Silicon is considered the most promising candidate for anode material in lithium‐ion batteries due to the high theoretical capacity. Unfortunately, the vast volume change and low electric conductivity have limited the application of silicon anodes. In the silicon anode system, the binders are essential for mechanical and conductive integrity. However, there are few reviews to comprehensively introduce binders from the perspective of factors affecting performance and modification methods, which are crucial to the development of binders. In this review, several key factors that have great impact on binders’ performance are summarized, including molecular weight, interfacial bonding, and molecular structure. Moreover, some commonly used modification methods for binders are also provided to control these influencing factors and obtain the binders with better performance. Finally, to overcome the existing problems and challenges about binders, several possible development directions of binders are suggested.

The electroreduction of CO2 provides an attractive routine to produce hydrocarbons as an alternative of traditional petroleum chemical methods, as well as cobenefits the approach of CO2 emission control. Among various C2 hydrocarbons, C2H6 has the highest energy density but poor selectivity in CO2 electroreduction. Thus, the development of highly active catalysts and formation mechanism is desired. Herein, a facile method to synthesize iodide-doped Cu nanoarray (ID-Cu NA) catalysts and a strategy to boost C2H6 electrosynthesis was developed. ID-Cu NAs have dispersive iodide dopants on nanowires, which create a microenvironment to feed, stabilize, and hydrogenate C2H4. This catalyst displays a remarkable selectivity for C2H6 production. Impressively, ID-Cu NAs show a Faradaic efficiency of 24% for C2H6, five times higher than the corresponding Cu NAs before iodide doping. However, the Faradaic efficiency of C2H4 on Cu NAs decreases from 28 to 5% after iodide doping. The results of C2H4 electrodesorption and electrohydrogenation tests indicated that the iodide dopant contributed a more stable C2H4 adsorption and higher hydrogenation ability. Density functional theory calculations demonstrated that the doping of iodide helps to strengthen the adsorption of C2H4 on the Cu surface and lowers the energy barrier of the hydrogenation to C2H6, which simultaneously encourages C2H6 formation in CO2 electroreduction. This work also cleared up the origin of C2H6 formation in CO2 reduction reaction (CO2RR) in which a tandem pathway from CO2 → C2H4 to C2H4 → C2H6 is involved.

HA alleviated GFM-induced membrane damage by reducing oxidative stress and heteroaggregation.

In this work, a flower-like Nb2Se9 material was obtained by a simple oil-phase-assisted synthesis route and used as an anode in lithium-ion and sodium-ion batteries first. It exhibited a high charge capacity (672.35 mAh g–1 at 100 mA g–1), good cycling stability (596.63 mAh g–1 after 250 cycles at 100 mA g–1), and outstanding rate performance (285 mAh g–1 at 5 A g–1) in lithium-ion batteries. Meanwhile, the ex situ X-ray diffraction result reveals that the lithium storage mechanism of Nb2Se9 is the conversion reaction. As an anode for sodium-ion batteries, Nb2Se9 delivered an initial reversible capacity of 342.60 mAh g–1 at the current density of 100 mA g–1 and was stabilized at 230.36 mAh g–1 over 500 cycles after the initial 50 cycles. Excellent electrochemical performance may be attributed to the special micro–nano hierarchical structure of the flower-like Nb2Se9 material, which greatly promotes ion diffusion and provides abundant active sites. These results indicate that flower-like Nb2Se9 is a promising anode material for both lithium-ion and sodium-ion batteries.

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