Polyaniline/Polyoxometalate Hybrid Nanofibers as Cathode for Lithium Ion Batteries with Improved Lithium Storage Capacity

Title
Polyaniline/Polyoxometalate Hybrid Nanofibers as Cathode for Lithium Ion Batteries with Improved Lithium Storage Capacity
Author(s)
송태섭Hongxun Yang[Hongxun Yang]Li Liu[Li Liu]Anitha Devadoss[Anitha Devadoss]Fan Xia[Fan Xia]Hyungkyu Han[Hyungkyu Han]Hyunjung Park[Hyunjung Park]Wolfgang Sigmund[Wolfgang Sigmund]Kyungjung Kwon[Kyungjung Kwon]Ungyu Paik[Ungyu Paik]
Keywords
ACID-DOPED POLYANILINE; NANOSTRUCTURED MATERIALS; SECONDARY BATTERIES; ACTIVE MATERIAL; ELECTRODES; PHOSPHOMOLYBDATE; INTERCALATION; CONDUCTIVITY; POLYPYRROLE; POLYMERS
Issue Date
201308
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF PHYSICAL CHEMISTRY C, v.117, no.34, pp.17376 - 17381
Abstract
Hybrid nanofibers of polyaniline/polyoxometalate are synthesized via a facile interfacial polymerization method for the first time, and evaluated as a cathode material for lithium ion batteries. The hybrid nanofibers with 100 nm diameter consisted of phosphomolybdic acid polyanion, [PMo12O40](3-), and polyaniline matrix. Their ID geometry improves the utilization of electrode materials and accommodates the volume change during cycling, which enables the significant improvement in lithium storage capacity and capacity retentions. The phosphomolybdic acid polyanions not only exhibit a large theoretical capacity of about 270 mAh g(-1), but also reduce the charge transfer resistance of electrode leading to the enhanced reversible capacity and rate capability. The polyaniline/polyoxometalate nanofibers delivered a remarkably improved electrochemical performance in terms of lithium storage capacity (183.4 mAh g(-1) at 0.1C rate), cycling stability (80.7% capacity retention after SO cycles), and rate capability (94.2 mAh g(-1) at 2C rate) compared to polyaniline nanofibers and bulk polyaniline/polyoxometalate hybrid.
URI
http://hdl.handle.net/YU.REPOSITORY/29203http://dx.doi.org/10.1021/jp401989j
ISSN
1932-7447
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공과대학 > 신소재공학부 > Articles
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