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Journal of Materials Science
Erschienen in: Journal of Materials Science 13/2018

26.03.2018 | Energy materials

N-cyanoethyl polyethylenimine as a water-soluble binder for LiFePO4 cathode in lithium-ion batteries

verfasst von: Jinxin Huang, Jinglun Wang, Haoxiang Zhong, Lingzhi Zhang

Erschienen in: Journal of Materials Science | Ausgabe 13/2018

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Abstract

N-cyanoethyl polyethylenimine (CN-PEI) is synthesized by modifying polyethylenimine (PEI) with acrylonitrile through a Michael addition reaction. Depending on cyanoethylation level, CN-PEI can be obtained as a form of solution, micro-emulsion or emulsion in water. CN-PEI micro-emulsion is investigated as water-soluble binder for the application of lithium iron phosphate (LFP) cathode in lithium-ion batteries. CN-PEI binder not only maintains the outstanding dispersion capability of PEI but also exhibits an excellent adhesion strength and higher ionic conductivity because of the introduction of polar cyano groups. As a result, CN-PEI binder can effectively maintain the mechanical integrity and decrease the polarization of LFP electrode during the operation of the battery. LFP electrode with CN-PEI binder exhibits good cycle stability and enhanced rate performance delivering a capacity of 99.6% at a rate of 0.5 C after 100 cycles and a high discharge capacity of 102.4 mAh g−1 at 5 C.
Vorheriger Artikel Study of the alkali metal poisoning resistance of a Co-modified Mn/Ni foam catalyst in low-temperature flue gas SCR DeNO x
Nächster Artikel Organic vanadium oxy-acetylacetonate as electro-active anode material with high capacity and rate performance for lithium-ion batteries

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Metadaten
Titel
N-cyanoethyl polyethylenimine as a water-soluble binder for LiFePO4 cathode in lithium-ion batteries
verfasst von
Jinxin Huang
Jinglun Wang
Haoxiang Zhong
Lingzhi Zhang
Publikationsdatum
26.03.2018
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 13/2018
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-018-2247-y

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