Single Atom‐Based Nanoarchitectured Electrodes for High‐Performance Lithium–Sulfur Batteries

2021 ◽  
Vol 8 (8) ◽  
pp. 2002159
Author(s):  
Jie Wang ◽  
Bing Ding ◽  
Xiangjun Lu ◽  
Hiroki Nara ◽  
Yoshiyuki Sugahara ◽  
...  
Keyword(s):  
High Performance ◽  
Single Atom ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur

scholarly journals Dual-Atoms Iron Sites Boost the Kinetics of Reversible Conversion of Polysulfide for High-Performance Lithium-Sulfur Batteries

2021 ◽  
Author(s):  
Yue Qiu ◽  
Xun Sun ◽  
Maoxu Wang ◽  
Xian Wu ◽  
Bo Jiang ◽  
...  
Keyword(s):  
High Performance ◽  
Iron Catalyst ◽  
High Rate ◽  
Single Atom ◽  
Efficient Catalyst ◽  
Shuttle Effect ◽  
Adsorption Structure ◽  
Lithium Sulfur Batteries ◽  
Kinetics Of ◽  
Lithium Sulfur

Abstract Atomically dispersed metal catalysts have offered significant potential for accelerating sluggish kinetics of transformation of lithium polysulfide(LiPS) and inhibiting the shuttle effect to achieve the long-life cycling and high rate of lithium sulfur batteries. However, the end-on adsorption structure between single metal site and polysulfide limits the adsorption capacity and catalytic activity of single atom catalysts. Here, we construct dual-atoms iron sites on nitrogen doped graphene to serve as highly efficient catalyst for lithium sulfur batteries. As expected, the dual-atoms sites can firmly bound polysulfides by forming double Fe-S bonds between polysulfides and the two adjacent iron atoms. Such double-bond adsorption structure is also favorable for the electron transfer and polysulfides activation, so as to reduce the energy barrier and accelerate the reaction kinetics. As a result, the as-obtained dual-atoms iron catalyst can effectively alleviate the shuttle effect and improve the utilization of active sulfur, thus the batteries present high initial capacity of 1615 mAh g-1 at 0.05 C and long-cycle life with a decay rate per cycle as low as 0.015% at 2C over 1000 cycles.

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...

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