CN103000863B - Sn-Co/C alloy cathode material of lithium ion battery and preparation method thereof - Google Patents
Sn-Co/C alloy cathode material of lithium ion battery and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a Sn-Co/C alloy cathode material of a lithium ion battery and a preparation method thereof. The preparation method comprises the steps: uniformly mixing Sn powder and Co powder according to the mass ratio of (99:1) to (97:3), melting the mixture of the Sn powder and the Co powder, and carrying out spraying cooling to obtain a Sn-Co composite material; then adding an acid solution with the concentration being 1-3mol/L into a Sn-Co composite material for acid treatment to obtain a Sn-Co material subjected to the acid treatment; and mixing and sintering the Sn-Co material with an organic carbon source and asphalt in sequence to obtain an Sn-Co/C alloy cathode material. According to the invention, by adoption of acid etching, primary carbon coating based on the organic carbon source and secondary carbon coating based on the asphalt, the electrode is limited in expansion while being endowed with an expansion space, so that the material is prevented from being pulverized in a discharge/charge process. The prepared Sn-Co/C alloy cathode material is a solid solution alloy, has excellent mechanical strength, is free from the problem of electrode capacity reduction caused by the material itself, is improved in cyclic performance and electrode capacity at the same time, and has the advantages of high charge/discharge capacity and good cyclic performance.
Description
Technical field
The invention belongs to technical field of electrochemistry, particularly a kind of lithium ion battery Sn-Co/C alloy material of cathode and preparation method thereof.
Background technology
Because having, the advantage such as voltage is high, specific energy is high, operating temperature range is wide, environmental friendliness, memory-less effect receives much concern lithium ion battery, various portable type electronic products are applied to, as fields such as mobile phone, digital camera, notebook computer and electric tools, and progressively become one of energy resource supply of following hybrid vehicle and pure power vehicle.The progress of electrode new material is depended in the progress of battery to a great extent, and the negative material of lithium ion battery is all graphite and various material with carbon element substantially at present.Although commercialization graphite-like carbon negative pole material has good cycle performance, but specific discharge capacity lower (theoretical value is 372mAh/g), particularly volume and capacity ratio is quite limited, the very low easy initiation safety issue of embedding lithium current potential, the problems such as high-rate charge-discharge capability is poor, far can not meet the demand of following high-capacity and long-life electronic equipment and electric automobile thereof.
At present, the research of metal and alloy materials focuses mostly in new and effective storage cathode of lithium material system, wherein because it has, than the much higher specific capacity of material with carbon element, (theoretical specific capacity is respectively 994mAh/g to Sn, the twice that is graphite capacity is many), low price and capacity high and receive much concern, progressively become and be hopeful one of material replacing graphite cathode most.But pure Sn is as li-ion electrode negative material, takes off cubical expansivity in process reach 100～300% in lithium ion embedding, causes the mechanical disintegration of the lithium active materials such as Sn, causes electrode avalanche efflorescence inefficacy, electrode cycle performance to decline.For this shortcoming, current research mainly concentrates on composite oxides and forms middle phase compound with other metal compounds.Alloy material adopts the alloy material of active and nonactive element formation if Sn-Ni alloy is as lithium ion battery negative material mostly, this class material lithium ion embed and the process of deviating from can form active and inert matter structural material, active material reacts with lithium and provides energy, inert matter to serve as the basic structure that " buffer body " maintain electrode to ensure the cycle life of electrode.In the time introducing non-active material, although cycle performance has larger improvement, the problem that exists electrode capacity to reduce.Patent application 200710176459.7 discloses a kind of preparation method of tin, cobalt and carbon compound cathode materials of lithium ion battery, this application adopts carbothermic method, taking tin, cobalt compound as raw material, utilize excessive carbon dust reduce form tin-cobalt alloy prepare tin, cobalt and carbon compound cathode materials, but in preparation process, produce a large amount of CO, easily cause air pollution, be unfavorable for environmental protection, simultaneously hot carbon reduction is difficult to reduction and thoroughly introduces other by-product impurities.
Summary of the invention
Primary and foremost purpose of the present invention is that the shortcoming that overcomes prior art, with not enough, provides a kind of preparation method of lithium ion battery Sn-Co/C alloy material of cathode.
Another object of the present invention is to provide the lithium ion battery Sn-Co/C being obtained by following preparation method alloy material of cathode.
Object of the present invention is achieved through the following technical solutions: a kind of preparation method of lithium ion battery Sn-Co/C alloy material of cathode, comprises the steps:
(1) by vacuumizing after Sn powder and Co powder 97:3 in mass ratio～99:1 mixing, after 300～1000 DEG C of fusing 0.5～3h, carry out centrifugal spray, cooling, obtain Sn-Co composite material;
(2) the Sn-Co composite material of step (1) is joined in the acid solution of 1～3mol/L and carry out acid treatment, obtain the Sn-Co material after acid treatment;
(3) organic carbon source is poured into the Sn-Co material that adds step (2) after fully dissolving in absolute ethyl alcohol, stirred, dry, obtain drying material A; The Sn-Co material of step (2) and the mass ratio of organic carbon source are preferably 1:2.2～1:3.53;
(4) the drying material A of step (3) is placed in to tube furnace, under nitrogen protection, heats up with 2～4 DEG C/min, make its carbonization in 400～500 DEG C of sintering, complete a carbon coated, obtain Sn-Co/C materials A;
(5) pitch uniform dissolution is added after oxolane to the Sn-Co/C materials A of step (4), stir, carry out centrifugal spray, be cooled to 50～120 DEG C, obtain drying material B; The Sn-Co/C materials A of step (4) and the mass ratio of pitch are preferably 1:0.29～1:0.41;
(6) the drying material B of step (5) is placed in to tube furnace, under nitrogen protection, heats up with 2～4 DEG C/min, 900～1000 DEG C of sintering make its carbonization, complete secondary carbon coated, obtain Sn-Co/C alloy material of cathode;
In step (1):
Described Sn powder is preferably the Sn powder of diameter 10～100 μ m; Described Co powder is preferably the Co powder of diameter 10～100 μ m;
Described Sn powder and the mass ratio of Co powder are preferably 98:2;
Described fusing is preferably carried out in high temperature melting furnace;
Described centrifugal spray preferably carries out in spray tower, and the centrifugal speed of described spray tower is preferably 1000～30000r/min; Described cooling temperature is preferably 10～100 DEG C;
In step (2):
Described Sn-Co composite material and the mass volume ratio of acid solution are preferably 1g/3.7ml～1g/11.1ml;
Described acid solution is preferably aqueous acid; Described acid is preferably nitric acid, sulfuric acid or hydrochloric acid;
The described acid-treated time is preferably 2～5h;
In step (3):
Described organic carbon source is preferably citric acid, glucose or sucrose;
Described organic carbon source and the mass volume ratio of absolute ethyl alcohol are preferably 1g/2.02ml～1g/3.23ml;
The described dry following methods that preferably adopts carries out: 50～90 DEG C of vacuumize 10～25h after 60 DEG C of forced air drying 2h;
In step (4):
The time of described sintering is preferably 4～5h;
A described coated carbon content of carbon is preferably 10～15wt%;
In step (5):
Selected pitch is preferably hard pitch or mid temperature pitch;
Described pitch and the mass volume ratio of oxolane are preferably 1g/15.5ml～1g/22.2ml;
The centrifugal speed of described centrifugal spray is preferably 30000r/min;
In step (6):
The time of described sintering is preferably 8～12h;
The described coated carbon content of secondary carbon is preferably 15～20wt%;
A kind of lithium ion battery Sn-Co/C alloy material of cathode, prepares by above-mentioned preparation method;
The present invention has following advantage and effect with respect to prior art:
(1) the present invention by Sn powder and Co powder in mass ratio 97:3～99:1, use the cooling method of spraying after high temperature melting to prepare Sn-Co alloy, the particle size of gained Sn-Co alloy material is less, has improved electrode cycle performance.
(2) adopting acid etch, organic carbon source to carry out the coated and pitch of carbon, to carry out secondary carbon coated, and organic carbon source is once coated provides resilient coating, gives electrode material expansion space; The coated hard carbon that carried out of pitch secondary is coated, has effectively limited the expansion of electrode material, prevents material efflorescence in charge and discharge process.
(3) with respect to existing alloy material preparation method, as electrochemical deposition method, ball-milling method, high temperature solid-state method etc., preparation technology of the present invention is simple, easy to operate, and cost is low, and efficiency is high, without byproduct; The alloy electrode material uniform crystal particles of preparing is tiny, and degree of crystallinity and good mechanical properties increase electrode capacity in improving cycle performance, have charge/discharge capacity high, the advantage of good cycle.
(4) the lithium ion battery Sn-Co/C alloy material of cathode that prepared by the present invention is a kind of solid solution alloy, has good mechanical strength, with respect to existing non-solid solution body alloy, can not exist because material itself causes electrode capacity and reduce problem.
Brief description of the drawings
Fig. 1 is the X-ray diffractogram (XRD) of the lithium ion battery Sn-Co/C alloy material of cathode of embodiment 1; Wherein:
represent Sn, ◆ represent CoSn
2,
represent CoSn.
Fig. 2 is the scanning electron microscope diagram (SEM) of the lithium ion battery Sn-Co/C alloy material of cathode (before acid treatment) of embodiment 1.
Fig. 3 is the scanning electron microscope diagram (SEM) of the lithium ion battery Sn-Co/C alloy material of cathode (after acid treatment) of embodiment 1.
Fig. 4 is specific discharge capacity-cycle-index curve chart of the lithium ion battery Sn-Co/C alloy material of cathode of embodiment 1.
Fig. 5 is specific discharge capacity-cycle-index curve chart of the lithium ion battery Sn-Co/C alloy material of cathode of embodiment 2.
Fig. 6 is specific discharge capacity-cycle-index curve chart of the lithium ion battery Sn-Co/C alloy material of cathode of embodiment 3.
Fig. 7 is specific discharge capacity-cycle-index curve chart of the lithium ion battery Sn-Co/C alloy material of cathode of embodiment 4.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Case study on implementation 1
(1) after being mixed, the Sn powder 5.94g of 10 μ m and Co powder 0.06g put into smelting furnace (Guangdong Heng Yang electric furnace Manufacturing Co., Ltd, GW-30T; Lower same.) and vacuumize, after 700 DEG C of fusing 1.5h, proceed to spray tower (Ge Dian development zone, Hubei Province Ke Yi split Materials Co., Ltd, unidirectional throw type centrifugal spray flour mill; Lower same.) carry out centrifugal spray, centrifugal speed is 2000r/min, finally carries out cooling collection at discharging opening, chilling temperature is 53 DEG C, obtains Sn-Co composite material;
(2) the Sn-Co composite material 6g of step (1) is added in the salpeter solution of 66.6ml, 1mol/L and carry out acid treatment 5h, obtain the Sn-Co material after acid treatment;
(3) 9.3g citric acid is poured into the Sn-Co material 4.2g that adds step (2) after fully dissolving in 30ml absolute ethyl alcohol, stirred, be placed in after the dry 2h of 60 DEG C of convection oven in 50 DEG C of vacuumize 24h, obtain drying material A;
(4) the drying material A of step (3) is placed in tube furnace (high-temperature electric resistance furnace Co., Ltd of Shanghai Sigma, lower with.) in, under nitrogen protection, heat up with 3 DEG C/min, in 500 DEG C of sintering 4h, complete a carbon coated, obtain Sn-Co/C materials A; Carbon content is 10wt%;
(5) hard pitch 1.91g uniform dissolution is added after 30ml oxolane to the Sn-Co/C materials A 4.67g of step (4), stir, carry out centrifugal spray, centrifugal speed is 30000r/min, is cooled to 80 DEG C, obtains drying material B;
(6) the drying material B of step (5) is placed in to tube furnace, under nitrogen protection, heats up with 3 DEG C/min, 950 DEG C of sintering 8h, complete secondary carbon coated, obtain Sn-Co/C alloy material of cathode; Carbon content is 20wt%;
Charge-discharge test: adopting sheet-punching machine (Shenzhen industrial mould Co., Ltd) the Sn-Co/C alloy material of cathode of above-mentioned preparation to be filled into the circular sheet of diameter of phi=12mm, is pour lithium slice to electrode, and electrolyte is 1mol/LLiPF
6solution (solvent be ethylene carbonate (ethylene carbonate, EC)+dimethyl carbonate (dimethy carbonate, DMC)+methyl ethyl carbonate (Ethyl Methyl Carbonate, EMC) in mass ratio 1:1:1 configuration form.), barrier film is microporous polypropylene membrane Celgard-2300, in the glove box that is full of argon gas, be assembled into CR2430 type button cell, use new prestige battery test system, in battery charging and discharging system, carry out constant current charge-discharge test, charging and discharging currents is 0.1mA, and charging/discharging voltage scope control is between 0～2.6V;
Found that, the discharge capacity first of Sn-Co/C alloy material of cathode is 927.5mAh/g, and charging capacity is 856.4mA/g, coulomb efficiency is 92.33% first, after 30 circulations, Capacitance reserve is at 513.8mAh/g, and capability retention is 55.42%, and efficiency for charge-discharge maintains 93.41%.
Case study on implementation 2
(1) put into smelting furnace and vacuumize after the Sn powder 5.88g of 20 μ m and Co powder 0.12g are mixed, after 1000 DEG C of fusing 0.5h, proceed to spray tower and carry out centrifugal spray, centrifugal speed is 1000r/min, finally carry out cooling collection at discharging opening, chilling temperature is 10 DEG C, obtains Sn-Co composite material;
(2) the Sn-Co composite material 6g of step (1) is added in the salpeter solution of 33.3ml, 2mol/L and carry out acid treatment 3h, obtain the Sn-Co material after acid treatment;
(3) 14.82g citric acid is poured into the Sn-Co material 4.2g that adds step (2) after fully dissolving in 30ml absolute ethyl alcohol, stirred, be placed in after the dry 2h of 60 DEG C of convection oven in 90 DEG C of vacuumize 10h, obtain drying material A;
(4) the drying material A of step (3) is placed in to tube furnace, under nitrogen protection, heats up with 2 DEG C/min, 400 DEG C of sintering 5h, complete a carbon coated, obtain Sn-Co/C materials A; Carbon content is 15wt%;
(5) hard pitch 1.35g uniform dissolution is added after 30ml oxolane to the Sn-Co/C materials A 4.67g of step (4), stir, carry out centrifugal spray, centrifugal speed is 30000r/min, is cooled to 50 DEG C, obtains drying material B;
(6) the drying material B of step (5) is placed in to tube furnace, under nitrogen protection, heats up with 2 DEG C/min, 950 DEG C of sintering 10h, complete secondary carbon coated, obtain Sn-Co/C alloy material of cathode; Carbon content is 15wt%;
Charge-discharge test: operation is with embodiment 1 " charge-discharge test "; Found that, the discharge capacity first of Sn-Co/C alloy material of cathode is 954.9mAh/g, and charging capacity is 876.5mA/g, coulomb efficiency is 91.78% first, after 30 circulations, Capacitance reserve is at 526.9mAh/g, and capability retention is 54.96%, and efficiency for charge-discharge maintains 95.63%.
Case study on implementation 3
(1) put into smelting furnace and vacuumize after the Sn powder 5.88g of 100 μ m and Co powder 0.12g are mixed, after 800 DEG C of fusing 2h, proceed to spray tower and carry out centrifugal spray, centrifugal speed is 2000r/min, finally carry out cooling collection at discharging opening, chilling temperature is 100 DEG C, obtains Sn-Co composite material;
(2) the Sn-Co composite material 6g of step (1) is added in the hydrochloric acid solution of 22.2ml, 3mol/L and carry out acid treatment 2h, obtain the Sn-Co material after acid treatment;
(3) 9.3g citric acid is poured into the Sn-Co material 4.2g that adds step (2) after fully dissolving in 30ml absolute ethyl alcohol, stirred, be placed in after the dry 2h of 60 DEG C of convection oven in 60 DEG C of vacuumize 20h, obtain drying material A;
(4) the drying material A of step (3) is placed in to tube furnace, under nitrogen protection, heats up with 4 DEG C/min, 400 DEG C of sintering 5h, complete a carbon coated, obtain Sn-Co/C materials A; Carbon content is 10wt%;
(5) hard pitch 1.35g uniform dissolution is added after 30ml oxolane to the Sn-Co/C materials A 4.67g of step (4), stir, carry out centrifugal spray, centrifugal speed is 20000r/min, is cooled to 60 DEG C, obtains drying material B;
(6) the drying material B of step (5) is placed in to tube furnace, under nitrogen protection, heats up with 4 DEG C/min, 900 DEG C of sintering 12h, complete secondary carbon coated, obtain Sn-Co/C alloy material of cathode; Carbon content is 20wt%;
Charge-discharge test: operation is with embodiment 1 " charge-discharge test "; Result shows, the discharge capacity first of Sn-Co/C alloy material of cathode is 934.1mAh/g, and charging capacity is 827.6mA/g, coulomb efficiency is 88.60% first, after 30 circulations, Capacitance reserve is at 586.2mAh/g, and capability retention is 62.75%, and efficiency for charge-discharge maintains 97.76%.
Case study on implementation 4
(1) put into smelting furnace and vacuumize after the Sn powder 5.82g of 20 μ m and Co powder 0.18g are mixed, after 300 DEG C of fusing 3h, proceed to spray tower and carry out centrifugal spray, centrifugal speed is 30000r/min, finally carries out cooling collection at discharging opening, chilling temperature is 53 DEG C, obtains Sn-Co composite material;
(2) the Sn-Co composite material 6g of step (1) is added in the hydrochloric acid solution of 66.6ml, 1mol/L and carry out acid treatment 5h, obtain the Sn-Co material after acid treatment;
(3) 10.5g citric acid is poured into the Sn-Co material 4.2g that adds step (2) after fully dissolving in 30ml absolute ethyl alcohol, stirred, be placed in after the dry 2h of 60 DEG C of convection oven in 60 DEG C of vacuumize 25h, obtain drying material A;
(4) the drying material A of step (3) is placed in to tube furnace, under nitrogen protection, heats up with 3 DEG C/min, 450 DEG C of sintering 4.5h, complete a carbon coated, obtain Sn-Co/C materials A; Carbon content is 11wt%;
(5) hard pitch 1.83g uniform dissolution is added after 30ml oxolane to the Sn-Co/C materials A 4.67g of step (4), stir, carry out centrifugal spray, centrifugal speed is 30000r/min, is cooled to 120 DEG C, obtains drying material B;
(6) the drying material B of step (5) is placed in to tube furnace, under nitrogen protection, heats up with 3 DEG C/min, 1000 DEG C of sintering 8h, complete secondary carbon coated, obtain Sn-Co/C alloy material of cathode; Carbon content is 19wt%;
Charge-discharge test: operation is with embodiment 1 " charge-discharge test "; Result shows, the discharge capacity first of Sn-Co/C alloy material of cathode is 913.2mAh/g, and charging capacity is 832.4mA/g, coulomb efficiency is 91.13% first, after 30 circulations, Capacitance reserve is at 523mAh/g, and capability retention is 57.27%, and efficiency for charge-discharge maintains 87.16%.
Effect embodiment
(1) XRD detects: the lithium ion battery Sn-Co/C alloy material of cathode of by XRD being prepared by embodiment 1 detects, and result as shown in Figure 1.As can be seen from Figure 1, in lithium ion battery Sn-Co/C alloy material of cathode, taking pure tin as main, contain CoSn simultaneously
2and CoSn.
(2) SEM detects: the lithium ion battery Sn-Co/C alloy material of cathode of by SEM being prepared by embodiment 1 detects, and result as shown in Figure 2,3.As can be seen from the figure, spraying obtains spheric granules, and granularity is 1～2 μ m, carries out acid etch and occurs compared with multiple cracks on surface afterwards, is conducive to the infiltration of follow-up organic carbon, thereby improves the cycle performance of material.
(3) specific discharge capacity of lithium ion battery Sn-Co/C alloy material of cathode test: the lithium ion battery Sn-Co/C alloy material of cathode of getting embodiment 1～4 preparation carries out specific discharge capacity test, and its specific discharge capacity-cycle-index curve chart is as shown in Fig. 4～7; As we can see from the figure, the lithium ion battery Sn-Co/C alloy material of cathode first charge-discharge capacity preparing is all higher, and after 30 circulations, Capacitance reserve is in 600mAh/g left and right, and capability retention is greater than 93%.
Above-described embodiment is preferably execution mode of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (10)
1. a preparation method for lithium ion battery Sn-Co/C alloy material of cathode, is characterized in that comprising the steps:
(1) by vacuumizing after Sn powder and Co powder 97:3 in mass ratio～99:1 mixing, after 300～1000 DEG C of fusing 0.5～3h, carry out centrifugal spray, cooling, obtain Sn-Co composite material;
(2) the Sn-Co composite material of step (1) is joined in the acid solution of 1～3mol/L and carry out acid treatment, obtain the Sn-Co material after acid treatment;
(3) organic carbon source is poured into the Sn-Co material that adds step (2) after fully dissolving in absolute ethyl alcohol, stirred, dry, obtain drying material A; The Sn-Co material of step (2) and the mass ratio of organic carbon source are 1:2.2～1:3.53;
(4) the drying material A of step (3) is placed in to tube furnace, under nitrogen protection, heats up with 2～4 DEG C/min, make its carbonization in 400～500 DEG C of sintering, complete a carbon coated, obtain Sn-Co/C material;
(5) pitch uniform dissolution is added after oxolane to the Sn-Co/C material of step (4), stir, carry out centrifugal spray, be cooled to 50～120 DEG C, obtain drying material B; The Sn-Co/C material of step (4) and the mass ratio of pitch are 1:0.29～1:0.41;
(6) the drying material B of step (5) is placed in to tube furnace, under nitrogen protection, heats up with 2～4 DEG C/min, 900～1000 DEG C of sintering make its carbonization, complete secondary carbon coated, obtain Sn-Co/C alloy material of cathode.
2. the preparation method of a kind of lithium ion battery Sn-Co/C alloy material of cathode according to claim 1, is characterized in that: the Sn powder described in step (1) is the Sn powder of diameter 10～100 μ m; Described Co powder is the Co powder of diameter 10～100 μ m.
3. the preparation method of a kind of lithium ion battery Sn-Co/C alloy material of cathode according to claim 1, it is characterized in that: the centrifugal spray described in step (1) carries out in spray tower, the centrifugal speed of described spray tower is 1000～30000r/min.
4. the preparation method of a kind of lithium ion battery Sn-Co/C alloy material of cathode according to claim 1, is characterized in that: the cooling temperature described in step (1) is 10～100 DEG C.
5. the preparation method of a kind of lithium ion battery Sn-Co/C alloy material of cathode according to claim 1, is characterized in that: the mass volume ratio of the Sn-Co composite material described in step (2) and acid solution is 1g/3.7ml～1g/11.1ml.
6. the preparation method of a kind of lithium ion battery Sn-Co/C alloy material of cathode according to claim 1, is characterized in that: the acid solution described in step (2) is aqueous acid; Described acid is nitric acid, sulfuric acid or hydrochloric acid; The described acid-treated time is 2～5h.
7. the preparation method of a kind of lithium ion battery Sn-Co/C alloy material of cathode according to claim 1, it is characterized in that: the organic carbon source described in step (3) is citric acid, glucose or sucrose, described organic carbon source and the mass volume ratio of absolute ethyl alcohol are 1g/2.02ml～1g/3.23ml.
8. the preparation method of a kind of lithium ion battery Sn-Co/C alloy material of cathode according to claim 1, is characterized in that: the dry employing following methods described in step (3) carries out: 50～90 DEG C of vacuumize 10～25h after 60 DEG C of forced air drying 2h.
9. the preparation method of a kind of lithium ion battery Sn-Co/C alloy material of cathode according to claim 1, is characterized in that:
The time of the sintering described in step (4) is 4～5h, and the described coated carbon content of a carbon is 10～15wt%;
In step (5), selected pitch is hard pitch or mid temperature pitch, and described pitch and the mass volume ratio of oxolane are 1g/15.5ml～1g/22.2ml;
The time of the sintering described in step (6) is 8～12h, and the coated carbon content of described secondary carbon is 15～20wt%.
10. a lithium ion battery Sn-Co/C alloy material of cathode, is characterized in that: obtained by the preparation method described in claim 1～9 any one.
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| CN103346293B (en) * | 2013-06-28 | 2015-11-25 | 中国科学院宁波材料技术与工程研究所 | Lithium ion battery cathode material and its preparation method, lithium ion battery |
| CN103779545B (en) * | 2014-01-11 | 2015-11-18 | 福州大学 | A kind of Sn-Co-mesoporous carbon complex and its preparation method and application |
| CN107017384A (en) * | 2016-01-27 | 2017-08-04 | 陕西煤业化工技术研究院有限责任公司 | A kind of preparation method of silicon-carbon composite cathode material |
| CN108493437B (en) * | 2018-03-19 | 2020-11-24 | 福建翔丰华新能源材料有限公司 | Method for preparing tin-carbon lithium ion negative electrode material |
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| CN1492525A (en) * | 1998-09-18 | 2004-04-28 | ������������ʽ���� | Electrode material, electrode structure body, lithium secondary cell and method for producing them |
| CN1964109A (en) * | 2004-11-08 | 2007-05-16 | 索尼株式会社 | Anode active material and battery using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1492525A (en) * | 1998-09-18 | 2004-04-28 | ������������ʽ���� | Electrode material, electrode structure body, lithium secondary cell and method for producing them |
| CN1964109A (en) * | 2004-11-08 | 2007-05-16 | 索尼株式会社 | Anode active material and battery using the same |
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