C–S@PANI composite with a polymer spherical network structure for high performance lithium–sulfur batteries
Literature Information
Publication Date
2015-11-05
DOI
10.1039/C5CP05447H
Impact Factor
3.676
Authors
Junkai Wang, Kaiqiang Yue, Xiaodan Zhu, Kang L. Wang
View Original
Abstract
A unique C–S@PANI composite with a conductive polymer spherical network (PSN) has been successfully designed and synthesized by a simple processing approach. The PSN framework is formed at the surface of the oxidized carbon black by conductive polymer self-assembly and grafting, followed by pouring elemental sulfur into the pores of the polymer matrix. As the cathode material for lithium–sulfur batteries, the C–S@PANI composite delivered a high specific capacity of 1453 mA h g−1 at a 0.1 C current rate and a stable cycling performance of 948 mA h g−1 after 200 cycles. The composite also demonstrated high capacities of 922 and 581 mA h g−1 at 50 °C and 0 °C, respectively, after 200 cycles. The conductive PANI coatings were connected with the C–S core–shell composites to form a three-dimensional conducting network, which improves the utilization of the active mass and dual conduction of Li+ and electrons, while at the same time encapsulating sulfur into the PANI hollow spherical network. The structure effectively inhibits the dissolution and migration of polysulfides into the electrolyte, while improving the cycling stability and the coulombic efficiency of the electrode at high current rates, especially the low temperature electrochemical properties of Li–S batteries.
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Source Journal
Physical Chemistry Chemical Physics
CiteScore:
5.5
Self-citation Rate:
10.3%
Articles per Year:
3036
Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.
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1-(2-Chlorophenyl)-6-[(2S)-3,3,3-trifluoro-2-methylpropyl]-1,7-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one
CAS Number:
794568-91-5
Molecular Formula:
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CAS Number:
1027616-32-5
Molecular Formula:
C13H19IN4O2
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