【摘 要】
：
The application of lithium-ion batteries in cold climates has been hindered due to the decline in performance at low temperatures.The increased de-solvation energy and formation of Li dendrites at the anode surface emerge as the major challenges,which rel
【机 构】
：
Tianjin Key Laboratory of Advanced Functional Porous Materials,Institute for New Energy Materials an
论文部分内容阅读
The application of lithium-ion batteries in cold climates has been hindered due to the decline in performance at low temperatures.The increased de-solvation energy and formation of Li dendrites at the anode surface emerge as the major challenges,which rely on the development of stable anode and compatible electrolytes.Herein,a self-healing GalnSn liquid metal (LM) based electrode cou-pled with a multi-solvent electrolyte is proposed toward reversible Li-storage at low temperatures.By using methyl butyrate (MB) as a co-solvent in 1 mol·L-1 LiTFSI of ethylene carbonate and diethyl carbonate,the electrolyte viscosity decreases from 52.07 to 13.75 mPa·s,while the ionic conductivity increases from 1.38 to 3.44 mS·cm-1 at-20 ℃.Moreover,the Li/MXene@LM cells can display a discharge capacity of 500 mAh·g-1,with capacity retention of 78％ at-20 ℃ after 120 cycles.It is disclosed that a uniform LiF-rich sol-id electrolyte interface (SEI) layer on the anode is formed upon the addition of MB,which promotes the desolvation of Li ions at the interface of electrode/electrolyte especially at low temperatures.These results prove that MB as the co-solvent is well compatible with LM based anodes and holds great potential for the exploration of low-temperature energy devices.
其他文献
An HPLC-UV-guided separation was performed and four pairs of unprecedented macathiohydantoin dimers,lepithiohydimerins A-D(1-4) bearing a rare disulfide bond were isolated from the tubers of Maca.Their structures were unambiguously confirmed by NMR spectr
In the present work,an artificial light-harvesting system with fluorescence resonance energy transfer (FRET) is successfully fabricated in aqueous sodium dodecyl sulfonate (SDS) micellar systems.Since the tight and orderly arrangement of dodecyl in the SD
Five novel pterocarpan derivatives (1-5) and three known pterocarpans were isolated from the roots of Sophoraflavescens Ait.Their structures were elucidated based on extensive spectroscopic data (UV,IR,1D and 2D NMR,and HR-ESI-MS).Notably,compounds 1-5 we
A pair of new enantiomeric compounds,(R)/(S)-1,3,5-benzene-triyl-2,2\',2\"-tris(4,5-dihydrothiazole-4-carboxylic acid) (H3LRRR and H3Lsss) are synthesized in one step synthetic route with high yield.Instant photochromism has been investigated to elabo
Three diamines (1,8-diaminooctane/p-phenylenediamine/biphenylenediamine) with different alkyl groups were used to synthesize the functionalized graphene networks.Pd as the common metal catalyst was used to explore the effects of alkyl types of diamines on
Supramolecular polymer networks (SPNs) have always been the focus of research due to their novel features of good processability,stimuli-responsiveness,self-healing,and recyclability.Herein,we report the preparation of a metallacycle-linked supramolecular
An enzyme-free amperometric sensor based on a heptadecapeptide possessing an electroactive ferrocene (Fc) linker as ferro-cene-Gly-Gly-Gly-Gly-Phe-Gly-His-Ile-His-Glu-Gly-Tyr-Gly-Gly-Gly-Gly-Lys-(CH2)4-dithiocyclopentane self-assembled on gold substrate w
In this article,we report a base-promoted sequential cyclization/aldol-type condensation/isomerization cascade reaction of N-propargyl-β-enaminones with aryl aldehydes.The key step in this protocol is the generation of 1,4-oxazepine anions from N-propargy
By a strategy of fine-tuning of packing mode between the adjacent layers in a 2D net metal-organic frameworks (MOFs) through lig-and changing,two 2D sql-type MOFs with highly selective CO2 uptake,CuHIN and CuHPB,were successfully synthesized.Compared with
Developing an effective chemoselective ligation strategy for assembling unprotected peptide segments is important to peptide/pro-tein synthesis.The ligation efficiency and selectivity depend on the chemistry between the C-terminal active ester of the pept