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Title: Stable Low-Current Electrodeposition of α-MnO 2 on Superaligned Electrospun Carbon Nanofibers for High-Performance Energy Storage

Authors:
 [1];  [1];  [2];  [2]; ORCiD logo [1]
  1. Department of Nanoscience, Joint School of Nanoscience and Nanoengineering, University of North Carolina at Greensboro, Greensboro NC 27401 USA
  2. Department of Chemistry, University of Pittsburgh, Pittsburgh PA 15260 USA
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1410597
Grant/Contract Number:
ER46430
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Small
Additional Journal Information:
Journal Volume: 14; Journal Issue: 3; Related Information: CHORUS Timestamp: 2018-01-18 09:27:03; Journal ID: ISSN 1613-6810
Publisher:
Wiley Blackwell (John Wiley & Sons)
Country of Publication:
Germany
Language:
English

Citation Formats

Liu, Yiyang, Zeng, Zheng, Bloom, Brian, Waldeck, David H., and Wei, Jianjun. Stable Low-Current Electrodeposition of α-MnO 2 on Superaligned Electrospun Carbon Nanofibers for High-Performance Energy Storage. Germany: N. p., 2017. Web. doi:10.1002/smll.201703237.
Liu, Yiyang, Zeng, Zheng, Bloom, Brian, Waldeck, David H., & Wei, Jianjun. Stable Low-Current Electrodeposition of α-MnO 2 on Superaligned Electrospun Carbon Nanofibers for High-Performance Energy Storage. Germany. doi:10.1002/smll.201703237.
Liu, Yiyang, Zeng, Zheng, Bloom, Brian, Waldeck, David H., and Wei, Jianjun. 2017. "Stable Low-Current Electrodeposition of α-MnO 2 on Superaligned Electrospun Carbon Nanofibers for High-Performance Energy Storage". Germany. doi:10.1002/smll.201703237.
@article{osti_1410597,
title = {Stable Low-Current Electrodeposition of α-MnO 2 on Superaligned Electrospun Carbon Nanofibers for High-Performance Energy Storage},
author = {Liu, Yiyang and Zeng, Zheng and Bloom, Brian and Waldeck, David H. and Wei, Jianjun},
abstractNote = {},
doi = {10.1002/smll.201703237},
journal = {Small},
number = 3,
volume = 14,
place = {Germany},
year = 2017,
month =
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on November 29, 2018
Publisher's Accepted Manuscript

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  • Here, nitrogen-doped carbon nanofiber (NDCN) was synthesized via carbonization of polypyrrole (PPy) coated bacterial cellulose (BC) composites, where BC serves as templates as well as precursor, and PPy serves as the nitrogen source. The synthesized NDCN was employed as electrode for both supercapacitors and Li-ion batteries. The large surface area exposed to electrolyte resulting from the 3D carbon networks leads to sufficient electrode/electrolyte interface and creates shorter transport paths of electrolyte ions and Li + ion. Besides, the three types of N dopants in NDCN improve the electronic conductivity, as well as superior electrochemical performance.
  • Ultrafine manganese oxide-decorated carbon nanofibers (MnOn-CNF) as a new type of electrode materials are facilely fabricated by direct conversion of Mn, Zn-trimesic acid (H3BTC) metal organic framework fibers (Mn-ZnBTC). The construction and evolution of Mn-ZnBTC precursors are investigated by SEM and in situ high-energy XRD. The manganese oxides are highly dispersed onto the porous carbon nanofibers formed simultaneously, verified by TEM, X-ray absorption fine structure (XAFS), Raman, ICP-AES and N2 adsorption techniques. As expected, the resulting MnOn-CNF composites are highly stable, and can be cycled up to 5000 times with a high capacitance retention ratio of 98% in electrochemical capacitormore » measurements. They show a high capacitance of up to 179 F g–1 per mass of the composite electrode, and a remarkable capacitance of up to 18290 F g–1 per active mass of the manganese(IV) oxide, significantly exceeding the theoretical specific capacitance of manganese(IV) oxide (1370 F g–1). The maximum energy density is up to 19.7 Wh kg–1 at the current density of 0.25 A g–1, even orders higher than those of reported electric double-layer capacitors and pseudocapacitors. The excellent capacitive performance can be ascribed to the joint effect of easy accessibility, high porosity, tight contact and superior conductivity integrated in final MnOn-CNF composites.« less
  • Two types of hard carbon materials were synthesized through direct pyrolysis of commercial polyvinyl chloride (PVC) particles and pyrolysis of PVC nanofibers at 600-800 degrees C, respectively, where the nanofibers were prepared by an electrospinning PVC precursors method. These as-prepared hard carbon samples were used as anode materials for Na-ion batteries. The hard carbon obtained from PVC nanofibers achieved a high reversible capacity of 271 mAh/g and an initial Coulombic efficiency of 69.9%, which were much superior to the one from commercial PVC, namely, a reversible capacity of 206 mAh/g and an initial Coulombic efficiency of 60.9%. In addition, themore » hard carbon originated from the PVC nanofibers exhibited good cycling stability and rate performance: the initial discharge capacities were 389, 228, 194, 178, 147 mAh/g at the current density of 12, 24, 60, 120, and 240 mA/g, respectively, retaining 211 mAh/g after 150 cycles. Such excellent cycle performance, high reversible capacity, and good rate capability enabled this hard carbon to be a promising candidate as anode material for Na-ion battery application.« less