Song, W;
Liu, X;
Wu, B;
Brandon, N;
Shearing, PR;
Brett, DJL;
Xie, F;
(2019)
Sn@C evolution from yolk-shell to core-shell in carbon nanofibers with suppressed degradation of lithium storage.
Energy Storage Materials
, 18
pp. 229-237.
10.1016/j.ensm.2018.12.012.
Preview |
Text
Shearing_Template-submit - Revise 2.pdf - Accepted Version Download (1MB) | Preview |
Abstract
Metallic Sn has high conductivity and high theoretical capacity for lithium storage but it suffers from severe volume change in lithiation/delithiation leading to capacity fade. Yolk-shell and core-shell Sn@C spheres interconnected by carbon nanofibers were synthesized by thermal vapor and thermal melting of electrospun nanofibers to improve the cycling stability. Sn particles in yolk-shell spheres undergo dynamic structure evolution during thermal melting to form core-shell spheres. The core-shell spheres linked along the carbon nanofibers show outstanding performance and are better than the yolk-shell system for lithium storage, with a high capacity retention of 91.8% after 1000 cycles at 1 A g-1. The superior structure of core-shell spheres interconnected by carbon nanofibers has facile electron conductivity and short lithium ion diffusion pathways through the carbon nanofibers and shells, and re-develops Sn@C structures with Sn clusters embedded into carbon matrix during electrochemical cycling, enabling the high performance.
| Type: | Article |
|---|---|
| Title: | Sn@C evolution from yolk-shell to core-shell in carbon nanofibers with suppressed degradation of lithium storage |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.ensm.2018.12.012 |
| Publisher version: | https://doi.org/10.1016/j.ensm.2018.12.012 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | n; yolk-shell; core-shell; nanofiber; lithium storage |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10111932 |
Archive Staff Only
 |
View Item |
