Surface confinement induced amorphization of polyethylene oxide in high-performance porous polyethylene films

Room-temperature all-solid-state lithium metal batteries based on ultrathin polymeric electrolytes

“…The preparation protocol is briey as follows: rst, the pristine amphiphilic PE membrane at thicknesses about 4-5 mm (Fig. S4 †) was fabricated following the method developed in our laboratory; [24][25][26] second, the ionic conductor containing the lowly viscous electrolyte, SPE, which comprises a mole ratio of ether oxygen (EO + PO) to Li + of 12 : 1, was impregnated inside the PE membrane aided by solvent acetonitrile, the process was repeated a few times until all the pores inside the PE membrane were completely lled with the ionic conductor (Fig. 1a); third, the external surfaces of the completely lled composite membrane were further coated with excess SPE, which was added as an interfacial layer to minimize the contact resistance with the electrodes.…”

“…The membrane was rendered amphiphilic by a monolayer connement of Pluronic F127 as described in our earlier publication. 26 The high molecular alignment and the topological arrangement of these nanobers endow the membrane with extraordinarily high mechanical strengths in an excess of 400 MPa. 31 The surface topology of the composite electrolyte LTSPE (Fig.…”

“…1d). 26 The nanoconfinement of F127 in the PE membrane leads to higher segmental mobility of PEO (see the molecular dynamics simulation below), giving rise to a fast Li ion transport. As a result, our ultrathin LTSPE features a high ionic conductance of 7.14 × 10 −2 S at 30 °C (7.5 times that of the Celgard-F127-SPE, Fig.…”

“…The preparation of an ultrathin PE membrane is described in detail elsewhere. [24][25][26] In brief, a HAAKE twin-screw extruder was used to prepare a PE gel lm from a raw PE material (GUR 4022, M w $ 3.5 Â 10 6 kg mol À1 ). The prepared 1 mm-thick gel lm was further hot stretched twice at 125 C in two perpendicular directions in sequence on an INSTRON 5567 universal testing machine.…”

A Versatile Strategy for the Fabrication of Poly(ethyl methacrylate) Composites

“…It is suggested that broad peaks of PEMA overlapped with nanocellulose peaks and were not observed in the X-ray diffraction pattern of the composite. It is also known that polymer amorphization can be observed in composites under the influence of another polymer or additive [48][49][50].…”