Garnet oxide is one of the most promising solid electrolytes for solid-state lithium metal batteries. However, the traditional interface modification layers cannot completely block electron migrating from the current collector to the interior of the solid-state electrolyte, which promotes the penetration of lithium dendrites. In this work, a highly electron-blocking interlayer composed of potassium fluoride (KF) is deposited on garnet oxide Li_6.4La₃Zr_1.4Ta_0.6O₁₂ (LLZTO). After reacting with melted lithium metal, KF in-situ transforms to KF/LiF interlayer, which can block the electron leakage and inhibit lithium dendrite growth. The Li symmetric cells using the interlayer show a long cycle life of ~3000 hours at 0.2 mA cm⁻² and over 350 hours at 0.5 mA cm⁻² respectively. Moreover, an ionic liquid of LiTFSI in C₄mim-TFSI is screened to wet the LLZTO|LiNi_0.8Co_0.1Mn_0.1O₂ (NCM) positive electrode interfaces. The Li|KF-LLZTO | NCM cells present a specific capacity of 109.3 mAh g⁻¹, long lifespan of 3500 cycles and capacity retention of 72.5% at 25 °C and 2 C (380 mA g⁻¹) with an average coulombic efficiency of 99.99%. This work provides a simple and integrated strategy on high-performance quasi-solid-state lithium metal batteries.

CoS/FeS₂ heterojunction nanosheets on a MXene with excellent electrocatalytic OER performance are realized by a dual molten salt etching strategy.

The O-vacancy in bulk VO₂ gives rise to an increase in electron concentration, which induces a decrease in T_c. While, O-vacancy and O-adsorption on VO₂(R) (1 1 0) and VO₂(M) (0 1 1) surfaces could alter the work functions and in turn regulate T_c.

Reconfigurable optical systems are the object of continuing, intensive research activities, as they hold great promise for realizing a new generation of compact, miniaturized, and flexible optical devices. However, current reconfigurable systems often tune only a single state variable triggered by an external stimulus, thus, leaving out many potential applications. Here we demonstrate a reconfigurable multistate optical system enabled by phase transitions in vanadium dioxide (VO₂). By controlling the phase-transition characteristics of VO₂ with simultaneous stimuli, the responses of the optical system can be reconfigured among multiple states. In particular, we show a quadruple-state dynamic plasmonic display that responds to both temperature tuning and hydrogen-doping. Furthermore, we introduce an electron-doping scheme to locally control the phase-transition behavior of VO₂, enabling an optical encryption device encoded by multiple keys. Our work points the way toward advanced multistate reconfigurable optical systems, which substantially outperform current optical devices in both breadth of capabilities and functionalities.