Lithium ion transport in solid polymer electrolyte filled with alumina nanoparticles

Abstract

The solid polymer electrolyte (SPE) is a promising approach for improving lithium battery durability by suppressing the growth of lithium dendrites. However, its low conductivity at room temperature significantly limits...

Influence of Functional Groups on Li-Ion Transport in Dual-Ion vs Single-Ion Conducting Comb-Branched Polymer Electrolytes

“…Their values are similar to PEObased electrolytes. 49,50 The Li + dynamics is three times slower in EC at 450 K. The activation energies for all dual-ion systems are comparable, as indicated by the similar slope of the selfdiffusion temperature dependence. A similar trend is evident for D TFSI (Figure 4b).…”

Advances in Nanofibrous Materials for Stable Lithium-Metal Anodes

“…To further improve the comprehensive performance of SPEs, the researchers prepared composite polymer electrolytes (CPEs) by adding inorganic nanoparticle fillers into the polymer matrix. Inorganic fillers can be divided into two categories: One is inert fillers without lithium-conducting function, including Al 2 O 3 , SiO 2 , TiO 2 , BaTiO 3 , and so on; − and one is active fillers with lithium-conducting function, whose room temperature ionic conductivity is much higher than that of polymers, including LLTO, Li 7 La 3 Zr 2 O 12 (LLZO), LISICON, NASICON, and so on. − These fillers have effects on the Li + migration number, electrochemical stability window, and mechanical properties of CPEs. The current general view is that inorganic particle fillers can reduce the crystallinity of polymers and promote the dissociation of lithium salts, thereby increasing the ionic conductivity of polymers.…”

Can Silica Nanoparticles Improve Lithium Transport in Polymer Electrolytes?

“…Instead, they focused on studying the dynamics of both ions and polymers, as well as the local coordination features. , Despite the substantial literature on experimental research in this field, computational studies are scarce, probably due to the extremely complex nature of HSEs. Although some computational studies have reported an increase in the conductivity when adding nanoparticles, others have reported the opposite effect . This abundance of conflicting reports about HSEs shows that the literature on this topic is still unclear and inconsistent.…”

“…2 5 , 4 2 , 6 0 W e h a v e s e l e c t e d l i t h i u m b i s -(trifluoromethanesulfonyl)imide (LiTFSI) as the salt, because of its widespread use with PEO in SPEs, high chemical stability, and high dissociation in PEO. 61−66 Although prior computational studies have investigated HSEs, 51,52,67 to the best of our knowledge none has focused on the use of SiO 2 as a filler. Furthermore, previous works have mainly focused on the transport pathways of lithium, given its close interaction with PEO, whereas we provide a broader understanding of the system, studying the dynamical and structural properties for a wide range of ionic and ceramic concentrations and relating the individual conductivities and the transference number to the coordination number of the different moieties.…”