N/O Dual‐Doped Environment‐Friendly Hard Carbon as Advanced Anode for Potassium‐Ion Batteries
| Autor: | Qing Jiang, Bo Xu, Rong Chao Cui, Hou Ji Dong, Chun Cheng Yang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
General Chemical Engineering Intercalation (chemistry) General Physics and Astronomy Medicine (miscellaneous) chemistry.chemical_element 02 engineering and technology 010402 general chemistry Electrochemistry 01 natural sciences Biochemistry Genetics and Molecular Biology (miscellaneous) Energy storage N/O dual doping General Materials Science sorghum stalks lcsh:Science Full Paper low cost Carbonization Doping General Engineering Full Papers 021001 nanoscience & nanotechnology potassium‐ion batteries 0104 chemical sciences Anode Chemical engineering chemistry Electrode lcsh:Q hard carbon 0210 nano-technology Carbon |
| Zdroj: | Advanced Science, Vol 7, Iss 5, Pp n/a-n/a (2020) Advanced Science |
| ISSN: | 2198-3844 |
| DOI: | 10.1002/advs.201902547 |
| Popis: | Potassium‐ion batteries (PIBs) are considered as promising candidates for lithium‐ion batteries due to the abundant reserve and lower cost of K resources. However, K+ exhibits a larger radius than that of Li+, which may impede the intercalation of K+ into the electrode, thus resulting in poor cycling stability of PIBs. Here, an N/O dual‐doped hard carbon (NOHC) is constructed by carbonizing the renewable piths of sorghum stalks. As a PIB anode, NOHC presents a high reversible capacity (304.6 mAh g−1 at 0.1 A g−1 after 100 cycles) and superior cycling stability (189.5 mAh g−1 at 1 A g−1 after 5000 cycles). The impressive electrochemical performances can be ascribed to the super‐stable porous structure, expanded interlayer space, and N/O dual‐doping. More importantly, the NOHC can be prepared in large scale in a concise way, showing great potential for commercialization applications. This work may impel the development of low‐cost and sustainable carbon‐based materials for PIBs and other advanced energy storage devices. A low‐cost and sustainable N/O dual‐doped hard carbon (NOHC) is constructed by carbonizing the renewable piths of sorghum stalks. As an anode material in potassium‐ion batteries, the NOHC exhibits a high reversible capacity and superior cycling stability, outperforming most carbonaceous materials. |
| Databáze: | OpenAIRE |
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