期刊论文详细信息
Materials | |
Nitrogen-Doped Carbon for Red Phosphorous Based Anode Materials for Lithium Ion Batteries | |
Yumin Qian1  Xiangming He2  Li Wang3  Jiaoyang Li4  | |
[1]New Energy Technology, Tsinghua University, Beijing 100084, China | |
[2]Soft Materials, Soochow University, Suzhou 215123, China | |
[3] | |
[4]Institute of Functional Nano & | |
[5]Institute of Nuclear & | |
关键词: nitrogen-doped carbon; red phosphorous; anode materials; lithium ion batteries; | |
DOI : 10.3390/ma11010134 | |
来源: DOAJ |
【 摘 要 】
Serving as conductive matrix and stress buffer, the carbon matrix plays a pivotal role in enabling red phosphorus to be a promising anode material for high capacity lithium ion batteries and sodium ion batteries. In this paper, nitrogen-doping is proved to effective enhance the interface interaction between carbon and red phosphorus. In detail, the adsorption energy between phosphorus atoms and oxygen-containing functional groups on the carbon is significantly reduced by nitrogen doping, as verified by X-ray photoelectron spectroscopy. The adsorption mechanisms are further revealed on the basis of DFT (the first density functional theory) calculations. The RPNC (red phosphorus/nitrogen-doped carbon composite) material shows higher cycling stability and higher capacity than that of RPC (red phosphorus/carbon composite) anode. After 100 cycles, the RPNC still keeps discharge capacity of 1453 mAh g−1 at the current density of 300 mA g−1 (the discharge capacity of RPC after 100 cycles is 1348 mAh g−1). Even at 1200 mA g−1, the RPNC composite still delivers a capacity of 1178 mAh g−1. This work provides insight information about the interface interactions between composite materials, as well as new technology develops high performance phosphorus based anode materials.【 授权许可】
Unknown