CN105810900A - High-rate negative electrode material of lithium ion battery and lithium ion battery - Google Patents
High-rate negative electrode material of lithium ion battery and lithium ion battery Download PDFInfo
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Abstract
The invention discloses a high-rate negative electrode material of a lithium ion battery and the lithium ion battery. The high-rate negative electrode material comprise a substance A, a substance B, a substance C and a substance D, wherein the substance A is of a microstructure provided with a typical layered structure, the distance among layers is 0.3-0.4 nanometers, the substance A comprises one or more of natural graphite, artificial graphite, graphite scraps, intermediate-phase carbon microspheres, petroleum coke, pitch coke, needle coke, coke, soft carbon and hard carbon, the substance B is uniformly dispersed and distributed on the surface and at the periphery of the substance A and comprises one or more of the soft carbon, the hard carbon or a high molecular polymer, the substance C comprises one or more of carbon black, acetylene black, furnace black, kohjin carbon, graphite particles or conductive particles, the substance D comprises one or more of a carbon nanotube, carbon fiber and conductive fiber, and the substance C and the substance D are uniformly dispersed and distributed in the substance B. therefore, a three-dimensional conductive network structure and a charge transfer passage are formed in the negative electrode material, and the lithium ion diffusion distance is shortened.
Description
Technical field
The present invention relates to field of material technology, particularly relate to a kind of high rate lithium ionic cell cathode material and lithium ion battery.
Background technology
In current business-like lithium ion battery negative material, carbon negative pole material includes graphite, soft carbon and hard carbon, wherein for gram volume, graphite capacity is the highest, and theoretical capacity is 372mAh/g, and current actual capacity plays up to more than 360mAh/g, advantages such as exactly because graphite material tool capacity height, Li insertion extraction good reversibility, potential plateau are low and cycle performance is excellent, it is as being the main negative material of 3C electronic product and being widely applied.
But namely lithium ion from the edge of graphite linings, can only be parallel to the direction turnover graphite linings structure of graphite linings, it is impossible to passing in and out from the direction of vertical graphite linings, therefore the diffusion coefficient of lithium ion turnover graphite linings is little, directly results in the high rate performance that lithium ion battery is poor.Additionally, under high magnification during discharge and recharge, when lithium ion has little time to diffuse into graphite layers, lithium ion concentrates on negative electrode surface and is reduced into the lithium metal dendrite that activity is high.Lithium metal dendrite easily reacts with electrolyte, consumes electrolyte, makes battery capacity reduce, the serious curtailment cycle life of battery；Lithium metal dendrite gathers the internal short-circuit that to a certain degree may also result in battery and causes security incident.
Therefore, solve the high rate performance of graphite cathode material, no matter from charge/discharge rates, or in security performance and the consideration of battery life, be all very necessary and urgent.At present, the energy density of lithium ion battery of future generation, power density, life-span are had higher requirement by electric automobile field especially, the aspects such as nano-pore, micron openings graphite and polygon graphite have been carried out many-sided research by people further, to solving the high-power demand of lithium ion battery, but do not produce a desired effect.Therefore, considering and the industry urgent needs to high power density lithium ion battery lithium ion battery power density, the lithium ion battery that exploitation high power density takes into account high-energy-density simultaneously is significant.
Generally solve the high rate performance of graphite negative electrodes material mainly through punching, reduce particle size and surface modification.Such as patent CN103682282A be by metal and/or metallic compound load on graphite；The graphite being loaded with catalyst is reacted with reaction gas, obtain the graphite cathode material with loose structure, although this structure can increase lithium ion access way in graphite material, but the specific surface area of material increases, and affects starting efficiency and the energy density of full battery.Patent CN105024075A utilizes little graphite presoma, and the mean diameter D50 of graphite presoma is 5 μm～10 μm, and quick charge (1.5C) can reach more than 80% in 45 minutes, but high rate performance is still not good enough.
Summary of the invention
Embodiments provide a kind of high rate lithium ionic cell cathode material and lithium ion battery.This negative material utilizes less primary particle, shorten the diffusion length of lithium ion, simultaneously primary particle surface and around establish abundant conductive network, the fast transfer of lithium ion and electronics can be realized and transport, especially establishing the conductive channel of " point-line-surface ", this negative material provides the passage of the turnover layer structure enriched for lithium ion, shortens lithium ion diffusion length in the layered structure, there is capacity height, the feature that multiplying power property is fabulous.
First aspect, embodiments provides a kind of high rate lithium ionic cell cathode material, and described negative material is made up of A material, B substance, C material and D material；The particle size distribution (D50) of described negative material is 5 μm～40 μm；
Described A material includes: native graphite, Delanium, graphite are broken, carbonaceous mesophase spherules, petroleum coke, pitch coke, needle coke, coke, one or more combinations in soft carbon or hard carbon；
Described B substance includes: one or more combinations in soft carbon, hard carbon or macromolecule polyalcohol；
Described C material includes: one or more in white carbon black, acetylene black, furnace black, section's qin carbon, graphite granule or conductive particle；
Described D material includes: one or more combinations in CNT, carbon fiber, conductive fiber；
The microscopic appearance of described A material has typical layer structure, interlamellar spacing is between 0.3nm～0.4nm, described B substance even dispersion is distributed in surface and the surrounding of described A material, described C material and D material even dispersion respectively are distributed in described B substance, in described negative material, thus form three-dimensional conductive network structure and charge transferring channel, thus shortening the diffusion length of lithium ion.
Preferably, the particle size distribution (D50) of described negative material is 10 μm～35 μm.
Preferably, the particle size distribution (D50) of described A material is 0.5 μm～15 μm；The pattern of described A material is spherical, elliposoidal, cobble shaped and one or more in random polygon；Described A material shared weight ratio in negative material is 30%～98%.
It is further preferred that the particle size distribution (D50) of described A material is 1 μm～10 μm；Described A material shared weight ratio in negative material is 60%～90%.
Preferably, described B substance shared weight ratio in described negative material is 3%～60%.
Preferably, described C material shared weight ratio in described negative material is 0.01%～10%.
Preferably, described D material shared weight ratio in described negative material is 0.01%～5%.
Preferably, the pattern of described negative material is one or more in spherical, elliposoidal, cobble shaped or random polygon.
Preferably, described negative material is used for negative material or a portion of lithium ion battery, lithium-ion capacitor, lithium-sulfur cell or all-solid-state battery.
Second aspect, embodiments provides the lithium ion battery of a kind of negative material included described in above-mentioned first aspect.
The high rate lithium ionic cell cathode material that the embodiment of the present invention provides, utilize less primary particle, shorten the diffusion length of lithium ion, simultaneously primary particle surface and around establish abundant conductive network, the fast transfer of lithium ion and electronics can be realized and transport, especially establishing the conductive channel of " point-line-surface ", this negative material provides the passage of the turnover layer structure enriched for lithium ion, shortens lithium ion diffusion length in the layered structure.Therefore, this negative material has capacity height, the feature that multiplying power property is fabulous, also the demand of high-energy-density can be met while meeting high power density, thus the multiplying power property of lithium ion battery being greatly improved and extending the cycle life of battery, battery is made to meet the instructions for use in the field such as electric motor car and electric tool.
Accompanying drawing explanation
Below by drawings and Examples, the technical scheme of the embodiment of the present invention is described in further detail.
The structural representation of the high rate lithium ionic cell cathode material that Fig. 1 provides for the embodiment of the present invention 1；
The charge graph of 0.1C and the 10C of the high rate lithium ionic cell cathode material that Fig. 2 provides for the embodiment of the present invention 2；
The charge graph of 0.1C and the 10C of the high rate lithium ionic cell cathode material that Fig. 3 provides for the embodiment of the present invention 3；
The charge graph of 0.1C and the 10C of the high rate lithium ionic cell cathode material that Fig. 4 provides for the embodiment of the present invention 4；
The charge graph of 0.1C and the 10C of the high rate lithium ionic cell cathode material that Fig. 5 provides for the embodiment of the present invention 5；
The charge graph of 0.1C and the 10C of the high rate lithium ionic cell cathode material that Fig. 6 provides for the embodiment of the present invention 6；
The charge graph of 0.1C and the 10C of the high rate lithium ionic cell cathode material that Fig. 7 provides for the embodiment of the present invention 7；
The charge graph of 0.1C and the 10C of the high rate lithium ionic cell cathode material that Fig. 8 provides for the embodiment of the present invention 8；
The charge graph of 0.1C and the 10C of the high rate lithium ionic cell cathode material that Fig. 9 provides for the embodiment of the present invention 9；
The charge graph of 0.1C and the 10C of the high rate lithium ionic cell cathode material that Figure 10 provides for comparative example 1 of the present invention；
The charge graph of 0.1C and the 10C of the high rate lithium ionic cell cathode material that Figure 11 provides for comparative example 2 of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but is not intended to limit the scope of the invention.
Embodiment 1
The embodiment of the present invention 1 provides a kind of high rate lithium ionic cell cathode material, is made up of A material, B substance, C material and D material.Concrete microstructure is as shown in Figure 1.
Wherein, A material includes: native graphite, Delanium, graphite are broken, carbonaceous mesophase spherules, petroleum coke, pitch coke, needle coke, coke, one or more combinations in soft carbon or hard carbon；Microscopic appearance has typical layer structure, and interlamellar spacing is between 0.3nm～0.4nm；This part is the significant contributor of the capacity of negative material；
The particle size distribution (D50) of A material is 0.5 μm～15 μm, it is preferred to 1 μm～10 μm.The pattern of A material is spherical, elliposoidal, cobble shaped and one or more in random polygon；Choosing of little particle size is diffusion length in order to reduce lithium ion, increases the high rate performance of A material itself, is favorably improved the multiplying power property of negative material.
Described herein as, D50 refers to that the cumulative particle sizes percentile of a sample reaches particle diameter corresponding when 50%.Its physical significance is that particle diameter accounts for 50% more than its granule, also accounts for 50% less than its granule, and D50 is also meso-position radius or median particle diameter.D50 is commonly used to represent the particle mean size of powder body.
The pattern of A material can be spherical, elliposoidal, cobble shaped and one or more in random polygon, and weight ratio shared in negative material is 30%～98%, it is preferred to 60%～90%.
B substance includes: one or more combinations in soft carbon, hard carbon or macromolecule polyalcohol；B substance even dispersion is distributed in surface and the surrounding of described A material, and B substance is except undertaking portion capacity, and electric conductivity own is better, it is possible to achieve the fast transfer of electronics and ion；Additionally, the B substance of A material surface distribution, make A material surface modifiy by B substance, improve the ability that in A material, lithium ion quickly passes in and out.
B substance weight ratio shared by negative material is 3%～60%, it is preferred to 10%～50%.
C material includes: one or more in white carbon black, acetylene black, furnace black, section's qin carbon, graphite granule or conductive particle；C material even dispersion is distributed in described B substance, and C material itself has good electric conductivity, adds the electric conductivity that can promote B substance in B substance further；C material weight ratio in negative material is 0.01%～10%, it is preferred to 0.1%～3%.
D material includes: one or more combinations in CNT, carbon fiber, conductive fiber；D material even dispersion is distributed in described B substance, and D material makes electronics and ion quickly to migrate along linear structure and diffusion due to the feature of its linear structure, it is achieved electric charge is quickly to negative material interior shifting, it is possible to achieve the quick turnover of lithium ion；D material weight ratio shared by negative material is 0.01%～5%, it is preferred to 0.1%～3%.
Even dispersion is distributed in surface and the B substance around of A material, and even dispersion is distributed in the C material in B substance and D material, forms three-dimensional conductive network structure and charge transferring channel, thus shortening the diffusion length of lithium ion in negative material.
The negative material that the embodiment of the present invention provides, particle size distribution (D50) is 5 μm～40 μm, and pattern can be one or more in spherical, elliposoidal, cobble shaped or random polygon.It utilizes less primary particle, shorten the diffusion length of lithium ion, simultaneously primary particle surface and around establish abundant conductive network, the fast transfer of lithium ion and electronics can be realized and transport, especially the conductive channel of " point-line-surface " is established, the passage of the turnover layer structure enriched is provided for lithium ion, shortens lithium ion diffusion length in the layered structure.Therefore, this negative material has capacity height, the feature that multiplying power property is fabulous, also the demand of high-energy-density can be met while meeting high power density, thus the multiplying power property of battery being greatly improved and extending the cycle life of battery, battery is made to meet the instructions for use in the field such as electric motor car and electric tool.
The negative material that the present embodiment provides, can be used as the negative material of lithium ion battery, lithium-ion capacitor, lithium-sulfur cell, all-solid-state battery etc. or the part as its negative material.
Below, by some specific embodiments, the composition of negative material, performance that the embodiment of the present invention is provided are described in more detail.
Embodiment 2
The embodiment of the present invention 2 provides a kind of high rate lithium ionic cell cathode material, and including four kinds of material compositions of A, B, C and D, wherein A material is native graphite, and granule size is 2 microns, is shaped as polygon, and weight accounts for the 85% of negative material；B substance is soft carbon, and even dispersion is distributed in surface and the surrounding of described A material, and weight accounts for the 14.8% of negative material；C material is white carbon black, and the weight ratio in negative material is 0.1%；D material is CNT, and weight accounts for the 0.1% of negative material；The D50 of negative material is 20 microns, and specific surface area is 1.8m2/g；
By this negative material, conductive additive, bonding agent, proportionally 95%:2%:3% weighs, and at room temperature, carries out slurry and prepare in beater.The slurry prepared is spread evenly across on Copper Foil.After drying 2 hours in air dry oven at 50 DEG C, it is cut to the pole piece of 8 × 8mm, vacuumizing and drying 10 hours at 100 DEG C in vacuum drying oven.By the pole piece after drying, it is transferred in glove box immediately standby in order to packed battery.
The assembling of simulated battery is to carry out in the glove box containing high-purity Ar atmosphere, with lithium metal as to electrode, the LiPF of 1 mole6Solution in EC/DMC, as electrolyte, is assembled into battery.Discharge and recharge instrument is used to carry out constant current charge-discharge pattern test, discharging by voltage is 0.005V, and charging is 1V by voltage, carries out under first week charge-discharge test C/10 electric current density, second week discharge test carries out under C/10 electric current density, and charging measurement carries out under 10C electric current density.As in figure 2 it is shown, the reversible capacity of C/10 is 345mAh/g, starting efficiency 91%, the reversible capacity of 10C is 230mAh/g, and capacity remains the 67% of 0.1C.
Embodiment 3
The embodiment of the present invention 3 provides a kind of high rate lithium ionic cell cathode material, and including four kinds of material compositions of A, B, C and D, wherein A material is native graphite, and granule size is 2 microns, is shaped as polygon, and weight accounts for the 83% of described negative material；B substance is soft carbon, and even dispersion is distributed in surface and the surrounding of described A material, and weight accounts for the 13% of described negative material；C material is white carbon black, and the weight ratio in negative material is 2%；D material is CNT, and weight accounts for the 2% of described negative material；The D50 of described negative material is 21 microns, and specific surface area is 1.9m2/g；
Negative material is utilized to prepare the preparation process of cathode pole piece, battery assembling and battery testing with embodiment 2, test result as it is shown on figure 3, display C/10 reversible capacity be 343mAh/g, starting efficiency 90%, the reversible capacity of 10C is 281mAh/g, and capacity remains the 82% of 0.1C.
Embodiment 4
The embodiment of the present invention 4 provides a kind of high rate lithium ionic cell cathode material, and including four kinds of material compositions of A, B, C and D, wherein A material is Delanium, and granule size is 5 microns, is shaped as polygon, and weight accounts for the 85% of negative material；B substance is soft carbon, and even dispersion is distributed in surface and the surrounding of described A material, and weight accounts for the 14.8% of negative material；C material is white carbon black, and the weight ratio in negative material is 0.1%；D material is CNT, and weight accounts for the 0.1% of negative material；The D50 of negative material is 25 microns, and specific surface area is 1.5m2/g；
Negative material is utilized to prepare the preparation process of cathode pole piece, battery assembling and battery testing with embodiment 2, as shown in Figure 4, the reversible capacity of display C/10 is 346mAh/g to test result, starting efficiency 92%, the reversible capacity of 10C is 267mAh/g, and capacity remains the 77% of 0.1C.
Embodiment 5
The embodiment of the present invention 5 provides a kind of high rate lithium ionic cell cathode material, and including four kinds of material compositions of A, B, C and D, wherein A material is Delanium, and granule size is 5 microns, is shaped as polygon, and weight accounts for the 83% of negative material；B substance is soft carbon, and even dispersion is distributed in surface and the surrounding of described A material, and weight accounts for the 13% of negative material；C material is white carbon black, and the weight ratio in negative material is 2%；D material is CNT, and weight accounts for the 2% of negative material；The D50 of negative material is 23 microns, and specific surface area is 2.2m2/g；
Negative material is utilized to prepare the preparation process of cathode pole piece, battery assembling and battery testing with embodiment 2, test result as it is shown in figure 5, display C/10 reversible capacity be 348mAh/g, starting efficiency 90%, the reversible capacity of 10C is 293mAh/g, and capacity remains the 84% of 0.1C.
Embodiment 6
The embodiment of the present invention 6 provides a kind of high rate lithium ionic cell cathode material, and including four kinds of material compositions of A, B, C and D, wherein A material is MCMB, and granule size is 5 microns, is shaped as polygon, and weight accounts for the 85% of described negative material；B substance is soft carbon, and even dispersion is distributed in surface and the surrounding of A material, and weight accounts for the 14.8% of negative material；C material is white carbon black, and the weight ratio in negative material is 0.1%；D material is CNT, and weight accounts for the 0.1% of negative material；The D50 of negative material is 22 microns, and specific surface area is 2m2/g；
Negative material is utilized to prepare the preparation process of cathode pole piece, battery assembling and battery testing with embodiment 2, as shown in Figure 6, the reversible capacity of display C/10 is 330mAh/g to test result, starting efficiency 89%, the reversible capacity of 10C is 289mAh/g, and capacity remains the 88% of 0.1C.
Embodiment 7
The embodiment of the present invention 7 provides a kind of high rate lithium ionic cell cathode material, and including four kinds of material compositions of A, B, C and D, wherein A material is MCMB, and granule size is 5 microns, is shaped as polygon, and weight accounts for the 83% of described negative material；B substance is soft carbon, and even dispersion is distributed in surface and the surrounding of A material, and weight accounts for the 13% of described negative material；C material is white carbon black, and the weight ratio in negative material is 2%；D material is CNT, and weight accounts for the 2% of described negative material；The D50 of described negative material is 22 microns, and specific surface area is 2.5m2/g；
Negative material is utilized to prepare the preparation process of cathode pole piece, battery assembling and battery testing with embodiment 2, the reversible capacity of test result display C/10 is 332mAh/g, starting efficiency 90%, the reversible capacity of 10C is 310mAh/g, and capacity remains the 93% of 0.1C..
Embodiment 8
The embodiment of the present invention 8 provides a kind of high rate lithium ionic cell cathode material, and including four kinds of material compositions of A, B, C and D, wherein A material is Delanium, and granule size is 5 microns, is shaped as polygon, and weight accounts for the 83% of described negative material；B substance is hard carbon, and even dispersion is distributed in surface and the surrounding of described A material, and weight accounts for the 13% of described negative material；C material is white carbon black, and the weight ratio in negative material is 2%；D material is CNT, and weight accounts for the 2% of described negative material；The D50 of described negative material is 21 microns, and specific surface area is 2.6m2/g；
Negative material is utilized to prepare the preparation process of cathode pole piece, battery assembling and battery testing with embodiment 2, as shown in Figure 8, the reversible capacity of display C/10 is 351mAh/g to test result, starting efficiency 90%, the reversible capacity of 10C is 303mAh/g, and capacity remains the 86% of 0.1C.
Embodiment 9
The embodiment of the present invention 9 provides a kind of high rate lithium ionic cell cathode material, and including four kinds of material compositions of A, B, C and D, wherein A material is Delanium, and granule size is 5 microns, is shaped as polygon, and weight accounts for the 83% of negative material；B substance is macromolecule polyalcohol, and such as polyaniline, even dispersion is distributed in surface and the surrounding of A material, and weight accounts for the 13% of negative material；C material is white carbon black, and the weight ratio in negative material is 2%；D material is CNT, and weight accounts for the 2% of described negative material；The D50 of negative material is 23 microns. specific surface area is 4.5m2/g；
Negative material is utilized to prepare the preparation process of cathode pole piece, battery assembling and battery testing with embodiment 2, test result as it is shown in figure 9, display C/10 reversible capacity be 348mAh/g, starting efficiency 88%, the reversible capacity of 10C is 312mAh/g, and capacity remains the 90% of 0.1C.
Comparative example 1
This comparative example is for illustrating the high rate performance of general natural graphite negative material.In this example, general natural graphite granularity is 10 microns, and specific surface area is 2m2/g。
The preparation process of general natural graphite cathode pole piece, battery assembling and battery testing with embodiment 2, except that be general natural graphite.
As shown in Figure 10, the reversible capacity of display C/10 is 351mAh/g to test result, and starting efficiency is 91%, and the reversible capacity of 10C is 70mAh/g, and capacity remains the 20% of 0.1C.
Comparative example 2
This comparative example is for illustrating the high rate performance of common artificial plumbago negative pole material.In this example, common artificial graphite particle size is 18 microns, and specific surface area is 1.5m2/g。
The preparation process of common artificial plumbago negative pole pole piece, battery assembling and battery testing with embodiment 2, except that be common Delanium.
As shown in figure 11, the reversible capacity of display C/10 is 356mAh/g to test result, and starting efficiency is 92%, and the reversible capacity of 10C is 107mAh/g, and capacity remains the 30% of 0.1C.
Negative material in embodiment 2-9 and comparative example 1,2 carries out the index tests such as particle diameter, specific surface area, starting efficiency, 0.1C reversible capacity, 10C reversible capacity, 10C reversible capacity maintenance (relative to 0.1C) respectively, and the results are shown in Table 1.
Table 1
Data from table 1 are it can be seen that the 10C rate capability of negative material in comparative example 1 and comparative example 2 keeps the 20% and 30% of respectively 0.1C, it is possible to assert that high rate performance is poor, it is impossible to meet the demand of high power lithium ion cell；And the high rate lithium ionic cell cathode material of the employing present invention as shown in embodiment 2-embodiment 9, specific surface area increases, maximum 4.5m2/ g, minimum 1.8m2/ g, interval in normal range；The most important thing is, the 10C rate capability of negative material described in embodiment 2-embodiment 9 keeps both being greater than more than 67% (relative to 0.1C), reaches as high as 93%, far above the parameter value in comparative example 1,2.It may be concluded that adopt high rate lithium ionic cell cathode material of the present invention, high rate performance is excellent, and gram volume is high, is simultaneously suitable for the lithium ion battery of high-energy-density and high power density.
Above-described detailed description of the invention; the purpose of the present invention, technical scheme and beneficial effect have been further described; it is it should be understood that; the foregoing is only the specific embodiment of the present invention; the protection domain being not intended to limit the present invention; all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (10)
1. a high rate lithium ionic cell cathode material, it is characterised in that described negative material is made up of A material, B substance, C material and D material；The particle size distribution (D50) of described negative material is 5 μm～40 μm；
Described A material includes: native graphite, Delanium, graphite are broken, carbonaceous mesophase spherules, petroleum coke, pitch coke, needle coke, coke, one or more combinations in soft carbon or hard carbon；
Described B substance includes: one or more combinations in soft carbon, hard carbon or macromolecule polyalcohol；
Described C material includes: one or more in white carbon black, acetylene black, furnace black, section's qin carbon, graphite granule or conductive particle；
Described D material includes: one or more combinations in CNT, carbon fiber, conductive fiber；
The microscopic appearance of described A material has typical layer structure, interlamellar spacing is between 0.3nm～0.4nm, described B substance even dispersion is distributed in surface and the surrounding of described A material, described C material and D material even dispersion respectively are distributed in described B substance, in described negative material, thus form three-dimensional conductive network structure and charge transferring channel, thus shortening the diffusion length of lithium ion.
2. negative material according to claim 1, it is characterised in that the particle size distribution (D50) of described negative material is 10 μm～35 μm.
3. negative material according to claim 1, it is characterised in that the particle size distribution (D50) of described A material is 0.5 μm～15 μm；The pattern of described A material is spherical, elliposoidal, cobble shaped and one or more in random polygon；Described A material shared weight ratio in negative material is 30%～98%.
4. negative material according to claim 3, it is characterised in that the particle size distribution (D50) of described A material is 1 μm～10 μm；Described A material shared weight ratio in negative material is 60%～90%.
5. negative material according to claim 1, it is characterised in that described B substance shared weight ratio in described negative material is 3%～60%.
6. negative material according to claim 1, it is characterised in that described C material shared weight ratio in described negative material is 0.01%～10%.
7. negative material according to claim 1, it is characterised in that described D material shared weight ratio in described negative material is 0.01%～5%.
8. negative material according to claim 1, it is characterised in that the pattern of described negative material is one or more in spherical, elliposoidal, cobble shaped or random polygon.
9. negative material according to claim 1, it is characterised in that described negative material is used for negative material or a portion of lithium ion battery, lithium-ion capacitor, lithium-sulfur cell or all-solid-state battery.
10. the lithium ion battery including the arbitrary described negative material of the claims 1-9.
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Application publication date: 20160727 |