Nitrogen and phosphorus dual-doped porous carbons for high-rate potassium ion batteries
| Autor: | Yiping Zhong, Jieshan Qiu, Jian Xiao, Xuedan Song, Shijia Zhao, Hongda Guo, Xiaoqing Ma, Wang Yongtao, Nan Xiao |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Battery (electricity)
Materials science Carbonization Potassium Heteroatom chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Nitrogen 0104 chemical sciences chemistry.chemical_compound chemistry Chemical engineering medicine General Materials Science Coal tar 0210 nano-technology Thermal analysis Ammonium polyphosphate medicine.drug |
| Zdroj: | Carbon. 179:33-41 |
| ISSN: | 0008-6223 |
| DOI: | 10.1016/j.carbon.2021.03.067 |
| Popis: | Pitch-based porous carbons with the abundant resources and high conductivity have potential advantages as potassium-ion battery anode materials. However, they suffer from small interlayer distance and rare potassium storage sites. Herein, nitrogen and phosphorus dual-doped coal tar pitch-based porous carbons (NPPC) was prepared in one-step carbonization using ammonium polyphosphate as N and P source and studied as the anodes for the potassium ion batteries. NPPC delivers a high capacity retention of 81.8% over 400 cycles at 1.0 A g−1. When the current density is raised to 10 A g−1, it can still retain a reversible capacity of 126 mAh g−1. The effects of carbonation temperature and ratio of ammonium polyphosphate to coal tar pitch on nitrogen and phosphorus doping contents were investigated by in situ Fourier transform infrared and synchronous thermal analysis. This work may shed light on the design of advanced potassium-ion battery by employing heteroatom doped functionalized soft carbons. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect