Unique core–shell structured SiO₂(Li⁺) nanoparticles for high-performance composite polymer electrolytes

Abstract

Core-shell structured SiO 2 nanoparticles with controlled morphology were synthesized and used as functional fillers in Li + -conducting composite polymer electrolytes for lithium-ion polymer batteries. The composite polymer electrolytes prepared with poly(vinylidene fluoride-co-hexafluoropropylene) and core-shell SiO 2 (Li + ) nanoparticles exhibited high ionic conductivity, good mechanical strength and favorable interfacial characteristics. Tests run on carbon/LiNi 1/3 Co 1/3 Mn 1/3 O 2 cells with composite polymer electrolyte containing optimized SiO 2 (Li + ) nanoparticles yielded excellent results in terms of capacity retention (95% after 100 cycles) and rate capability (167 mA h g À1 at 5 C rate).

Effect of polyacrylonitrile on triethylene glycol diacetate-2-propenoic acid butyl ester gel polymer electrolytes with interpenetrating crosslinked network for flexible lithium ion batteries

“…Compared to dried solid polymer electrolytes [6,7], gel polymer electrolytes (GPE) [8e10], formed by immersing large amount of liquid organic electrolytes into polymer frameworks, have received increasing attention in the flexible LIBs due to their high ionic conductivities on the order of 10 À3 S cm À1 at ambient temperature. Various polymer matrices, such as polyethylene oxide (PEO) [11,12], polyacrylonitrile (PAN) [13,14], polyvinylidene fluoride (PVDF) [15e17], poly(vinylidene fluoridehexafluoro propylene) (PVDF-HFP) [18,19], polymethylmethacrylate (PMMA) [20,21], polyimide (PI) [22,23], poly(urethane) (PU) [24,25] and etc., have been widely developed as candidate materials for the preparation of polymer electrolytes. Especially, PAN have been developed and attracted as the main component for applications not only in electric double layer capacitors [26,27], but also in LIBs [28,29].…”

Modified TiO2-SiO2 ceramic filler for a composite gel polymer electrolytes working with LiMn2O4

“…One of the most promising ways to obtain CPEs is the addition of nanosized or microsized ceramic fillers. The positive effect of various ceramic particles (SiO 2 [3,6], Al 2 O 3 [4] and TiO 2 [5,7,8]) on the conductivities of dry polymer electrolytes is also well documented in the literature.…”

“…Composite polymer electrolytes (CPEs) have received extensive attention in recent decades for their potential application in higher-energy-density and higher-power-density lithium batteries, owing to their lack of leakage, high flexibility within the cell geometry, high physical and chemical stability and good interfacial compatibility with electrodes [1][2][3][4][5]. One of the most promising ways to obtain CPEs is the addition of nanosized or microsized ceramic fillers.…”

Flexible, high-voltage and free-standing composite polymer electrolyte membrane based on triethylene glycol diacetate-2-propenoic acid butyl ester copolymer for lithium-ion batteries

“…However, their poor mechanical properties still limit their applications [8][9][10][11]. To address the problems, ceramic fillers such as SiO 2 [12][13][14], Al 2 O 3 [15,16], TiO 2 [17,18] have been incorporated into polymer matrices to develop a new family of composite polymer electrolytes (CPE). It has been noticeable that the addition of ceramic fillers can offer improved ionic conductivity, safety, and in particular, electrolyte/ electrode compatibility [19][20][21].…”