CN1758465A - Plus plate active material and secondary battery using the material - Google Patents

Plus plate active material and secondary battery using the material Download PDF

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Publication number
CN1758465A
CN1758465A CNA2004100833793A CN200410083379A CN1758465A CN 1758465 A CN1758465 A CN 1758465A CN A2004100833793 A CNA2004100833793 A CN A2004100833793A CN 200410083379 A CN200410083379 A CN 200410083379A CN 1758465 A CN1758465 A CN 1758465A
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secondary cell
electrode active
positive electrode
active materials
upgrading
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詹益松
李志聪
陈都
吴茂松
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Dongneng Science & Technology Co Ltd
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Dongneng Science & Technology Co Ltd
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    • 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
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    • Y02E60/10—Energy storage using batteries

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Abstract

This invention relates to a positive active material and a secondary battery using said material, in which, said battery contains a conductive electrolyte and the positive active material includes a positive active substance and a modified layer covering the surface of said substance to increase the wetness between the positive of said battery and the electrolyte to further improve the low temperature operation character and reduce the solvent of low boil, low flash and low viscosity used by it.

Description

Positive electrode active materials and the secondary cell that uses this material
Technical field
The present invention is a kind of positive electrode active materials that passes through surfaction, in order to the positive pole as a secondary cell, and must significantly improve the positive pole of this secondary cell and the wettability between electrolyte, and then promote the low-temperature characteristics and the fail safe of this secondary cell.
Background technology
The secondary power-storing device kind of general rechargeable type is numerous, main development trend is for more compact, higher energy density, and have economy concurrently, safety, environmental protection and high useful life etc. characteristic, wherein, lithium rechargeable battery is owing to have high working voltage, characteristic such as high-energy-density and light weight, suit the demand of 3C electronic product and become main flow on the market, and expansion along with the application product field, lithium rechargeable battery also begins to attempt being applied to the electric motor car (electricalvehicle of bigger electric current output, EV) and hybrid electric vehicle (hybrid electrical vehicle, HEV), especially require higher discharge power (High Power) and bigger operating temperature range in this application on the one hand, therefore, for the demand of secondary cell low-temperature operation characteristic also the time with increase day by day.
Yet, tradition lithium rechargeable battery discharging efficiency at low temperatures is very low, this is because the reduction of temperature will cause the viscosity of this secondary cell electrolyte to increase and the volume minimizing, the electrolyte and the interelectrode contact area of this secondary cell are reduced fast, thereby cause big current potential to reduce (Voltage drop), and then cause the flash-over characteristic under this secondary cell low temperature not good, general improving one's methods at present is the low-temperature ion electrical conductivity that improves this electrolyte mostly, or reduce the ionic conduction impedance of this secondary cell barrier film, though the cryogenic discharging characteristic to this secondary cell has a little improvement, but effect is still quite limited, needs further improvement badly.
In addition, secondary cell in the market is except full-bodied solvent, as ethylene carbonate (ethylene carbonates, EC) or propene carbonate (propylene carbonates, PC) etc., tend to additionally add the solvent of low-viscosity, as diethyl carbonate (Diethyl Carbonate, DEC), carbonic acid Methylethyl ester (Ethyl Methyl Carbonate, EMC), and dimethyl carbonate (DimethylCarbonate, DMC) etc., to reduce the viscosity of electrolyte, improve the transmission speed of lithium ion, reduce the impedance of this secondary cell, yet the solvent of low-viscosity often belongs to low boiling, the material of low flashing point, so combustion explosion takes place easily, the fail safe of secondary cell is caused great influence.
In fact, the electrode of this secondary cell and the wettability between electrolyte are one of principal element that influences this secondary cell capacitance, this factor is even more important in low temperature discharge, because the increase of wettability not only can increase electrolyte and interelectrode contact area, and then improve the low-temperature operation characteristic of this secondary cell, more can reduce the use of low viscosity solvent, to increase the safety in utilization of this secondary cell, the present invention promptly improves at the wettability of this anode of secondary battery and electrolyte.
Summary of the invention
Main purpose of the present invention is to provide a kind of positive electrode active materials and the secondary cell that uses this material, wherein this positive electrode active materials system is through surfaction, thereby can increase the positive pole of this secondary cell and the wettability between electrolyte, and then improve the low-temperature operation characteristic of this secondary cell.
Still a further object of the present invention is a kind of positive electrode active materials and the secondary cell that uses this material, wherein the electrolyte of this secondary cell is the low viscosity solvent of low boiling capable of reducing using, low flashing point, as DEC, EMC, DMC etc., or even do not add low viscosity solvent, to increase the fail safe of this secondary cell.
For achieving the above object, positive electrode active materials provided by the invention, positive pole as a secondary cell, and this secondary cell includes a conductive electrolyte, and this positive electrode active materials includes a positive active material, and one the upgrading layer be coated in the surface of this positive active material, to increase the wettability between this positive pole and this electrolyte.
The present invention also provides a kind of secondary cell, and it includes: the positive pole of the aforementioned positive electrode active materials of a utilization, and a negative pole, a barrier film and an electrolyte are located between this positive and negative electrode.
Thus, wettability will obtain to increase under normal temperature between this positive pole and this electrolyte and the low temperature, and then improve the low-temperature operation characteristic of this secondary cell, and the content of low-viscosity solvent that more can reduce low boiling in this electrolyte, low flashing point is to improve fail safe.
Wherein, this positive active material is a lithium transition-metal oxide, and chemical structural formula is Li xM yO z, wherein M is to one or more transition metal, 0≤x≤1.15,0.8≤y≤2.2 and 1.5≤z≤5.
This upgrading layer is selected from SiO 2, SnO 2, ITO, Al 2O 3, MgO, TiO 2, Fe 2O 3, B 2O 3, ZrO 2And Sb 2O 3Deng inorganic oxide, use the solid-state sintering of oxide material, PVD, the CVD plated film, metallo-organic compound chemical method sintering, modes such as chemistry colloidal sol pyrolysis method and hot infusion method are coated in the surface of this positive active material, and this upgrading layer thickness of one or several atomic layers (one orseveral atomic layers) only, can not influence the transmission rate of conductive ion.
Best, the material of this upgrading layer is the nanoparticle of diameter below 100nm, better below the 30nm, content is below the 5mmole, because nanoparticle is little, surface area is big, reactive high, on average and on a small quantity be distributed in easily the surface of this positive active material, and its reaction-sintered temperature can reduce, optimum treatment temperature is 600-900 ℃.
Description of drawings
In order to describe characteristics of the present invention place in detail, lift explanation of following preferred embodiment and conjunction with figs. as back:
Fig. 1 is LiCoO 2The microphoto of initial surface;
Fig. 2 is LiCoO 2Mix 0.5mmole SnO 2After microphoto;
Fig. 3 is LiCoO 2Mix 1mmole SnO 2After microphoto;
Fig. 4 is LiCoO 2Mix 5mmole SnO 2After microphoto;
Fig. 5 is LiCoO 2Mix 0.5mmole SnO 2And the microphoto after 900 ℃ of heat treatment;
Fig. 6 is LiCoO 2Mix 1mmole SnO 2And the microphoto after 900 ℃ of heat treatment;
Fig. 7 is LiCoO 2Mix 5mmole SnO 2And the microphoto after 900 ℃ of heat treatment;
Fig. 8 is different SnO 2The secondary cell low temperature discharge figure of addition;
Fig. 9 is that trace adds Al 2O 3Secondary cell low temperature discharge figure;
Figure 10 adds SnO 2Secondary cell heavy-current discharge figure;
Figure 11 does not have the SnO of interpolation 2Secondary cell heavy-current discharge figure.
Embodiment
Embodiments of the invention are to be that object is tested with a lithium rechargeable battery, and this secondary cell includes a positive pole, a negative pole, and a barrier film and an electrolyte are between this positive and negative electrode, wherein:
This positive pole mainly is made of a positive active material, and this positive active material can be selected from lithium cobalt material (LiCoO 2), lithium cobalt nickel material (LiCo xNi 1-xO 2), lithium nickel material (LiNiO 2), lithium manganese material (LiMnO 2, LiMn 2O 4), lithium, cobalt, nickel and manganese (LiCo 1-x-yNi xMn yO 2), lithium iron phosphate (LiFePO 4), vanadium oxide (V 2O 5), manganese oxide (MnO 2) or lithium titanium material (LiTi xO y) or the like.
This electrolyte includes electrolyte, a non-aqueous solvent and the some additives that an alkali metal salt is formed, and this non-aqueous solvent is based on high boundary electrostrictive coefficient, full-bodied first solvent, second solvent with lower bound electrostrictive coefficient, low-viscosity is auxilliary, in fact, also can not add this second solvent in this electrolyte.
Embodiment 1:LiCoO 2/ SnO 2The preparation of positive electrode active materials
At first, respectively with the SnO of 0.5mmole, 1mmole, 5mmole diameter 18nm 2LiCoO with 1mole 2What (its initial surface as shown in Figure 1) mixed in the ethanolic solution that is dissolved in 500mL and made is uniformly dispersed, and with this solution drying, makes SnO again 2Nanoparticle is dispersed evenly to LiCoO 2On the surface, to shown in Figure 4, heat-treat with 600,700,800,900 ℃ respectively subsequently, make SnO originally as Fig. 2 2Nanoparticle is in LiCoO 2Surface reaction generate even SnO 2The upgrading layer, to shown in Figure 7, so promptly finish the preparation of positive electrode active materials of the present invention as Fig. 5.
Secondly, get 93% LiCoO 2/ SnO 2Positive electrode active materials and assistant director of a film or play's agent KS-4 4%, gas-phase growth of carbon fibre (Vapor-Grown Carbon-Fiber, VGCF) 1%, adhesive polyvinylidene fluoride (Polyvinylene Difloride, PVdF) 4% mixes mutually, and be dissolved in N-methyl-2-pyrrolidone (N-methyl-2-pryyolidone, NMP) be in the slurry of solvent, process coating oven dry is measured this positive pole and an electrolyte (1.1M LiPF after rolling and making a positive pole 6, EC/PC 2/3) between 8 ° of contact angle average out to, be better than LiCoO without surfaction 2With 18 ° of the contact angles of this electrolyte, show that its wettability obtains obviously to improve.
Embodiment 2:LiCoO 2/ Al 2O 3The preparation of positive electrode active materials
Al with 0.15mmole diameter 18nm 2O 3LiCoO with 1mole 2Mixing is dissolved in the 500mL alcohol solvent and the back drying that is uniformly dispersed, and makes Al 2O 3Nanoparticle can be dispersed in LiCoO 2The surface on, heat-treat with 600,700,800,900 ℃ respectively again, make LiCoO 2The surface generates the Al of even coating 2O 3The upgrading layer is got 85% LiCoO subsequently 2/ Al 2O 3Positive electrode active materials is with after assistant director of a film or play's agent KS-6 10%, adhesive PVdF 5% mix, and being dissolved in NMP is in the slurry of solvent, makes a positive pole after the coating oven dry rolls, and measures this positive pole and an electrolyte (1.1MLiPF 6, EC/PC 2/3) 14 ° of LiCoO that are better than without surfaction of contact angle average out to 2With 18 ° of the contact angles of this electrolyte.
Embodiment 3:LiCoO 2/ Al 2O 3-SnO 2The preparation of positive electrode active materials
Al with 0.5mmole diameter 40nm 2O 3, 0.4mmole diameter 18nm SnO 2LiCoO with 1mole 2Mix in the alcohol solvent that is dissolved in 500mL being uniformly dispersed, with this solution drying, make Al again 2O 3-SnO 2Particle can be dispersed in anodal being LiCoO 2The surface on, heat-treat with 800 ℃ subsequently, make LiCoO 2The surface generates uniform Al 2O 3-SnO 2Film.
Get 85% LiCoO 2/ Al 2O 3-SnO 2Positive electrode active materials is with after assistant director of a film or play's agent KS-6 10%, adhesive PVdF 5% mix mutually, and being dissolved in NMP is in the slurry in the solvent, through the coating oven dry roll make positive pole after, measure itself and electrolyte (1.1M LiPF 6, EC/PC 2/3) contact angle be 13 °, be better than originally 18 °.
Embodiment 4:LiCoO 2/ MgO-SnO 2The preparation of positive electrode active materials
With the MgO of 0.05mmole diameter 20nm, the SnO of 0.045mmole diameter 18nm 2LiCoO with 1mole 2Mix in the alcohol solvent that is dissolved in 500mL being uniformly dispersed, with this solution drying, make MgO-SnO again 2Particle can be dispersed in LiCoO 2The surface on, heat-treat with 800 ℃ subsequently, make LiCoO 2Surface energy generates uniform MgO-SnO 2Film.
Then, get 85% LiCoO 2/ MgO-SnO 2After assistant director of a film or play's agent KS-6 10%, adhesive PVdF5% mixed mutually, being dissolved in NMP was in the slurry in the solvent, through the coating oven dry roll make positive pole after, measure itself and electrolyte (1.1M LiPF 6, EC/PC 2/3) contact angle be 10 °, be better than originally 18 °.
What deserves to be mentioned is that upgrading layer of the present invention removes previous embodiment SnO 2, Al 2O 3Outside inorganic oxides such as MgO and composition thereof, also can be selected from SiO 2, ITO, TiO 2, Fe 2O 3, B 2O 3, ZrO 2And Sb 2O 3Deng inorganic oxide, or the mixture of aforementioned inorganic oxide.
Embodiment 5:LiCoO 2/ SnO 2The preparation of positive electrode active materials (gel sol method)
Sn (OC with 0.03mmole 2H 5) be dissolved in 300 g the isopropyl alcohol, stir after 25 hours LiCoO with 1mole 2That mixes and make is uniformly dispersed, again with this solution with 100 ℃ of dryings, make organo-tin compound be dispersed evenly to LiCoO 2The surface, heat-treat with 800 ℃ again, make LiCoO 2The surface generate uniform SnO 2The upgrading layer.
Subsequently, get 85% LiCoO 2/ SnO 2Positive electrode active materials mixes mutually with assistant director of a film or play's agent KS-6 10%, adhesive PVdF 5%, and to be dissolved in NMP be in the slurry of solvent, through the coating oven dry roll make a positive pole after, measure this positive pole and an electrolyte (1.1M LiPF 6, EC/PC 2/3) contact angle be 10.5 °, be better than 18 ° of contact angles before the surfaction not.
In addition, upgrading layer of the present invention also can use the modes such as solid-state sintering, PVD, CVD plated film of oxide material to be coated in the positive active material surface of an anode of secondary battery except modes such as utilization metallo-organic compound chemical method sintering, chemical colloidal sol pyrolysis method and hot infusion method.
Below, with regard to positive electrode active materials provided by the present invention, the actual positive pole of making a secondary cell, the test of the line correlation of going forward side by side.
Test one: LiCoO 2/ SnO 2The battery performance test of positive electrode active materials
Respectively with interpolation 5mmole, 1mmole and 0.5mmole SnO 2LiCoO 2/ SnO 2Positive electrode active materials is made the positive pole of a serondary lithium battery, again with the surely mutually spherical carbon (MCMB) that is situated between as the negative pole of these secondary cells, the positive and negative electrode of another secondary cell then adopts the LiCoO of upgrading not respectively 2With the surely mutually spherical carbon (MCMB) that is situated between with experiment in contrast, the electrolyte of four groups of secondary cells is similarly 1.1M LiPF 6-EC/PC/DEC (=3/2/5).
Earlier four Battery packs electric current with 0.2C under room temperature condition is charged, carry out discharge test respectively at room temperature with-20 ℃ again, its operating voltage is 2.75～4.20V, its result of the test such as table one and shown in Figure 8.Experimental result shows, SnO 2Trace add that (0.5～1mmole) will help the lifting of cryogenic property, but if significantly increase SnO 2Addition (5mmole) then can reduce the low temperature capacitance of battery.
Table one
SnO 2Addition Heat treatment temperature Capacitance The low temperature capacitance Percentage
Mmole ℃ mAh mAh ％
5 900 140 98 70
1 900 134 109 81.3
0.5 900 138 103 74.6
0 - 142 85.6 60.3
Test two: LiCoO 2/ Al 2O 3The battery performance test of positive electrode active materials
With interpolation 0.9mmole Al 2O 3LiCoO 2/ Al 2O 3Positive electrode active materials is made the positive pole of a serondary lithium battery, and again with the negative pole of lithium metal as these secondary cells, the positive and negative electrode of another secondary cell then adopts the LiCoO of upgrading not respectively 2With the lithium metal with in contrast the experiment, employed electrolyte then is similarly 1.1M LiPF 6-EC/PC/DEC (=3/2/5).
Charge prior to the electric current with 0.2C under the room temperature condition, carry out discharge test respectively at room temperature with-20 ℃ again, its operating voltage is 2.75～4.20V, its result of the test such as table two and shown in Figure 9.Experimental result shows, Al 2O 3Interpolation (0.5～1mmole) helps the lifting of battery cryogenic property.
Table two
Al 2O 3Addition Heat treatment temperature Capacitance The low temperature capacitance Percentage
mmole ℃ mAh mAh ％
0.9 600 135.5 99.9 70.3
0 - 142 85.6 60.3
Test three: LiCoO 2/ SnO 2The high-rate battery discharge performance test of positive electrode active materials
At first with the SnO of 0.5mmole diameter 18nm 2The LiCoO of nanoparticle and 1mole 2Mix in the alcohol solvent that is dissolved in 500mL being uniformly dispersed, and, make SnO this solution drying 2Nanoparticle is dispersed evenly to LiCoO 2The surface, heat-treat with 600 ℃ again, make LiCoO 2The surface generates uniform SnO 2The upgrading layer is got 93% LiCoO subsequently 2/ SnO 2Positive electrode active materials is with after assistant director of a film or play's agent KS-4 5%, VGCF 1%, adhesive PVdF 5% mix, and being dissolved in NMP is in the slurry of solvent, through the coating oven dry roll make a positive pole after, cooperate a negative pole and an electrolyte (1.2M LiPF again 6, EC/PC 2/3) form a secondary cell jointly, measure its heavy-current discharge characteristic, its result as shown in figure 10, test result shows that the capacitance with the 3C discharge rate is 78% of a 0.2C discharge rate.
In addition, get LiCoO 2With assistant director of a film or play's agent KS-4 6%, after adhesive PVdF 5% mixes, be dissolved in NMP is in the slurry in the solvent, after process coating oven dry rolls, cooperate as hereinbefore negative pole and the common secondary cell of forming of electrolyte again, carrying out control experiment, its result as shown in figure 11, the capacitance of 3C discharge rate is 56% of 0.2C discharge.
Therefore, the made secondary cell of positive electrode active materials of the present invention really has preferable heavy-current discharge characteristic.
In addition, test three employed electrolyte and do not add low viscous solvent, still can emit electric energy effectively at low temperatures, show that the present invention can be under the situation of the cryogenic discharging characteristic of not sacrificing secondary cell, reduce the use of low viscosity solvent, and then improve the safety in utilization of secondary cell.
In this explanation is that previous embodiment of the present invention adopts SnO 2With Al 2O 3Be fail safe, the cost of mainly considering raw material and obtain factors such as difficulty that in fact, this upgrading layer can be selected from Mg, Ca, B, Al, Ga as the upgrading layer,, In, Tl, Si, Ge, Sn, Pb, P, As, chemical formulas such as Sb, Bi accord with M xO yInorganic oxide, or the mixture of aforesaid compound all can reach identical effect.
The shared weight percentage ranges of upgrading layer of positive electrode active materials of the present invention can be 0.001mmole to 5mmole, and experimental result shows that preferable weight percentage ranges is 0.001mmole to 1mmole.
What emphasize in addition is, aforementioned only is several preferred embodiments of the present invention, do not use to limit scope of the invention process, such as anyly have the knack of this skill personnel, not breaking away from the equalization variation of being done under spirit of the present invention and the scope and modification, all should be covered by in the claim of the present patent application.

Claims (21)

1. positive electrode active materials, as the positive pole of a secondary cell, and this secondary cell includes a conductive electrolyte, and this positive electrode active materials includes:
One positive active material; And
One upgrading layer is coated in the surface of this positive active material, to increase the wettability between this positive pole and this electrolyte.
2. according to the described positive electrode active materials of claim 1, it is characterized in that wherein this upgrading layer is uniform monatomic or polyatom layer.
3. according to the described positive electrode active materials of claim 1, it is characterized in that wherein this upgrading layer is SnO 2Metal oxide.
4. according to the described positive electrode active materials of claim 1, it is characterized in that wherein this upgrading layer is Al 2O 3Metal oxide.
5. according to the described positive electrode active materials of claim 1, it is characterized in that wherein this upgrading layer is the MgO metal oxide.
6. according to the described positive electrode active materials of claim 1, it is characterized in that wherein this upgrading layer is selected from SnO 2, Al 2O 3, the MgO mixture that wherein metal oxide is formed more than two kinds.
7. according to the described positive electrode active materials of claim 1, it is characterized in that, wherein this upgrading layer is selected from the inorganic oxide of Ca, B, Ga, In, Tl, Si, Ge, Pb, P, As, Sb, Bi element, and mixes the mixture that forms more than two kinds by the inorganic oxide of aforementioned elements.
8. according to each described positive electrode active materials in the claim 3 to 7, it is characterized in that wherein this upgrading layer adopts the following nanoparticle of diameter 100nm, heat treatment temperature is 600～900 ℃.
9. according to the described positive electrode active materials of claim 1, it is characterized in that wherein this upgrading stratum proportion scope is 0.001mmole to 5mmole.
10. according to the described positive electrode active materials of claim 1, it is characterized in that wherein this upgrading stratum proportion scope is 0.001mmole to 1mmole.
11., it is characterized in that wherein this positive active material is a lithium transition-metal oxide according to the described positive electrode active materials of claim 1, chemical structural formula is Li xM yO z, wherein M is one or more transition metal, 0≤x≤1.15,0.8≤y≤2.2 and 1.5≤z≤5.
12. a secondary cell, it includes a positive pole, a negative pole, and a barrier film and an electrolyte are located between this positive and negative electrode, it is characterized in that:
This positive pole includes a positive active material, and a upgrading layer that is coated in this positive active material surface, to increase the wettability between this positive pole and this electrolyte.
13., it is characterized in that wherein this upgrading layer is uniform monatomic or polyatom layer according to the described secondary cell of claim 12.
14. according to the described secondary cell of claim 12, it is characterized in that, wherein these upgrading series of strata SnO 2Metal oxide.
15., it is characterized in that wherein this upgrading layer is Al according to the described secondary cell of claim 12 2O 3Metal oxide.
16., it is characterized in that wherein this upgrading layer is the MgO metal oxide according to the described secondary cell of claim 12.
17., it is characterized in that wherein this upgrading layer is selected from SnO according to the described secondary cell of claim 12 2, Al 2O 3, the MgO mixture that wherein metal oxide is formed more than two kinds.
18. according to the described secondary cell of claim 12, it is characterized in that, wherein this upgrading layer is selected from the inorganic oxide of Ca, B, Ga, In, Tl, Si, Ge, Pb, P, As, Sb, Bi element, and mixes the mixture that forms more than two kinds by the inorganic oxide of aforementioned elements.
19., it is characterized in that wherein this upgrading layer adopts the following nanoparticle of diameter 100nm according to each described positive electrode active materials in the claim 14 to 18, heat treatment temperature is 600～900 ℃.
20., it is characterized in that wherein this upgrading stratum proportion scope is 0.001mmole to 5mmole according to the described secondary cell of claim 12.
21., it is characterized in that wherein this upgrading stratum proportion scope is 0.001mmole to 1mmole according to the described secondary cell of claim 12.
CNA2004100833793A 2004-10-08 2004-10-08 Plus plate active material and secondary battery using the material Pending CN1758465A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015010255A1 (en) * 2013-07-23 2015-01-29 Robert Bosch Gmbh Coated lithium-rich layered oxides and preparation thereof
CN109524649A (en) * 2018-11-12 2019-03-26 北京中科海钠科技有限责任公司 A kind of sodium-ion battery positive material of clad structure and its preparation method and application
JP2020107609A (en) * 2014-10-02 2020-07-09 エルジー・ケム・リミテッド Positive active material for lithium secondary battery, manufacturing method thereof, and lithium secondary battery including the same
JP7437641B2 (en) 2019-01-30 2024-02-26 パナソニックＩｐマネジメント株式会社 Positive electrode active material for non-aqueous electrolyte secondary batteries and non-aqueous electrolyte secondary batteries

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015010255A1 (en) * 2013-07-23 2015-01-29 Robert Bosch Gmbh Coated lithium-rich layered oxides and preparation thereof
JP2020107609A (en) * 2014-10-02 2020-07-09 エルジー・ケム・リミテッド Positive active material for lithium secondary battery, manufacturing method thereof, and lithium secondary battery including the same
JP7150381B2 (en) 2014-10-02 2022-10-11 エルジー エナジー ソリューション リミテッド Positive electrode active material for lithium secondary battery, method for producing the same, and lithium secondary battery including the same
CN109524649A (en) * 2018-11-12 2019-03-26 北京中科海钠科技有限责任公司 A kind of sodium-ion battery positive material of clad structure and its preparation method and application
CN109524649B (en) * 2018-11-12 2022-04-26 北京中科海钠科技有限责任公司 Sodium-ion battery positive electrode material with coating structure and preparation method and application thereof
JP7437641B2 (en) 2019-01-30 2024-02-26 パナソニックＩｐマネジメント株式会社 Positive electrode active material for non-aqueous electrolyte secondary batteries and non-aqueous electrolyte secondary batteries

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