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- Title
A Ternary Fe<sub>1−</sub><sub>x</sub>S@Porous Carbon Nanowires/Reduced Graphene Oxide Hybrid Film Electrode with Superior Volumetric and Gravimetric Capacities for Flexible Sodium Ion Batteries.
- Authors
Liu, Yang; Fang, Yongjin; Zhao, Zhiwei; Yuan, Changzhou; Lou, Xiong Wen (David)
- Abstract
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 Fe1−xS‐filled porous carbon nanowires/reduced graphene oxide (Fe1−xS@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 Fe1−xS nanoparticles, mitigating the dissolution of polysulfides, and enabling superior kinetics toward efficient sodium storage. When evaluated as a self‐supporting anode for SIBs, the Fe1−xS@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 Fe1−xS@PCNWs/rGO anode demonstrates outstanding electrochemical properties, thus highlighting its enormous potential in versatile flexible and wearable applications. A highly flexible Fe1−xS@PCNWs/rGO hybrid paper electrode with robust mechanical properties is successfully fabricated and shown to exhibit superior sodium storage properties with high volumetric and gravimetric capacities. Using this paper anode, a flexible sodium ion battery is also fabricated and shown to exhibit promising performance.
- Subjects
TERNARY alloys; IRON alloys; CARBON foams; NANOWIRES; GRAPHENE oxide; SODIUM ions
- Publication
Advanced Energy Materials, 2019, Vol 9, Issue 9, pN.PAG
- ISSN
1614-6832
- Publication type
Article
- DOI
10.1002/aenm.201970026