Insight into the structure-capacity relationship in biomass derived carbon for high-performance sodium-ion batteries
| Autor: | Minhao Goh, Kaiyang Zeng, Yao Sun, Jianguo Sun, Qilin Gu, Li Lu, Jin An Sam Oh, Yuan Cheng, Weidong Zheng |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Heteroatom Intercalation (chemistry) Binding energy Doping Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences Anode Fuel Technology Adsorption chemistry Chemical engineering 0210 nano-technology Carbon Energy (miscellaneous) |
| Zdroj: | Journal of Energy Chemistry. 62:497-504 |
| ISSN: | 2095-4956 |
| Popis: | Carbonaceous materials are the most promising candidates as the anode for sodium-ion batteries (SIBs), however, they still suffer from low electric conductivity and sluggish sodium ion (Na+) reaction kinetics. Appropriate composition modulation using heteroatoms doping and structure optimization is highly desired. A basic empirical understanding of the structure-capacity relationship is also urgent in tackling the above problems. Herein, multi-functional nitrogen (N) doped carbon micro-rods with enlarged interlayer spacing are synthesized and investigated as the anode in SIBs, showing an ultra-stable capacity of 161.5 mAh g−1 at 2 A g−1 for over 5000 cycles. Experimental investigations and first-principle calculations indicate that the enlarged interlayer spacing can facilitate Na+ intercalation and N doping can guarantee the high electric conductivity and favorable electrochemical active sites. Additionally, pyridinic N is theoretically proved to be more effective to enhance Na+ adsorption than pyrrolic N due to the lower adsorption energy and stronger binding energy with Na+. Full SIBs show a high capacity and cyclability, making the biomass-derived carbon micro-rods to be a promising anode for practical SIBs applications. |
| Databáze: | OpenAIRE |
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