scholarly journals Construction of KB@ZIF-8/PP Composite Separator for Lithium–Sulfur Batteries with Enhanced Electrochemical Performance

Polymers ◽  
2021 ◽  
Vol 13 (23) ◽  
pp. 4210
Author(s):  
Bingyi Ma ◽  
Xin Zhang ◽  
Xiaoqian Deng ◽  
Sheng Huang ◽  
Min Xiao ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Retention Rate ◽  
High Capacity ◽  
Base Interaction ◽  
Shuttle Effect ◽  
Lithium Sulfur Batteries ◽  
New Strategy ◽  
Composite Separator ◽  
Enhanced Electrochemical Performance ◽  
Lithium Sulfur

Lithium–sulfur batteries (LSBs) have attracted wide attention, but the shuttle effect of polysulfide hinders their further practical application. Herein, we develop a new strategy to construct a Ketjen black@zeolite imidazole framework-8/polypropylene composite separator. Such a separator consists of Ketjen black (KB), zeolite imidazole framework-8 (ZIF-8) and polypropylene (PP) with a low coating load of 0.06 mg cm−2 and is denoted as KB@ZIF-8/PP. KB@ZIF-8/PP can absorb polysulfides because of the Lewis acid-base interaction between ZIF-8 and polysulfides. This interaction can reduce the dissolution of polysulfides and suppress the shuttle effect, thereby enhancing the electrochemical performance of the battery. When tested at a current density of 0.1 C, an LSB with a KB@ZIF-8/PP separator exhibits low polarization and achieves a high initial capacity of 1235.6 mAh/g and a high capacity retention rate of 59.27% after 100 cycles.

Separator modified by Ketjen black for enhanced electrochemical performance of lithium–sulfur batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (17) ◽  
pp. 13680-13685 ◽  
Author(s):  
Di Zhao ◽  
Xinye Qian ◽  
Lina Jin ◽  
Xiaolong Yang ◽  
Shanwen Wang ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Cathode Side ◽  
Electrochemical Performances ◽  
Lithium Sulfur Batteries ◽  
Enhanced Electrochemical Performance ◽  
Lithium Sulfur

A routine separator modified by a Ketjen black (KB) layer on the cathode side has been investigated to improve the electrochemical performances of Li–S batteries.

scholarly journals Three-Dimensionally Ordered Macroporous ZnO Framework as Dual-Functional Sulfur Host for High-Efficiency Lithium–Sulfur Batteries

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2267
Author(s):  
Haisheng Han ◽  
Tong Wang ◽  
Yongguang Zhang ◽  
Arailym Nurpeissova ◽  
Zhumabay Bakenov
Keyword(s):  
High Efficiency ◽  
High Capacity ◽  
Active Surface ◽  
Active Surface Area ◽  
Shuttle Effect ◽  
Dual Functional ◽  
Lithium Sulfur Batteries ◽  
Sulfur Host ◽  
Ordered Macroporous ◽  
Lithium Sulfur

A three-dimensionally ordered macroporous ZnO (3DOM ZnO) framework was synthesized by a template method to serve as a sulfur host for lithium–sulfur batteries. The unique 3DOM structure along with an increased active surface area promotes faster and better electrolyte penetration accelerating ion/mass transfer. Moreover, ZnO as a polar metal oxide has a strong adsorption capacity for polysulfides, which makes the 3DOM ZnO framework an ideal immobilization agent and catalyst to inhibit the polysulfides shuttle effect and promote the redox reactions kinetics. As a result of the stated advantages, the S/3DOM ZnO composite delivered a high initial capacity of 1110 mAh g−1 and maintained a capacity of 991 mAh g−1 after 100 cycles at 0.2 C as a cathode in a lithium–sulfur battery. Even at a high C-rate of 3 C, the S/3DOM ZnO composite still provided a high capacity of 651 mAh g−1, as well as a high areal capacity (4.47 mAh cm−2) under high loading (5 mg cm−2).

Shuttle confinement of lithium polysulfides in borocarbonitride nanotubes with enhanced performance for lithium–sulfur batteries

2020 ◽  
Vol 8 (1) ◽  
pp. 296-304 ◽  
Author(s):  
Mingzhi Yang ◽  
Dong Shi ◽  
Xiucai Sun ◽  
Yanlu Li ◽  
Zhenyan Liang ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Lithium Sulfur Batteries ◽  
Physical And Chemical ◽  
Enhanced Electrochemical Performance ◽  
Lithium Sulfur

Borocarbonitride nanotubes show efficient physical and chemical anchoring and conversion of lithium polysulfides, ensuring the enhanced electrochemical performance in lithium–sulfur batteries.

Hollow polyaniline sphere@sulfur composites for prolonged cycling stability of lithium–sulfur batteries

2014 ◽  
Vol 2 (27) ◽  
pp. 10350-10354 ◽  
Author(s):  
Guoqiang Ma ◽  
Zhaoyin Wen ◽  
Jun Jin ◽  
Yan Lu ◽  
Xiangwei Wu ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Volume Expansion ◽  
Cycling Stability ◽  
Sulfur Cathode ◽  
Shuttle Effect ◽  
Excellent Electrochemical Performance ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur

Sulfur cathode with excellent electrochemical performance based on hollow PANI spheres, which can suppress the shuttle effect and buffer the volume expansion.

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