CN104377384A - NCA cathode lithium ion secondary battery electrolyte and battery thereof - Google Patents

NCA cathode lithium ion secondary battery electrolyte and battery thereof Download PDF

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Publication number
CN104377384A
CN104377384A CN201410452050.3A CN201410452050A CN104377384A CN 104377384 A CN104377384 A CN 104377384A CN 201410452050 A CN201410452050 A CN 201410452050A CN 104377384 A CN104377384 A CN 104377384A
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China
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carbonate
lithium
ion secondary
secondary battery
electrolyte
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CN201410452050.3A
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Chinese (zh)
Inventor
胡念
王阿忠
赖彩娥
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Xiamen Shou Neng Science And Technology Ltd
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Xiamen Shou Neng Science And Technology Ltd
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Priority to CN201410452050.3A priority Critical patent/CN104377384A/en
Publication of CN104377384A publication Critical patent/CN104377384A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0566—Liquid materials
    • H01M10/0569—Liquid materials characterised by the solvents
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2300/00—Electrolytes
    • H01M2300/0017—Non-aqueous electrolytes
    • H01M2300/0025—Organic electrolyte
    • H01M2300/0028—Organic electrolyte characterised by the solvent
    • H01M2300/0037—Mixture of solvents
    • H01M2300/0042—Four or more solvents
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

The present invention discloses a NCA cathode lithium ion secondary battery electrolyte, which comprises a non-aqueous solvent and a lithium salt dissolved in the non-aqueous solvent, and further comprises trifluoroethyl methyl carbonate (FEMC) and vinylene carbonate (VC), wherein the trifluoroethyl methyl carbonate can capture the dissolved nickel ions so as to form the stable F-Ni bond while the oxidation product of the trifluoroethyl methyl carbonate can form the dense and stable passive film covered on the surface of the NCA so as to inhibit the oxidation of the NCA material on the electrolyte, and the vinylene carbonate is added to form the stable SEI film on the anode so as to avoid the generation of the continuous reduction reaction of the electrolyte at the anode. Compared with the electrolyte in the prior art, the electrolyte of the present invention has the following characteristics that: the trifluoroethyl methyl carbonate having the excellent high temperature cycle performance is added while the vinylene carbonate is added, such that the NCA cathode lithium ion battery can have the good high-low temperature cycle performance and the high temperature storage performance. In addition, the present invention further discloses a NCA cathode lithium ion secondary battery containing the electrolyte.

Description

A kind of NCA negative electrode electrolyte of lithium-ion secondary battery and battery thereof
Technical field
The present invention relates to a kind of lithium rechargeable battery, especially improve lithium rechargeable battery and the electrolyte thereof of cycle performance of battery.
Background technology
Lithium ion battery is the green high-capacity environment-protecting battery occurred the nineties in 20th century, there is due to it advantages such as voltage is high, volume is little, quality is light, specific energy is high, memory-less effect, pollution-free, self discharge is little, the life-span is long, emphasize the application of compact, multi-functional portable type electronic product is popularized rapidly at mobile phone, notebook computer, video camera, digital camera etc.
Current commercial lithium ion battery adopts cobalt acid lithium and graphite system mostly, this system has been difficult to make a breakthrough, in general, total specific capacity of lithium ion battery has other components of the specific capacity of positive electrode, the specific capacity of negative material and battery to decide, wherein the specific capacity of positive and negative pole material improves the key of the total specific capacity of lithium ion battery, therefore, the exploitation of the lithium ion battery electrode material of Novel high-specific capacity flexible has urgency.NCA ternary cathode material has the high feature of theoretical specific capacity, and volume energy density is compared NCM ternary cathode material and exceeded 50%, not only at consumer electronics, also has broad application prospects in dynamic battery box energy-storage battery field.But nickel metal ion has extremely strong oxidizability in NCA ternary material, be soluble in electrolyte, cause the structural change of NCA ternary material, release oxygen, reduce the cycle performance of NCA positive pole.
Summary of the invention
For the deficiencies in the prior art, the object of the present invention is to provide a kind of NCA negative electrode electrolyte of lithium-ion secondary battery and battery thereof, by adding trifluoroethyl methyl carbonic (FEMC) and vinylene carbonate (VC), stable, fine and close passivating film is formed at NCA cathode surface, form SEI film that is stable, high-flexibility at anode surface, improve the high temperature cyclic performance of NCA negative electrode lithium rechargeable battery.。
For achieving the above object, the present invention adopts following technical scheme:
A kind of NCA negative electrode electrolyte of lithium-ion secondary battery, comprise non-aqueous organic solvent and be dissolved in the lithium salts in non-aqueous organic solvent, it is characterized in that: non-aqueous organic solvent comprises trifluoroethyl methyl carbonic (FEMC) and vinylene carbonate (VC); Shown in the structural formula following formula of described trifluoroethyl methyl carbonic:
Foregoing a kind of NCA negative electrode electrolyte of lithium-ion secondary battery, the weight percentage of described trifluoroethyl methyl carbonic in non-aqueous organic solvent is: 0.5% ~ 20%; The described weight percentage of vinylene carbonate in non-aqueous organic solvent that contain is: 0.5% ~ 10%.
Foregoing a kind of NCA negative electrode electrolyte of lithium-ion secondary battery, described non-aqueous organic solvent, containing cyclic carbonate and linear carbonate, is selected from one or more the combination in ethylene carbonate, propene carbonate, dimethyl carbonate, butyl lactone, butylene, diethyl carbonate, dipropyl carbonate, methyl ethyl carbonate, methyl propyl carbonate, ethyl propyl carbonic acid ester.
Foregoing a kind of NCA negative electrode electrolyte of lithium-ion secondary battery, described lithium salts is selected from LiN (C xf2 x+1sO 2) (C yf2 y+1sO 2), LiPF 6, LiBF 4, LiBOB, LiAsF 6, Li (CF 3sO 2) 2n, LiCF 3sO 3, LiClO 4in one or more combination, wherein, x, y are natural number; Described lithium salt is: 0.5M ~ 1.5M.
A kind of lithium rechargeable battery, it comprises positive plate, negative plate, is arranged at barrier film between adjacent positive/negative plate and electrolyte, and described electrolyte is foregoing NCA negative electrode electrolyte of lithium-ion secondary battery.
The usefulness of technique scheme is:
What the present invention adopted is that in NCA (nickel cobalt lithium aluminate) ternary material, nickel metal ion has extremely strong oxidizability, is soluble in electrolyte, causes the structural change of NCA ternary material, releases oxygen, reduces the cycle performance of NCA positive pole.Trifluoroethyl methyl carbonic can provide fluorine ion, and the metal ion caught in electrolyte forms stable F-Ni key.F-Ni key stability is apparently higher than O-Ni key, and disconnecting F-Ni key needs energy 439.7kJ/mol, far above the energy 366kJ/mol disconnecting O-Ni needs.The oxidation product of trifluoroethyl methyl carbonic can form form compact and stable passivation layer and cover NCA ternary material surface simultaneously, inhibits NCA ternary material continued oxidation to decompose electrolyte; Simultaneously at cathode additive agent vinylene carbonate, good SEI film is formed at negative pole, avoid the reduction reaction of electrolyte in negative pole continuation, by the synergy of the two, make NCA negative electrode lithium rechargeable battery have good high temperature cyclic performance and high-temperature storage performance.
Embodiment
In order to make technical problem to be solved by this invention, technical scheme and beneficial effect clearly, understand, by the following examples the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment 1
The preparation of lithium ion secondary battery positive electrode: by NCA ternary material, conductive agent SuperP, bonding agent PVDF in mass ratio 96:2.0:2.0 mix the anode paste of Li-ion secondary battery making certain viscosity, be coated in current collector aluminum foil, its coating weight is 0.0194g/cm 2, cold pressing after drying at 85 DEG C; Then after carrying out trimming, cut-parts, itemize, after itemize under vacuum 85 DEG C dry 4 hours, soldering polar ear, makes the lithium ion secondary battery positive electrode met the demands.。
The preparation of cathode pole piece of lithium ion secondary battery: by graphite and conductive agent SuperP, thickener CMC: bonding agent SBR in mass ratio 90:2.0:2.0:6.0 makes slurry, being coated on copper foil of affluxion body and drying at 85 DEG C, coating weight is 0.0089g/cm 2; After carrying out trimming, cut-parts, itemize, after itemize under vacuum 110 DEG C dry 4 hours, soldering polar ear, makes the lithium ion secondary battery negative pole met the demands.
The preparation of NCA negative electrode electrolyte of lithium-ion secondary battery: ethylene carbonate (EC), propene carbonate (PC), diethyl carbonate (DEC), trifluoroethyl methyl carbonic (FEMC) and vinylene carbonate (VC) are mixed to get electrolyte solvent according to the mass ratio of table 1, dissolve in the LiPF of 0.5mol/L in a solvent 6namely NCA negative electrode electrolyte of lithium-ion secondary battery is obtained.
The preparation of lithium rechargeable battery: it is 4.2mm that the lithium ion secondary battery positive electrode prepared according to previous process, cathode pole piece and barrier film are made into thickness through lamination process, width is 34mm, length is the lithium rechargeable battery of 82mm, vacuum bakeout 10 hours at 75 DEG C, injects foregoing NCA negative electrode electrolyte of lithium-ion secondary battery.Leave standstill after 24 hours, by the constant current charge of 0.1C (160mA) to 4.2V, then drop to 0.05C (80mA) with 4.2V constant voltage charge to electric current; Then be discharged to 3.0V with 0.1C (160mA), repeat 2 discharge and recharges, finally with 0.1C (160mA), battery is charged to 3.8V again, complete battery and make.
Embodiment 2
Method with reference to embodiment 1 prepares lithium rechargeable battery, just when preparing electrolyte of lithium-ion secondary battery, ethylene carbonate (EC), propene carbonate (PC), diethyl carbonate (DEC), trifluoroethyl methyl carbonic (FEMC) and vinylene carbonate (VC) are mixed to get electrolyte solvent according to the mass ratio of table 1, dissolve in the LiPF of 1mol/L in a solvent 6namely NCA negative electrode electrolyte of lithium-ion secondary battery is obtained.
Embodiment 3
Method with reference to embodiment 1 prepares lithium rechargeable battery, just when preparing electrolyte of lithium-ion secondary battery, ethylene carbonate (EC), propene carbonate (PC), diethyl carbonate (DEC), trifluoroethyl methyl carbonic (FEMC) and vinylene carbonate (VC) are mixed to get electrolyte solvent according to the mass ratio of table 1, dissolve in the LiPF of 1.5mol/L in a solvent 6namely NCA negative electrode electrolyte of lithium-ion secondary battery is obtained.
Embodiment 4
Method with reference to embodiment 1 prepares lithium rechargeable battery, just when preparing electrolyte of lithium-ion secondary battery, ethylene carbonate (EC), propene carbonate (PC), diethyl carbonate (DEC), trifluoroethyl methyl carbonic (FEMC) and vinylene carbonate (VC) are mixed to get electrolyte solvent according to the mass ratio of table 1, dissolve in the LiPF of 1.0mol/L in a solvent 6namely NCA negative electrode electrolyte of lithium-ion secondary battery is obtained.
Embodiment 5
Method with reference to embodiment 1 prepares lithium rechargeable battery, just when preparing electrolyte of lithium-ion secondary battery, ethylene carbonate (EC), propene carbonate (PC), diethyl carbonate (DEC), trifluoroethyl methyl carbonic (FEMC) and vinylene carbonate (VC) are mixed to get electrolyte solvent according to the mass ratio of table 1, dissolve in the LiPF of 1.2mol/L in a solvent 6namely NCA negative electrode electrolyte of lithium-ion secondary battery is obtained.
Embodiment 6
Method with reference to embodiment 1 prepares lithium rechargeable battery, just when preparing electrolyte of lithium-ion secondary battery, ethylene carbonate (EC), propene carbonate (PC), diethyl carbonate (DEC), trifluoroethyl methyl carbonic (FEMC) and vinylene carbonate (VC) are mixed to get electrolyte solvent according to the mass ratio of table 1, dissolve in the LiPF of 0.5mol/L in a solvent 6namely NCA negative electrode electrolyte of lithium-ion secondary battery is obtained.
Comparative example 1
Method with reference to embodiment 1 prepares lithium rechargeable battery, just when preparing electrolyte of lithium-ion secondary battery, as different from Example 4, does not add trifluoroethyl methyl carbonic (FEMC).
Comparative example 2
Method with reference to embodiment 1 prepares lithium rechargeable battery, just when preparing electrolyte of lithium-ion secondary battery, as different from Example 4, does not add vinylene carbonate (VC).
Comparative example 3
Method with reference to embodiment 1 prepares lithium rechargeable battery, just when preparing electrolyte of lithium-ion secondary battery, as different from Example 4, does not add trifluoroethyl methyl carbonic (FEMC) and vinylene carbonate (VC).
High temperature cyclic performance is tested
For the lithium rechargeable battery of embodiment 1 ~ 6 and comparative example 1 ~ 3, under 45 DEG C of conditions, first with the constant current of 0.7C (1120mA), 4.2V is charged to lithium rechargeable battery, be less than 0.05C (80mA) at 4.2V constant-potential charge to electric current further, then with the constant current of 0.5C (800mA), 3.0V be discharged to lithium rechargeable battery.Current discharge capacity is first time cyclic discharge capacity.Battery carries out cycle charge discharge electrical testing in a manner described, gets the discharge capacity of the 200th circulation.
Carry out par high temperature cyclic performance by the capability retention of lithium rechargeable battery, capability retention is calculated as follows, and the result of gained lists table 1 in.
Circulation volume conservation rate (%)=[discharge capacity of the discharge capacity/first time circulation of the 500th circulation] * 100%.
High-temperature storage performance is tested
For the lithium rechargeable battery of embodiment 1 ~ 6 and comparative example 1 ~ 3, carry out high-temperature storage performance test: with 0.5C constant current charge to 4.2V, then at 85 DEG C with 60 DEG C, places 6 hours and 30 days respectively, the thickness swelling of mensuration battery.
Thickness swelling=(B-A)/A × 100%, wherein, A: thickness before test; Place at B:85 DEG C at 6 hours or 60 DEG C and place the thickness acquired results after 30 days in table 1
The configuration of electrolyte
The mass percent of each component of table 1 non-aqueous organic solvent and capability retention (%)
Table 1 be depicted as lithium rechargeable battery embodiment 1 ~ 6 lithium rechargeable battery of the present invention and comparative example 1 ~ 3 lithium rechargeable battery 45 DEG C, 0.7C charging/0.5C discharges, cycle performance and the storage capacity under 60 DEG C and 85 DEG C of temperature under 3.0-4.2V condition.As can be seen from embodiment 1 ~ 6 and comparative example 1 ~ 3: adopt electrolyte of lithium-ion secondary battery of the present invention can significantly improve high temperature cyclic performance and the high-temperature storage ability of lithium rechargeable battery.And as can be seen from the comparing of every test result of the properties test result of the lithium ion battery of embodiment 1 ~ 6 and the lithium ion battery of comparative example 1 ~ 3: in order to ensure that lithium ion battery has above-described good high temperature cyclic performance and high-temperature storage performance, containing trifluoroethyl methyl carbonic (FEMC) and vinylene carbonate (VC), Neither of the two can be dispensed, and the synergy of the two just can reach above object.
This, mainly because nickel metal ion has extremely strong oxidizability in NCA ternary material, is soluble in electrolyte, causes the structural change of NCA ternary material, releases oxygen, reduces the cycle performance of NCA positive pole.Trifluoroethyl methyl carbonic can provide fluorine ion, and the metal ion caught in electrolyte forms stable F-Ni key.F-Ni key stability is apparently higher than O-Ni key, and disconnecting F-Ni key needs energy 439.7kJ/mol, far above the energy 366kJ/mol disconnecting O-Ni needs.The oxidation product of trifluoroethyl methyl carbonic can form form compact and stable passivation layer and cover NCA ternary material surface simultaneously, inhibits NCA ternary material continued oxidation to decompose electrolyte; Simultaneously at cathode additive agent vinylene carbonate, good SEI film is formed at negative pole, avoid the reduction reaction of electrolyte in negative pole continuation, by the synergy of the two, make NCA negative electrode lithium rechargeable battery have good high temperature cyclic performance and high-temperature storage performance.
Although it is pointed out that in the embodiment of this specification only with LiPF 6for example is illustrated electrolyte of lithium-ion secondary battery of the present invention, but according to other execution mode of lithium rechargeable battery of the present invention, in electrolyte, lithium salts also can be LiN (C xf2 x+1sO 2) (C yf2 y+1sO 2), LiPF 6, LiBF 4, LiBOB, LiAsF 6, Li (CF 3sO 2) 2n, LiCF 3sO 3, LiClO 4or the combination of above-mentioned lithium salts; 1M is also only be lithium salts LiPF in lithium rechargeable battery 6typical concentrations, the concentration of lithium salts can be the arbitrary value between 0.5M ~ 1.5M; In addition, non-aqueous organic solvent can be selected from one or more the combination in ethylene carbonate, propene carbonate, dimethyl carbonate, butyl lactone, butylene, diethyl carbonate, dipropyl carbonate, methyl ethyl carbonate, methyl propyl carbonate, ethyl propyl carbonic acid ester.
The announcement of book and instruction according to the above description, those skilled in the art in the invention can also change above-mentioned execution mode and revise.Therefore, the present invention is not limited to embodiment disclosed and described above, also should fall in the protection range of claim of the present invention modifications and changes more of the present invention.In addition, although employ some specific terms in this specification, these terms just for convenience of description, do not form any restriction to the present invention.

Claims (10)

1. a NCA negative electrode electrolyte of lithium-ion secondary battery, comprise non-aqueous organic solvent and be dissolved in the lithium salts in non-aqueous organic solvent, it is characterized in that: non-aqueous organic solvent comprises trifluoroethyl methyl carbonic (FEMC) and vinylene carbonate (VC); Shown in the structural formula following formula of described trifluoroethyl methyl carbonic:
2. a kind of NCA negative electrode electrolyte of lithium-ion secondary battery according to claim 1, is characterized in that: the weight percentage of described trifluoroethyl methyl carbonic in non-aqueous organic solvent is: 0.5% ~ 20%.
3. a kind of NCA negative electrode electrolyte of lithium-ion secondary battery according to claim 1 and 2, is characterized in that: the described weight percentage of vinylene carbonate in non-aqueous organic solvent that contain is: 0.5% ~ 10%.
4. a kind of NCA negative electrode electrolyte of lithium-ion secondary battery according to claim 1 and 2, it is characterized in that: described non-aqueous organic solvent, containing cyclic carbonate and linear carbonate, is selected from one or more the combination in ethylene carbonate, propene carbonate, dimethyl carbonate, butyl lactone, butylene, diethyl carbonate, dipropyl carbonate, methyl ethyl carbonate, methyl propyl carbonate, ethyl propyl carbonic acid ester.
5. a kind of NCA negative electrode electrolyte of lithium-ion secondary battery according to claim 3, it is characterized in that: described non-aqueous organic solvent, containing cyclic carbonate and linear carbonate, is selected from one or more the combination in ethylene carbonate, propene carbonate, dimethyl carbonate, butyl lactone, butylene, diethyl carbonate, dipropyl carbonate, methyl ethyl carbonate, methyl propyl carbonate, ethyl propyl carbonic acid ester.
6. a kind of NCA negative electrode electrolyte of lithium-ion secondary battery according to claim 1 and 2, is characterized in that: described lithium salts is selected from LiN (C xf2 x+1sO 2) (C yf2 y+1sO 2), LiPF 6, LiBF 4, LiBOB, LiAsF 6, Li (CF 3sO 2) 2n, LiCF 3sO 3, LiClO 4in one or more combination, wherein, x, y are natural number; Described lithium salt is: 0.5M ~ 1.5M.
7. a kind of NCA negative electrode electrolyte of lithium-ion secondary battery according to claim 3, is characterized in that: described lithium salts is selected from LiN (C xf2 x+1sO 2) (C yf2 y+1sO 2), LiPF 6, LiBF 4, LiBOB, LiAsF 6, Li (CF 3sO 2) 2n, LiCF 3sO 3, LiClO 4in one or more combination, wherein, x, y are natural number; Described lithium salt is: 0.5M ~ 1.5M.
8. a kind of NCA negative electrode electrolyte of lithium-ion secondary battery according to claim 4, is characterized in that: described lithium salts is selected from LiN (C xf2 x+1sO 2) (C yf2 y+1sO 2), LiPF 6, LiBF 4, LiBOB, LiAsF 6, Li (CF 3sO 2) 2n, LiCF 3sO 3, LiClO 4in one or more combination, wherein, x, y are natural number; Described lithium salt is: 0.5M ~ 1.5M.
9. a kind of NCA negative electrode electrolyte of lithium-ion secondary battery according to claim 5, is characterized in that: described lithium salts is selected from LiN (C xf2 x+1sO 2) (C yf2 y+1sO 2), LiPF 6, LiBF 4, LiBOB, LiAsF 6, Li (CF 3sO 2) 2n, LiCF 3sO 3, LiClO 4in one or more combination, wherein, x, y are natural number; Described lithium salt is: 0.5M ~ 1.5M.
10. a lithium rechargeable battery, it comprises positive plate, negative plate, is arranged at barrier film between adjacent positive/negative plate and electrolyte, it is characterized in that: the NCA negative electrode electrolyte of lithium-ion secondary battery of described electrolyte according to any one of claim 1 to 9.
CN201410452050.3A 2014-09-05 2014-09-05 NCA cathode lithium ion secondary battery electrolyte and battery thereof Pending CN104377384A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105119015A (en) * 2015-07-28 2015-12-02 珠海市赛纬电子材料有限公司 Electrolyte functional additive, non-aqueous lithium ion battery electrolyte containing electrolyte functional additive and lithium ion battery
CN106558728A (en) * 2015-09-30 2017-04-05 比亚迪股份有限公司 A kind of non-aqueous electrolyte for lithium ion cell and lithium ion battery

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105119015A (en) * 2015-07-28 2015-12-02 珠海市赛纬电子材料有限公司 Electrolyte functional additive, non-aqueous lithium ion battery electrolyte containing electrolyte functional additive and lithium ion battery
CN106558728A (en) * 2015-09-30 2017-04-05 比亚迪股份有限公司 A kind of non-aqueous electrolyte for lithium ion cell and lithium ion battery
CN106558728B (en) * 2015-09-30 2019-04-19 比亚迪股份有限公司 A kind of non-aqueous electrolyte for lithium ion cell and lithium ion battery

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