摘要:
Provided are lithium anodes for use in electrochemical cells, where the anode active layer has a first layer comprising lithium metal and a second layer of a temporary protective material, wherein the temporary protective material is a metal capable of forming an alloy with lithium metal or is capable of diffusing into lithium metal. The present invention also pertains to methods of forming such anodes, electrochemical cells comprising such anodes, and methods of making such cells.
摘要:
The present invention pertains to composite cathodes suitable for use in an electrochemical cell, said cathodes comprising: (a) an electroactive sulfur-containing cathode material, wherein said electroactive sulfur-containing cathode material, in its oxidized state, comprises a polysulfide moiety of the formula -Sm-, wherein m is an integer equal to or greater than 3; and (b) an electroactive transition metal chalcogenide composition, which encapsulates said electroactive sulfur-containing cathode material, and which retards the transport of anionic reduction products of said electroactive sulfur-containing cathode material, said electroactive transition metal chalcogenide composition comprising an electroactive transition metal chalcogenide having the formula MjYk(OR)1, wherein: M is a transition metal; Y is the same or different at each occurrence and is oxygen, sulfur, or selenium; R is an organic group and is the same or different at each occurrence; j is an integer ranging from 1 to 12; k is a number ranging from 0 to 72; and l is a number ranging from 0 to 72, with the proviso that k and l cannot both be 0. The present invention also pertains to methods of making such composite cathodes, cells comprising such composite cathodes, and methods of making such cells.
摘要:
The present invention pertains to battery cells comprising: (a) an anode; (b) a composite cathode comprising a mixture of (i) an electroactive sulfur containing cathode material comprising one or more materials selected from the group consisting elemental sulfur, organo sulfur and carbon-sulfur compositions, and derivatives or combinations thereof; and (ii) an electrically conductive additive; (c) a liquid electrolyte comprising a solvent for at least some anionic reduction products of said cathode; and, (d) a separator interposed between said composite cathode and said anode; wherein said battery cell is characterized by a total thickness of the sum of the composite cathode thickness and the separator thickness of up to about 125 micrometers. The present invention also pertains to methods of making such cells. The battery cell attains a high specific capacity (mAh/g) over a number of cycles.
摘要:
The present invention pertains to methods of forming solid composite cathodes with cathode active layers which comprise an electroactive sulfur-containing material such as polysulfides and an electrically conductive material, wherein the electroactive sulfur-containing material is heated to a temperature above its melting point to form a melt layer and then is resolidified to form a cathode active layer having redistributed electroactive sulfur-containing material of high volumetric density and improved adhesion and cohesion. The present invention also pertains to methods of forming electric current producing cells comprising such solid composite cathodes and having a high electrochemical utilization and to solid composite cathodes and electric current producing cells formed using such methods.
摘要:
This invention pertains to separators for electrochemical cells which comprise (i) two microporous pseudo-boehmite layers and (ii) a protective coating layer comprising a polymer interposed between the microporous pseudo-boehmite layers; electrolyte elements comprising such separators; electrical current producing cells comprising such separators; and methods of making such separators, electrolyte elements and cells.
摘要:
The present invention relates to metal ion salts which can be used in electrolytes for producing electrochemical devices, including both primary and secondary batteries, photoelectrochemical cells and electrochromic displays. The salts have a low energy of dissociation and may be dissolved in a suitable polymer to produce a polymer solid electrolyte or in a polar aprotic liquid solvent to produce a liquid electrolyte. The anion of the salts may be covalently attached to polymer backbones to produce polymer solid electrolytes with exclusive cation conductivity.
摘要:
The present invention pertains to solid composite cathodes which comprise (a) an electroactive sulfur-containing cathode material which, in its oxydized state, comprises a polysulfide moiety of the formula, -S m -, wherein m is an integer from 3 to 10; and (b) a non-electroactive particulate material having a strong adsorption of soluble polysulfides. The present invention also pertains to electric current producing cells comprising such solid composite cathodes, and methods of making such solid composite cathodes and electric current producing cells.
摘要:
Provided are lithium anodes for use in electrochemical cells, where the anode active layer has a first layer comprising lithium metal and a second layer of a temporary protective material, wherein the temporary protective material is a metal capable of forming an alloy with lithium metal or is capable of diffusing into lithium metal. The present invention also pertains to methods of forming such anodes, electrochemical cells comprising such anodes, and methods of making such cells.