Safer lithium–sulfur battery based on nonflammable electrolyte with sulfur composite cathode

2018 ◽  
Vol 54 (33) ◽  
pp. 4132-4135 ◽  
Author(s):  
Huijun Yang ◽  
Qinyu Li ◽  
Cheng Guo ◽  
Ahmad Naveed ◽  
Jun Yang ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Composite Cathode ◽  
Triethyl Phosphate ◽  
Lithium Sulfur Battery ◽  
Sulfur Battery ◽  
Lithium Sulfur ◽  
Nonflammable Electrolyte

Nonflammable solvent triethyl phosphate (TEP) is firstly used as co-solvent in Li–S batteries to satisfy the demand for safety and electrochemical performance.

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.

Electrochemical Behaviors of Sulfurized-Polyacrylonitrile with Synthesized Polyacrylonitrile Precursors Based on the Radical Polymerization Through Monomer Acrylonitrile

2020 ◽  
Vol 20 (3) ◽  
pp. 1578-1588
Author(s):  
Si-Huang Peng ◽  
Shan-Shan Yao ◽  
Si-Kang Xue ◽  
Xin-Ye Qian ◽  
Xiang-Qian Shen ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Electrochemical Performance ◽  
Radical Polymerization ◽  
Molecular Weight Distribution ◽  
Weight Distribution ◽  
Infrared Spectrometry ◽  
Lithium Sulfur Battery ◽  
Composite Cathodes ◽  
Sulfur Battery ◽  
Lithium Sulfur

Polyacrylonitrile (PAN) precursors have been polymerized at different radical polymerization temperatures for preparing sulfurized-polyacrylonitrile (S-PAN) composite cathodes in rechargeable lithium sulfur battery. The physical properties of these composites have been investigated using X-ray diffraction, Fourier transform infrared spectrometry, Raman spectroscopy, Brunner-Emmet-Teller measurement and Gel permeation chromatography analysis. The electrochemical performance of the S-PAN composite cathodes made from the PAN precursor was investigated. The results showed that the molecular weight distribution of the PAN precursors affected the electrochemical performance of the S-PAN made from the PAN precursor. S-PAN composites derived from PAN with a narrower molecular weight distribution at 65 °C were exhibit the best electrochemical performance in lithium-sulfur battery.

Enhance electrochemical performance of lithium sulfur battery through a solution-based processing technique

2012 ◽  
Vol 202 ◽  
pp. 389-393 ◽  
Author(s):  
Kefei Li ◽  
Bei Wang ◽  
Dawei Su ◽  
Jinsoo Park ◽  
Hyojun Ahn ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Processing Technique ◽  
Lithium Sulfur Battery ◽  
Sulfur Battery ◽  
Lithium Sulfur

Effect of Organic Additives in Electrolytes for Rechargeable Lithium/Sulfur Battery

2005 ◽  
Vol 486-487 ◽  
pp. 610-613 ◽  
Author(s):  
Jin Kyu Kim ◽  
Jae Won Choi ◽  
Yeon Hwa Kim ◽  
Jong Uk Kim ◽  
Jou Hyeon Ahn
Keyword(s):  
Electrochemical Performance ◽  
Active Material ◽  
Mixed Electrolytes ◽  
Organic Additives ◽  
Organic Electrolytes ◽  
Lithium Sulfur Battery ◽  
Sulfur Battery ◽  
Lithium Sulfur

The effect of mixed electrolytes and organic additives on the electrochemical performance of rechargeable lithium/sulfur battery is investigated. The mixture of organic electrolytes, DME, DIG, TEGDME, and DIOX, was prepared to have appropriate composition, and to the electrolyte were added various organic additives, such as toluene, γ-butyrolactone, and MA. They showed an improved cyclic efficiency of lithium/sulfur battery and made utilization of active material, sulfur, more effective.

Sign in / Sign up

Export Citation Format

Share Document