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The Li-O battery (LOB) is considered as a promising next-generation energy storage device because of its high theoretic specific energy. To make a practical rechargeable LOB, it is necessary to ensure the stability of the Li anode in an oxygen atmosphere, which is extremely challenging. In this work, an effective Li-anode protection strategy is reported by using boric acid (BA) as a solid electrolyte interface (SEI) forming additive. With the assistance of BA, a continuous and compact SEI film is formed on the Li-metal surface in an oxygen atmosphere, which can significantly reduce unwanted side reactions and suppress the growth of Li dendrites. Such an SEI film mainly consists of nanocrystalline lithium borates connected with amorphous borates, carbonates, fluorides, and some organic compounds. It is ionically conductive and mechanically stronger than conventional SEI layer in common Li-metal-based batteries. With these benefits, the cycle life of LOB is elongated more than sixfold.

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Using a solid‐state electrolyte (SSE) to stabilize the Li metal anode is widely considered a promising route to develop next‐generation high energy density lithium batteries. Here, a new polycrystalline aluminate‐based SSE (named Li–Al–O SSE) with good capability is introduced to protect Li metal. The SSE is formed on the Li metal surface via a chemical reaction between LiOH and triethylaluminum (TEAL) with the existence of LiTFSI‐based electrolyte. It is a continuous film that consists of polycrystalline LiAlO2, Li3AlO3, Al2O3, Li2CO3, LiF, and some organic compounds. Such Li–Al–O SSE possesses a room‐temperature ionic conductivity as high as 1.42 × 10−4 S cm−1. Meanwhile, it effectively protects the Li anode from the corrosion of H2O, O2, and organic solvent, and suppresses the growth of Li dendrite. With the protection of the Li–Al–O SSE, the cycle life of Li|Li symmetric cell and Li|O2 cell is substantially elongated, indicating that the SSE exhibits an excellent protective effect under both inert and oxidizing circumstances.

Ether-based electrolytes are commonly used in Li-O 2 batteries (LOBs) because of their relatively high stability.But they are still prone to be attacked by superoxides or singlet oxygen via hydrogen abstract reactions,w hich leads to performance decaying during long-term operation. Herein we propose am ethylated cyclic ether,2 ,2,4,4,5,5-hexamethyl-1,3dioxolane (HMD), as as table electrolyte solvent for LOBs. Such acompound does not contain any hydrogen atoms on the alpha-carbon of the ether,a nd thus avoids hydrogen abstraction reactions.A st he result, this solvent exhibits excellent stability with the presence of superoxideo rs inglet oxygen. In addition the CO 2 evolution during charge process is prohibited. The LOB with HMD-based electrolyte was able to run up to 157 cycles,4times more than with 1,3-dioxolane (DOL) or 1,2dimethoxyethane (DME) based electrolytes.Lithium-oxygen battery (LOB) has inspired much enthusiasm from researchers because of its high theoretical energy density. [1] However,s ome problems,s uch as low round-trip efficiency, [2] poor reversibility, [3] and inferior electrolyte stability hinder its practical application. [4] At ypical nonaqueous Li-O 2 battery stores/releases energy with the reversible electrochemical reaction between Li + and O 2 .D uring this process,some oxidizing intermediates,such as LiO 2 ,O 2 2ÀSupportinginformation and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

Three types of alkylated peri-xanthenoxanthene (PXX) have been synthesized employing efficient synthetic routes. These heteroaromatic compounds exhibited different electronic and crystal structures according to UV-vis spectra, electrochemical measurements, and X-ray structural analyses. Among them, 1,7-DOPXX has been demonstrated as an active material for organic field-effect transistors with promising mobility and a high on/off ratio simultaneously.

Highly conductive indium tin oxide (ITO) nanocrystals and inks have been synthesized by solvothermal dehydration condensation of metal hydroxide in combination with in-situ ethanolamine capping. It is found that the addition of ethanolamine can effectively reduce the size of nanocrystals and chemically modify their surfaces. The synthesized ITO nanocrystals can be well dispersed in ethanol with high solid content and the suspension is stable for days. Such small-molecule capped ITO suspension has been used as a conductive ink to make transparent conductive films by spin coating. Furthermore, a water washing step has been introduced in the ITO film preparation process to improve its conductivity, resulting in low resistivity of 8.9×10 -3 Ω•cm after 2 hours annealing at 300 o C in mixed Ar and H 2 atmosphere.Graphical Abstract ITO ink are synthesised by addition of different concentration ethanolamine in reaction. A water washing step has been introduced in the ITO film preparation process to improve its conductivity, resulting in low resistivity high-quality films.