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A Ternary Fe 1− x S@Porous Carbon Nanowires/Reduced Graphene Oxide Hybrid Film Electrode with Superior Volumetric and Gravimetric Capacities for Flexible Sodium Ion Batteries
Author(s) -
Liu Yang,
Fang Yongjin,
Zhao Zhiwei,
Yuan Changzhou,
Lou Xiong Wen David
Publication year - 2019
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201803052
Subject(s) - materials science , gravimetric analysis , graphene , anode , electrode , oxide , electrochemistry , ternary operation , chemical engineering , nanotechnology , porosity , composite material , computer science , chemistry , organic chemistry , engineering , metallurgy , programming language
Smart construction of ultraflexible electrodes with superior gravimetric and volumetric capacities is still challenging yet significant for sodium ion batteries (SIBs) toward wearable electronic devices. Herein, a hybrid film made of hierarchical Fe 1− x S‐filled porous carbon nanowires/reduced graphene oxide (Fe 1− x S@PCNWs/rGO) is synthesized through a facile assembly and sulfuration strategy. The resultant hybrid paper exhibits high flexibility and structural stability. The multidimensional paper architecture possesses several advantages, including rendering an efficient electron/ion transport network, buffering the volume expansion of Fe 1− x S nanoparticles, mitigating the dissolution of polysulfides, and enabling superior kinetics toward efficient sodium storage. When evaluated as a self‐supporting anode for SIBs, the Fe 1− x S@PCNWs/rGO paper electrode exhibits remarkable reversible capacities of 573–89 mAh g −1 over 100 consecutive cycles at 0.1 A g −1 with areal mass loadings of 0.9–11.2 mg cm −2 and high volumetric capacities of 424–180 mAh cm −3 in the current density range of 0.2–5 A g −1 . More competitively, a SIB based on this flexible Fe 1− x S@PCNWs/rGO anode demonstrates outstanding electrochemical properties, thus highlighting its enormous potential in versatile flexible and wearable applications.