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A Cellulose-Derived Nanofibrous $MnO_{2}-TiO_{2}$-Carbon Composite as Anodic Material for Lithium-Ion Batteries
| Content Provider | MDPI |
|---|---|
| Author | Li, Shun Yang, Ming He, Guijin Qi, Dongmei Huang, Jianguo |
| Copyright Year | 2021 |
| Description | A bio-inspired nanofibrous $MnO_{2}-TiO_{2}$-carbon composite was prepared by utilizing natural cellulosic substances (e.g., ordinary quantitative ashless filter paper) as both the carbon source and structural matrix. Mesoporous $MnO_{2}$ nanosheets were densely immobilized on an ultrathin titania film precoated with cellulose-derived carbon nanofibers, which gave a hierarchical $MnO_{2}-TiO_{2}$-carbon nanoarchitecture and exhibited excellent electrochemical performances when used as an anodic material for lithium-ion batteries. The $MnO_{2}-TiO_{2}$-carbon composite with a $MnO_{2}$ content of 47.28 wt % exhibited a specific discharge capacity of 677 mAh $g^{−1}$ after 130 repeated charge/discharge cycles at a current rate of 100 mA $g^{−1}$. The contribution percentage of $MnO_{2}$ in the composite material is equivalent to 95.1% of the theoretical capacity of $MnO_{2}$ (1230 mAh $g^{−1}$). The ultrathin $TiO_{2}$ precoating layer with a thickness ca. 2 nm acts as a crucial interlayer that facilitates the growth of well-organized $MnO_{2}$ nanosheets onto the surface of the titania-carbon nanofibers. Due to the interweaved network structures of the carbon nanofibers and the increased content of the immobilized $MnO_{2}$, the exfoliation and aggregation, as well as the large volume change of the $MnO_{2}$ nanosheets, are significantly inhibited; thus, the $MnO_{2}-TiO_{2}$-carbon electrodes displayed outstanding cycling performance and a reversible rate capability during the $Li^{+}$ insertion/extraction processes. |
| Starting Page | 3411 |
| e-ISSN | 19961944 |
| DOI | 10.3390/ma14123411 |
| Journal | Materials |
| Issue Number | 12 |
| Volume Number | 14 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-06-20 |
| Access Restriction | Open |
| Subject Keyword | Materials Electrochemistry Bio-inspired Materials Cellulosic Substances Titania Film Mno2 Nanosheets Lithium-ion Batteries |
| Content Type | Text |
| Resource Type | Article |
