Multishelled Ni2P Microspheres as Multifunctional Sulfur Host 3D-Printed Cathode Materials Ensuring High Areal Capacity of Lithium–Sulfur Batteries

2021 ◽  
Vol 9 (17) ◽  
pp. 6097-6106
Author(s):  
Fan Zhang ◽  
Zhi Li ◽  
Tong Cao ◽  
Kai Qin ◽  
Qunjie Xu ◽  
...  
Keyword(s):  
Cathode Materials ◽  
Lithium Sulfur Batteries ◽  
3D Printed ◽  
Sulfur Host ◽  
Areal Capacity ◽  
Lithium Sulfur

Sulfur vacancies in Co9S8-x/N-doped graphene enhancing electrochemical kinetics to high-performance lithium sulfur batteries

2021 ◽  
Author(s):  
Haojie Li ◽  
Yihua Song ◽  
Kai Xi ◽  
Wei Wang ◽  
Sheng Liu ◽  
...  
Keyword(s):  
Cathode Materials ◽  
High Performance ◽  
Catalytic Conversion ◽  
High Energy ◽  
Electrochemical Kinetics ◽  
Lithium Sulfur Batteries ◽  
Doped Graphene ◽  
Sulfur Battery ◽  
Areal Capacity ◽  
Lithium Sulfur

A sufficient areal capacity is necessary for achieving high-energy lithium sulfur battery, which requires high enough sulfur loading in cathode materials. Therefore, kinetically fast catalytic conversion of polysulfide intermediates is...

scholarly journals Free-standing and binder-free highly N-doped carbon/sulfur cathodes with tailorable loading for high-areal-capacity lithium–sulfur batteries

2015 ◽  
Vol 3 (41) ◽  
pp. 20482-20486 ◽  
Author(s):  
A. Schneider ◽  
C. Suchomski ◽  
H. Sommer ◽  
J. Janek ◽  
T. Brezesinski
Keyword(s):  
High Loading ◽  
Carbon Paper ◽  
Free Standing ◽  
Lithium Sulfur Batteries ◽  
Binder Free ◽  
Sulfur Host ◽  
Sulfur Cathodes ◽  
Areal Capacity ◽  
Lithium Sulfur

A practical high-loading Li–S battery is realized by using free-standing and highly conductive N-doped carbon paper as sulfur host.

MgCo layered double hydroxide-based yolk shell polyhedrons as multifunctional sulfur mediator for lithium-sulfur batteries

2021 ◽  
Author(s):  
Kai Zhang ◽  
You Li ◽  
Hongyu Wang ◽  
Zisheng Zhang ◽  
Guihua Liu ◽  
...  
Keyword(s):  
Layered Double Hydroxide ◽  
High Discharge ◽  
Shuttle Effect ◽  
High Discharge Capacity ◽  
Host Materials ◽  
Lithium Sulfur Batteries ◽  
Sulfur Host ◽  
Double Hydroxide ◽  
Areal Capacity ◽  
Lithium Sulfur

Abstract The development of efficient sulfur host materials to address the shuttle effect issues of lithium polysulfides (LiPSs) is crucial in the lithium-sulfur (Li-S) batteries, but still challenging. In the present study, a novel yolk shell structured MgCo-LDH/ZIF-67 composite is designed as Li-S battery cathode. In this composite, the shell layer is MgCo layered double hydroxide constructed by partially etching ZIF-67 nanoparticle by Mg2+, and the core is the unreacted ZIF-67 particle. The unique yolk shell structure not only provides abundant pores for sulfur accommodation, but also facilitates the electrolyte penetration and ion transport. The ZIF-67 core exhibits strong polar adsorption to LiPSs through the Lewis acid-base interactions, and the micropores/mesoporous can further trap LiPSs. Meanwhile, the MgCo-LDH shell exposes enough sulfur-philic sites for enhancing chemisorption and catalyzes the LiPSs conversion. As a result, when MgCo-LDH/ZIF-67 is used as sulfur host in the cathode, the cell achieves a high discharge capacity of 1121 mAh g-1 at 0.2 C, and an areal capacity of 5.0 mAh cm-2 under the high sulfur loading of 5.8 mg cm-2. The S/MgCo-LDH/ZIF-67 electrode holds a promising potential for the development of Li-S batteries.

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.

Fe2O3/rGO/CNT composite sulfur host with physical and chemical dual-encapsulation for high performance lithium-sulfur batteries

2021 ◽  
Author(s):  
Wei Dong ◽  
meng lingqiang ◽  
zhao meina ◽  
yang fang ◽  
Ding Shen ◽  
...  
Keyword(s):  
Lithium Ion Battery ◽  
Cathode Materials ◽  
High Performance ◽  
Lithium Ion ◽  
Lithium Sulfur Battery ◽  
Lithium Sulfur Batteries ◽  
Sulfur Host ◽  
Physical And Chemical ◽  
Sulfur Battery ◽  
Lithium Sulfur

Lithium sulfur battery is one of the promising alternatives to traditional lithium-ion battery, but the dissolution of polysulfides and the low conductivity of cathode materials are two important factors for...

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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