Premium
Red Phosphorus Nanoparticle@3D Interconnected Carbon Nanosheet Framework Composite for Potassium‐Ion Battery Anodes
Author(s) -
Xiong Peixun,
Bai Panxing,
Tu Shuibin,
Cheng Mingren,
Zhang Jinfeng,
Sun Jie,
Xu Yunhua
Publication year - 2018
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201802140
Subject(s) - nanosheet , anode , materials science , nanocomposite , electrochemistry , phosphorus , battery (electricity) , composite number , nanoparticle , chemical engineering , potassium ion battery , carbon fibers , transmission electron microscopy , potassium , nanotechnology , ion , electrode , composite material , chemistry , metallurgy , lithium vanadium phosphate battery , organic chemistry , power (physics) , physics , quantum mechanics , engineering
Red phosphorus (P) has been recognized as a promising storage material for Li and Na. However, it has not been reported for K storage and the reaction mechanism remains unknown. Herein, a novel nanocomposite anode material is designed and synthesized by anchoring red P nanoparticles on a 3D carbon nanosheet framework for K‐ion batteries (KIBs). The red P@CN composite demonstrates a superior electrochemical performance with a high reversible capacity of 655 mA h g −1 at 100 mA g −1 and a good rate capability remaining 323.7 mA h g −1 at 2000 mA g −1 , which outperform reported anode materials for KIBs. The transmission electron microscopy and theoretical calculation results suggest a one‐electron reaction mechanism ofP + K + + e − → KP, corresponding to a theoretical capacity of 843 mA h g −1 ,which is the highest value for anode materials investigated for KIBs. The study not only sheds light on the rational design of high performance red P anodes for KIBs but also offers a fundamental understanding of the potassium storage mechanism of red P.