Electrolyte, electrochemical device, and electronic device

An electrochemical device, comprising a positive electrode plate, a negative electrode plate, a separator, and an electrolyte, wherein the electrolyte comprising a compound represented by formula I-A;

• wherein A1, A2, and A3 are each independently selected from formula I-B or formula I-C, and at least two of A1, A2, and A3 are formula I-C;
• wherein in formula I-A, n is selected from integers 1 to 10, and m is 1;
• wherein in formula I-B and formula I-C, represents a site at which two adjacent atoms are joined;
• wherein R11 and R13 are each independently selected from substituted or unsubstituted C2-C10 alkylene groups, substituted or unsubstituted C2-C10 alkenylene groups, substituted or unsubstituted C2-C10 alkynylene groups, substituted or unsubstituted C3-C10 allenylene groups, substituted or unsubstituted C6-C10 arylene groups, or substituted or unsubstituted C3-C10 alicyclic hydrocarbon groups, and when substituted, a substituent group comprises a halogen;
• and
• R12 is independently selected from halogens, substituted or unsubstituted C1-C10 alkyl groups, substituted or unsubstituted C2-C10 alkenyl groups, substituted or unsubstituted C2-C10 alkynyl groups, substituted or unsubstituted C3-C10 cumulative diene groups, substituted or unsubstituted C6-C10 aryl groups, or substituted or unsubstituted C3-C10 alicyclic hydrocarbon groups, and when substituted, a substituent group comprises a halogen;
• wherein the electrolyte further comprises a multi-nitrile compound, wherein the multi-nitrile compound comprises at least one of 1,2,3-tris(2-cyanoethoxy)propane, 1,3,6-hexanetricarbonitrile, 1,2-bis(2-cyanoethoxy)ethane, or adiponitrile, and
• wherein a ratio of a mass percentage of the compound represented by formula I-A to a mass percentage of the multi-nitrile compound is 0.01 to 1.

An electronic device, comprising an electrochemical device, the electrochemical device comprising a positive electrode plate, a negative electrode plate, a separator, and an electrolyte, wherein the electrolyte comprising a compound represented by formula I-A;

• wherein A1, A2, and A3 are each independently selected from formula I-B or formula I-C, and at least two of A1, A2, and A3 are formula I-C;
• wherein in formula I-A, n is selected from integers 1 to 10, and m is 1;
• wherein in formula I-B and formula I-C, represents a site at which two adjacent atoms are joined;
• wherein R11 and R13 are each independently selected from substituted or unsubstituted C2-C10 alkylene groups, substituted or unsubstituted C2-C10 alkenylene groups, substituted or unsubstituted C2-C10 alkynylene groups, substituted or unsubstituted C3-C10 allenylene groups, substituted or unsubstituted C6-C10 arylene groups, or substituted or unsubstituted C3-C10 alicyclic hydrocarbon groups, and when substituted, a substituent group comprises a halogen;
• and
• R12 is independently selected from halogens, substituted or unsubstituted C1-C10 alkyl groups, substituted or unsubstituted C2-C10 alkenyl groups, substituted or unsubstituted C2-C10 alkynyl groups, substituted or unsubstituted C3-C10 cumulative diene groups, substituted or unsubstituted C6-C10 aryl groups, or substituted or unsubstituted C3-C10 alicyclic hydrocarbon groups, and when substituted, a substituent group comprises a halogen,
• wherein the electrolyte further comprises a multi-nitrile compound, wherein the multi-nitrile compound comprises at least one of 1,2,3-tris(2-cyanoethoxy)propane, 1,3,6-hexanetricarbonitrile, 1,2-bis(2-cyanoethoxy)ethane, or adiponitrile, and
• wherein a ratio of a mass percentage of the compound represented by formula I-A to a mass percentage of the multi-nitrile compound is 0.01 to 1.