Composite Gel Electrolytes for Suppressing Lithium Dendrite Growth and Improving Cycling Performance of LiNi0.5Mn1.5O4 Electrodes

Core-shell structured SiO2 particles with a poly(lithium acrylate) shell were synthesized and used in preparing a composite gel electrolyte. The composite gel electrolyte exhibited high ionic conductivity and favorable interfacial characteristics at the lithium electrode. The use of a composite gel...

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Bibliographic Details
Published in:Journal of the Electrochemical Society 2015-01, Vol.162 (14), p.A2628-A2634
Main Authors: Shin, Won-Kyung, Park, Se-Mi, Lee, Yoon-Sung, Kim, Dong-Won
Format: Article
Language:English
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Summary:Core-shell structured SiO2 particles with a poly(lithium acrylate) shell were synthesized and used in preparing a composite gel electrolyte. The composite gel electrolyte exhibited high ionic conductivity and favorable interfacial characteristics at the lithium electrode. The use of a composite gel electrolyte containing SiO2(Li+) particles effectively suppressed both the dendrite growth of lithium and dissolution of transition metals from the active LiNi0.5Mn1.5O4 material. The lithium metal polymer cell composed of a lithium negative electrode and a LiNi0.5Mn1.5O4 positive electrode delivered a high discharge capacity of 136.6 mAh g−1 and exhibited good capacity retention.
ISSN:0013-4651
DOI:10.1149/2.0891512jes