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US 12,725,832 B2Granted
Electrolytes for silicon-containing electrodes
AssigneeGM Global Technology Operations LLC
InventorsDewen Kong, Haijing Liu, Si Chen, Mengyan Hou, Mark W. Verbrugge
Life of this patent
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Abstract
An electrochemical cell that cycles lithium ions includes a positive electrode that includes a positive electroactive material, a negative electrode that includes a silicon-containing negative electroactive material, a separating layer disposed between the positive electrode and the negative electrode, and an electrolyte that is in contact with at least one of the positive electroactive material, the negative electroactive material, and the separating layer. The electrolyte includes greater than or equal to about 0.1 wt. % to less than or equal to about 10 wt. % of a phosphite-type additive.
Claims18
An electrode for an electrochemical cell that cycles lithium ions, the electrode comprising:
- a silicon-containing electroactive material;
- and
- an electrolyte comprising greater than or equal to about 0.1 wt. % to less than or equal to about 10 wt. % of a phosphite-type additive represented by:
- where R1 is selected from trimethylsilyl, linear or branched alkyl (CnH2n+1, where 1≤n≤20), linear or branched alkene (CnH2n, where 1≤n≤20), linear or branched CnM2n+1 (where 1≤n≤20 and M is selected from the group consisting of:
- fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and combinations thereof), linear or branched CnM2n (where 1≤n≤20 and M is selected from the group consisting of:
- fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and combinations thereof), phenyl group, mono-substituted phenyl group where the substituted group is a linear or branched alkyl (CnH2n+1, where 1≤n≤20), di-substituted phenyl group where the substituted groups comprise a linear or branched alkyl (CnH2n+1, where 1≤n≤20), tri-substituted phenyl group where the substituted groups comprise a linear or branched alkyl (CnH2n+1, where 1≤n≤20), nitrogen, cyanogen, fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).
3 more elements
An electrochemical cell that cycles lithium ions, the electrochemical cell comprising:
- a positive electrode comprising a positive electroactive material;
- a negative electrode comprising a silicon-containing negative electroactive material;
- a separating layer disposed between the positive electrode and the negative electrode;
- and
- an electrolyte in contact with at least one of the positive electroactive material, the negative electroactive material, and the separating layer, the electrolyte comprising greater than or equal to about 0.1 wt. % to less than or equal to about 10 wt. % of a phosphite-type additive represented by:
- where R1 is selected from trimethylsilyl, linear or branched alkyl (CnH2n+1, where 1≤n≤20), linear or branched alkene (CnH2n, where 1≤n≤20), linear or branched CnM2n+1 (where 1≤n≤20 and M is selected from the group consisting of:
- fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and combinations thereof), linear or branched CnM2n (where 1≤n≤20 and M is selected from the group consisting of:
- fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and combinations thereof), phenyl group, mono-substituted phenyl group where the substituted group is a linear or branched alkyl (CnH2n+1, where 1≤n≤20), di-substituted phenyl group where the substituted groups comprise a linear or branched alkyl (CnH2n+1, where 1≤n≤20), tri-substituted phenyl group where the substituted groups comprise a linear or branched alkyl (CnH2n+1, where 1≤n≤20), nitrogen, cyanogen, fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).
5 more elements
An electrochemical cell that cycles lithium ions, the electrochemical cell comprising:
- a positive electrode comprising a positive electroactive material;
- a negative electrode comprising a negative electroactive material, the negative electroactive material comprising LiySiOx (where 0<y<1 and 0<x<2) and a carbonaceous electroactive material;
- a separating layer disposed between the positive electrode and the negative electrode;
- and
- an electrolyte in contact with at least one of the positive electroactive material, the negative electroactive material, and the separating layer, the electrolyte comprising greater than or equal to about 0.1 wt. % to less than or equal to about 10 wt. % of a phosphite-type additive represented by:
- where R1 is selected from trimethylsilyl, linear or branched alkyl (CnH2n+1, where 1≤n≤20), linear or branched alkene (CnH2n, where 1≤n≤20), linear or branched CnM2n+1 (where 1≤n≤20 and M is selected from the group consisting of:
- fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and combinations thereof), linear or branched CnM2n (where 1≤n≤20 and M is selected from the group consisting of:
- fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and combinations thereof), phenyl group, mono-substituted phenyl group where the substituted group is a linear or branched alkyl (CnH2n+1, where 1≤n≤20), di-substituted phenyl group where the substituted groups comprise a linear or branched alkyl (CnH2n+1, where 1≤n≤20), tri-substituted phenyl group where the substituted groups comprise a linear or branched alkyl (CnH2n+1, where 1≤n≤20), nitrogen, cyanogen, fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).
5 more elements
Dependencies are inferred from the claim text.