Three-dimensional wire-in-tube hybrids of tin dioxide and nitrogen-doped carbon for lithium ion battery applications

Cu2S@ N, S Dual‐Doped Carbon Matrix Hybrid as Superior Anode Materials for Lithium/Sodium ion Batteries

“…Figure A exhibits the first three cyclic voltammetry (CV) curves of the Cu 2 S@NSCm in a potential range of 0.01–3.0 V (vs. Na/Na + ) at a scan rate of 0.1 mV s −1 . During the initial cycle, there are four major reduction peaks can be observed, the peaks at 1.9, 1.5 and 1.1 V are attributed to Na + insertion into the Cu 2 S structure to generate Cu and Na 2 S. And the corresponding three oxidation peaks at (1.6), 1.8 and 2.2 V are associated with the reversible reaction of Cu and Na 2 S to form Cu 2 S. The three pairs of reduction/oxidation peaks exhibit the sodiation/desodiation process of Cu 2 S anode in SIBs is a multi‐step conversion reaction . There is another wide reduction peak between 0.2–0.8 V in the first scan which is related to the formation of the SEI film ,[18] and it disappears gradually in the subsequent scans.…”

Design and synthesis of coordination polymers with chelated units and their application in nanomaterials science

“…The direct thermal transformation of CPs was used for the preparation of porous carbons with special morphologies (for example, cube and polyhedron etc. ), [301][302][303] and their pore structures may be easily varied depending on the as-formed metal or metal oxide nano-sized particles. However, using thermolysis of CPs for the preparation of nanocomposites is restrained by their high cost.…”

Electrode Design for Lithium–Sulfur Batteries: Problems and Solutions

“…In the light of this situation, the electrodeposition method offers various virtues such as low cost, simplicity, and ecofriendliness. [ 104 ] The most important thing is to directly electrodeposit sulfur into conductive films or arrays hosts by such a method. The electrodeposition process renders strong chemical bonding between sulfur and host materials due to the electron/ion transfer at electrode/electrolyte interfaces.…”

“…The electrodeposition process renders strong chemical bonding between sulfur and host materials due to the electron/ion transfer at electrode/electrolyte interfaces. [ 104 ] Besides, the ionically and electronically insulating characteristics of sulfur impede excessive deposition of sulfur on conductive hosts, namely, self‐limitation effect. For example, Zhao et al [ 65 ] prepared sulfur nanodots on flexible nickel foam via electrodeposition as high‐performance cathode material for LSBs.…”

“…This one‐step electrodeposition of sulfur shortens the preparation time of cathode material and can be carried out at ambient temperature. It is reported that the S/Ni cathode exhibited excellent initial discharge capacity of 1458 mA h g −1 at 0.1 C. In recent years, Zhang et al [ 104 ] synthesized graphene–sulfur composites (GSCs) via combination of electrolytic exfoliating graphite rod anode with in situ electrodeposition of sulfur. A mixture of sulfuric acid, KOH, and sulfourea aqueous solution was utilized as the electrolyte.…”