A one-pot synthesis of hetero-Co9S8–NiS sheets on graphene to boost lithium–sulfur battery performance

2020 ◽  
Vol 7 (11) ◽  
pp. 2160-2167
Author(s):  
Liang Chen ◽  
Xuefang Xie ◽  
Zhian Zhang ◽  
Xiangzhong Kong ◽  
Shuquan Liang ◽  
...  
Keyword(s):  
Active Sites ◽  
One Pot ◽  
Lithium Sulfur Battery ◽  
Electrochemical Conversion ◽  
One Pot Synthesis ◽  
Sulfur Battery ◽  
Lithium Sulfur

Graphene decorated with hetero-Co9S8–NiS sheets have abundant active sites, which can efficiently catalyze the electrochemical conversion of lithium polysulfides in Li–S battery.

Integration of Binary Active Sites: Co 3 V 2 O 8 as Polysulfide Traps and Catalysts for Lithium‐Sulfur Battery with Superior Cycling Stability

Small ◽  
2020 ◽  
Vol 16 (18) ◽  
pp. 1907153 ◽  
Author(s):  
Linlin Zhang ◽  
Fang Wan ◽  
Hongmei Cao ◽  
Lili Liu ◽  
Yijing Wang ◽  
...  
Keyword(s):  
Active Sites ◽  
Cycling Stability ◽  
Lithium Sulfur Battery ◽  
Sulfur Battery ◽  
Superior Cycling Stability ◽  
Lithium Sulfur

scholarly journals Preparation and Electrochemical Performance of V2O5 @N-CNT/S Composite Cathode Materials

2021 ◽  
Vol 8 ◽  
Author(s):  
Cheng Liu ◽  
Meng Xiang ◽  
Haiyang Zhang ◽  
Shuaiqiang Feng ◽  
Jianrong Xiao ◽  
...  
Keyword(s):  
Composite Material ◽  
Electrochemical Performance ◽  
Active Sites ◽  
Composite Cathode ◽  
High Energy ◽  
Positive Electrode ◽  
High Energy Density ◽  
Lithium Sulfur Battery ◽  
Sulfur Battery ◽  
Lithium Sulfur

Lithium–sulfur battery hasreceived widespread attention because of its high energy density, low cost, environmental friendliness, and nontoxicity. However, the insulating properties of elemental sulfur, huge volume changes, and dissolution of polysulfides in electrolytes that result in the shuttle effect, low sulfur utilization, and low rate performance seriously hinder the commercialization of lithium–sulfur batteries. In this work, a composite material of nitrogen-doped multiwalled carbon nanotubes and V2O5 was designed and fabricated to serve as the positive electrode of lithium–sulfur battery via the hydrothermal method. The positive electrode of the V2O5@N-CNTs composite material could reach an initial discharge specific capacity of 1,453 mAh g−1at a rate of 0.1C. Moreover, the composite material could maintain a discharge ratio of 538 mAh g−1 at a rate of 0.5C even after 200 charge and discharge cycles. After 400 cycles, the composite had a specific discharge capacity of 439 mAh g−1 at a rate of 1.0C. The excellent electrochemical performance of the V2O5@N-CNT/S composite cathode material was due to the fact that V2O5 contains oxygen ions and has a strong polarized surface. Furthermore, nitrogen doping changed the hybrid structure of carbon atoms and provided additional active sites, thereby improving the conductivity of the material itself and effectively inhibiting the dissolution and diffusion of polysulfides.

Sign in / Sign up

Export Citation Format

Share Document