CN109921014A - Ni-based anode material for lithium-ion batteries and preparation method thereof with subgrain structure - Google Patents
Ni-based anode material for lithium-ion batteries and preparation method thereof with subgrain structure Download PDFInfo
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- CN109921014A CN109921014A CN201711329047.2A CN201711329047A CN109921014A CN 109921014 A CN109921014 A CN 109921014A CN 201711329047 A CN201711329047 A CN 201711329047A CN 109921014 A CN109921014 A CN 109921014A
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- 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 invention discloses a kind of Ni-based anode material for lithium-ion batteries and preparation method thereof with subgrain structure, chemical general formula Li(1+y)NixR(1‑x‑1/2y)O2, wherein 0.1 < x < 0.99,0.0001 < y < 0.2, R are at least one in addition to lithium, nickel, chromium in the periodic table of elements；Ni-based ternary precursor material and lithium source are carried out mixed at high speed by this method, obtain mixture；In this way, the present invention carries out mixed at high speed to Ni-based persursor material, lithium source and metal dopant using high speed blender, improve the uniformity of mixing, pass through control cooling velocity simultaneously, inhibit the ordering growth of partial crystals, promote the formation of subgrain structure, finally obtains with the active nickel-base anode material with subgrain structure of excellent electrochemical.
Description
Technical field
The invention belongs to technical field of lithium ion, and in particular to a kind of Ni-based lithium ion battery with subgrain structure
Positive electrode and preparation method thereof.
Background technique
Ni-based anode material for lithium-ion batteries is extensive due to energy density with higher and relatively low cost
Applied to IT product and new-energy automobile field.Subgrain structure is a kind of crystal structure between monocrystalline and polycrystalline, one
As crystal boundary face referred to as subgrain structure when being low-angle boundary less than 5 degree, subgrain structure with stronger chemical activity, thus,
Positive electrode with subgrain structure can show good chemical property.
In the prior art, nickel-base anode material, nickel-base anode obtained are prepared by the way of commonly cooling down after roasting
Material electrochemical performance is poor.
Summary of the invention
For overcome the deficiencies in the prior art, the purpose of the present invention be intended to provide a kind of Ni-based lithium with subgrain structure from
Sub- cell positive material and preparation method thereof.
The embodiment of the present invention provides a kind of Ni-based anode material for lithium-ion batteries with subgrain structure, and chemical general formula is
Li(1+y)NixR(1-x-1/2y)O2, wherein 0.1 < x < 0.99,0.0001 < y < 0.2, R are that lithium, nickel, chromium are removed in the periodic table of elements
Outer at least one.
Wherein, the Li(1+y)NixR(1-x-1/2y)O2For subgrain structure, the crystallite size range of the subgrain structure is 5nm-
1000nm。
The Ni-based lithium ion cell positive material led with subgrain structure that the present invention also provides a kind of as described in above scheme
The preparation method of material, method are as follows: Ni-based ternary precursor material and lithium source are subjected to mixed at high speed, obtain mixture；By institute
It states mixture to be roasted in air atmosphere, rapid cooling is carried out with the cooling velocity of 10-500 DEG C/min after the completion of roasting,
Obtain the nickel-base anode material with subgrain structure.
In above scheme, the molar ratio of the Ni-based ternary precursor material and lithium source is (1~3): 1.
In above scheme, the mixed at high speed uses ternary material high speed blender, and the speed of the mixed at high speed is 500
~5000r/min, the time of the mixed at high speed are 0.5~5h.
In above scheme, the lithium source is lithium carbonate or lithium hydroxide.
In above scheme, the material doped at least one metallic element of the Ni-based ternary precursor, the metallic element is
It is at least one in addition to lithium, nickel, chromium in the periodic table of elements.
In above scheme, the maturing temperature is 650-1100 DEG C, and the calcining time is 4~36h.
Compared with prior art, the invention proposes a kind of Ni-based anode material for lithium-ion batteries with subgrain structure and
Preparation method, chemical general formula Li(1+y)NixR(1-x-1/2y)O2, wherein 0.1 < x < 0.99,0.0001 < y < 0.2, R are element
It is at least one in addition to lithium, nickel, chromium in periodic table；Ni-based ternary precursor material and lithium source are carried out high speed and mixed by this method
It closes, obtains mixture；The mixture is roasted in air atmosphere, with the cooling of 10-500 DEG C/min after the completion of roasting
Speed carries out rapid cooling, obtains the nickel-base anode material with subgrain structure；In this way, the present invention is using high speed blender to nickel
Base persursor material, lithium source and metal dopant carry out mixed at high speed, improve the uniformity of mixing, while passing through control cooling
Speed inhibits the ordering growth of partial crystals, promotes the formation of subgrain structure, and finally obtaining has the active tool of excellent electrochemical
There is the nickel-base anode material of subgrain structure.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
The embodiment of the present invention provides a kind of Ni-based anode material for lithium-ion batteries with subgrain structure, and chemical general formula is
Li(1+y)NixR(1-x-1/2y)O2, wherein 0.1 < x < 0.99,0.0001 < y < 0.2, R are that lithium, nickel, chromium are removed in the periodic table of elements
Outer at least one.
Wherein, the Li(1+y)NixR(1-x-1/2y)O2For subgrain structure, the crystallite size range of the subgrain structure is 5nm-
1000nm。
The embodiment of the present invention is also providing a kind of Ni-based lithium ion battery with subgrain structure as described in above scheme just
The preparation method of pole material, method are as follows: Ni-based ternary precursor material and lithium source are subjected to mixed at high speed, obtain mixture；
The mixture is roasted in air atmosphere, it is rapidly cold with the cooling velocity progress of 10-500 DEG C/min after the completion of roasting
But, the nickel-base anode material with subgrain structure is obtained.
Its method specifically: Ni-based persursor material, lithium source and metal dopant are added in miniature high-speed mixer,
It mixes to uniform, acquisition mixture；It fills this blend into porcelain boat, is placed in air atmosphere or oxygen and is roasted, roast
Rapid cooling is carried out with the cooling velocity of 10-500 DEG C/min after the completion of burning, obtains the nickel-base anode material with subgrain structure.
Wherein, the molar ratio of the Ni-based ternary precursor material and lithium source is (1~3): 1.
Wherein, the mixed at high speed uses ternary material high speed blender, and the speed of the mixed at high speed is 500~
5000r/min, the time of the mixed at high speed are 0.5~5h.
Wherein, the lithium source is lithium carbonate or lithium hydroxide.
Wherein, the material doped at least one metallic element of the Ni-based ternary precursor, the metallic element are element week
It is at least one in addition to lithium, nickel, chromium in phase table.
Wherein, the maturing temperature is 650-1100 DEG C, and the calcining time is 4~36h.
The present invention carries out mixed at high speed to Ni-based persursor material, lithium source and metal dopant using high speed blender, mentions
High mixed uniformity, while by control cooling velocity, inhibit the ordering growth of partial crystals, the shape of promotion subgrain structure
At finally acquisition is with the active nickel-base anode material with subgrain structure of excellent electrochemical.
The present invention carries out mixed at high speed to Ni-based persursor material, lithium source and metal dopant using high speed blender, mentions
High mixed uniformity, while by control cooling velocity, inhibit the ordering growth of partial crystals, the shape of promotion subgrain structure
At, improve the migration velocity of lithium ion, improve the electro-chemical activity of material, finally obtain have excellent electrochemical it is active
Nickel-base anode material with subgrain structure.
Embodiment 1
A kind of Ni-based anode material for lithium-ion batteries with subgrain structure, which is characterized in that its chemical general formula is
LiNi0.5Co0.2Mn0.3O2。
The embodiment of the present invention is also providing a kind of Ni-based lithium ion battery with subgrain structure as described in above scheme just
Pole material the Ni-based ternary precursor material of 1000g and 403g lithium carbonate is added in miniature high-speed mixer, in revolving speed 2800r/
Mixed at high speed 2.8h under min obtains mixture；The mixture is fitted into porcelain boat, is roasted at 860 DEG C in air atmosphere
20h is roasted, and carries out rapid cooling after the completion of roasting with the cooling velocity of 200 DEG C/min, obtains the nickel with subgrain structure
Base anode material.
Wherein, the Ni-based ternary precursor material is Ni0.5Co0.2Mn0.3(OH)2。
Using the nickel-base anode material with subgrain structure of above-mentioned acquisition as anode, using metal lithium sheet as cathode
It assembles button cell and carries out charge-discharge test, using the nickel-base anode material produced by the present invention with subgrain structure in 2C multiplying power
Lower first discharge specific capacity reaches 169mAh/g；Identical component, technique, but without the positive electrode Jing Guo rapid cooling at 2C times
First discharge specific capacity is 157mAh/g under rate, it is seen that subgrain structure significantly improves the electro-chemical activity of material.
Embodiment 2
A kind of Ni-based anode material for lithium-ion batteries with subgrain structure, which is characterized in that its chemical general formula is
LiNi0.5Co0.2Mn0.3O2。
The embodiment of the present invention is also providing a kind of Ni-based lithium ion battery with subgrain structure as described in above scheme just
Pole material the Ni-based ternary precursor material of 1000g and 403g lithium carbonate is added in miniature high-speed mixer, in revolving speed 2800r/
Mixed at high speed 2.8h under min obtains mixture；The mixture is fitted into porcelain boat, is roasted at 860 DEG C in air atmosphere
20h is roasted, and carries out rapid cooling after the completion of roasting with the cooling velocity of 10 DEG C/min, obtains the nickel with subgrain structure
Base anode material.
Wherein, the Ni-based ternary precursor material is Ni0.5Co0.2Mn0.3(OH)2。
Using the nickel-base anode material with subgrain structure of above-mentioned acquisition as anode, using metal lithium sheet as cathode
It assembles button cell and carries out charge-discharge test, using the nickel-base anode material produced by the present invention with subgrain structure in 2C multiplying power
Lower first discharge specific capacity reaches 165mAh/g；Identical component, technique, but without the positive electrode Jing Guo rapid cooling at 2C times
First discharge specific capacity is 158mAh/g under rate, it is seen that subgrain structure significantly improves the electro-chemical activity of material.
Embodiment 3
A kind of Ni-based anode material for lithium-ion batteries with subgrain structure, which is characterized in that its chemical general formula is
LiNi0.5Co0.2Mn0.3O2。
The embodiment of the present invention is also providing a kind of Ni-based lithium ion battery with subgrain structure as described in above scheme just
Pole material the Ni-based ternary precursor material of 1000g and 403g lithium carbonate is added in miniature high-speed mixer, in revolving speed 2800r/
Mixed at high speed 2.8h under min obtains mixture；The mixture is fitted into porcelain boat, is roasted at 860 DEG C in air atmosphere
20h is roasted, and carries out rapid cooling after the completion of roasting with the cooling velocity of 500 DEG C/min, obtains the nickel with subgrain structure
Base anode material.
Wherein, the Ni-based ternary precursor material is Ni0.5Co0.2Mn0.3(OH)2。
Using the nickel-base anode material with subgrain structure of above-mentioned acquisition as anode, using metal lithium sheet as cathode
It assembles button cell and carries out charge-discharge test, using the nickel-base anode material produced by the present invention with subgrain structure in 2C multiplying power
Lower first discharge specific capacity reaches 161mAh/g；Identical component, technique, but without the positive electrode Jing Guo rapid cooling at 2C times
First discharge specific capacity is 156mAh/g under rate, it is seen that subgrain structure significantly improves the electro-chemical activity of material.
Embodiment 4
A kind of Ni-based anode material for lithium-ion batteries with subgrain structure, which is characterized in that its chemical general formula is
LiNi0.5Co0.2Mn0.3O2。
The embodiment of the present invention is also providing a kind of Ni-based lithium ion battery with subgrain structure as described in above scheme just
Pole material the Ni-based ternary precursor material of 1000g and 403g lithium carbonate is added in miniature high-speed mixer, in revolving speed 2800r/
Mixed at high speed 2.8h under min obtains mixture；The mixture is fitted into porcelain boat, is roasted at 650 DEG C in air atmosphere
36h is roasted, and carries out rapid cooling after the completion of roasting with the cooling velocity of 200 DEG C/min, obtains the nickel with subgrain structure
Base anode material.
Wherein, the Ni-based ternary precursor material is Ni0.5Co0.2Mn0.3(OH)2。
Using the nickel-base anode material with subgrain structure of above-mentioned acquisition as anode, using metal lithium sheet as cathode
It assembles button cell and carries out charge-discharge test, using the nickel-base anode material produced by the present invention with subgrain structure in 2C multiplying power
Lower first discharge specific capacity reaches 165mAh/g；Identical component, technique, but without the positive electrode Jing Guo rapid cooling at 2C times
First discharge specific capacity is 159mAh/g under rate, it is seen that subgrain structure significantly improves the electro-chemical activity of material.
Embodiment 5
A kind of Ni-based anode material for lithium-ion batteries with subgrain structure, which is characterized in that its chemical general formula is
LiNi0.5Co0.2Mn0.3O2。
The embodiment of the present invention is also providing a kind of Ni-based lithium ion battery with subgrain structure as described in above scheme just
Pole material the Ni-based ternary precursor material of 1000g and 403g lithium carbonate is added in miniature high-speed mixer, in revolving speed 2800r/
Mixed at high speed 2.8h under min obtains mixture；The mixture is fitted into porcelain boat, is roasted at 1100 DEG C in air atmosphere
4h is burnt, is roasted, rapid cooling is carried out with the cooling velocity of 200 DEG C/min after the completion of roasting, obtaining has subgrain structure
Nickel-base anode material.
Wherein, the Ni-based ternary precursor material is Ni0.5Co0.2Mn0.3(OH)2。
Using the nickel-base anode material with subgrain structure of above-mentioned acquisition as anode, using metal lithium sheet as cathode
It assembles button cell and carries out charge-discharge test, using the nickel-base anode material produced by the present invention with subgrain structure in 2C multiplying power
Lower first discharge specific capacity reaches 163mAh/g；Identical component, technique, but without the positive electrode Jing Guo rapid cooling at 2C times
First discharge specific capacity is 158mAh/g under rate, it is seen that subgrain structure significantly improves the electro-chemical activity of material.
Embodiment 6
A kind of Ni-based anode material for lithium-ion batteries with subgrain structure, which is characterized in that its chemical general formula is
LiNi0.5Co0.2Mn0.3O2。
The embodiment of the present invention is also providing a kind of Ni-based lithium ion battery with subgrain structure as described in above scheme just
Pole material the Ni-based ternary precursor material of 1000g and 403g lithium carbonate is added in miniature high-speed mixer, in revolving speed 500r/
Mixed at high speed 5h under min obtains mixture；The mixture is fitted into porcelain boat, is roasted at 860 DEG C in air atmosphere
20h is roasted, and carries out rapid cooling after the completion of roasting with the cooling velocity of 200 DEG C/min, obtains the nickel with subgrain structure
Base anode material.
Wherein, the Ni-based ternary precursor material is Ni0.5Co0.2Mn0.3(OH)2。
Using the nickel-base anode material with subgrain structure of above-mentioned acquisition as anode, using metal lithium sheet as cathode
It assembles button cell and carries out charge-discharge test, using the nickel-base anode material produced by the present invention with subgrain structure in 2C multiplying power
Lower first discharge specific capacity reaches 160mAh/g；Identical component, technique, but without the positive electrode Jing Guo rapid cooling at 2C times
First discharge specific capacity is 156mAh/g under rate, it is seen that subgrain structure significantly improves the electro-chemical activity of material.
Embodiment 7
A kind of Ni-based anode material for lithium-ion batteries with subgrain structure, which is characterized in that its chemical general formula is
LiNi0.5Co0.2Mn0.3O2。
The embodiment of the present invention is also providing a kind of Ni-based lithium ion battery with subgrain structure as described in above scheme just
Pole material the Ni-based ternary precursor material of 1000g and 403g lithium carbonate is added in miniature high-speed mixer, in revolving speed 5000r/
Mixed at high speed 0.5h under min obtains mixture；The mixture is fitted into porcelain boat, is roasted at 860 DEG C in air atmosphere
20h is roasted, and carries out rapid cooling after the completion of roasting with the cooling velocity of 200 DEG C/min, obtains the nickel with subgrain structure
Base anode material.
Wherein, the Ni-based ternary precursor material is Ni0.5Co0.2Mn0.3(OH)2。
Using the nickel-base anode material with subgrain structure of above-mentioned acquisition as anode, using metal lithium sheet as cathode
It assembles button cell and carries out charge-discharge test, using the nickel-base anode material produced by the present invention with subgrain structure in 2C multiplying power
Lower first discharge specific capacity reaches 168mAh/g；Identical component, technique, but without the positive electrode Jing Guo rapid cooling at 2C times
First discharge specific capacity is 157mAh/g under rate, it is seen that subgrain structure significantly improves the electro-chemical activity of material.
Embodiment 8
A kind of Ni-based anode material for lithium-ion batteries with subgrain structure, which is characterized in that its chemical general formula is
LiNi0.80Co0.15Al0.05O2。
The embodiment of the present invention is also providing a kind of Ni-based lithium ion battery with subgrain structure as described in above scheme just
Pole material the Ni-based ternary precursor material of 1000g and 415g lithium carbonate is added in miniature high-speed mixer, in revolving speed 2800r/
Mixed at high speed 2.8h under min obtains mixture；The mixture is fitted into porcelain boat, is roasted at 815 DEG C in oxygen atmosphere
16h is roasted, and carries out rapid cooling after the completion of roasting with the cooling velocity of 50 DEG C/min, obtains the nickel with subgrain structure
Base anode material.
Wherein, the Ni-based ternary precursor material is Ni0.80Co0.15Al0.05(OH)2。
Using the nickel-base anode material with subgrain structure of above-mentioned acquisition as anode, using metal lithium sheet as cathode
It assembles button cell and carries out charge-discharge test, using the nickel-base anode material produced by the present invention with subgrain structure in 2C multiplying power
Lower first discharge specific capacity reaches 190mAh/g；Identical component, technique, but without the positive electrode Jing Guo rapid cooling at 2C times
First discharge specific capacity is 187mAh/g under rate, it is seen that subgrain structure significantly improves the electro-chemical activity of material.
Embodiment 9
A kind of Ni-based anode material for lithium-ion batteries with subgrain structure, which is characterized in that its chemical general formula is
LiNi0.80Co0.15Al0.05O2。
The embodiment of the present invention is also providing a kind of Ni-based lithium ion battery with subgrain structure as described in above scheme just
Pole material the Ni-based ternary precursor material of 1000g and 900g lithium hydroxide is added in miniature high-speed mixer, in revolving speed
Mixed at high speed 2.8h under 2800r/min obtains mixture；The mixture is fitted into porcelain boat, at 815 DEG C in oxygen atmosphere
Lower roasting 16h, is roasted, and carries out rapid cooling after the completion of roasting with the cooling velocity of 50 DEG C/min, and obtaining has subgrain knot
The nickel-base anode material of structure.
Wherein, the Ni-based ternary precursor material is Ni0.80Co0.15Al0.05(OH)2。
Using the nickel-base anode material with subgrain structure of above-mentioned acquisition as anode, using metal lithium sheet as cathode
It assembles button cell and carries out charge-discharge test, using the nickel-base anode material produced by the present invention with subgrain structure in 2C multiplying power
Lower first discharge specific capacity reaches 188mAh/g；Identical component, technique, but without the positive electrode Jing Guo rapid cooling at 2C times
First discharge specific capacity is 181mAh/g under rate, it is seen that subgrain structure significantly improves the electro-chemical activity of material.
Embodiment 10
A kind of Ni-based anode material for lithium-ion batteries with subgrain structure, which is characterized in that its chemical general formula is
LiNi0.80Co0.10Mn0.05Al0.05O2。
The embodiment of the present invention is also providing a kind of Ni-based lithium ion battery with subgrain structure as described in above scheme just
Pole material the Ni-based ternary precursor material of 1000g and 200g lithium hydroxide is added in miniature high-speed mixer, in revolving speed
Mixed at high speed 3h under 1000r/min obtains mixture；The mixture is fitted into porcelain boat, in oxygen atmosphere at 810 DEG C
15.5h is roasted, is roasted, rapid cooling is carried out with the cooling velocity of 100 DEG C/min after the completion of roasting, obtaining has subgrain knot
The nickel-base anode material of structure.
Wherein, the Ni-based ternary precursor material is Ni0.80Co0.10Mn0.05Al0.05(OH)2。
Using the nickel-base anode material with subgrain structure of above-mentioned acquisition as anode, using metal lithium sheet as cathode
It assembles button cell and carries out charge-discharge test, using the nickel-base anode material produced by the present invention with subgrain structure in 2C multiplying power
Lower first discharge specific capacity reaches 196mAh/g；Identical component, technique, but without the positive electrode Jing Guo rapid cooling at 2C times
First discharge specific capacity is 194mAh/g under rate, it is seen that subgrain structure significantly improves the electro-chemical activity of material.
Embodiment 11
A kind of Ni-based anode material for lithium-ion batteries with subgrain structure, which is characterized in that its chemical general formula is
LiNi0.80Co0.10Mn0.05Al0.05O2。
The embodiment of the present invention is also providing a kind of Ni-based lithium ion battery with subgrain structure as described in above scheme just
Pole material the Ni-based ternary precursor material of 1000g and 409g lithium hydroxide is added in miniature high-speed mixer, in revolving speed
Mixed at high speed 2.8h under 2800r/min obtains mixture；The mixture is fitted into porcelain boat, 1100 in oxygen atmosphere
20h is roasted at DEG C, is roasted, rapid cooling is carried out with the cooling velocity of 200 DEG C/min after the completion of roasting, and obtaining has subgrain
The nickel-base anode material of structure.
Wherein, the Ni-based ternary precursor material is Ni0.80Co0.10Mn0.05Al0.05(OH)2。
Using the nickel-base anode material with subgrain structure of above-mentioned acquisition as anode, using metal lithium sheet as cathode
It assembles button cell and carries out charge-discharge test, using the nickel-base anode material produced by the present invention with subgrain structure in 2C multiplying power
Lower first discharge specific capacity reaches 195mAh/g；Identical component, technique, but without the positive electrode Jing Guo rapid cooling at 2C times
First discharge specific capacity is 189mAh/g under rate, it is seen that subgrain structure significantly improves the electro-chemical activity of material.
Embodiment 12
A kind of Ni-based anode material for lithium-ion batteries with subgrain structure, which is characterized in that its chemical general formula is
LiNi0.5Co0.2Mn0.3O2。
The embodiment of the present invention is also providing a kind of Ni-based lithium ion battery with subgrain structure as described in above scheme just
Pole material the Ni-based ternary precursor material of 1000g and 403g lithium carbonate is added in miniature high-speed mixer, in revolving speed 2800r/
Mixed at high speed 2.8h under min obtains mixture；The mixture is fitted into porcelain boat, is roasted at 860 DEG C in oxygen atmosphere
20h is roasted, and carries out rapid cooling after the completion of roasting with the cooling velocity of 20 DEG C/min, obtains the nickel with subgrain structure
Base anode material.
Wherein, the Ni-based ternary precursor material is Ni0.5Co0.2Mn0.3(OH)2。
Using the nickel-base anode material with subgrain structure of above-mentioned acquisition as anode, using metal lithium sheet as cathode
It assembles button cell and carries out charge-discharge test, using the nickel-base anode material produced by the present invention with subgrain structure in 2C multiplying power
Lower first discharge specific capacity reaches 169mAh/g；Identical component, technique, but without the positive electrode Jing Guo rapid cooling at 2C times
First discharge specific capacity is 165mAh/g under rate, it is seen that subgrain structure significantly improves the electro-chemical activity of material.
Embodiment 13
A kind of Ni-based anode material for lithium-ion batteries with subgrain structure, which is characterized in that its chemical general formula is
LiNi0.5Co0.2Mn0.3O2。
The embodiment of the present invention is also providing a kind of Ni-based lithium ion battery with subgrain structure as described in above scheme just
Pole material the Ni-based ternary precursor material of 1000g and 403g lithium carbonate is added in miniature high-speed mixer, in revolving speed 2800r/
Mixed at high speed 2.8h under min obtains mixture；The mixture is fitted into porcelain boat, is roasted at 1000 DEG C in oxygen atmosphere
20h is burnt, is roasted, rapid cooling is carried out with the cooling velocity of 120 DEG C/min after the completion of roasting, obtaining has subgrain structure
Nickel-base anode material.
Wherein, the Ni-based ternary precursor material is Ni0.5Co0.2Mn0.3(OH)2。
Using the nickel-base anode material with subgrain structure of above-mentioned acquisition as anode, using metal lithium sheet as cathode
It assembles button cell and carries out charge-discharge test, using the nickel-base anode material produced by the present invention with subgrain structure in 2C multiplying power
Lower first discharge specific capacity reaches 167mAh/g identical component, technique, but without the positive electrode Jing Guo rapid cooling at 2C times
First discharge specific capacity is 162mAh/g under rate, it is seen that subgrain structure significantly improves the electro-chemical activity of material.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (8)
1. a kind of Ni-based anode material for lithium-ion batteries with subgrain structure, which is characterized in that its chemical general formula is Li(1+y)
NixR(1-x-1/2y)O2, wherein 0.1 < x < 0.99,0.0001 < y < 0.2, R be the periodic table of elements in addition to lithium, nickel, chromium extremely
Few one kind.
2. the Ni-based anode material for lithium-ion batteries according to claim 1 with subgrain structure, which is characterized in that described
Li(1+y)NixR(1-x-1/2y)O2For subgrain structure, the crystallite size range of the subgrain structure is 5nm-1000nm.
3. a kind of preparation side for leading the Ni-based anode material for lithium-ion batteries with subgrain structure as claimed in claim 1 or 2
Method, which is characterized in that its method are as follows: Ni-based ternary precursor material and lithium source are subjected to mixed at high speed, obtain mixture；By institute
It states mixture to be roasted in air atmosphere, rapid cooling is carried out with the cooling velocity of 10-500 DEG C/min after the completion of roasting,
Obtain the nickel-base anode material with subgrain structure.
4. according to claim 3 leading the Ni-based lithium ion battery with subgrain structure just as claimed in claim 1 or 2
The preparation method of pole material, which is characterized in that the molar ratio of the Ni-based ternary precursor material and lithium source is (1~3): 1.
5. according to claim 4 leading the Ni-based lithium ion battery with subgrain structure just as claimed in claim 1 or 2
The preparation method of pole material, which is characterized in that the mixed at high speed uses ternary material high speed blender, the mixed at high speed
Speed is 500~5000r/min, and the time of the mixed at high speed is 0.5~5h.
6. according to claim 4 leading the Ni-based lithium ion battery with subgrain structure just as claimed in claim 1 or 2
The preparation method of pole material, which is characterized in that the lithium source is lithium carbonate or lithium hydroxide.
7. according to claim 4 leading the Ni-based lithium ion battery with subgrain structure just as claimed in claim 1 or 2
The preparation method of pole material, which is characterized in that the material doped at least one metallic element of Ni-based ternary precursor, the gold
It is at least one in addition to lithium, nickel, chromium in the periodic table of elements for belonging to element.
8. according to claim 5 leading the Ni-based lithium ion battery with subgrain structure just as claimed in claim 1 or 2
The preparation method of pole material, which is characterized in that the maturing temperature is 650-1100 DEG C, and the calcining time is 4~36h.
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| CN201711329047.2A CN109921014B (en) | 2017-12-13 | 2017-12-13 | Nickel-based lithium ion battery anode material with sub-crystal structure and preparation method thereof |
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| CN201711329047.2A CN109921014B (en) | 2017-12-13 | 2017-12-13 | Nickel-based lithium ion battery anode material with sub-crystal structure and preparation method thereof |
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