NDLI: A supramolecular self-assembly hydrogel binder enables enhanced cycling of SnO$_{2}$-based anode for high-performance lithium-ion batteries

Content Provider	Springer Nature Link
Author	Shi, Yunhui Ma, Daqian Wang, Wenjing Zhang, Lifang Xu, Xinhua
Copyright Year	2016
Abstract	Here, a supramolecular self-assembly hydrogel was designed for SnO$_{2}$-based anode through electrostatic interaction and ionic bonding between poly(allylamine hydrochloride) (PAH) chain and gelator phytic acid. Microrheology measurement was employed to investigate the self-sorting mechanism of the hierarchical nanostructured PAH. Results confirmed that ionically cross-link PAH improves the structural integrity of SnO$_{2}$ nanospheres due to the reversible ionic bonding and thus increases the lifetime of the electrodes obviously. Besides, multi-walled carbon nanotubes (MWCNTs) were applied to improve the electrochemical performance of hollow SnO$_{2}$ nanospheres due to their high conductivity. Results confirmed that the conductive network constructed by MWCNTs reduces the polarization of the composites while increases the specific capacity of the electrodes. Attributed to the synergistic effect of PAH-60 and MWCNTs, the composite electrodes show excellent electrochemical performance with a reversible capacity of 574 mAh g$^{−1}$ after 100 cycles at 100 mA g$^{−1}$, a discharge capacity of 321 mAh g$^{−1}$ at 2000 mA g$^{−1}$ and a spring-back capacity of 506 mAh g$^{−1}$ at 200 mA g$^{−1}$. Additionally, the prepared composite electrodes were observed to have a complete network structure after rate capability test, demonstrating a superior structural stability.
Starting Page	3545
Ending Page	3555
Page Count	11
File Format	PDF
ISSN	00222461
Journal	Journal of Materials Science
Volume Number	52
Issue Number	7
e-ISSN	15734803
Language	English
Publisher	Springer US
Publisher Date	2016-11-28
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Materials Science Characterization and Evaluation of Materials Polymer Sciences Continuum Mechanics and Mechanics of Materials Crystallography and Scattering Methods Classical Mechanics
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Mechanics of Materials Mechanical Engineering Polymers and Plastics

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