scholarly journals The Discharge Mechanism for Solid-State Lithium-Sulfur Batteries

MRS Advances ◽  
2019 ◽  
Vol 4 (49) ◽  
pp. 2627-2634 ◽  
Author(s):  
Erika Nagai ◽  
Timothy S. Arthur ◽  
Patrick Bonnick ◽  
Koji Suto ◽  
John Muldoon
Keyword(s):  
Solid Electrolyte ◽  
Carbon Fibers ◽  
Active Material ◽  
Discharge Mechanism ◽  
Electrochemical Lithiation ◽  
Lithium Sulfide ◽  
Electrochemically Active ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur ◽  
Synthesis Of Materials

AbstractThe electrochemical discharge mechanism is reported for all-solid lithium sulfur batteries. Upon milling with carbon fibers, the solid electrolyte used within the cathode composite becomes electrochemically active. Analysis with Raman spectroscopy and XPS revealed the importance of bridging S-S bond formation and breaking in lithium polysulfidophosphates during electrochemical lithiation of the active solid electrolyte. Remarkably, when sulfur is introduced as an active material in the cathode composite, lithium polysulfides are formed as an intermediate product before full lithiation into lithium sulfide. The synthesis of materials based on bridging S-S bonds is an important avenue to the design of new cathodes for all-solid batteries.

scholarly journals Synthesis of highly electrochemically active Li2S nanoparticles for lithium–sulfur-batteries

2015 ◽  
Vol 3 (31) ◽  
pp. 16307-16312 ◽  
Author(s):  
M. Kohl ◽  
J. Brückner ◽  
I. Bauer ◽  
H. Althues ◽  
S. Kaskel
Keyword(s):  
Melting Point ◽  
Carbothermal Reduction ◽  
Lithium Sulfate ◽  
High Discharge ◽  
Lithium Sulfide ◽  
Electrochemically Active ◽  
Lithium Sulfur Batteries ◽  
Source Particle ◽  
Discharge Capacities ◽  
Lithium Sulfur

Carbothermal reduction of lithium sulfate below its melting point was used to produce sub-micron sized lithium sulfide particles which retain the morphology of the source particle and achieve high discharge capacities up to 1360 mA h gsulfur−1.

Uniform Li2S precipitation on N,O-codoped porous hollow carbon fibers for high-energy-density lithium–sulfur batteries with superior stability

2016 ◽  
Vol 52 (73) ◽  
pp. 10964-10967 ◽  
Author(s):  
Long Qie ◽  
Arumugam Manthiram
Keyword(s):  
Carbon Fibers ◽  
Active Material ◽  
Current Collector ◽  
High Energy ◽  
High Energy Density ◽  
Lithium Sulfur Batteries ◽  
Hollow Carbon ◽  
Sulfur Cathodes ◽  
Lithium Sulfur

Long-term cycling stability with high-loading sulfur cathodes has been achieved using N,O-codoped carbon hollow fibers as the current collector and Li2S6 as the starting active material.

The formation of crystalline lithium sulfide on electrocatalytic surfaces in lithium–sulfur batteries

2021 ◽  
Author(s):  
Yun-Wei Song ◽  
Jin-Lei Qin ◽  
Chang-Xin Zhao ◽  
Meng Zhao ◽  
Li-Peng Hou ◽  
...  
Keyword(s):  
Lithium Sulfide ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur

Investigation of materials and convection for lithium sulfur batteries

2015 ◽  
Author(s):  
◽  
Donald A. Dornbusch
Keyword(s):  
Active Material ◽  
Lithium Ion ◽  
Metal Electrode ◽  
University Of Missouri ◽  
Lithium Sulfur Batteries ◽  
Before And After ◽  
Bet Theory ◽  
Comsol Simulation ◽  
The University ◽  
Lithium Sulfur

[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] The following dissertation investigates different aspects of lithium-sulfur batteries. Lithium-sulfur batteries have a higher theoretical capacity than current lithium-ion chemistries. First, a study on the lithium-metal electrode and the formation of dendrites investigates how flow impacts the failure from dendrites of these electrodes. Second, a study relying on charging to avoid the soluble intermediates generated through charge/discharge of sulfur-cathodes which are the primary cause of capacity fade in these systems. Third, sulfur is polymerized through radical polymerization with diene comonomers in order to reduce the solubility and mobility of the intermediates generated during cycling. Using Brunauer-Emmett-Teller (BET) theory, the surface area and pore volume can be observed before and after cycling demonstrating the amount of mobility the active material has during cycling. Finally, a study on the conduction phenomena in convection batteries is studied through a literature review and COMSOL simulation.

Facile Synthesis of Uniform Carbon Coated Li2S/rGO cathode for High-Performance Lithium-Sulfur Batteries

MRS Advances ◽  
2018 ◽  
Vol 3 (60) ◽  
pp. 3501-3506 ◽  
Author(s):  
Gaind P. Pandey ◽  
Joshua Adkins ◽  
Lamartine Meda
Keyword(s):  
High Performance ◽  
Active Material ◽  
Cycling Performance ◽  
High Energy ◽  
High Energy Density ◽  
Shell Nanostructures ◽  
Lithium Sulfur Batteries ◽  
Carbon Coated ◽  
Co Precipitation ◽  
Lithium Sulfur

ABSTRACTLithium sulfide (Li2S) is one of the most attractive cathode materials for high energy density lithium batteries as it has a high theoretical capacity of 1166 mA h g-1. However, Li2S suffers from poor rate performance and short cycle life due to its insulating nature and polysulfide shuttle during cycling. In this work, we report a facile and viable approach to address these issues. We propose a method to synthesize a Li2S based nanocomposite cathode material by dissolving Li2S as the active material, polyvinylpyrrolidone (PVP) as the carbon precursor, and graphene oxide (GO) as a matrix to enhance the conductivity, followed by a co-precipitation and high-temperature carbonization process. The Li2S/rGO cathode yields an exceptionally high initial capacity of 817 mAh g-1 based on Li2S mass at C/20 rate and also shows a good cycling performance. The carbon-coated Li2S/rGO cathode demonstrates the capability of robust core-shell nanostructures for different rates and improved capacity retention, revealing carbon coated Li2S/rGO composites as an outstanding system for high-performance lithium-sulfur batteries.

Construction of a stable lithium sulfide membrane to greatly confine polysulfides for high performance lithium–sulfur batteries

2018 ◽  
Vol 6 (18) ◽  
pp. 8655-8661 ◽  
Author(s):  
Chao Wu ◽  
Chunxian Guo ◽  
JingGao Wu ◽  
Wei Ai ◽  
Ting Yu ◽  
...  
Keyword(s):  
Discharge Current ◽  
High Performance ◽  
Material Surface ◽  
Lithium Sulfur Battery ◽  
Galvanostatic Discharge ◽  
Lithium Sulfide ◽  
Lithium Sulfur Batteries ◽  
Sulfur Battery ◽  
Lithium Sulfur

A stable lithium sulfide membrane is constructedin situto wrap the mixed sulfur/C material surface of a lithium–sulfur battery (LSB) by delicately tuning the galvanostatic discharge current.

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