CN103094616A - Electrolyte additive, high-voltage electrolyte and lithium ion battery containing electrolyte additive - Google Patents
Electrolyte additive, high-voltage electrolyte and lithium ion battery containing electrolyte additive Download PDFInfo
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- CN103094616A CN103094616A CN2013100355413A CN201310035541A CN103094616A CN 103094616 A CN103094616 A CN 103094616A CN 2013100355413 A CN2013100355413 A CN 2013100355413A CN 201310035541 A CN201310035541 A CN 201310035541A CN 103094616 A CN103094616 A CN 103094616A
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Abstract
The invention discloses an electrolyte additive, a high-voltage electrolyte and a lithium ion battery containing the electrolyte additive. The high-voltage electrolyte is prepared by adding the electrolyte additive into the conventional electrolyte; the conventional electrolyte comprises a non-aqueous organic solvent and lithium salt, wherein the content of the non-aqueous organic solvent is 80-85 percent of the total mass; the mass of the electrolyte additive is 0.01-10 percent of the total mass; and the electrolyte additive is maleic anhydride C4H2O3 or one of derivatives thereof and has the structure formula as shown in the abstract. According to the high-voltage electrolyte, a stable interfacial film can be formed on the surfaces of a positive electrode and a negative electrode, the reaction activity on the electrode surface is inhibited, oxidative decomposition of the electrolyte is reduced, and gas swelling is effectively inhibited, so that the safety performance and the cycle performance of the lithium ion battery under normal pressure and high voltage are improved and the service life of the lithium ion battery under normal pressure and high voltage is prolonged. The electrolyte is simple in preparation process and is suitable for industrial production.
Description
Technical field
The present invention relates to a kind of lithium ion battery that can improve at 3～4.5VLi/Li
+Under cycle performance and the electrolysis additive in useful life and contain high voltage electrolyte and the lithium ion battery of this electrolysis additive.
Background technology
In recent years along with the development of universal, electric tool and the electric automobile of portable electric appts, obtained paying close attention to widely as the lithium ion battery of high capacity power source of new generation.At present, the positive electrode of business-like lithium ion battery mainly contains LiMn2O4, cobalt acid lithium, ternary material, LiFePO4 etc., and its charge cutoff voltage generally is no more than 4.2V.But the development in market is had higher requirement to lithium ion battery---guaranteeing or improving on the basis of original energy density day by day to require lighter and more thinning, is the emphasis of studying at present thereby the use voltage that therefore promotes lithium ion battery improves the energy density of battery.
LiMn2-xLixO4, the LiMn2-xMxO4 of multiple high-tension positive electrode such as spinel structure and the LiMPO4 of olivine structural etc. have been developed at present.But along with the raising of using voltage, conventional electrolyte is except the autoxidation decomposition reaction occurs, also can be in oxidation Decomposition on the positive electrode surface, thereby the positive electrode that contains transition metal has more played the oxidation that catalytic action has promoted electrolyte, finally cause the rising of the internal resistance of cell, cycle performance destroys, and has shortened the useful life of battery.The obstruction that the matching problem of electrolyte is serious the exploitation of high-voltage lithium ion batteries, be most convenient and the economic method that improves performance of lithium ion battery by add a small amount of electrolysis additive in the lithium-ion battery electrolytes of routine.
Summary of the invention
Technical problem to be solved by this invention is to reduce the surface activity of positive electrode, the oxidation Decomposition that suppresses electrolyte, a kind of electrolysis additive is provided and contains high voltage electrolyte and the lithium ion battery of this electrolysis additive, this electrolysis additive can improve high-voltage lithium ion batteries cycle performance and useful life at normal temperatures.
In order to achieve the above object, technical scheme of the present invention comprises following content:
A kind of electrolysis additive, described electrolysis additive are maleic anhydride C
4H
2O
3Perhaps a kind of in its derivative, its structure is as follows:
Wherein R1, R2 are any one in following situation:
Carbon number is 1～6 straight chained alkyl;
The carbon number that part hydrogen or whole hydrogen are replaced by halogen is 1～6 straight chained alkyl;
The alkyl that contains the ternary carbocyclic ring;
The alkyl that contains the ternary carbocyclic ring that part hydrogen or whole hydrogen are replaced by halogen;
Contain the quaternary carbocyclic ring alkyl;
The alkyl or phenyl that contains the quaternary carbocyclic ring that part hydrogen or whole hydrogen are replaced by halogen;
Phenyl, benzyl or cyano group that part hydrogen or whole hydrogen are replaced by halogen.
A kind of high voltage electrolyte that contains electrolysis additive, high voltage refer at 3～4.5V, add above-mentioned electrolysis additive to make high voltage electrolyte in conventional electrolysis liquid; Conventional electrolysis liquid comprises non-aqueous organic solvent and lithium salts; The content of non-aqueous organic solvent is 80%～85% of gross weight, and the electrolysis additive quality is 0.01%～10% of gross weight.
As preferably, described electrolysis additive content is 0.2%～5% of gross weight.
As preferably, described lithium salts is lithium hexafluoro phosphate (LiPF
6), hexafluoroarsenate lithium (LiAsF
6), lithium perchlorate (LiClO
4), LiBF4 (LiBF
4), dioxalic acid lithium borate (LiBOB), difluorine oxalic acid boracic acid lithium (LiDFOB), pyrovinic acid lithium (LiCH
3SO
3), trifluoromethyl sulfonic acid lithium (LiCF
3SO
3), bis trifluoromethyl sulfimide lithium (LiN (CF
3SO
2)
2) in any one or several mixture wherein; The concentration of lithium salts is 0.5M～1.5M.
As preferably, the concentration of described lithium salts is the lithium hexafluoro phosphate (LiPF of 1M
6).
as preferably, described non-aqueous organic solvent be organic solvent under nitrogen or inert gas shielding, make through decompression distillation purification and molecular sieve dehydration, described non-aqueous organic solvent is ethylene carbonate, propene carbonate, butylene, gamma-butyrolacton, dipropyl carbonate, the N-methyl pyrrolidone, the N-methylacetamide, the N-methylformamide, dimethyl formamide, diethylformamide, acetonitrile, succinonitrile, adiponitrile, glutaronitrile, methyl-sulfoxide, dimethyl sulfite, vinylene carbonate, methyl propyl carbonate, 1, the 3-dioxolanes, 1, the 2-diethoxyethane, 1, the 2-dimethoxy-ethane, 1, the 2-dibutoxy, oxolane, the 2-methyltetrahydrofuran, expoxy propane, ethyl acetate, methyl acetate, methyl butyrate, ethyl butyrate, methyl propionate, ethyl propionate, dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate, the mixture of any one or several compositions in propyl acetate and ionic liquid at room temperature.
as preferably, the room temperature fuse salt that described ionic liquid at room temperature is comprised of cation and anion, cation comprises alkyl imidazolium cation, piperidines cation, pyroles cation, pyridines cation, season Ammonia cation, season phosphine cationoid, anion comprises tetrafluoroborate anion, hexafluoro-phosphate radical anion, two (fluorine sulphonyl) imines anion, two (perfluoroalkyl sulphonyl) imines anion, described ionic liquid at room temperature specifically comprises: 1-ethyl, 3-methylimidazole tetrafluoro boric acid, the 1-ethyl, 3-methylimidazole hexafluorophosphoric acid, the 1-ethyl, two (fluorine sulphonyl) imines of 3-methylimidazole, the 1-ethyl, 3-methylimidazole two (the yellow acyl of trifluoromethyl) imines, the 1-propyl group, 3-methylimidazole tetrafluoro boric acid, the 1-propyl group, 3-methylimidazole hexafluorophosphoric acid, the 1-propyl group, two (fluorine sulphonyl) imines of 3-methylimidazole, the 1-propyl group, two (trimethyl fluoride sulfonyl) imines of 3-methylimidazole, the 1-butyl, 3-methylimidazole tetrafluoro boric acid, the 1-butyl, 3-methylimidazole hexafluorophosphoric acid, the 1-butyl, two (fluorine sulphonyl) imines of 3-methylimidazole, the 1-butyl, two (trimethyl fluoride sulfonyl) imines of 3-methylimidazole, the N-methyl, N-propyl group piperidines tetrafluoro boric acid, the N-methyl, N-propyl group piperidines hexafluorophosphoric acid, the N-methyl, two (fluorine sulphonyl) imines of N-propyl group piperidines, the N-methyl, two (trimethyl fluoride sulfonyl) imines of N-propyl group piperidines, the N-methyl, N-butyl piperidine tetrafluoro boric acid, the N-methyl, N-butyl piperidine hexafluorophosphoric acid, the N-methyl, two (fluorine sulphonyl) imines of N-butyl piperidine, the N-methyl, two (trimethyl fluoride sulfonyl) imines of N-butyl piperidine, the N-methyl, N-propyl pyrrole tetrafluoro boric acid, the N-methyl, N-propyl pyrrole hexafluoro boric acid, the N-methyl, two (fluorine sulphonyl) imines of N-propyl pyrrole, the N-methyl, two (trifluoro sulphonyl) imines of N-propyl pyrrole, the N-methyl, N-butyl pyrroles tetrafluoro boric acid, the N-methyl, N-butyl pyrroles hexafluorophosphoric acid, the N-methyl, two (fluorine sulphonyl) imines of N-butyl pyrroles, the N-methyl, two (trimethyl fluoride sulfonyl) imines of N-butyl pyrroles, the N-methyl, N-propyl group pyridinium tetrafluoroborate, the N-methyl, N-propyl group pyridine hexafluorophosphoric acid, the N-methyl, two (fluorine sulphonyl) imines of N-propyl group pyridine, the N-methyl, two (trimethyl fluoride sulfonyl) imines of N-propyl group pyridine, the N-methyl, N-butyl-pyridinium tetrafluoro boric acid, the N-methyl, N-butyl-pyridinium hexafluoro boric acid, the N-methyl, two (fluorine sulphonyl) imines of N-butyl-pyridinium, the N-methyl, two (trimethyl fluoride sulfonyl) imines of N-butyl-pyridinium, trimethyl propyl group season ammonia tetrafluoro boric acid, trimethyl propyl group season ammonia hexafluorophosphoric acid, two (fluorine sulphonyl) imines of trimethyl propyl group season ammonia, two (trimethyl fluoride sulfonyl) imines of trimethyl propyl group season ammonia, trimethyl butyl season ammonia tetrafluoro boric acid, trimethyl butyl season ammonia hexafluorophosphoric acid, two (fluorine sulphonyl) imines of trimethyl butyl season ammonia, two (trimethyl fluoride sulfonyl) imines of trimethyl butyl season ammonia, triethyl group amyl group season phosphine tetrafluoro boric acid, triethyl group amyl group season phosphine hexafluoro boric acid, two (fluorine sulphonyl) imines of triethyl group amyl group season phosphine, two (trimethyl fluoride sulfonyl) imines of triethyl group amyl group season phosphine, triethyl group hexyl season phosphine tetrafluoro boric acid, triethyl group hexyl season phosphine hexafluoro boric acid, two (fluorine sulphonyl) imines of triethyl group hexyl season phosphine, two (trimethyl fluoride sulfonyl) imines of triethyl group hexyl.
A kind of lithium ion battery that contains electrolysis additive adopts the above-mentioned high voltage electrolyte of electrolysis additive that contains as electrolyte.
As preferably, the positive electrode of this lithium ion battery uses LiNi
xCo
yMn
zO
2System, wherein x+y+z=1.
The beneficial effect that the present invention has is: the present invention is owing to having adopted the maleic anhydride or derivatives thereof as electrolysis additive; it can be decomposed to form at electrode surface the diaphragm of one deck densification; optimized the both positive and negative polarity skin covering of the surface; the surface activity that suppresses electrode; contact with the further of electrode active material thereby suppress electrolyte, reduce electrolyte main body solvent in the oxidation Decomposition of electrode surface.The cycle performance of lithium ion battery under 3～4.5V that contains this electrolysis additive improves, and alleviated the flatulence phenomenon, improved lithium ion battery safety performance, useful life and energy density.
Embodiment
In the embodiment of the present invention, the positive electrode active materials of lithium ion battery used is selected ternary material (Li Ni
0.5Co
0.2Mn
0.3O
2), negative material is selected Delanium, and every battery electrolyte use amount is 2～5g.Select the lithium ion battery of the high voltage electrolyte assembling that contains the different electrolytes additive as embodiment, select the lithium ion battery of the conventional electrolysis liquid assembling that does not contain electrolysis additive as a comparative example.
Comparative example:
In glove box (H20＜10ppm) concrete steps of preparation conventional electrolysis liquid are as follows:
(1) under nitrogen or inert gas shielding, with non-aqueous organic solvent decompression distillation purification and molecular sieve dehydration, obtain non-aqueous organic solvent;
(2) appropriate lithium salts is joined in non-aqueous organic solvent, obtain conventional electrolysis liquid 200g, be loaded on and fluoridize in bottle.
Wherein, non-aqueous organic solvent: ethylene carbonate EC: methyl ethyl carbonate EMC: dimethyl carbonate DMC=1: 1: 1 (wt%) accounts for 80%～85% of total weight; Lithium salts: concentration is 1M lithium hexafluoro phosphate (LiPF6).
Be assembled into lithium ion battery with this conventional electrolysis liquid.
Embodiment 1:
A kind of high voltage electrolyte that contains electrolysis additive adds the electrolysis additive that accounts for total weight 0.2% in the described conventional electrolysis liquid of comparative example, obtain high voltage electrolyte, is loaded on and fluoridizes in bottle; The structural formula of described electrolysis additive is as follows:
Be assembled into lithium ion battery with this high voltage electrolyte.
Embodiment 2:
A kind of high voltage electrolyte that contains electrolysis additive adds the electrolysis additive that accounts for total weight 1% in the described conventional electrolysis liquid of comparative example, obtain high voltage electrolyte, is loaded on and fluoridizes in bottle; The structural formula of described electrolysis additive is as follows:
Be assembled into lithium ion battery with this high voltage electrolyte.
Embodiment 3:
A kind of high voltage electrolyte that contains electrolysis additive adds the electrolysis additive that accounts for total weight 1.5% in the described conventional electrolysis liquid of comparative example, obtain high voltage electrolyte, is loaded on and fluoridizes in bottle; The structural formula of described electrolysis additive is as follows:
Be assembled into lithium ion battery with this high voltage electrolyte.
Embodiment 4:
A kind of high voltage electrolyte that contains electrolysis additive adds the electrolysis additive that accounts for total weight 1.5% in the described conventional electrolysis liquid of comparative example, obtain high voltage electrolyte, is loaded on and fluoridizes in bottle; The structural formula of described electrolysis additive is as follows:
Be assembled into lithium ion battery with this high voltage electrolyte.
Embodiment 5:
A kind of high voltage electrolyte that contains electrolysis additive adds the electrolysis additive that accounts for total weight 2% in the described conventional electrolysis liquid of comparative example, obtain high voltage electrolyte, is loaded on and fluoridizes in bottle; The structural formula of described electrolysis additive is as follows:
Be assembled into lithium ion battery with this high voltage electrolyte.
Embodiment 6:
A kind of high voltage electrolyte that contains electrolysis additive adds the electrolysis additive that accounts for total weight 2% in the described conventional electrolysis liquid of comparative example, obtain high voltage electrolyte, is loaded on and fluoridizes in bottle; The structural formula of described electrolysis additive is as follows:
Be assembled into lithium ion battery with this high voltage electrolyte.
Embodiment 7:
A kind of high voltage electrolyte that contains electrolysis additive adds the electrolysis additive that accounts for total weight 1% in the described conventional electrolysis liquid of comparative example, obtain high voltage electrolyte, is loaded on and fluoridizes in bottle; The structural formula of described electrolysis additive is as follows:
Be assembled into lithium ion battery with this high voltage electrolyte.
Embodiment 8:
A kind of high voltage electrolyte that contains electrolysis additive adds the electrolysis additive that accounts for total weight 2% in the described conventional electrolysis liquid of comparative example, obtain high voltage electrolyte, is loaded on and fluoridizes in bottle; The structural formula of described electrolysis additive is as follows:
Be assembled into lithium ion battery with this high voltage electrolyte.
Embodiment 9:
A kind of high voltage electrolyte that contains electrolysis additive adds the electrolysis additive that accounts for total weight 1.5% in the described conventional electrolysis liquid of comparative example, obtain high voltage electrolyte, is loaded on and fluoridizes in bottle; The structural formula of described electrolysis additive is as follows:
Be assembled into lithium ion battery with this high voltage electrolyte.
Embodiment 10:
A kind of high voltage electrolyte that contains electrolysis additive adds the electrolysis additive that accounts for total weight 2.5% in the described conventional electrolysis liquid of comparative example, obtain high voltage electrolyte, is loaded on and fluoridizes in bottle; The structural formula of described electrolysis additive is as follows:
Be assembled into lithium ion battery with this high voltage electrolyte.
With the lithium ion battery that assembles in above-described embodiment under room temperature (25 ℃), the chemical property of 3～4.5V voltage range build-in test battery, result is as shown in the table:
| Numbering | Efficient (%) first | Battery capacity conservation rate (%) (room temperature: 25 ℃) after 1C, 3～4.5V100 time circulation |
| Embodiment 1 | 85.8 | 67.7 |
| Embodiment 2 | 92.3 | 75.3 |
| Embodiment 3 | 88.0 | 72.2 |
| Embodiment 4 | 81.1 | 61.3 |
| Embodiment 5 | 89.4 | 70.1 |
| Embodiment 6 | 88.3 | 69.4 |
| Embodiment 7 | 87.8 | 68 |
| Embodiment 8 | 89 | 71.5 |
| Embodiment 9 | 86.2 | 62.7 |
| Embodiment 10 | 86.5 | 64.9 |
| Comparative example | 90.1 | 55.6 |
As can be seen from the results, add the used for electrolyte of maleic anhydride or derivatives thereof can improve its cycle performance under high voltage in lithium ion battery in electrolyte, in the high-voltage battery system, reasonable application prospect is arranged.
Be more than illustrating of preferred embodiment of the present invention, but the present invention is not limited to described embodiment, some modification or replacement compound all are included in the application's claim limited range.In addition, the present invention has used some specific term, but these terms do not consist of any restriction to the present invention just for convenience of description.
Claims (9)
1. electrolysis additive, it is characterized in that: described electrolysis additive is maleic anhydride C
4H
2O
3Perhaps a kind of in its derivative, its structure is as follows:
Wherein R1, R2 are any one in following situation:
Carbon number is 1～6 straight chained alkyl;
The carbon number that part hydrogen or whole hydrogen are replaced by halogen is 1～6 straight chained alkyl;
The alkyl that contains the ternary carbocyclic ring;
The alkyl that contains the ternary carbocyclic ring that part hydrogen or whole hydrogen are replaced by halogen;
Contain the quaternary carbocyclic ring alkyl;
The alkyl or phenyl that contains the quaternary carbocyclic ring that part hydrogen or whole hydrogen are replaced by halogen;
Phenyl, benzyl or cyano group that part hydrogen or whole hydrogen are replaced by halogen.
2. high voltage electrolyte that contains electrolysis additive, high voltage refers to it is characterized in that at 3～4.5V: add electrolysis additive claimed in claim 1 to make high voltage electrolyte in conventional electrolysis liquid; Conventional electrolysis liquid comprises non-aqueous organic solvent and lithium salts; The content of non-aqueous organic solvent is 80%～85% of gross weight, and the electrolysis additive quality is 0.01%～10% of gross weight.
3. a kind of high voltage electrolyte that contains electrolysis additive according to claim 2, it is characterized in that: described electrolysis additive content is 0.2%～5% of gross weight.
4. a kind of high voltage electrolyte that contains electrolysis additive according to claim 2 is characterized in that: described lithium salts is any one or several mixture wherein in lithium hexafluoro phosphate, hexafluoroarsenate lithium, lithium perchlorate, LiBF4, dioxalic acid lithium borate, difluorine oxalic acid boracic acid lithium, pyrovinic acid lithium, trifluoromethyl sulfonic acid lithium, bis trifluoromethyl sulfimide lithium; The concentration of lithium salts is 0.5M～1.5M.
5. a kind of high voltage electrolyte that contains electrolysis additive according to claim 2, it is characterized in that: the concentration of described lithium salts is the lithium hexafluoro phosphate of 1M.
6. a kind of high voltage electrolyte that contains electrolysis additive according to claim 2 is characterized in that: described non-aqueous organic solvent be organic solvent under nitrogen or inert gas shielding, make through decompression distillation purification and molecular sieve dehydration, described non-aqueous organic solvent is ethylene carbonate, propene carbonate, butylene, gamma-butyrolacton, dipropyl carbonate, the N-methyl pyrrolidone, the N-methylacetamide, the N-methylformamide, dimethyl formamide, diethylformamide, acetonitrile, succinonitrile, adiponitrile, glutaronitrile, methyl-sulfoxide, dimethyl sulfite, vinylene carbonate, methyl propyl carbonate, 1, the 3-dioxolanes, 1, the 2-diethoxyethane, 1, the 2-dimethoxy-ethane, 1, the 2-dibutoxy, oxolane, the 2-methyltetrahydrofuran, expoxy propane, ethyl acetate, methyl acetate, methyl butyrate, ethyl butyrate, methyl propionate, ethyl propionate, dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate, the mixture of any one or several compositions in propyl acetate and ionic liquid at room temperature.
7. a kind of high voltage electrolyte that contains electrolysis additive according to claim 6, is characterized in that: the room temperature fuse salt that described ionic liquid at room temperature is comprised of cation and anion, cation comprises alkyl imidazolium cation, piperidines cation, pyroles cation, pyridines cation, season Ammonia cation, season phosphine cationoid, anion comprises tetrafluoroborate anion, hexafluoro-phosphate radical anion, two (fluorine sulphonyl) imines anion, two (perfluoroalkyl sulphonyl) imines anion, described ionic liquid at room temperature specifically comprises: 1-ethyl, 3-methylimidazole tetrafluoro boric acid, the 1-ethyl, 3-methylimidazole hexafluorophosphoric acid, the 1-ethyl, two (fluorine sulphonyl) imines of 3-methylimidazole, the 1-ethyl, 3-methylimidazole two (the yellow acyl of trifluoromethyl) imines, the 1-propyl group, 3-methylimidazole tetrafluoro boric acid, the 1-propyl group, 3-methylimidazole hexafluorophosphoric acid, the 1-propyl group, two (fluorine sulphonyl) imines of 3-methylimidazole, the 1-propyl group, two (trimethyl fluoride sulfonyl) imines of 3-methylimidazole, the 1-butyl, 3-methylimidazole tetrafluoro boric acid, the 1-butyl, 3-methylimidazole hexafluorophosphoric acid, the 1-butyl, two (fluorine sulphonyl) imines of 3-methylimidazole, the 1-butyl, two (trimethyl fluoride sulfonyl) imines of 3-methylimidazole, the N-methyl, N-propyl group piperidines tetrafluoro boric acid, the N-methyl, N-propyl group piperidines hexafluorophosphoric acid, the N-methyl, two (fluorine sulphonyl) imines of N-propyl group piperidines, the N-methyl, two (trimethyl fluoride sulfonyl) imines of N-propyl group piperidines, the N-methyl, N-butyl piperidine tetrafluoro boric acid, the N-methyl, N-butyl piperidine hexafluorophosphoric acid, the N-methyl, two (fluorine sulphonyl) imines of N-butyl piperidine, the N-methyl, two (trimethyl fluoride sulfonyl) imines of N-butyl piperidine, the N-methyl, N-propyl pyrrole tetrafluoro boric acid, the N-methyl, N-propyl pyrrole hexafluoro boric acid, the N-methyl, two (fluorine sulphonyl) imines of N-propyl pyrrole, the N-methyl, two (trifluoro sulphonyl) imines of N-propyl pyrrole, the N-methyl, N-butyl pyrroles tetrafluoro boric acid, the N-methyl, N-butyl pyrroles hexafluorophosphoric acid, the N-methyl, two (fluorine sulphonyl) imines of N-butyl pyrroles, the N-methyl, two (trimethyl fluoride sulfonyl) imines of N-butyl pyrroles, the N-methyl, N-propyl group pyridinium tetrafluoroborate, the N-methyl, N-propyl group pyridine hexafluorophosphoric acid, the N-methyl, two (fluorine sulphonyl) imines of N-propyl group pyridine, the N-methyl, two (trimethyl fluoride sulfonyl) imines of N-propyl group pyridine, the N-methyl, N-butyl-pyridinium tetrafluoro boric acid, the N-methyl, N-butyl-pyridinium hexafluoro boric acid, the N-methyl, two (fluorine sulphonyl) imines of N-butyl-pyridinium, the N-methyl, two (trimethyl fluoride sulfonyl) imines of N-butyl-pyridinium, trimethyl propyl group season ammonia tetrafluoro boric acid, trimethyl propyl group season ammonia hexafluorophosphoric acid, two (fluorine sulphonyl) imines of trimethyl propyl group season ammonia, two (trimethyl fluoride sulfonyl) imines of trimethyl propyl group season ammonia, trimethyl butyl season ammonia tetrafluoro boric acid, trimethyl butyl season ammonia hexafluorophosphoric acid, two (fluorine sulphonyl) imines of trimethyl butyl season ammonia, two (trimethyl fluoride sulfonyl) imines of trimethyl butyl season ammonia, triethyl group amyl group season phosphine tetrafluoro boric acid, triethyl group amyl group season phosphine hexafluoro boric acid, two (fluorine sulphonyl) imines of triethyl group amyl group season phosphine, two (trimethyl fluoride sulfonyl) imines of triethyl group amyl group season phosphine, triethyl group hexyl season phosphine tetrafluoro boric acid, triethyl group hexyl season phosphine hexafluoro boric acid, two (fluorine sulphonyl) imines of triethyl group hexyl season phosphine, two (trimethyl fluoride sulfonyl) imines of triethyl group hexyl.
8. lithium ion battery that contains electrolysis additive is characterized in that: adopt in claim 2 to 7 the described high voltage electrolyte of electrolysis additive that contains of arbitrary claim as electrolyte.
9. a kind of lithium ion battery that contains electrolysis additive according to claim 8, is characterized in that: the positive electrode use LiNi of this lithium ion battery
xCo
yMn
zO
2System, wherein x+y+z=1.
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| CN111740166B (en) * | 2020-07-06 | 2023-03-24 | 香河昆仑新能源材料股份有限公司 | Electrolyte containing bis (trifluorophosphoalkyl) imide salt and lithium ion battery |
| CN112216868A (en) * | 2020-09-30 | 2021-01-12 | 香河昆仑化学制品有限公司 | Non-aqueous electrolyte and non-aqueous electrolyte battery using same |
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