Journal
ELECTROCHIMICA ACTA
Volume 236, Issue -, Pages 221-227Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2017.03.168
Keywords
Lithium-ion battery; Interface; Conformal coating; Polymer electrolyte; High voltage cathode
Categories
Funding
- 135 Projects Fund of CAS-QIBEBT Director Innovation Foundation
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA09010105]
- Shandong Provincial Natural Science Foundation [BS2015CL006, ZR2015BM002]
- National Natural Science Foundation of China [51502319]
- Think-Tank Mutual Fund of Qingdao Energy Storage Industry Scientific Research
- Qingdao Key Lab of Solar Energy Utilization & Energy Storage Technology
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Undesired interfacial reaction between the high voltage spinel LiNi0.5Mn1.5O4 and commercial organic electrolyte is one of the most essential obstacles for the application of cathode material LiNi0.5Mn1.5O4 in lithium-ion batteries (LIBs). Here, to amend the high voltage cathode/electrolyte interface of LiNi0.5Mn1.5O4, we proposed a conformal nano-coating strategy by in-situ polymerization of poly(ethyl alpha-cyanoacrylate (PECA) on its surface. The electrochemical measurement results demonstrated that the conformal PECA nano-coating film, acting as high voltage polymer electrolyte, transition metallic ions blocking layer, and buffer layer against electrolyte erosion and particle cracks, can successfully decrease polarization and enhance capacity retention during cycling of LiNi0.5Mn1.5O4. This work will inspire extensive and intensive research on the interface modification of LIBs. (C) 2017 Elsevier Ltd. All rights reserved.
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