A non-Newtonian fluid quasi-solid electrolyte designed for long life and high safety Li-O2 batteries

Abstract

The Li dendrite growth and the liquid electrolyte volatilization under semi-open architecture are intrinsic issues for Li-O2 battery. In this work, we propose a non-Newtonian fluid quasi-solid electrolyte (NNFQSE) SiO2-SO3Li/PVDF-HFP, which has both shear-thinning and shear-thickening properties. The component interactions among the sulfonated silica nanoparticles, liquid electrolyte, and polymer network are beneficial for decent Li+ conductivity and high liquid electrolyte retention without volatilization. Furthermore, NNFQSE exhibits shear-thinning property to eliminate the stress of dendrite growth during repeated cycling. Meanwhile, when the force suddenly increases, such as a high current rate, the NNFQSE may dynamically turn shear-thickening to respond and mechanically stiffen to inhibit the lithium dendrite penetration. By coupling with the NNFQSE, the lithium symmetrical battery can run over 2000 h under 1 mA cm−2 at room temperature, and the quasi-solid Li-O2 battery actualizes long life above 5000 h at 100 mA g−1.

Tailoring composite gel polymer electrolytes with regularly arranged pores and silica particles for sodium metal batteries via breath-figure self-assembly

“…This is attributable to the electrolyte retention ability of the P-P3S7 at high temperatures as well as the suppressed Na dendrite growth and unstable SEI. 46 It was further found out that the changes in resistance values before and after cycling at 60 °C followed a similar tendency as observed from the long-term cycling results at 30 °C (Fig. S16†).…”

“…The regularly dispersed silica particles in the P-P3S7 with low roughness effectively enhance the overall mechanical strength of the membrane, acting as a mechanical barrier against dendrite growth. 46 As revealed by universal tensile machine (UTM) analysis (Fig. S13†), the P-P3S7 was found to be tougher and less rigid compared to the N-P3S7, presumably because the relatively irregular distribution of silica particles in the N-P3S7 causes phase separation between the hard silica-rich phases and soft PVH domains.…”

Research Progress of Shear Thickening Electrolyte Based on Liquid–Solid Conversion Mechanism

“…The involvement of oxygen will accelerate the deterioration of the battery performance [64]. Zheng et al [65] developed NNFQSE, an electrolyte with a shear thickening effect that maintains the ultra-long life of lithium-oxygen batteries. As shown in Figure 7j-l, the ionic dipole interaction between the polar-CFx group of PVDF-HFP and the sulfate group of SiO 2 gives NNFQSE a honeycomb morphology and surface channels with a depth of up to 60.7 nm, which allows faster movement of Li + and accommodates more liquid electrolyte, which can be confirmed by Figure 7o.…”

Modulation Strategies and Activity Descriptors of Spinel Electrocatalysts for Lithium−Oxygen Batteries

“…LithiumÀ oxygen batteries (LOBs) are widely regarded as a promising energy storage device due to their high theoretical energy density (3500 Wh kg À 1 ). [1][2][3][4] With respect to the electrolytes used, rechargeable LOBs can be classified into four types, [5][6][7] namely (1) aprotic, (2) aqueous, (3) hybrid aqueous/ aprotic, and (4) all-solid-state. It is worth noting that the chemistry of the cathodes of the above systems varies with the electrolyte surrounding the cathode.…”