Kleptomania is a kind of uncontrollable impulse and behavior of stealing,and it is also a serious disease.At present,studies on pathological theft at home and abroad are not sufficient,and the understanding of the sym...Kleptomania is a kind of uncontrollable impulse and behavior of stealing,and it is also a serious disease.At present,studies on pathological theft at home and abroad are not sufficient,and the understanding of the symptoms,etiology and treatment of this disease is very insufficient.This article focuses on the latest development of symptoms, etiology and treatment of kleptomania,providing a reference for people to further identify, treat and study the disease.展开更多
All-solid-state lithium-sulfur(Li-S)battery is regarded as next-generation high energy density and safety battery system.The key challenge is to develop a compatible high-performance solid-state electrolyte.Herein,a t...All-solid-state lithium-sulfur(Li-S)battery is regarded as next-generation high energy density and safety battery system.The key challenge is to develop a compatible high-performance solid-state electrolyte.Herein,a two birds with one stone strategy is proposed to simultaneously enhance Li+conductivity and polysulfide adsorptivity of poly(ethylene oxide)(PEO)-based polymer electrolyte via the integration of Nb_(2)CT_(x)MXene.Moreover,the sheet size of Nb_(2)CT_(x)MXene is crucial for the enhancement of Li^(+)conductivity and polysulfide adsorptivity,attributing to the difference in a specific surface area related to the percolation effect.By tuning the sheet size of Nb_(2)CT_(x)MXene from 500-300 nm to below 100 nm,the ionic conductivity of the PEO electrolyte is increased to2.62×10^(-4)S·cm^(-1)with improved Li+transference number of 0.37 at 600C.Furthermore,theoretical calculation and X-ray photoelectron spectroscopy(XPS)conjointly prove that poly sulfides could be effectively adsorbed by Nb2CTxnanosheets via forming Nb-S bonding to inhibit their shuttle in the PEO framework.As a result,the all-solid-state Li-S cell exhibits an initial capacity of 1149 mAh·g^(-1)at 0.5C and good cycling stability with 491 mAh·g^(-1)after 200 cycles.The results demonstrate the necessity of polysulfide inhibition and the application of Nb_(2)CT_(x)MXene in PEO-based electrolytes for all-solid-state Li-S batteries.展开更多
文摘Kleptomania is a kind of uncontrollable impulse and behavior of stealing,and it is also a serious disease.At present,studies on pathological theft at home and abroad are not sufficient,and the understanding of the symptoms,etiology and treatment of this disease is very insufficient.This article focuses on the latest development of symptoms, etiology and treatment of kleptomania,providing a reference for people to further identify, treat and study the disease.
基金financially supported by the State Key Laboratory of Powder Metallurgy,Hunan Provincial Natural Science Foundation of China(No.2020JJ4107)the InnovationDriven Project of Central South University(No.2020CX037)+2 种基金the Postgraduate Scientific Research Innovation Project of Hunan Province(No.QL20220021)the National Natural Science Foundation of China(No.51802352)the Science and Technology Innovation Leading Project of High-Tech Industry of Hunan Province,China(No.2020GK2067)。
文摘All-solid-state lithium-sulfur(Li-S)battery is regarded as next-generation high energy density and safety battery system.The key challenge is to develop a compatible high-performance solid-state electrolyte.Herein,a two birds with one stone strategy is proposed to simultaneously enhance Li+conductivity and polysulfide adsorptivity of poly(ethylene oxide)(PEO)-based polymer electrolyte via the integration of Nb_(2)CT_(x)MXene.Moreover,the sheet size of Nb_(2)CT_(x)MXene is crucial for the enhancement of Li^(+)conductivity and polysulfide adsorptivity,attributing to the difference in a specific surface area related to the percolation effect.By tuning the sheet size of Nb_(2)CT_(x)MXene from 500-300 nm to below 100 nm,the ionic conductivity of the PEO electrolyte is increased to2.62×10^(-4)S·cm^(-1)with improved Li+transference number of 0.37 at 600C.Furthermore,theoretical calculation and X-ray photoelectron spectroscopy(XPS)conjointly prove that poly sulfides could be effectively adsorbed by Nb2CTxnanosheets via forming Nb-S bonding to inhibit their shuttle in the PEO framework.As a result,the all-solid-state Li-S cell exhibits an initial capacity of 1149 mAh·g^(-1)at 0.5C and good cycling stability with 491 mAh·g^(-1)after 200 cycles.The results demonstrate the necessity of polysulfide inhibition and the application of Nb_(2)CT_(x)MXene in PEO-based electrolytes for all-solid-state Li-S batteries.