Poly (ethylene oxide) based solid polymer electrolyte improved by multifunctional additives of poly (acrylamide) and LiI

Huang

ACS Appl. Energy Mater.

et al. 2023

The poor interfacial contact between solid-state electrolytes (SSEs) and electrodes, which hinders the applications of solid-state batteries (SSBs), could be improved by in situ polymerization. However, the limited electrochemical window and insufficient mechanical strength of in situ-polymerized electrolytes make them unable to match high-voltage cathodes and inhibit lithium dendrites. Here, a layered organic–inorganic composite solid-state electrolyte structure is designed by introducing a Li1.3Al0.3Ti1.7(PO4)3 (LATP)-coated polyethylene separator and fluoroethylene carbonate (FEC) into in situ-polymerized 1,3-dioxolane (DOL). The high-voltage stable fluoride-rich cathode–electrolyte interface formed in situ by FEC widens the electrochemical window of the composite solid-state electrolyte. In addition, the LATP coating layer inhibits the growth of lithium dendrites and increases the Li-ion conductivity by reacting with FEC to generate FEC derivatives. The Li/LiCoO2 battery exhibits good cycling and rate performance with a cutoff voltage of 4.3 V at room temperature. It provides a simple and practical solution to improve the performance of high-voltage lithium metal batteries based on in situ polymerization.

Section: Results and Discussionmentioning

confidence: 99%

Layer-Structured Composite Solid-State Electrolyte with a Li_1.3Al_0.3Ti_1.7(PO₄)₃-Coated Separator for High-Voltage Lithium Metal Batteries by In Situ Polymerization

Huang

ACS Appl. Energy Mater.

et al. 2023

“…2f and Fig. S8†) exhibits the characteristic diffraction peaks of both PEO (PDF#49-2201) 24 and boehmite, reflecting the successful mixing of boehmite with the PEO matrix. The diffraction peaks at 2 θ = 18.6° significantly decreased with the introduction of boehmite, indicating the decrease in solid-state electrolyte crystallinity.…”

Section: Resultsmentioning

confidence: 98%

“…Additionally, the weak mechanical strength and low oxidation resistance (<4.0 V) of PEO limit its application in high-voltage solid-state batteries. [24][25][26][27] The addition of inorganic ceramic particles can enhance these properties. While inorganic nanoparticles such as Al 2 O 3 , SiO 2 , and TiO 2 do not directly increase the conductivity of polymer electrolytes, they can control crystallization by hybridizing with the polymer, weaken the interaction between polymer-ions and lithium salt-anions, promote the dissociation of lithium salts, and release free lithium ions to increase the number of migrating Li + .…”

Section: Introductionmentioning

confidence: 99%

Different-grain-sized boehmite nanoparticles for stable all-solid-state lithium metal batteries

Zhao,

Tian,

Gao

et al. 2024

Nanoscale

“…The preparation process for the membrane is displayed in Fig. 1 , which explains the ion transport within the polymer structure through O in urethane (-COONH-) and N in the acrylonitrile (-CN) group 34 , 45 .…”

Section: Resultsmentioning

confidence: 99%

Zn salts incorporated polyurethane/polyacrylonitrile electrospinning fiber membrane for high porosity polymer electrolyte in Zn ion battery

Likitaporn,

Okhawilai,

Senthilkumar

et al. 2023

Sci Rep

So far, a large variety of polymer molecule architectures have been explored in the electrolyte field. Polymer electrolytes have gathered research efforts as an interesting alternative to conventional liquid electrolytes due to their advantages of low probability of leakage and low volatility of liquid solvent, lightweight, flexibility, inertness, high durability, and thermal stability. In this work, a polymer electrolyte developed from a polyurethane/polyacrylonitrile (PU/PAN) electrospinning fiber membrane was added with different zinc (Zn) salts, namely, Zn(CH3CO2)2, ZnSO4, and Zn(OTf)2. The samples with the Zn salt presented many different properties; especially, the high Zn(OTf)2 sample showed gradually bundle morphology in its structure. Characterization revealed improved properties in contact angle, water uptake, and thermal resistance. Namely, the 15 wt% Zn(OTf)2) sample exhibited an outstandingly high ionic conductivity of 3.671 mS cm−1, which is 10 times higher than that of the neat PU/PAN membrane.