| Title | SnO2 nanoparticles anchored on carbon foam as a freestanding anode for high performance potassium-ion batteries |
| Authors | Qiu, Hailong Zhao, Lina Asif, Muhammad Huang, Xiaoxiao Tang, Tianyu Li, Wei Zhang, Teng Shen, Tong Hou, Yanglong |
| Affiliation | Peking Univ, Coll Engn, Dept Mat Sci & Engn, BIC ESAT,BKLMMD, Beijing 100871, Peoples R China |
| Keywords | LITHIUM-ION ELECTROCHEMICAL PERFORMANCE TIN OXIDE CAPACITY COMPOSITES ELECTRODE STORAGE NANOSHEETS FILMS |
| Issue Date | 1-Feb-2020 |
| Publisher | ENERGY & ENVIRONMENTAL SCIENCE |
| Abstract | Potassium-ion batteries (PIBs) are considered as potential replacements to lithium-ion batteries for large scale energy storage applications due to abundant potassium resources and low cost. However, it is a rough road to find suitable materials with high capacity and cycling stability due to the large K ion radius. In this study, a simple method, electrodeposition, is used to anchor SnO2 nanoparticles on three dimensional carbon foam (SnO2@CF) as a freestanding anode for PIBs. The prepared freestanding SnO2@CF electrode features a three dimensional (3D) conductive carbon frame and SnO2 nanoparticles, which can enhance electron transfer, prevent SnO2 from losing electrical contact after large volume changes and facilitate electrolyte infiltration and K ion transfer. As expected, SnO2@CF delivers a high K storage specific capacity, and outstanding cycling stability (231.7 mA h g(-1) after 400 cycles at 1 A g(-1)) and rate performance (371.4, 307.6, 247.3 and 143.5 mA h g(-1) at 0.5, 1, 2 and 5 A g(-1), respectively). Meanwhile, the phase transition of the SnO2@CF electrode is tracked during the charge and discharge processes in PIBs. This study provides a facile method to prepare freestanding electrode materials and a promising anode material for PIBs. |
| URI | http://hdl.handle.net/20.500.11897/586558 |
| ISSN | 1754-5692 |
| DOI | 10.1039/c9ee03682b |
| Indexed | SCI(E) Scopus EI |
| Appears in Collections: | 工学院 |
