CN1397598A - Process for preparing carbon coated graphite microparticles - Google Patents
Process for preparing carbon coated graphite microparticles Download PDFInfo
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- CN1397598A CN1397598A CN 02125715 CN02125715A CN1397598A CN 1397598 A CN1397598 A CN 1397598A CN 02125715 CN02125715 CN 02125715 CN 02125715 A CN02125715 A CN 02125715A CN 1397598 A CN1397598 A CN 1397598A
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- graphite microparticles
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- coated graphite
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Abstract
A process for preparing carbon coated graphite microparticles used as negative electrode material of Li-ion battery features use of spray granulating method. It can elongate the service life of Li-ion battery.
Description
Technical field
The invention belongs to battery terminal material preparation technology scope, particularly as the good cycling stability of lithium ion battery negative material, the preparation method of a kind of carbon coated graphite microparticles that can in containing electricity Jie solution of propylene carbonate fat (PC), use.
Background technology
Because advantages such as it is low that graphite material has charging and discharging lithium battery voltage, and charge and discharge platform is long, and cycle life is good, it is as lithium ion battery anode material commercialization.But because small-molecule substances such as electrolytic solution are inserted altogether, graphite expansion and contraction cause graphite flake layer to come off, and make irreversible capacity bigger, and cycle life reduces.Graphite can not use in PC (propene carbonate) electrolytic solution, and PC is the more satisfactory electrolytic solution of lithium ion battery as electrolytic solution, and then graphite is used in lithium ion battery and is restricted.
Summary of the invention
The purpose of this invention is to provide a kind of preparation method who is used as the carbon coated graphite microparticles of lithium ion battery negative material, it is characterized in that: adopt the method for mist projection granulating to prepare coated graphite microparticles, earlier graphite microparticles and resin that is used as coating layer and ethanol are mixed formation suspension with volume ratio at 1: 1: 1, the suspension for preparing is sprayed droplet with high speed, the atomizing granulation disperses, the resin liquid flow constriction of fluidised form, coated graphite microparticles, form coating graphite, the composite micro-powder that mist projection granulating is obtained, in warm air, after the drying, do charing through 700-1200 ℃ again and handle, obtain the graphite microparticles that charcoal coats.
Described graphite microparticles can be natural micro crystal graphite, crystalline flake graphite or electrographite.
Described graphite microparticles makes its shape as far as possible near spherical through shaping, and granularity is between 5-40 μ m.
The resin of described coating layer is a kind of in resol, Resins, epoxy, the alditol resin.
The invention has the beneficial effects as follows that carbon coated graphite can upward reduce the irreversible capacity first of graphite largely, improve cyclical stability, kept low to charging and discharging lithium battery voltage, charge and discharge platform is long, the advantage that cycle life is good.Carbon coated graphite can use in containing the electrolytic solution of PC, and graphite is used in lithium ion battery and opened up new way.
Description of drawings
Fig. 1 is the synoptic diagram of carbon coated graphite microparticles preparation;
Fig. 2 is the electromicroscopic photograph figure of carbon coated graphite microparticles;
Fig. 3 is the structure synoptic diagram of carbon coated graphite microparticles.
Embodiment
The present invention is the preparation method as the carbon coated graphite microparticles of lithium ion battery negative material, Figure 1 shows that the synoptic diagram of carbon coated graphite microparticles preparation.Adopt the method for mist projection granulating to prepare carbon coated graphite microparticles, earlier graphite microparticles and resin that is used as the charcoal coating layer and ethanol are mixed formation suspension with volume ratio at 1: 1: 1, the suspension for preparing is sprayed droplet at a high speed, the atomizing granulation disperses, in this process, because the effect of surface energy, the resin liquid of fluidised form is with flow constriction, coated graphite microparticles, form coating graphite, the composite micro-powder that mist projection granulating is obtained then is in warm air after the drying, do charing through 700-1200 ℃ again and handle, obtain the graphite microparticles (as shown in Figure 2) that charcoal coats.The resin of used coating layer is resol, Resins, epoxy or alditol resin.Above-mentioned graphite microparticles is natural micro crystal graphite (also being called amorphous graphite or amorphous graphite), crystalline flake graphite, electrographite etc.; These graphite microparticles are through making its shape as far as possible near spherical (shown in Fig. 3 metallograph) after the shaping, granularity is between 5-40 μ m.
Claims (4)
1. the preparation method of a carbon coated graphite microparticles, it is characterized in that: adopt the method for mist projection granulating to prepare coated graphite microparticles, earlier graphite microparticles and resin that is used as coating layer and ethanol are mixed formation suspension with volume ratio at 1: 1: 1, the suspension for preparing is sprayed droplet with high speed, the atomizing granulation disperses, the resin liquid flow constriction of fluidised form, coated graphite microparticles, form coating graphite, the composite micro-powder that mist projection granulating is obtained, in warm air, after the drying, do charing through 700-1200 ℃ again and handle, obtain the graphite microparticles that charcoal coats.
2. according to the preparation method of the described carbon coated graphite microparticles of claim 1, it is characterized in that: described graphite microparticles can be natural micro crystal graphite, crystalline flake graphite or electrographite.
3. according to the preparation method of the described carbon coated graphite microparticles of claim 1, it is characterized in that: described graphite microparticles makes its shape as far as possible near spherical through shaping, and granularity is between 5-40 μ m.
4. according to the preparation method of the described carbon coated graphite microparticles of claim 1, it is characterized in that: the resin of described coating layer is a kind of in resol, Resins, epoxy, the alditol resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 02125715 CN1222579C (en) | 2002-08-14 | 2002-08-14 | Process for preparing carbon coated graphite microparticles |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02125715 CN1222579C (en) | 2002-08-14 | 2002-08-14 | Process for preparing carbon coated graphite microparticles |
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| CN1397598A true CN1397598A (en) | 2003-02-19 |
| CN1222579C CN1222579C (en) | 2005-10-12 |
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| CN 02125715 Expired - Fee Related CN1222579C (en) | 2002-08-14 | 2002-08-14 | Process for preparing carbon coated graphite microparticles |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522561A (en) * | 2011-12-21 | 2012-06-27 | 清华大学 | Lithium ion battery cathode material and preparation method thereof |
| CN102610795A (en) * | 2011-01-20 | 2012-07-25 | 宁波宏远炭素工业有限公司 | Preparation method of lithium ion battery carbon cathode material coating layer |
| CN102891297A (en) * | 2012-11-10 | 2013-01-23 | 江西正拓新能源科技有限公司 | Silicon-carbon composite material for lithium ion battery and preparation method thereof |
| CN102945951A (en) * | 2012-11-28 | 2013-02-27 | 深圳市雄韬电源科技股份有限公司 | Preparation of lead carbon composite material and method manufacturing lead carbon batteries by utilizing material |
| CN103311517A (en) * | 2012-03-07 | 2013-09-18 | 上海杉杉科技有限公司 | TiO2-coated graphite composite particle for lithium ion battery, and preparation method and application thereof |
| CN101087021B (en) * | 2007-07-18 | 2014-04-30 | 深圳市贝特瑞新能源材料股份有限公司 | Man-made graphite cathode material for lithium ion battery and its making method |
| CN108010726A (en) * | 2016-11-01 | 2018-05-08 | 东莞市东阳光电容器有限公司 | A kind of ultracapacitor nucleocapsid porous electrode material and preparation method thereof |
| CN108275673A (en) * | 2018-04-07 | 2018-07-13 | 蒋黎婷 | A kind of preparation method of high-performance porous graphene film |
| CN108598478A (en) * | 2018-04-25 | 2018-09-28 | 北方奥钛纳米技术有限公司 | Modified graphite preparation method and modified graphite |
| CN108630940A (en) * | 2017-03-24 | 2018-10-09 | 宁波杉杉新材料科技有限公司 | A kind of preparation method of high power capacity natural graphite negative electrode material |
| CN109616638A (en) * | 2018-12-05 | 2019-04-12 | 中南大学 | Spherical core-shell structure mixed graphite @ hard carbon composite material and preparation method and application thereof |
| CN110797513A (en) * | 2018-08-03 | 2020-02-14 | 天津大学 | Graphite-hard carbon coated material and preparation method thereof |
| CN111224104A (en) * | 2020-02-21 | 2020-06-02 | 超威电源集团有限公司 | Carbon composite material, paste, battery and preparation method |
-
2002
- 2002-08-14 CN CN 02125715 patent/CN1222579C/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101087021B (en) * | 2007-07-18 | 2014-04-30 | 深圳市贝特瑞新能源材料股份有限公司 | Man-made graphite cathode material for lithium ion battery and its making method |
| CN102610795A (en) * | 2011-01-20 | 2012-07-25 | 宁波宏远炭素工业有限公司 | Preparation method of lithium ion battery carbon cathode material coating layer |
| CN102610795B (en) * | 2011-01-20 | 2016-04-27 | 宁波宏远炭素工业有限公司 | A kind of preparation method of carbon negative electrode material of lithium ion cell coating layer |
| CN102522561A (en) * | 2011-12-21 | 2012-06-27 | 清华大学 | Lithium ion battery cathode material and preparation method thereof |
| CN103311517A (en) * | 2012-03-07 | 2013-09-18 | 上海杉杉科技有限公司 | TiO2-coated graphite composite particle for lithium ion battery, and preparation method and application thereof |
| CN102891297A (en) * | 2012-11-10 | 2013-01-23 | 江西正拓新能源科技有限公司 | Silicon-carbon composite material for lithium ion battery and preparation method thereof |
| CN102891297B (en) * | 2012-11-10 | 2015-05-13 | 江西正拓新能源科技股份有限公司 | Silicon-carbon composite material for lithium ion battery and preparation method thereof |
| CN102945951A (en) * | 2012-11-28 | 2013-02-27 | 深圳市雄韬电源科技股份有限公司 | Preparation of lead carbon composite material and method manufacturing lead carbon batteries by utilizing material |
| CN108010726A (en) * | 2016-11-01 | 2018-05-08 | 东莞市东阳光电容器有限公司 | A kind of ultracapacitor nucleocapsid porous electrode material and preparation method thereof |
| CN108630940A (en) * | 2017-03-24 | 2018-10-09 | 宁波杉杉新材料科技有限公司 | A kind of preparation method of high power capacity natural graphite negative electrode material |
| CN108630940B (en) * | 2017-03-24 | 2021-07-13 | 宁波杉杉新材料科技有限公司 | Preparation method of high-capacity natural graphite negative electrode material |
| CN108275673A (en) * | 2018-04-07 | 2018-07-13 | 蒋黎婷 | A kind of preparation method of high-performance porous graphene film |
| CN108598478A (en) * | 2018-04-25 | 2018-09-28 | 北方奥钛纳米技术有限公司 | Modified graphite preparation method and modified graphite |
| CN110797513A (en) * | 2018-08-03 | 2020-02-14 | 天津大学 | Graphite-hard carbon coated material and preparation method thereof |
| CN110797513B (en) * | 2018-08-03 | 2022-04-05 | 天津大学 | Graphite-hard carbon coated material and preparation method thereof |
| CN109616638A (en) * | 2018-12-05 | 2019-04-12 | 中南大学 | Spherical core-shell structure mixed graphite @ hard carbon composite material and preparation method and application thereof |
| CN111224104A (en) * | 2020-02-21 | 2020-06-02 | 超威电源集团有限公司 | Carbon composite material, paste, battery and preparation method |
| CN111224104B (en) * | 2020-02-21 | 2021-08-10 | 超威电源集团有限公司 | Carbon composite material, paste, battery and preparation method |
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| Publication number | Publication date |
|---|---|
| CN1222579C (en) | 2005-10-12 |
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