CN105449269B - A kind of lithium ion battery - Google Patents
A kind of lithium ion battery Download PDFInfo
- Publication number
- CN105449269B CN105449269B CN201610015479.5A CN201610015479A CN105449269B CN 105449269 B CN105449269 B CN 105449269B CN 201610015479 A CN201610015479 A CN 201610015479A CN 105449269 B CN105449269 B CN 105449269B
- Authority
- CN
- China
- Prior art keywords
- ion battery
- lithium ion
- lithium
- negative electrode
- anode sizing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 42
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 31
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 26
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000006258 conductive agent Substances 0.000 claims abstract description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000004513 sizing Methods 0.000 claims abstract description 22
- 229910052493 LiFePO4 Inorganic materials 0.000 claims abstract description 20
- AWKHTBXFNVGFRX-UHFFFAOYSA-K iron(2+);manganese(2+);phosphate Chemical compound [Mn+2].[Fe+2].[O-]P([O-])([O-])=O AWKHTBXFNVGFRX-UHFFFAOYSA-K 0.000 claims abstract description 18
- 239000002041 carbon nanotube Substances 0.000 claims abstract description 12
- 229910021393 carbon nanotube Inorganic materials 0.000 claims abstract description 11
- 239000003792 electrolyte Substances 0.000 claims abstract description 10
- 239000007774 positive electrode material Substances 0.000 claims abstract description 10
- 229910013421 LiNixCoyMn1-x-yO2 Inorganic materials 0.000 claims abstract description 4
- 229910013427 LiNixCoyMn1−x−yO2 Inorganic materials 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims description 11
- -1 polytetrafluoroethylene Polymers 0.000 claims description 11
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 10
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 10
- 239000011230 binding agent Substances 0.000 claims description 9
- 239000002270 dispersing agent Substances 0.000 claims description 9
- 239000007773 negative electrode material Substances 0.000 claims description 9
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 claims description 7
- 239000002033 PVDF binder Substances 0.000 claims description 6
- 229910021383 artificial graphite Inorganic materials 0.000 claims description 6
- 239000011883 electrode binding agent Substances 0.000 claims description 6
- 239000011267 electrode slurry Substances 0.000 claims description 6
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 6
- 239000005955 Ferric phosphate Substances 0.000 claims description 5
- 229940032958 ferric phosphate Drugs 0.000 claims description 5
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 claims description 5
- 229910000399 iron(III) phosphate Inorganic materials 0.000 claims description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 4
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 claims description 3
- 239000006230 acetylene black Substances 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 3
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 3
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- 229910000616 Ferromanganese Inorganic materials 0.000 claims description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 239000003013 cathode binding agent Substances 0.000 claims 1
- 239000004698 Polyethylene Substances 0.000 description 7
- 239000002131 composite material Substances 0.000 description 7
- QSNQXZYQEIKDPU-UHFFFAOYSA-N [Li].[Fe] Chemical compound [Li].[Fe] QSNQXZYQEIKDPU-UHFFFAOYSA-N 0.000 description 5
- DVATZODUVBMYHN-UHFFFAOYSA-K lithium;iron(2+);manganese(2+);phosphate Chemical compound [Li+].[Mn+2].[Fe+2].[O-]P([O-])([O-])=O DVATZODUVBMYHN-UHFFFAOYSA-K 0.000 description 5
- 229920000573 polyethylene Polymers 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000007772 electrode material Substances 0.000 description 4
- 239000006245 Carbon black Super-P Substances 0.000 description 3
- 229910012748 LiNi0.5Mn0.3Co0.2O2 Inorganic materials 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- 239000007767 bonding agent Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 2
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 2
- CPSYWNLKRDURMG-UHFFFAOYSA-L hydron;manganese(2+);phosphate Chemical compound [Mn+2].OP([O-])([O-])=O CPSYWNLKRDURMG-UHFFFAOYSA-L 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000011076 safety test Methods 0.000 description 2
- 229910010707 LiFePO 4 Inorganic materials 0.000 description 1
- 229910001290 LiPF6 Inorganic materials 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910001540 lithium hexafluoroarsenate(V) Inorganic materials 0.000 description 1
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 description 1
- 229910001486 lithium perchlorate Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- PQIOSYKVBBWRRI-UHFFFAOYSA-N methylphosphonyl difluoride Chemical group CP(F)(F)=O PQIOSYKVBBWRRI-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010450 olivine Substances 0.000 description 1
- 229910052609 olivine Inorganic materials 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- 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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/364—Composites as mixtures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Composite Materials (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The present invention is suitable for field of lithium ion battery, provide a kind of lithium ion battery, including a positive plate, a negative plate, a diaphragm and electrolyte, the positive plate surface is coated with anode sizing agent, the anode sizing agent includes positive active material, and the positive active material includes LiFePO4, ternary material and iron manganese phosphate for lithium；The general formula of the ternary material is LiNixCoyMn1‑x‑yO2, wherein 0<x<1,0<y<1,0<x+y<1.The mass ratio of the LiFePO4, ternary material and iron manganese phosphate for lithium is：10~60:10~50:10~50.The anode sizing agent further includes conductive agent, and the conductive agent is carbon nanotube.Cycle performance, energy density and the security performance of lithium ion battery prepared by the present invention are significantly increased.
Description
Technical field
The invention belongs to field of lithium ion battery, and in particular to a kind of lithium ion battery.
Background technology
With the continuous consumption and exhaustion increasingly of the conventional fossil fuel energy, new replacement is all strongly being found in countries in the world
The energy, lithium ion battery because having many advantages, such as to have extended cycle life, energy density height, memory-less effect, it is environmentally protective due to become
Research hotspot.In recent years, the promotion and support with countries in the world to New Energy Industry, new-energy automobile have welcome fast development
Period, and lithium ion battery becomes the important energy source supply of new energy battery.
Currently, the lithium ion battery applied to new-energy automobile field mainly has ferric phosphate lithium cell, ternary battery and phosphorus
Sour ferromanganese lithium battery.LiFePO4 is olivine structural, the electrode material stable structure in charge and discharge process, has excellent follow
Ring performance and security performance.But LiFePO4 tap density and compacted density are relatively low, discharge voltage plateau is low (about
3.2V) so that ferric phosphate lithium cell energy density is relatively low, and 32650 type ferric phosphate lithium cell highest energy density of cylinder is about at present
For 120Wh/Kg, this is difficult to meet the new-energy automobile requirement more and more harsh to course continuation mileage.Ternary battery applications are in new energy
Advantage on the automobile of source is that energy density is high (>=150Wh/Kg), but its security performance is poor, it is difficult to by lancing test, need
Fairly perfect battery management system is wanted to be controlled.The advantage of iron manganese phosphate lithium battery is that safety is good, operating voltage
Height, but the high rate performance of iron manganese phosphate for lithium and cycle performance are poor.Therefore, still lack in the art a kind of while there is Gao An
The lithium ion battery of full performance, long circulating performance and high-energy density.
Invention content
Technical problem to be solved by the present invention lies in the security performance, cycle performance and the energy that improve lithium ion battery simultaneously
Metric density, it is intended to meet requirement of the new-energy automobile to cycle performance of lithium ion battery, security performance and energy density.
In order to solve the above technical problems, the present invention provides a kind of lithium ion battery, including a positive plate, a negative plate,
One diaphragm and electrolyte, the positive plate surface are coated with anode sizing agent, and the anode sizing agent includes positive active material, described
Positive active material includes LiFePO4, ternary material and iron manganese phosphate for lithium；The general formula of the ternary material is
LiNixCoyMn1-x-yO2, wherein 0<x<1,0<y<1,0<x+y<1.
Further, the mass ratio of the LiFePO4, ternary material and iron manganese phosphate for lithium is：10~60:10~50:10
~50.
Further, the anode sizing agent further includes conductive agent, and the conductive agent is carbon nanotube.
Further, the mass percent that the carbon nanotube accounts for anode sizing agent is 1%~5%.
Further, the anode sizing agent further includes binder, and the binder is polyvinylidene fluoride or polytetrafluoroethyl-ne
Alkene.
Further, the mass percent that the binder accounts for anode sizing agent is 1%~5%.
Further, the negative plate surface is coated with negative electrode slurry, and the negative electrode slurry includes negative electrode active material, bears
Pole conductive agent, cathode dispersant and negative electrode binder；The negative electrode active material, cathode conductive agent, cathode dispersant and cathode
The mass ratio of binder is：85-95:2-5:1-3:2-5.
Further, the negative electrode active material is at least one of graphitic carbon, graphene, silicon-carbon and artificial graphite.
Further, the cathode dispersant is carboxymethyl cellulose.
Further, the cathode conductive agent is acetylene black；The negative electrode binder is polyvinyl alcohol and polytetrafluoroethylene (PTFE)
At least one of.
Compared with prior art, the present invention advantageous effect is：In the anode sizing agent of the lithium ion battery of the present invention just
Pole active material using LiFePO4, three kinds of materials of ternary material and iron manganese phosphate for lithium it is compound, make full use of LiFePO4
High security, the high-energy density of ternary material and the high voltage platform of iron manganese phosphate for lithium, while three kinds of bills of materials can be overcome
Existing deficiency, significantly improves the cycle performance and energy density of battery when solely utilizing.When the three-phase composite, short grained iron
Lithium material can be wrapped in ternary material particle surface, and the relatively small ternary material particle of grain size also can be filled in iron manganese phosphate
In the hollow structure of lithium, when the safety tests such as short circuit, needle thorn occur for battery, short dot acts on and iron manganese phosphate for lithium and phosphorus first
On sour iron lithium particle, the high security of LiFePO4 and iron manganese phosphate for lithium can be made full use of, short-circuit resistance is larger, to short-circuit electricity
Stream plays the role of buffering and abated effect, to play the security performance that safeguard protection significantly improves lithium ion battery.By this
Lithium ion battery prepared by invention realizes requirement of the industry development to the cycle performance of battery, energy density and security performance.
Description of the drawings
Fig. 1 is cyclic curve figure of the three kinds of batteries of the offer of the embodiment of the present invention 1,2,3 in 2.75V-4.2V, 3C.
Fig. 2 is discharge curve of the three kinds of batteries of the offer of the embodiment of the present invention 1,2,3 at 1C, -20 DEG C.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Technical solution according to the invention prepares lithium ion battery：
A kind of lithium ion battery, including a positive plate, a negative plate, a diaphragm and electrolyte, the positive plate surface apply
It is covered with anode sizing agent, the anode sizing agent includes positive active material, and the positive active material includes LiFePO4, ternary material
Material and iron manganese phosphate for lithium；The general formula of the ternary material is LiNixCoyMn1-x-yO2, wherein 0<x<1,0<y<1,0<x+y<1.Institute
The mass ratio for stating LiFePO4, ternary material and iron manganese phosphate for lithium is：10~60:10~50:10~50.
Specifically, the anode sizing agent further includes conductive agent, and the conductive agent is carbon nanotube；The carbon nanotube accounts for just
The mass percent of pole slurry is 1%~5%.The anode sizing agent further includes binder, and the binder is to gather inclined difluoro second
Alkene or polytetrafluoroethylene (PTFE)；The mass percent that the binder accounts for anode sizing agent is 1%~5%.
Specifically, the negative plate surface is coated with negative electrode slurry, and the negative electrode slurry includes negative electrode active material, cathode
Conductive agent, cathode dispersant and negative electrode binder；The negative electrode active material, cathode conductive agent, cathode dispersant and cathode are viscous
Knot agent mass ratio be：85-95:2-5:1-3:2-5.
Specifically, the negative electrode active material is at least one of graphitic carbon, graphene, silicon-carbon and artificial graphite.Institute
It is carboxymethyl cellulose to state cathode dispersant.The cathode conductive agent is acetylene black；The negative electrode binder be polyvinyl alcohol and
At least one of polytetrafluoroethylene (PTFE).
Specifically, the diaphragm is PP (polypropylene) and/or PE (polyethylene), in the surfaces PP and/or PE coating inorganic
Close object or organic compound, polyethylene double-surface ceramics diaphragm；The inorganic compound includes Al2O3, SiO2, the organic matter is
PVDF (Kynoar).
Specifically, the electrolyte includes electrolyte and organic solvent；The electrolyte includes LiPF6、LiClO4、
LiAsF6At least one of, the solvent includes EC (ethylene carbonate), DMC (dimethyl carbonate), DEC (diethyl carbonate)
At least one of.
Lithium ion battery prepared by the present invention, mainly adjusts positive active material.Iron manganese phosphate for lithium voltage
Platform is 3.9-4.1V, and ternary material voltage platform is 3.4-3.6V, and LiFePO4 voltage platform is 3.1-3.2V.In 2.5-
In 4.2V charging/discharging voltages section, wherein discharge and recharge reaction within the scope of 2.5-3.4V mainly by LiFePO 4 material undertake into
It goes, the discharge and recharge reaction within the scope of 3.4-3.9V mainly undertakes progress, the charge and discharge in 3.9-4.2V voltage ranges by ternary material
Electricity reaction mainly undertakes progress by iron manganese phosphate lithium material.Therefore of the invention compared to single_phase system and two-phase composites
The three-phase system voltage that each material is born within the scope of the voltage range of setting is relatively narrow, therefore the energy of three-phase system battery
Density gets a promotion, while cycle performance also increases.
Ternary material particle is spherical, and particle is larger, and meso-position radius is 10-15 μm of (meso-position radius D50It indicates, refers to one
The cumulative particle sizes percentile of sample reaches grain size corresponding when 50%)；LiFePO4 is small-particulate materials, and meso-position radius is
1-2μm；Iron manganese phosphate for lithium is hollow sphere structure, and particle is big, and meso-position radius is 25-30 μm.When three-phase composite, short grained iron lithium
Material can be wrapped in ternary material particle surface, and the relatively small ternary material particle of grain size also can be filled in iron manganese phosphate for lithium
Hollow structure in, when the safety tests such as short circuit, needle thorn occur for battery, short dot act on and iron manganese phosphate for lithium and phosphoric acid first
On iron lithium particle, the high security of LiFePO4 and iron manganese phosphate for lithium can be made full use of, short-circuit resistance is larger, to short circuit current
Play the role of buffering and abated effect, to play safeguard protection.Therefore the lithium ion battery of the three-phase system of the present invention
Security performance is improved.
For anode sizing agent in the positive plate of the present invention using carbon nanotube as conductive agent, raising can be with the electricity of electrode material
Conductance and cryogenic property, while carbon nanotube has certain electrolyte storage function, it can further lift three-phase complex
The cycle performance of system.
The present invention is in prepared lithium ion battery, the component of diaphragm and electrolyte to a certain extent also can be to made
The correlated performance of standby lithium ion battery is influenced.Therefore present invention preferably uses the diaphragm and electrolyte.
Embodiment 1
Battery size used is 32650, capacity 5.6Ah, energy density 135Wh/Kg.Anode uses ternary material
(LiNi0.5Mn0.3Co0.2O2) and iron manganese phosphate lithium material press 50:50 mass ratio mixing, conductive agent are (conductive using Super-P
Carbon black) and KS-6 (electrically conductive graphite), bonding agent be polyvinylidene fluoride.Cathode uses artificial graphite, diaphragm double using polyethylene
Face ceramic diaphragm (12+2+2), assembled battery number is A.
Embodiment 2
The battery size that the present embodiment uses is 32650, capacity 5.7Ah, energy density 135Wh/Kg.Anode uses
LiFePO4, ternary material (LiNi0.5Mn0.3Co0.2O2) and iron manganese phosphate lithium material press 40:27:33 mass ratio mixing, leads
Electric agent uses Super-P and KS-6, and bonding agent is polyvinylidene fluoride.Cathode uses artificial graphite, diaphragm double using polyethylene
Face ceramic diaphragm (12+2+2), assembled battery number is B.
Embodiment 3
The battery size that the present embodiment uses is 32650, capacity 5.7Ah, energy density 135Wh/Kg.Anode uses
LiFePO4, ternary material (LiNi0.5Mn0.3Co0.2O2) and iron manganese phosphate lithium material press 40:27:33 ratio mixing, it is conductive
Agent uses carbon nanotube CNTs, and bonding agent is polyvinylidene fluoride.Cathode uses artificial graphite, diaphragm to use the two-sided pottery of polyethylene
Porcelain diaphragm (12+2+2), assembled battery number is C.
Testing the 3C cycle performances of battery A, B, C at 2.75V-4.2V, (3C cycles refer to battery with the 3 of its rated capacity
Times electric current carries out charge-discharge test, such as battery rated capacity is 5Ah, then carry out when 3C cycles our set constant-current charges and
Size of current when constant-current discharge is exactly 15A), the results are shown in Figure 1.Two-phase composites (ternary it can be seen from Fig. 1
Material+iron manganese phosphate for lithium, battery A) to recycle 300 weeks capacity retention ratios be 92.12% to 3C.Using three-phase composite system (ferric phosphate
Lithium+ternary material+iron manganese phosphate for lithium, battery B) 3C cycle performances are better than two-phase composites, and capacity retention ratio reaches within 300 weeks
96.49%.On this basis again use carbon nanotube as conductive agent (battery C) after, the conductivity of electrode material is improved,
Cycle performance is also promoted, and 3C, 300 weeks capacity retention ratios reach 98.51%.
The discharge performance of battery A, B, C at 1C, -20 DEG C is tested, the results are shown in Figure 2.Two it can be seen from Fig. 2
Phase compound system (ternary material+iron manganese phosphate for lithium, battery A) and three-phase composite system (LiFePO4+ternary material+manganese phosphate
Iron lithium, battery B) cryogenic property it is poor, discharge capacities of the battery A and B at -20 DEG C, 1C is about it to be held in 25 DEG C, 1C electric discharges
The 60.1% and 64.5% of amount.After doing conductive agent using carbon nanotube, the conductivity of electrode material gets a promotion, the low temperature of battery
Performance is improved, discharge capacities of the battery C at -20 DEG C, 1C be about it 25 DEG C, 1C discharge capacities 74.35%.
The security performance of battery A, B, C are tested, as a result as shown in table 1.
The security performance test result table of 1 assembled battery of table
| Battery | Initial voltage (V) | Overcharge experiment percent of pass | Short circuit experiment percent of pass | Needle thorn experiment percent of pass |
| A | 4.2 | 8/10 | 9/10 | 0/10 |
| B | 4.2 | 10/10 | 10/10 | 10/10 |
| C | 4.2 | 10/10 | 10/10 | 10/10 |
Positive active material uses LiFePO4 with ternary material and manganese phosphate it can be seen from above-mentioned Fig. 1, Fig. 2 and table 1
Iron lithium three-phase compounds assembled battery, and there is battery assembled than ternary material and iron manganese phosphate for lithium two-phase compounding preferably to follow
Ring performance and security performance；It is more preferably followed as conductive agent using Super-P and KS-6 as conductive agent ratio using carbon nanotube
Ring performance and low temperature performance.Illustrate that technical solution according to the invention is made lithium ion battery and is improving the same of security performance
When also improve the cycle performance and cryogenic property of battery.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (10)
1. a kind of lithium ion battery, including a positive plate, a negative plate, a diaphragm and electrolyte, the positive plate surface coating
There is anode sizing agent, which is characterized in that the anode sizing agent includes positive active material, and the positive active material includes ferric phosphate
Lithium, ternary material and iron manganese phosphate for lithium；The general formula of the ternary material is LiNixCoyMn1-x-yO2, wherein 0<x<1,0<y<1,0<
x+y<1；
Wherein, the ternary material particle is spherical, and meso-position radius is 10-15 μm；LiFePO4 meso-position radius is 1-2 μm；Phosphoric acid
Ferromanganese lithium is hollow sphere structure, and meso-position radius is 25-30 μm.
2. lithium ion battery as described in claim 1, which is characterized in that the LiFePO4, ternary material and iron manganese phosphate
The mass ratio of lithium is：10~60:10~50:10~50.
3. lithium ion battery as described in claim 1, which is characterized in that the anode sizing agent further includes conductive agent, described to lead
Electric agent is carbon nanotube.
4. lithium ion battery as claimed in claim 3, which is characterized in that the conductive agent accounts for the mass percent of anode sizing agent
It is 1%~5%.
5. lithium ion battery as described in claim 1, which is characterized in that the anode sizing agent further includes binder, described viscous
It is polyvinylidene fluoride or polytetrafluoroethylene (PTFE) to tie agent.
6. lithium ion battery as claimed in claim 5, which is characterized in that the binder accounts for the mass percent of anode sizing agent
It is 1%~5%.
7. lithium ion battery as described in claim 1, which is characterized in that the negative plate surface is coated with negative electrode slurry, institute
It includes negative electrode active material, cathode conductive agent, cathode dispersant and negative electrode binder to state negative electrode slurry；The negative electrode active material
Matter, cathode conductive agent, cathode dispersant and negative electrode binder mass ratio be：85-95:2-5:1-3:2-5.
8. lithium ion battery as claimed in claim 7, which is characterized in that the negative electrode active material be graphitic carbon, graphene,
At least one of silicon-carbon and artificial graphite.
9. lithium ion battery as claimed in claim 7, which is characterized in that the cathode dispersant is carboxymethyl cellulose.
10. lithium ion battery as claimed in claim 7, which is characterized in that the cathode conductive agent is acetylene black；The cathode
Binder is at least one of polyvinyl alcohol and polytetrafluoroethylene (PTFE).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610015479.5A CN105449269B (en) | 2016-01-08 | 2016-01-08 | A kind of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610015479.5A CN105449269B (en) | 2016-01-08 | 2016-01-08 | A kind of lithium ion battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105449269A CN105449269A (en) | 2016-03-30 |
| CN105449269B true CN105449269B (en) | 2018-07-24 |
Family
ID=55559222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610015479.5A Expired - Fee Related CN105449269B (en) | 2016-01-08 | 2016-01-08 | A kind of lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105449269B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109428121A (en) * | 2017-08-21 | 2019-03-05 | 江苏津谊新能源科技有限公司 | A kind of manufacturing method of high-energy-density lithium-ion-power cell |
| CN113039669A (en) * | 2018-12-05 | 2021-06-25 | 东丽株式会社 | Positive electrode for lithium ion secondary battery, electrode paste for lithium ion secondary battery, and lithium ion secondary battery |
| CN114079046B (en) * | 2020-08-14 | 2024-01-09 | 比亚迪股份有限公司 | Mixed positive electrode material, positive electrode plate, manufacturing method of positive electrode plate and battery |
| CN114447327A (en) * | 2020-10-30 | 2022-05-06 | 深圳新宙邦科技股份有限公司 | Lithium ion battery anode and lithium ion battery |
| CN114447430A (en) * | 2020-10-30 | 2022-05-06 | 深圳新宙邦科技股份有限公司 | Lithium ion battery |
| CN115132975A (en) * | 2021-03-25 | 2022-09-30 | 比亚迪股份有限公司 | Lithium ion battery and power vehicle |
| CN116031386A (en) * | 2023-01-31 | 2023-04-28 | 重庆长安新能源汽车科技有限公司 | Lithium ion battery anode material, lithium ion battery and preparation method |
| CN116259846A (en) * | 2023-04-11 | 2023-06-13 | 湖北亿纬动力有限公司 | Lithium ion battery electrolyte and lithium ion battery |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102117913A (en) * | 2009-12-31 | 2011-07-06 | 珠海光宇电池有限公司 | Power battery using mixed anode material |
| CN104300123A (en) * | 2014-03-20 | 2015-01-21 | 中航锂电（洛阳）有限公司 | Mixed positive electrode material, positive plate using the same, and lithium ion battery |
| CN104347846A (en) * | 2013-07-26 | 2015-02-11 | 浙江南博电源科技有限公司 | Preparation method for safety-improved nickel-cobalt lithium manganate positive electrode sheet |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101965016B1 (en) * | 2011-07-25 | 2019-04-02 | 에이일이삼 시스템즈, 엘엘씨 | Blended cathode materials |
| CN103066280B (en) * | 2012-12-28 | 2016-04-20 | 珠海泰坦能源电子技术有限公司 | spherical lithium iron phosphate anode material and preparation method thereof |
| CN104577118A (en) * | 2015-01-04 | 2015-04-29 | 合肥国轩高科动力能源股份公司 | Preparation method of novel core-shell structure modified cathode material |
-
2016
- 2016-01-08 CN CN201610015479.5A patent/CN105449269B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102117913A (en) * | 2009-12-31 | 2011-07-06 | 珠海光宇电池有限公司 | Power battery using mixed anode material |
| CN104347846A (en) * | 2013-07-26 | 2015-02-11 | 浙江南博电源科技有限公司 | Preparation method for safety-improved nickel-cobalt lithium manganate positive electrode sheet |
| CN104300123A (en) * | 2014-03-20 | 2015-01-21 | 中航锂电（洛阳）有限公司 | Mixed positive electrode material, positive plate using the same, and lithium ion battery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105449269A (en) | 2016-03-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105449269B (en) | A kind of lithium ion battery | |
| CN105552344B (en) | A kind of based lithium-ion battery positive plate, lithium ion battery and preparation method thereof | |
| CN107482222A (en) | Combined conductive agent, electrodes of lithium-ion batteries and lithium ion battery | |
| WO2016201940A1 (en) | Preparation method for carbon/graphite composite anode material | |
| KR101586015B1 (en) | Anode active material for lithium secondary battery, lithium secondary battery comprising the material, and method of preparing the material | |
| CN106663814B (en) | Positive electrode active materials slurry and anode prepared therefrom comprising two kinds of adhesives | |
| US20180366720A1 (en) | Positive active material and lithium-ion secondary battery | |
| CN103891030B (en) | Nonaqueous electrolytic solution secondary battery and utilization thereof | |
| US20150364766A1 (en) | Anode for lithium secondary battery, method for manufacturing same, and lithium secondary battery including same | |
| WO2016202168A1 (en) | Lithium-ion battery positive-electrode slurry and preparation method therefor | |
| CN105742695B (en) | A kind of lithium ion battery and preparation method thereof | |
| CN111799470B (en) | Positive pole piece and sodium ion battery | |
| CN107565094A (en) | Anode material for lithium-ion batteries, based lithium-ion battery positive plate and lithium ion battery | |
| CN106356536A (en) | Lithium ion battery negative electrode and preparation method thereof | |
| CN113328098A (en) | Negative plate and lithium ion battery comprising same | |
| CN114284465A (en) | Preparation method of positive electrode slurry, positive electrode plate and lithium ion battery | |
| CN113314694A (en) | High-rate lithium ion battery positive plate and preparation method thereof, and lithium ion battery | |
| CN107204421A (en) | Negative plate and lithium ion battery | |
| KR20140132791A (en) | Anode active material for lithium secondary battery and lithium secondary battery comprising the same | |
| CN110993901A (en) | Low-internal-resistance quick-charging and quick-discharging lithium ion power battery | |
| CN105990606B (en) | A kind of lithium ion battery | |
| CN116435503A (en) | Negative electrode material layer, negative electrode plate, preparation method of negative electrode plate, secondary battery, battery pack and electric equipment | |
| CN115275166A (en) | Long-life graphite composite material and preparation method thereof | |
| CN208352138U (en) | A kind of electrochemical energy storage device | |
| KR20160039483A (en) | Anode active material and lithium secondary battery comprising the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20180920 Granted publication date: 20180724 |
|
| PP01 | Preservation of patent right | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20200320 Granted publication date: 20180724 |
|
| PD01 | Discharge of preservation of patent | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20200429 Granted publication date: 20180724 |
|
| PP01 | Preservation of patent right | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20230331 Granted publication date: 20180724 |
|
| PD01 | Discharge of preservation of patent | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180724 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |