Understanding the Role of Mn Substitution for Boosting High-Voltage NaFeMn(PO)PO Cathode in Sodium-Ion Batteries.

NaFe(PO)PO is regarded as the most promising polyanionic cathode for sodium-ion batteries (SIBs) due to its superior structural stability, cost-effectiveness, and environmental benignity. However, the low operating voltage inevitably weakens its competitiveness in energy density. Previous works have tried to enhance its operating voltage by Mn doping, which draws on the design idea of LiFeMnPO cathode for lithium-ion batteries, but with little success.

A 3D COF constructed by interlayer crosslinking of 2D COF as cathode material for lithium-sulfur batteries.

The design and construction of three-dimensional covalent organic frameworks (3D COF) remains a major challenge, and it is necessary to explore new strategies to synthesize 3D COF with ideal structure. Here, we utilize two-dimensional covalent organic framework (2D COF) with allyl side chain to achieve interlayer crosslinking through olefin metathesis reaction, thereby constructing a 3D COF with cage-like structures. This new material named CAGE-COF has larger specific surface area and more open pore structure than the original 2D COF.

Excitation-Dependent Tunable White Light of ns Ions Doped RbSnCl Vacancy Ordered Double Perovskite.

Single-matrix white light-emitting diodes are still a challenge. Achieving tunable white light emission from lead-free perovskites attracts much attention. Herein, nanoscale RbSnCl (RSC) vacancy ordered double perovskite were synthesized by an optimized precipitation method.