In Situ Grown CsAgNaInCl Double Perovskites within a PVDF Matrix for High-Performance Flexible Piezoelectric Nanogenerators.

Incorporating perovskite nanocrystals (PNCs) into poly(vinylidene fluoride) (PVDF) is an effective method to improve the performance of PVDF-based piezoelectric nanogenerators (PENGs). The conventional techniques are typically performed via a two-step process, namely, the synthesis of PNCs and then introducing them into the PVDF matrix. Here, we report the exploration of flexible PENG with boosted performance by in situ growth of Zr-doped CsAgNaInCl double perovskites (ZCDP) within the PVDF matrix (PENG).

Development and Vertical Tests of CEPC 650-MHz Single-Cell Cavities with High Gradient.

A circular electron positron collider (CEPC) will adopt hundreds of 650-MHz superconducting cavities with high quality factor () and accelerating gradient (). Two 650-MHz single-cell cavities made of fine-grain niobium were first treated via buffered chemical polishing (BCP), which was easy and convenient. However, the vertical test results could not meet the specification of the CEPC (4 × 10 at 22 MV/m).