Abstract:
A positive electrode active material for a sodium ion battery includes a sodium complex oxide of the formula Na4(M1aM21−a)2O5 having an orthorhombic crystal structure, wherein M1 and M2 are each independently Ti, Cr, Fe, Co, Ni, Mn, V, or a combination there of provided that M1 and M2 are different from each other; and 0≤a≤1.
Abstract:
A method for charging a battery includes: determining a first charging section, in which a current charging rate of the battery is located, from among a plurality of charging sections predetermined based on a functional relation between a state of charge of the battery and an open circuit voltage of an anode of the battery; and charging the battery for the first charging section with a first charging rate corresponding to the first charging section.
Abstract:
A mixture stability criterion asserts that a mixture of at least two redox elements in a crystal lattice will be unstable during charge and discharge cycles unless a set of charged ground state configurations at a specified value of a mixing ratio for the redox elements and a set of discharged ground state configurations at the same value of mixing ratio both consist of the same derivative superstructures. All members of the charged ground state set and all members of the discharged ground state set are within a same energy threshold value of the lowest-energy member of each set. The value for the energy threshold may represent a value of thermal energy calculated with Boltzmann's constant. Examples of alternative embodiments include a method for implementing the mixture stability criterion, computer hardware adapted to perform a method embodiment, and computer-readable media including a method embodiment.
Abstract:
A sodium-conductive solid-state electrolyte material includes a compound of the composition Na10MP2S12, wherein M is selected from Ge, Si, and Sn. The material may have a conductivity of at least 1.0×10−5 S/cm at a temperature of about 300K and may have a tetragonal microstructure, e.g., a skewed P1 crystallographic structure. Also provided are an electrochemical cell that includes the sodium-conductive solid-state electrolyte material and a method for producing the sodium-conductive solid electrolyte material via controlled thermal processing parameters.
Abstract translation:导电固态电解质材料包括组成Na 10 MP 2 S 12的化合物,其中M选自Ge,Si和Sn。 该材料在约300K的温度下可以具有至少1.0×10 -5 S / cm的导电率,并且可以具有四方晶系微结构,例如倾斜的P1晶体结构。 还提供了包括导电固态电解质材料的电化学电池以及通过受控热处理参数制备导电固体电解质材料的方法。
Abstract:
A method for charging a battery includes: determining a first charging section, in which a current charging rate of the battery is located, from among a plurality of charging sections predetermined based on a functional relation between a state of charge of the battery and an open circuit voltage of an anode of the battery; and charging the battery for the first charging section with a first charging rate corresponding to the first charging section.
Abstract:
A positive electrode active material for a sodium ion battery includes a sodium complex oxide of the formula Na4(M1aM21−a)2O5 having an orthorhombic crystal structure, wherein M1 and M2 are each independently Ti, Cr, Fe, Co, Ni, Mn, V, or a combination there of provided that M1 and M2 are different from each other; and 0≤a≤1.
Abstract:
A sodium-conductive solid-state electrolyte material includes a compound of the composition Na10MP2S12, wherein M is selected from Ge, Si, and Sn. The material may have a conductivity of at least 1.0×10−5 S/cm at a temperature of about 300K and may have a tetragonal microstructure, e.g., a skewed P1 crystallographic structure. Also provided are an electrochemical cell that includes the sodium-conductive solid-state electrolyte material and a method for producing the sodium-conductive solid electrolyte material via controlled thermal processing parameters.
Abstract:
Provided are electrochemical cells that include a compound having the general formula wherein R1 is moiety associated with a lithium ion, X1 and X3 are unsubstituted methylene moieties, X2 and X4 are each independently selected from a substituted or unsubstituted methylene moiety, X is a substituted or unsubstituted C1-C10 alkylene moiety, arylene moiety or heteroarylene moiety, R2 is selected from Li, H, an alkyl moiety, or a heteroalkyl moiety, 0
Abstract:
Provided are electrochemical cells that include a compound having the general formula wherein R1 is moiety associated with a lithium ion, X1 and X3 are unsubstituted methylene moieties, X2 and X4 are each independently selected from a substituted or unsubstituted methylene moiety, X is a substituted or unsubstituted C1-C10 alkylene moiety, arylene moiety or heteroarylene moiety, R2 is selected from Li, H, an alkyl moiety, or a heteroalkyl moiety, 0
Abstract:
A mixture stability criterion asserts that a mixture of at least two redox elements in a crystal lattice will be unstable during charge and discharge cycles unless a set of charged ground state configurations at a specified value of a mixing ratio for the redox elements and a set of discharged ground state configurations at the same value of mixing ratio both consist of the same derivative superstructures. All members of the charged ground state set and all members of the discharged ground state set are within a same energy threshold value of the lowest-energy member of each set. The value for the energy threshold may represent a value of thermal energy calculated with Boltzmann's constant. Examples of alternative embodiments include a method for implementing the mixture stability criterion, computer hardware adapted to perform a method embodiment, and computer-readable media including a method embodiment.