Owing to the natural abundance and low cost of sodium resources, sodium‐ion batteries (SIBs) have drawn considerable attention for state‐of‐the‐art power storage devices over the last few years. To enable advanced SIBs with a brighter future, great effort has been made, not only through optimizing the electrode materials, but also with rationally designing various electrolyte systems. Among the available electrolyte systems, organic electrolytes, especially those based on esters as well as ethers, are the most promising ones for practical application in the foreseeable future, due to their numerous inherent advantages. This review is concerned with the recent research progresses on organic electrolytes for SIBs, focusing on ether‐based and ester‐based ones.

Structural modulation and surface engineering have remarkable advantages for fast and efficient charge storage. Herein, we present ap hosphorus modulation strategy which simultaneously realizes surface structural disorderwith interior atomic-level P-doping to boost the Na + storage kinetics of TiO 2 .I ti sf ound that the P-modulated TiO 2 nanocrystals exhibit af avourable electronic structure,a nd enhanced structural stability,N a + transfer kinetics,a sw ell as surface electrochemical reactivity,r esulting in ag enuine zero-strain characteristic with only approximately 0.

Electrochemical oxygen reduction reaction (ORR) in acids via a selective 2e- pathway offers great opportunities for electrosynthesis of H2O2, allowing on-site environmental treatment in industry. Unfortunately, despite some progress, the...

No abstract

No abstract

Two‐dimensional (2D) superlattices offer promising technological opportunities in tuning the intercalation chemistry of metal ions. Now, well‐ordered 2D superlattices of monolayer titania and carbon with tunable interlayer‐spacing are synthesized by a molecularly mediated thermally induced approach. The 2D superlattices are vertically encapsulated in hollow carbon nanospheres, which are embedded with TiO2 quantum dots, forming a 0D‐2D‐3D multi‐dimensional architecture. The multi‐dimensional architecture with the 2D superlattices encapsulated inside exhibits a near zero‐strain characteristic and enriched electrochemical reactivity, achieving a highly efficient Na+ storage performance with exceptional rate capability and superior long‐term cyclability.

Carbon-coated SiO is the most promising alternative to the graphite anode for improving the energy density of currently commercialized lithium-ion batteries but exhibits poor cyclic stability that leaves an unclear mechanism. To address this issue, the surface properties of commercial carbon-coated silicon monoxide are investigated in a 1.0 M LiPF6–dimethyl carbonate electrolyte with and without ethylene carbonate (EC), with a comparison of graphite. Unlike graphite that can work well in the electrolytes with and without EC during initial 30 cycles, carbon-coated SiO suffers a serious capacity decay, especially in the electrolyte without EC. By identifying the samples after various cycles, it is found that a relatively stable interphase that makes graphite work well cannot be built on carbon-coated SiO. The chemical analyses demonstrate that there is a strong interaction between SiO with hydrofluoric acid in the electrolyte, which leads to destruction of the carbon-coating layer and prevents the formation of a protective interphase.

H2O/DMF solvent ratio-tuned MnO microflakes serve as high-performance lithium storage anodes, further improved by CNTs assisted-synthesis.