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Full-Text Articles in Engineering
A Conductive Polypyrrole-Coated, Sulfur-Carbon Nanotube Composite For Use In Lithium-Sulfur Batteries, Jianli Wang, Lin Lu, Dongqi Shi, Richard Tandiono, Zhaoxiang Wang, Konstantin Konstantinov, Hua Liu
A Conductive Polypyrrole-Coated, Sulfur-Carbon Nanotube Composite For Use In Lithium-Sulfur Batteries, Jianli Wang, Lin Lu, Dongqi Shi, Richard Tandiono, Zhaoxiang Wang, Konstantin Konstantinov, Hua Liu
Jianli Wang
A novel ternary composite, polypyrrole (PPy)-coated sulphur-carbon nanotube (S-CNT), is synthesised by using an in situ, one-pot method. Firstly, elemental sulfur is loaded into the CNT network by a solution-based processing technique. Then conducting PPy is coated on the surface of the S-CNT composite to form the S-CNT-PPy ternary composite by carrying out polymerization of the pyrrole monomer in situ. The ternary composite is tested as a cathode for lithium-sulfur batteries. The results show that PPy coating improves significantly the performance of the binary composites (S-CNT and S-PPy). The conducting PPy is believed to serve multiple functions in the composite: …
Sugar As An Optimal Carbon Source For The Enhanced Performance Of Mgb2 Superconductors At High Magnetic Fields, Olga Shcherbakova, Alexey Pan, Jianli Wang, Andrey Shcherbakov, S. Dou, David Wexler, E Babic, M Jercinovic, O Husnjak
Sugar As An Optimal Carbon Source For The Enhanced Performance Of Mgb2 Superconductors At High Magnetic Fields, Olga Shcherbakova, Alexey Pan, Jianli Wang, Andrey Shcherbakov, S. Dou, David Wexler, E Babic, M Jercinovic, O Husnjak
Jianli Wang
In this paper we report the results of an extended study of the effect of sugar doping on the structural and electromagnetic properties of MgB2 superconductors. High values of the upper critical field (Bc2) of 36 T and the irreversibility field (Birr) of 27 T have been estimated at the temperature of 5 K in a bulk MgB2 sample with the addition of 10 wt% of sugar. The critical current density (Jc(Ba)) of sugar-doped samples has been significantly improved in the high field region. The value of transport Jc has reached as high as 108 A m-2 at 10 T …