
Junkai Zhang ◽  
HongSheng Jia ◽  
...  
Keyword(s):  
Reaction Kinetics ◽  
Graphene Sheet ◽  
High Performance ◽  
Two Dimensional ◽  
Lithium Sulfur Batteries ◽  
Doped Graphene ◽  
Sulfur Host ◽  
Co Doped ◽  
Lithium Sulfur

Design of two-dimensional graphene with dispersed Co–N catalysts as a multifunctional S holding material in Li–S batteries to improve the retention of LiPSs and accelerate the reaction kinetics.

Macroporous Multichannel Carbon Nanofibers Embedded with Co/Fe‐N Electrocatalyst as the Sulfur Host for Boosting Polysulfides Conversion in Lithium‐Sulfur Batteries

2021 ◽  
Vol 6 (24) ◽  
pp. 5932-5940
Author(s):  
Zhiliang Zhang ◽  
Jie Xu ◽  
Waqas Ahmed ◽  
Weiqiang Tang ◽  
Dongfang Niu ◽  
...  
Keyword(s):  
Carbon Nanofibers ◽  
Lithium Sulfur Batteries ◽  
Sulfur Host ◽  
Lithium Sulfur
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