Unravelling the Behaviour of Layered X Li2MnO3 • (1-x) LiMO2 High Capacity Cathode Material Through Correlated Electrochemistry and Characterization of Single Particles

2013 ◽  
Keyword(s):  
Cathode Material ◽  
High Capacity ◽  
Single Particles

scholarly journals Lamellar Polypyrene Based on Attapulgite–Sulfur Composite for Lithium–Sulfur Battery

Membranes ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 483
Author(s):  
Jing Wang ◽  
Riwei Xu ◽  
Chengzhong Wang ◽  
Jinping Xiong
Keyword(s):  
Cathode Material ◽  
Current Density ◽  
High Current Density ◽  
Specific Capacity ◽  
Lithium Sulfur Batteries ◽  
Rate Test ◽  
Sulfur Battery ◽  
Lower Capacity ◽  
Lithium Sulfur

We report on the preparation and characterization of a novel lamellar polypyrrole using an attapulgite–sulfur composite as a hard template. Pretreated attapulgite was utilized as the carrier of elemental sulfur and the attapulgite–sulfur–polypyrrole (AT @400 °C–S–PPy) composite with 50 wt.% sulfur was obtained. The structure and morphology of the composite were characterized with infrared spectroscopy (IR), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). An AT @400 °C–S–PPy composite was further utilized as the cathode material for lithium–sulfur batteries. The first discharge specific capacity of this kind of battery reached 1175 mAh/g at a 0.1 C current rate and remained at 518 mAh/g after 100 cycles with capacity retention close to 44%. In the rate test, compared with the polypyrrole–sulfur (PPy–S) cathode material, the AT @400 °C–S–PPy cathode material showed lower capacity at a high current density, but it showed higher capacity when the current came back to a low current density, which was attributed to the “recycling” of pores and channels of attapulgite. Therefore, the lamellar composite with special pore structure has great value in improving the performance of lithium–sulfur batteries.

A high capacity thiospinel cathode for Mg batteries

2016 ◽  
Vol 9 (7) ◽  
pp. 2273-2277 ◽  
Author(s):  
Xiaoqi Sun ◽  
Patrick Bonnick ◽  
Victor Duffort ◽  
Miao Liu ◽  
Ziqin Rong ◽  
...  
Keyword(s):  
Cathode Material ◽  
High Capacity ◽  
Capacity Retention ◽  
Full Cell

A Mg full cell with a thiospinel cathode material shows 190 mA h g−1 capacity and relatively stable capacity retention.

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