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Aqueous Zn-ion batteries (AZIBs) have attracted strong attention for widespread applications because of their safety, cheapness and ecological amiability. Nevertheless, challenges exist at the Zn anode such as the side reactions. Here, a small amount of sulfolane (SL) (1 vol%) was added into the typical ZnSO4 electrolyte as an additive. Detailed studies shown that SL adjusts the solvation structure of Zn2+, reduces the water activity and regulates the Zn deposition. Consequently, the side reactions are suppressed. Therefore, with only addition of 1% SL, the symmetric cells exhibit long cycling...

Sodium (Na) is a promising anode material for sodium ion batteries due to its high theoretical capacity and favorable redox voltage, but the dendrite growth issue limits its practical application. Herein, an artificial hybrid interface layer based on an amorphous phosphatized hybrid (a-Na3P/NaBr) is developed to facilitate a homogeneous and dendrite-free lateral growth behavior during recurring sodium plating/stripping processes. The proposed Na metal anode delivers an excellent cycling performance for over 200 cycles with an average Coulombic efficiency 99.5% under the capacity of 3 mAh cm−...

Silver-zinc (Ag-Zn) batteries are a promising battery system for flexible electronics owing to their high safety, high energy density and stable output voltage. However, poor cycling performance, low areal capacity, and inferior flexibility limit the practical application of Ag-Zn batteries. Herein, we develop a flexible quasi-solid-state Ag-Zn battery system with superior performance by using mild electrolyte and binder-free electrodes. Copper foam current collector is introduced to impede the growth of Zn dendrite, and the structure of Ag cathode is engineered by electrodeposition and chlori...

Owing to several advantages of metallic sodium (Na), such as a relatively high theoretical capacity, low redox potential, wide availability, and low cost, Na metal batteries are being extensively studied, which are expected to play a major role in the fields of electric vehicles and grid-scale energy storage. Although considerable efforts have been devoted to utilizing MXene-based materials for suppressing Na dendrites, achieving a stable cycling of Na metal anodes remains extremely challenging due to, for example, the low Coulombic efficiency (CE) caused by the severe side reactions. Herein, ...

Room temperature sodium-ion batteries are the most likely alternative to lithium-ion batteries, and are considered one of the most promising candidates for large-scale energy storage. On the anode side, metallic sodium, with an ultra-high theoretical capacity and a low redox potential, has been considered the most promising material for batteries with a high energy density. However, the use of a sodium metal anode has met some challenging problems, such as the growth of sodium dendrites, side reactions between sodium metal and the electrolyte, and large volume changes during charge and dischar...