Journal
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
Volume 25, Issue 6, Pages 563-571Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.pnsc.2015.11.009
Keywords
Li ion battery; Solid electrolyte interphase; Surface modification; Polymer blend
Funding
- Ministry of Science and Technology (MOST), Taiwan [104-2221-E-002 -183 -MY3, 104-ET -E-002-001 -ET]
- Ministry of Economic Affairs [104-EC-17-A-08-S1-183]
- MOST post-doctoral fellowship [104-2811-E-002 -005]
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During the operation of Li-ion batteries (LIBs), solvent and electrolyte decomposition takes place at the electrode surface to form a so-called solid-electrode interphase (SEI) passivating-layer. The physical structure and chemical composition of the SEI exert profound effects on various aspects of the electrode performance of the batteries. A new concept of forming polymeric artificial SEIs (A-SEIs) based on rational design of multifunctional polymer-blend coating to achieve favorable electrode/A-SEI/electrolyte interfacial properties is described. Three examples using binary and ternary polymer blends to form mechanically robust and highly Li-ion permeable surface coatings with selected functionalities in the cases of graphite and silicon graphite composite electrodes have demonstrated greatly enhanced capacity, rate and cycle performance. Given the rich chemistry available from polymer blends, this surface preconditioning approach holds great promise for improving the performance of various negative electrodes to meet the requirements for advanced LIBs. (C) 2015 The Authors. Production and hosting by Elsevier B.V. on behalf of Chinese Materials Research Society.
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