Back to Search
Start Over
Effects of annealing temperature on electrochemical performance of SnSx embedded in hierarchical porous carbon with N-carbon coating by in-situ structural phase transformation as anodes for lithium ion batteries
- Source :
- Journal of Materials Science & Technology. 84:191-199
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Tuned tin chalcogenides rooted in hierarchical porous carbon (HPC) with N-carbon coating layers are prepared by thermal shock under various temperatures (denoted as HPC-SnS2-PAN-Various T). With the increase of annealing temperature, the morphology and phase structure of SnS2, as well as the cyclization degree of polyacrylonitrile (PAN), are significantly changed, which leads to the formation of rod-like SnS and ordered structure of conductive N-carbon layer. By combining HPC, N-carbon coating derived from the cyclization of PAN, with 1D SnS nanorods generated from structural phase transformation of SnS2, the optimized composite (HPC-SnS2-PAN-500) as anode for lithium ion batteries (LIBs) provides buffer space for volume changes during alloying/dealloying process, builds a highly conductive network as well as decreases irreversible capacity from solid electrolyte interphase and enhances the ion/electron transport. Attributed to the above merits from composition regulation and architecture modification by sulfur depletion and PAN cyclization, this target anode exhibits an extraordinary cycling stability with a high specific capacity of 652.5 mA h/g at 0.5 A/g after 900 cycles. It suggests that rod-like SnS embedded in HPC with cyclized PAN layers by thermal treatment approach renders a potential structural design of anode materials for LIBs.
- Subjects :
- Materials science
Polymers and Plastics
Annealing (metallurgy)
chemistry.chemical_element
02 engineering and technology
Thermal treatment
Electrolyte
engineering.material
010402 general chemistry
01 natural sciences
chemistry.chemical_compound
Coating
Phase (matter)
Materials Chemistry
Mechanical Engineering
Metals and Alloys
Polyacrylonitrile
021001 nanoscience & nanotechnology
0104 chemical sciences
Anode
chemistry
Chemical engineering
Mechanics of Materials
Ceramics and Composites
engineering
Lithium
0210 nano-technology
Subjects
Details
- ISSN :
- 10050302
- Volume :
- 84
- Database :
- OpenAIRE
- Journal :
- Journal of Materials Science & Technology
- Accession number :
- edsair.doi...........1b0d6734597d8d8e8ee98671b4c1a86f