In this study,we present the first synthesis of ferroelectric crystals where the carbon vertices of carboranes are substituted with cycloalkane groups.These crystals include 1,2-(1,3-propanediyl)-o-carborane(1)and 1,2...In this study,we present the first synthesis of ferroelectric crystals where the carbon vertices of carboranes are substituted with cycloalkane groups.These crystals include 1,2-(1,3-propanediyl)-o-carborane(1)and 1,2-(1,4-hexanediyl)-o-carborane(2),both of which exhibit relatively high Curie temperatures at 328.6 K and 320.6 K.Notably,to the best of our knowledge,this represents the first instance of ferroelectric crystals derived from modifications at the carbon vertex of carborane.This discovery provides a valuable new avenue for research into novel carborane-based ferroelectrics and holds promise for advancing the broader application of ferroelectric materials.展开更多
Doping of heteroatoms into carbon not only changes the electronic distribution but also creates surface functional groups.These changes prove to enhance the chemical adsorption of carbon to sulphur species,and have be...Doping of heteroatoms into carbon not only changes the electronic distribution but also creates surface functional groups.These changes prove to enhance the chemical adsorption of carbon to sulphur species,and have been intensively investigated to sequestrate soluble lithium polysulphide in the cathode of lithium/sulphur(Li/S)batteries.The chemical adsorption varies with the type,valence state and content of heteroatoms in a complicated manner.In this review,the syntheses of heteroatom-doped carbons as well as their applications and mechanisms in the Li/S batteries are highlighted and discussed with a focus on oxygen,sulphur,nitrogen and their mixtures.展开更多
基金supported by the National Natural Science Foundation of China(22071094 and 22075123)the Jiangxi Provincial Natural Science Foundation(20213BCJ22055 and 20224ACB203004).
文摘In this study,we present the first synthesis of ferroelectric crystals where the carbon vertices of carboranes are substituted with cycloalkane groups.These crystals include 1,2-(1,3-propanediyl)-o-carborane(1)and 1,2-(1,4-hexanediyl)-o-carborane(2),both of which exhibit relatively high Curie temperatures at 328.6 K and 320.6 K.Notably,to the best of our knowledge,this represents the first instance of ferroelectric crystals derived from modifications at the carbon vertex of carborane.This discovery provides a valuable new avenue for research into novel carborane-based ferroelectrics and holds promise for advancing the broader application of ferroelectric materials.
文摘Doping of heteroatoms into carbon not only changes the electronic distribution but also creates surface functional groups.These changes prove to enhance the chemical adsorption of carbon to sulphur species,and have been intensively investigated to sequestrate soluble lithium polysulphide in the cathode of lithium/sulphur(Li/S)batteries.The chemical adsorption varies with the type,valence state and content of heteroatoms in a complicated manner.In this review,the syntheses of heteroatom-doped carbons as well as their applications and mechanisms in the Li/S batteries are highlighted and discussed with a focus on oxygen,sulphur,nitrogen and their mixtures.
