摘要:
A negative electrode active material 1000 of the present disclosure includes: a graphite particle 100 having a void 102 inside; and a first solid electrolyte 103. The void 102 has a void size of 1 nm or more and 300 nm or less. The first solid electrolyte 103 is present in the void 102. The graphite particle 100 has, for example, a plurality of voids inside. The graphite particle 100 has an average void size, determined by a mercury intrusion method, of, for example, 1 nm or more and 300 nm or less.
摘要:
The present disclosure provides a solid electrolyte material having high lithium ion conductivity. The solid electrolyte material according to the present disclosure has a crystal structure including a structure framework and an ion-conductive species, wherein the structure framework has a one-dimensional chain in which a plurality of polyhedrons are linearly connected to each other while sharing a corner, and each of the plurality of polyhedrons contains at least one type of cation and at least one type of anion.
摘要:
In general, the invention relates to electrode materials, e.g., novel cathode materials with high density, low cost, and high safety. A voltage design strategy based on the mixing of different transition metals in crystal structures known to be able to accommodate lithium in insertion and delithiation is presented herein. By mixing a metal active on the +2/+3 couple (e.g., Fe) with an element active on the +3/+5 or +3/+6 couples (e.g., V or Mo), high capacity multi-electron cathodes are designed in an ad-equate voltage window.
摘要:
Provided is a method for producing a difluorophosphate, which can easily and industrially advantageously produce a high-purity difluorophosphate . The method includes a step of producing a difluorophosphate in the fluorophosphoric acid solution by reacting hydrofluoric acid anhydride containing no solvent with an oxoacid and/or the like of phosphorous to produce a fluorophosphoric acid solution; a step of adding a hexafluorophosphate to the fluorophosphoric acid solution in the absence of respective halides, carbonates, borates, phosphates, hydroxides, and oxides of an alkali metal and the like; and a step of heating and drying the fluorophosphoric acid solution containing the difluorophosphate to distill away a fluorophosphoric acid, or a step of depositing the difluorophosphate in the fluorophosphoric acid solution by crystallization, subsequently separating the difluorophosphate by solid-liquid separation, and distilling away a fluorophosphoric acid contained in the difluorophosphate after the solid-liquid separation.