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Red Phosphorus/Onion‐like Mesoporous Carbon Composite as High‐Performance Anode for Sodium‐Ion Battery
Author(s) -
Liang Xiaoqiang,
Chang Caiyun,
Guo Wenbin,
Jiang Xingmao,
Xiong Chunyan,
Pu Xiong
Publication year - 2019
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201901696
Subject(s) - anode , composite number , materials science , sodium ion battery , mesoporous material , electrochemistry , electrode , chemical engineering , battery (electricity) , swelling , carbon fibers , phosphorus , sodium , nanotechnology , chemistry , composite material , catalysis , metallurgy , organic chemistry , power (physics) , physics , faraday efficiency , quantum mechanics , engineering
Red phosphorus has been regarded as an attractive candidate for the anode of sodium‐ion batteries (NIBs) because it delivers a high theoretical capacity (2596 mAh g −1 ) at low potentials. However, the electrochemical performances of red P are still not satisfactory for viable applications mainly due to its intrinsic low conductivity and large volume swelling associated with sodiation reactions. Here, we develop onion‐like mesoporous carbon nanoparticles (OCNPs) to serve as conductive host for red P. The OCNPs can alleviate the large volume swelling of red P, and allow the fast electron and Na + transport. The resulting P/OCNPs composite electrode achieves excellent rate performance of 1286.7 mAh g −1 at 2 C, and retained discharge capacity of 1057.5 mAh g −1 after 150 cycles at 0.5 C. The improved stability of the composite electrode is also confirmed by the structure integrity after the cycling test. Our work presents a feasible approach to address the challenges of red P for high‐capacity anode of NIBs.