TY - JOUR
T1 - Metastable trigonal SnP
T2 - A promising anode material for potassium-ion battery
AU - Li, Bing
AU - Shang, Shunli
AU - Zhao, Jiawei
AU - Itkis, Daniil M.
AU - Jiao, Xingxing
AU - Zhang, Chaofan
AU - Liu, Zi Kui
AU - Song, Jiangxuan
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (Grant No.51602250 and 21875181). The authors also would like to thank Mr. Ren and Ms. Liu at Instrument Analysis Center of Xi'an Jiaotong University for their assistance with SEM and XPS analysis.
Funding Information:
This work was supported by the National Natural Science Foundation of China (Grant No. 51602250 and 21875181 ). The authors also would like to thank Mr. Ren and Ms. Liu at Instrument Analysis Center of Xi’an Jiaotong University for their assistance with SEM and XPS analysis.
Publisher Copyright:
© 2020
PY - 2020/10/30
Y1 - 2020/10/30
N2 - Potassium-ion batteries (PIBs) have attracted great interest due to their high-energy-density and low-cost. The lack of stable anode material greatly limits the quick development of PIBs. Phosphorus-metal compounds are regarded as a class of materials with promising prospects as anode material for PIBs with a low operating voltage and high conductivity. Among them, due to the challenging synthesis method, the application of SnP is limited. Herein, a facile approach to synthesize trigonal SnP@C through alloying red phosphorus with tin on carbon material is reported. It is found that carbon substrate can largely reduce vibrational and configurational entropies, playing a critical role on the formation of metastable SnP. When applied as anode in PIBs, the SnP@C composite delivers a high reversible capacity of 478.1 mAh·g−1 at 50 mA g−1 and a stable cycling performance at 1000 mA g−1. The good electrochemical performance is associated with the SnP@C as well as the carbon, which could suppress the phase separation during charge/discharge process to maintain structural stability. This work may open a new avenue for low-cost synthesis of metastable phases for advanced energy storage systems.
AB - Potassium-ion batteries (PIBs) have attracted great interest due to their high-energy-density and low-cost. The lack of stable anode material greatly limits the quick development of PIBs. Phosphorus-metal compounds are regarded as a class of materials with promising prospects as anode material for PIBs with a low operating voltage and high conductivity. Among them, due to the challenging synthesis method, the application of SnP is limited. Herein, a facile approach to synthesize trigonal SnP@C through alloying red phosphorus with tin on carbon material is reported. It is found that carbon substrate can largely reduce vibrational and configurational entropies, playing a critical role on the formation of metastable SnP. When applied as anode in PIBs, the SnP@C composite delivers a high reversible capacity of 478.1 mAh·g−1 at 50 mA g−1 and a stable cycling performance at 1000 mA g−1. The good electrochemical performance is associated with the SnP@C as well as the carbon, which could suppress the phase separation during charge/discharge process to maintain structural stability. This work may open a new avenue for low-cost synthesis of metastable phases for advanced energy storage systems.
UR - https://www.scopus.com/pages/publications/85088891029
UR - https://www.scopus.com/pages/publications/85088891029#tab=citedBy
U2 - 10.1016/j.carbon.2020.03.048
DO - 10.1016/j.carbon.2020.03.048
M3 - Article
AN - SCOPUS:85088891029
SN - 0008-6223
VL - 168
SP - 468
EP - 474
JO - Carbon
JF - Carbon
ER -