CN102683705A - Lithium-titanate-coated modified graphite composite anode material, and preparation method and application thereof - Google Patents
Lithium-titanate-coated modified graphite composite anode material, and preparation method and application thereof Download PDFInfo
- Publication number
- CN102683705A CN102683705A CN201210124713XA CN201210124713A CN102683705A CN 102683705 A CN102683705 A CN 102683705A CN 201210124713X A CN201210124713X A CN 201210124713XA CN 201210124713 A CN201210124713 A CN 201210124713A CN 102683705 A CN102683705 A CN 102683705A
- Authority
- CN
- China
- Prior art keywords
- graphite
- lithium
- lithium titanate
- carbon
- silicon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- 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 lithium-titanate-coated modified graphite composite anode material and a preparation method thereof. The method comprises the following steps of: respectively preparing a lithium-source anhydrous ethanol solution and a titanium-source anhydrous ethanol solution in containers; mixing the lithium-source anhydrous ethanol solution and the titanium-source anhydrous ethanol solution, and fully stirring the obtained mixture; adding graphite into the mixture in batches, and then adding a small amount of deionized water into the mixture; stirring the obtained sol, so that the sol gradually becomes a black gel; carrying out aging and drying on the black gel so as to obtain a precursor; and carrying out heat treatment on the precursor under inert atmosphere conditions so as to obtain a lithium-titanate-coated modified graphite composite anode material. The lithium-titanate-coated modified graphite composite anode material disclosed by the invention has the characteristics of simple process, uniform material particles, high specific capacity, and capability of obviously improving the initial coulomb efficiency.
Description
Technical field:
The present invention relates to the lithium ion battery negative material field, be specifically related to a kind of composite cathode material of silicon/carbon/graphite and preparation method and application thereof of lithium titanate coating modification.
Background technology:
Lithium ion battery is at present with one of hottest point of becoming the research and development of new-type secondary chemical cell field of power supplies; Compare with conventional batteries have that average discharge volt is higher, volume and capacity ratio and advantages such as specific discharge capacity is bigger, sustainable good cycle; Performance of lithium-ion secondary battery quality mainly depend on its anode and cathode active materials, at present the negative material of commercial applications mainly is the graphite-like negative pole.Advantages such as graphite is cheap with it, wide material sources, good conductivity are considered to up-and-coming lithium ion battery negative material; Graphite is more with its electronegative potential platform, higher specific capacity, good voltage platform; Conductivity preferably, no-voltage hysteresis etc. is paid close attention to by industrial circle.
But also there is shortcoming in it, and is very approaching like the current potential of the current potential of carbon negative pole and lithium, and during over-charging of battery, lithium metal possibly separated out and causes safety problem in carbon electrodes, and the speed that releases energy is fast inadequately, needing to be not suitable for the equipment of moment heavy current.And the carbon negative pole material collector adopted copper material, cross when battery and put or during antipole, because the rising of negative pole current potential causes the collector oxidation dissolution, and the destruction of SEI film, the damage battery performance.Therefore, graphite cathode material is carried out modification, the defective of himself is remedied, thereby can be applied to lithium cell cathode material widely, must bring more remarkable economic efficiency and environmental benefit to this type shortcoming.
Is a zero-strain lithium titanate anode material, good cycle performance; has a good charge and discharge platform; theoretical capacity is also 175mAh / g, the actual specific capacity can reach 160mAh / g or so, and the capacity is mostly concentrated in the platform area ; lithium titanate anode material does not react with the electrolyte, easy to prepare.Lithium titanate anode material is compared with graphite cathode material has better chemical property and fail safe usually, utilizes lithium titanate anode material to come modified graphite as the compound lithium ion negative material, gives full play to two kinds of properties of materials, should be thing highly significant.
Summary of the invention
Order of the present invention provides composite cathode material of silicon/carbon/graphite of a kind of lithium titanate coating modification and preparation method thereof.Gentle, the easy operating of reaction condition when gained modified graphite cathode material of the present invention has specific capacity height, the high advantage of enclosed pasture efficient, and preparation first.
The technical solution adopted for the present invention to solve the technical problems mainly may further comprise the steps:
A kind of composite cathode material of silicon/carbon/graphite of lithium titanate coating modification is characterized in that: described composite negative pole material is formed by lithium titanate and graphite sintering, and the mass ratio of lithium titanate and graphite is (3-9): (91-97).
The preparation method of the composite cathode material of silicon/carbon/graphite of described lithium titanate coating modification is characterized in that, specifically may further comprise the steps:
1) presses Li:Ti=(0.8-0.84): 1 stoichiometric proportion, the alcohol mixed solution in preparation lithium source and titanium source;
2) under continuous condition of stirring, graphite is joined in step (1) mixed solution in batches, stir after 18-22 minute; Being added dropwise to proper amount of deionized water again, is under the 30-40 ℃ of condition in temperature, continues to stir 3-5 hour; When black colloidal sol becomes the black gel gradually, stop to stir, let gel ageing 10-14 hour; Place then in the vacuum drying chamber, under 75-85 ℃, carry out drying, promptly obtain the presoma xerogel; Wherein, the mass ratio of lithium titanate and graphite is (3-9): (91-97);
3) the presoma xerogel of step (2) gained is after broken, ball milling and simple compaction treatment, in inert atmosphere under 700 ~ 900 ℃ of conditions heat preservation sintering 10-24 hour, obtains the composite cathode material of silicon/carbon/graphite of lithium titanate coating modification.
The preparation method of the composite cathode material of silicon/carbon/graphite of described lithium titanate coating modification is characterized in that: said lithium source is one or more the mixture in solid metal lithium, lithium acetate or the lithium nitrate.
The preparation method of the composite cathode material of silicon/carbon/graphite of described lithium titanate coating modification is characterized in that: said titanium source is butyl titanate or tetrabromo-isopropyl phthalate.
The preparation method of the composite cathode material of silicon/carbon/graphite of described lithium titanate coating modification is characterized in that: the described graphite of step (2) is any one in the existing graphite cathode product.
The preparation method of the composite cathode material of silicon/carbon/graphite of described lithium titanate coating modification is characterized in that: the inert atmosphere described in the step (2) is selected from one or more mixing in nitrogen, argon gas or the helium.
The purposes of the composite cathode material of silicon/carbon/graphite of lithium titanate coating modification as claimed in claim 1 is characterized in that: the composite cathode material of silicon/carbon/graphite of described lithium titanate coating modification is applied to various portable electric appts and the required lithium ion battery of various electric motor car.
The present invention is with the advantage of existing graphite modified compared with techniques:
1, proposed first to come modified graphite cathode material with lithium titanate anode material; This modification is not only the simple mixing of two metasystems; But begin through the raw material of sol-gel process from synthetic lithium titanate; Press special formulation and finally form layer of even lithium titanate coating layer on the surface of graphite; Make final gained composite material all have the different current potentials that discharges and recharges, two platforms occur, can more effectively observe the trend of volume change in the charge and discharge process because the coating of lithium titanate discharges and recharges graphite with simple lithium titanate and graphite;
2, also make the efficient of enclosed pasture first of graphite cathode obtain large increase simultaneously;
3, the multiple material of gained can be applied to various portable electric appts and the required lithium ion battery of various electric motor car widely.
Below in conjunction with accompanying drawing with implement example to further explain of the present invention.
Description of drawings:
Accompanying drawing 1 is the stereoscan photograph of embodiment 2 gained lithium titanate modified graphite cathode materials.
Accompanying drawing 2 is a comparative example experimental selection graphite sample charging and discharging curve.
Accompanying drawing 3 is the first charge-discharge curve of embodiment 2 gained lithium titanate modified graphite cathode materials.
Embodiment:
Embodiment 1:
Be dissolved in the ethanol for the ratio of Li:Ti=0.80:1 takes by weighing solid-state lithium 0.125g in molar ratio, take by weighing again the 6.19g tetraisopropyl titanate by volume 1:5 be dissolved in the ethanol.Constantly under the stirring condition mixing two kinds of solution.
Getting 20g graphite constantly join in the above-mentioned mixed solution under the condition of stirring in batches, stir and drip the 8ml deionized water again after 20 minutes, is under the 30-40 ℃ of condition in temperature; Continue to stir 4 hours; Black colloidal sol becomes the black gel gradually, gel through ageing in 12 hours after, place in the vacuum drying chamber; Under 80 ℃ of conditions, carry out drying, promptly obtain the presoma xerogel.After grinding, put into tube furnace, feed nitrogen protection, be warmed up to 750 ℃ of heat preservation sinterings 10 hours, promptly obtain the composite cathode material of silicon/carbon/graphite of lithium titanate coating modification.
The gained modified graphite prepares electrode as follows: is that the ratio of 92:5:3 is prepared into electrode to modified graphite sample, binding agent, conductive agent in mass ratio; With lithium as to electrode; Do electrolyte with 1M-LiPF6 EC/EMC solution, microporous polypropylene membrane is a barrier film, is assembled into button cell.And left standstill 6 hours.Battery is placed on and carries out electric performance test on the LAND tester after will leaving standstill, and carries out the constant current charge-discharge experiment with the current density of 0.1C, and test charging/discharging voltage scope is 0.005V ~ 2.5V.The modified graphite that present embodiment obtains, its first discharge capacity be 354mAh/g, the initial charge capacity is 290 mAh/g, first the enclosed pasture efficient be 81.9%.
Embodiment 2:
Be dissolved in the ethanol for the ratio of Li:Ti=0.82:1 takes by weighing solid-state lithium 0.127g in molar ratio, take by weighing again the 6.19g tetraisopropyl titanate by volume 1:5 be dissolved in the ethanol.Constantly under the stirring condition mixing two kinds of solution.
Take by weighing graphite 20g,, stir and drip the 8ml deionized water again after 20 minutes constantly add in the above-mentioned solution under the condition of stirring in batches; In temperature is under the 30-40 ℃ of condition, continues to stir 4 hours, and black colloidal sol becomes the black gel gradually; Gel through ageing in 12 hours after; Place in the vacuum drying chamber, under 80 ℃ of conditions, carry out drying, promptly obtain the presoma xerogel.After grinding, put into tube furnace, feed nitrogen protection, be warmed up to 850 ℃ of heat preservation sinterings 12 hours.Promptly obtain the composite cathode material of silicon/carbon/graphite of lithium titanate coating modification.
The gained modified graphite prepares electrode by method identical among the embodiment 1, its first discharge capacity be 373.2mAh/g, the initial charge capacity is 322 mAh/g, first the enclosed pasture efficient be 86.3%
Embodiment 3:
Be dissolved in the ethanol for the ratio of Li:Ti=0.84:1 takes by weighing solid-state lithium 0.131g in molar ratio, take by weighing again the 6.19g tetraisopropyl titanate by volume 1:5 be dissolved in the ethanol.Constantly under the stirring condition mixing two kinds of solution.
Take by weighing graphite 20g,, stir and drip the 8ml deionized water again after 20 minutes constantly add in the above-mentioned solution under the condition of stirring in batches; In temperature is under the 30-40 ℃ of condition, continues to stir 4 hours, and black colloidal sol becomes the black gel gradually; Gel through ageing in 12 hours after; Place in the vacuum drying chamber, under 80 ℃ of conditions, carry out drying, promptly obtain the presoma xerogel.After grinding, put into tube furnace, feed under the nitrogen protection, be warmed up to 900 ℃ of heat preservation sinterings 16 hours.Promptly obtain the composite cathode material of silicon/carbon/graphite of lithium titanate coating modification.
The gained modified graphite prepares electrode by method identical among the embodiment 1, its first discharge capacity be 362mAh/g, the initial charge capacity is 303 mAh/g, first the enclosed pasture efficient be 83.7%
Embodiment 4:
Be dissolved in the ethanol for the ratio of Li:Ti=0.82:1 takes by weighing anhydrous lithium acetate 1.207 in molar ratio, take by weighing again the 6.19g tetraisopropyl titanate by volume 1:5 be dissolved in the ethanol.Constantly under the stirring condition mixing two kinds of solution.
Take by weighing graphite 20g,, stir and drip 15ml acetic acid again after 20 minutes constantly add in the above-mentioned solution under the condition of stirring in batches; In temperature is under the 30-40 ℃ of condition, continues to stir 4 hours, and black colloidal sol becomes the black gel gradually; Gel through ageing in 12 hours after; Place in the vacuum drying chamber, under 80 ℃ of conditions, carry out drying, promptly obtain the presoma xerogel.After grinding, put into tube furnace, feed nitrogen protection, be warmed up to 850 ℃ of heat preservation sinterings 10 hours.Promptly obtain the composite cathode material of silicon/carbon/graphite of lithium titanate coating modification.
The gained modified graphite prepares electrode by method identical among the embodiment 1, its first discharge capacity be 354mAh/g, the initial charge capacity is 293 mAh/g, first the enclosed pasture efficient be 82.8%
Embodiment 5:
Be dissolved in the ethanol for the ratio of Li:Ti=0.82:1 takes by weighing solid-state lithium 0.127g in molar ratio, take by weighing again the 7.41g butyl titanate by volume 1:5 be dissolved in the ethanol.Constantly under the stirring condition mixing two kinds of solution.
Take by weighing graphite 20g,, stir and drip the 8ml deionized water again after 20 minutes constantly add in the above-mentioned solution under the condition of stirring in batches; In temperature is under the 30-40 ℃ of condition, continues to stir 4 hours, and black colloidal sol becomes the black gel gradually; Gel through ageing in 12 hours after; Place in the vacuum drying chamber, under 80 ℃ of conditions, carry out drying, promptly obtain the presoma xerogel.After grinding, put into tube furnace, feed nitrogen protection, be warmed up to 850 ℃ of heat preservation sinterings 10 hours.Promptly obtain the composite cathode material of silicon/carbon/graphite of lithium titanate coating modification.
The gained modified graphite prepares electrode by method identical among the embodiment 1, its first discharge capacity be 352mAh/g, the initial charge capacity is 291 mAh/g, first the enclosed pasture efficient be 82.6%.
Comparative example:
Take by weighing that selected graphite prepares electrode by method identical among the embodiment 1 among each embodiment, its first discharge capacity be 333mAh/g, the initial charge capacity is 264 mAh/g, enclosed pasture efficient is 79.3% first.
Relatively can find through each embodiment and comparative example gained graphite cathode material performance; The modification scheme of utilizing the present invention to propose; Finally through specific embodiment gained modified graphite cathode material in specific capacity, still enclosed pasture efficient all shows more superior performance first; And each embodiment gained modified graphite cathode material all has obvious platform to occur at the 1.5V place, also makes final gained modified graphite cathode material charge and discharge coulomb efficient and is significantly increased.
Claims (5)
1. the composite cathode material of silicon/carbon/graphite of a lithium titanate coating modification, it is characterized in that: described composite negative pole material is formed by lithium titanate and graphite sintering, and the mass ratio of lithium titanate and graphite is (3-9): (91-97).
2. the preparation method of the composite cathode material of silicon/carbon/graphite of lithium titanate coating modification as claimed in claim 1 is characterized in that, specifically may further comprise the steps:
Press Li:Ti=(0.8-0.84): 1 stoichiometric proportion, the alcohol mixed solution in preparation lithium source and titanium source; Said lithium source is one or more the mixture in solid metal lithium, lithium acetate or the lithium nitrate; Said titanium source is butyl titanate or tetrabromo-isopropyl phthalate;
Under continuous condition of stirring, graphite is joined in step (1) mixed solution in batches, stir after 18-22 minute, be added dropwise to proper amount of deionized water again; In temperature is under the 30-40 ℃ of condition, continues to stir 3-5 hour, when black colloidal sol becomes the black gel gradually, stops to stir; Let gel ageing 10-14 hour, place then in the vacuum drying chamber, under 75-85 ℃, carry out drying; Promptly obtain the presoma xerogel, wherein, the mass ratio of lithium titanate and graphite is (3-9): (91-97);
The presoma xerogel of step (2) gained in inert atmosphere under 700 ~ 900 ℃ of conditions heat preservation sintering 10-24 hour, obtains the composite cathode material of silicon/carbon/graphite of lithium titanate coating modification after broken, ball milling and simple compaction treatment.
3. the preparation method of the composite cathode material of silicon/carbon/graphite of lithium titanate coating modification according to claim 2 is characterized in that: the described graphite of step (2) is any one in the existing graphite cathode product.
4. the preparation method of the composite cathode material of silicon/carbon/graphite of lithium titanate coating modification according to claim 2 is characterized in that: the inert atmosphere described in the step (2) is selected from one or more mixing in nitrogen, argon gas or the helium.
5. the application of the composite cathode material of silicon/carbon/graphite of lithium titanate coating modification as claimed in claim 1 is characterized in that: the composite cathode material of silicon/carbon/graphite of described lithium titanate coating modification can be applied to various portable electric appts and the required lithium ion battery of various electric motor car.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210124713XA CN102683705A (en) | 2012-04-24 | 2012-04-24 | Lithium-titanate-coated modified graphite composite anode material, and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210124713XA CN102683705A (en) | 2012-04-24 | 2012-04-24 | Lithium-titanate-coated modified graphite composite anode material, and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102683705A true CN102683705A (en) | 2012-09-19 |
Family
ID=46815314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210124713XA Pending CN102683705A (en) | 2012-04-24 | 2012-04-24 | Lithium-titanate-coated modified graphite composite anode material, and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102683705A (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103151521A (en) * | 2013-02-22 | 2013-06-12 | 中国科学院过程工程研究所 | Positive electrode material of lithium ion battery and preparing method thereof |
| CN103682295A (en) * | 2012-09-26 | 2014-03-26 | 华为技术有限公司 | Lithium ion battery negative electrode material and preparation method thereof as well as lithium ion battery negative electrode plate and lithium ion battery |
| WO2014048098A1 (en) * | 2012-09-26 | 2014-04-03 | 华为技术有限公司 | Composite negative electrode material for lithium ion battery, preparation method thereof and lithium ion battery |
| CN104091937A (en) * | 2014-07-18 | 2014-10-08 | 深圳市振华新材料股份有限公司 | Lithium titanate-coated surface-treated graphite negative electrode material, preparation method and application of negative electrode material |
| CN104393235A (en) * | 2014-04-21 | 2015-03-04 | 天津锦美碳材科技发展有限公司 | Lithium-salt-modified lithium ion battery anode material and preparation method thereof |
| CN104577095A (en) * | 2015-01-30 | 2015-04-29 | 湖南杉杉新能源有限公司 | Embedded nano-compound coated modified cathode material for lithium ion battery and preparation method of cathode material |
| CN104681860A (en) * | 2015-02-09 | 2015-06-03 | 惠州市豪鹏科技有限公司 | Quick charging and discharging type high voltage lithium ion battery and preparation method thereof |
| CN105140501A (en) * | 2015-07-06 | 2015-12-09 | 新乡远东电子科技有限公司 | Lithium titanate-coated graphite composite material and preparation method thereof |
| WO2016206548A1 (en) * | 2015-06-26 | 2016-12-29 | 田东 | Preparation method for lithium battery high-voltage modified negative electrode material |
| CN106374093A (en) * | 2016-11-07 | 2017-02-01 | 珠海格力电器股份有限公司 | Graphite composite material, preparation method and application thereof |
| CN107959012A (en) * | 2017-11-17 | 2018-04-24 | 力信（江苏）能源科技有限责任公司 | A kind of individual layer/double-coating Si oxide composite negative pole material and preparation method thereof |
| CN108232175A (en) * | 2018-02-06 | 2018-06-29 | 安徽科达铂锐能源科技有限公司 | A kind of lithium ion battery graphite/lithium titanate composite anode material and preparation method |
| CN109888229A (en) * | 2019-03-01 | 2019-06-14 | 中山市华舜科技有限责任公司 | A kind of preparation method of the lithium ion battery negative material based on lithium titanate coated graphite composite material |
| CN111682183A (en) * | 2020-06-22 | 2020-09-18 | 贝特瑞新材料集团股份有限公司 | Multi-element composite negative electrode material, preparation method thereof and lithium ion battery |
| CN112687874A (en) * | 2020-12-28 | 2021-04-20 | 萝北奥星新材料有限公司 | High-stability lithium battery negative electrode material and application thereof |
| CN113363444A (en) * | 2021-06-15 | 2021-09-07 | 广东凯金新能源科技股份有限公司 | Nano lithium titanate-coated modified graphite negative electrode material, and preparation method and application thereof |
| CN114655951A (en) * | 2022-04-17 | 2022-06-24 | 晖阳(贵州)新能源材料有限公司 | Preparation method of lithium ion battery negative electrode material |
| CN116217245A (en) * | 2023-02-14 | 2023-06-06 | 西北工业大学 | In-situ synthesis of Hf x Ta 1-x C solid solution coated graphite particle powder and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101794876A (en) * | 2010-03-19 | 2010-08-04 | 常州康维电子科技有限公司 | Cathode material of battery with high rate performance and preparation method thereof |
| CN101859890A (en) * | 2010-06-21 | 2010-10-13 | 惠州市赛能电池有限公司 | Anode material of lithium ion battery |
| CN101867036A (en) * | 2010-05-27 | 2010-10-20 | 苏州阿特斯阳光电力科技有限公司 | Lithium-ion battery cathode material with long service life and high power as well as preparation method thereof |
| CN101877405A (en) * | 2010-04-20 | 2010-11-03 | 华南理工大学 | Preparation method of lithium titanate-graphene combination electrode material |
| CN102412390A (en) * | 2011-10-12 | 2012-04-11 | 路密 | Preparation method of Li4Ti5O12 wrapped natural graphite for lithium ion battery cathode |
-
2012
- 2012-04-24 CN CN201210124713XA patent/CN102683705A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101794876A (en) * | 2010-03-19 | 2010-08-04 | 常州康维电子科技有限公司 | Cathode material of battery with high rate performance and preparation method thereof |
| CN101877405A (en) * | 2010-04-20 | 2010-11-03 | 华南理工大学 | Preparation method of lithium titanate-graphene combination electrode material |
| CN101867036A (en) * | 2010-05-27 | 2010-10-20 | 苏州阿特斯阳光电力科技有限公司 | Lithium-ion battery cathode material with long service life and high power as well as preparation method thereof |
| CN101859890A (en) * | 2010-06-21 | 2010-10-13 | 惠州市赛能电池有限公司 | Anode material of lithium ion battery |
| CN102412390A (en) * | 2011-10-12 | 2012-04-11 | 路密 | Preparation method of Li4Ti5O12 wrapped natural graphite for lithium ion battery cathode |
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103682295A (en) * | 2012-09-26 | 2014-03-26 | 华为技术有限公司 | Lithium ion battery negative electrode material and preparation method thereof as well as lithium ion battery negative electrode plate and lithium ion battery |
| WO2014048098A1 (en) * | 2012-09-26 | 2014-04-03 | 华为技术有限公司 | Composite negative electrode material for lithium ion battery, preparation method thereof and lithium ion battery |
| CN103682295B (en) * | 2012-09-26 | 2016-03-02 | 华为技术有限公司 | A kind of lithium ion battery cathode material and its preparation method, anode plate for lithium ionic cell and lithium ion battery |
| CN103151521B (en) * | 2013-02-22 | 2015-12-23 | 中国科学院过程工程研究所 | A kind of anode material for lithium-ion batteries and preparation method thereof |
| CN103151521A (en) * | 2013-02-22 | 2013-06-12 | 中国科学院过程工程研究所 | Positive electrode material of lithium ion battery and preparing method thereof |
| CN104393235A (en) * | 2014-04-21 | 2015-03-04 | 天津锦美碳材科技发展有限公司 | Lithium-salt-modified lithium ion battery anode material and preparation method thereof |
| CN104091937A (en) * | 2014-07-18 | 2014-10-08 | 深圳市振华新材料股份有限公司 | Lithium titanate-coated surface-treated graphite negative electrode material, preparation method and application of negative electrode material |
| CN104577095A (en) * | 2015-01-30 | 2015-04-29 | 湖南杉杉新能源有限公司 | Embedded nano-compound coated modified cathode material for lithium ion battery and preparation method of cathode material |
| CN104681860B (en) * | 2015-02-09 | 2017-03-01 | 惠州市豪鹏科技有限公司 | A kind of can fast charging and discharging high-voltage lithium ion batteries and preparation method thereof |
| CN104681860A (en) * | 2015-02-09 | 2015-06-03 | 惠州市豪鹏科技有限公司 | Quick charging and discharging type high voltage lithium ion battery and preparation method thereof |
| WO2016206548A1 (en) * | 2015-06-26 | 2016-12-29 | 田东 | Preparation method for lithium battery high-voltage modified negative electrode material |
| CN105140501A (en) * | 2015-07-06 | 2015-12-09 | 新乡远东电子科技有限公司 | Lithium titanate-coated graphite composite material and preparation method thereof |
| CN106374093A (en) * | 2016-11-07 | 2017-02-01 | 珠海格力电器股份有限公司 | Graphite composite material, preparation method and application thereof |
| CN107959012A (en) * | 2017-11-17 | 2018-04-24 | 力信（江苏）能源科技有限责任公司 | A kind of individual layer/double-coating Si oxide composite negative pole material and preparation method thereof |
| CN108232175A (en) * | 2018-02-06 | 2018-06-29 | 安徽科达铂锐能源科技有限公司 | A kind of lithium ion battery graphite/lithium titanate composite anode material and preparation method |
| CN109888229A (en) * | 2019-03-01 | 2019-06-14 | 中山市华舜科技有限责任公司 | A kind of preparation method of the lithium ion battery negative material based on lithium titanate coated graphite composite material |
| CN111682183A (en) * | 2020-06-22 | 2020-09-18 | 贝特瑞新材料集团股份有限公司 | Multi-element composite negative electrode material, preparation method thereof and lithium ion battery |
| CN111682183B (en) * | 2020-06-22 | 2022-10-28 | 贝特瑞新材料集团股份有限公司 | Multi-element composite negative electrode material, preparation method thereof and lithium ion battery |
| CN112687874A (en) * | 2020-12-28 | 2021-04-20 | 萝北奥星新材料有限公司 | High-stability lithium battery negative electrode material and application thereof |
| CN112687874B (en) * | 2020-12-28 | 2022-11-18 | 萝北奥星新材料有限公司 | High-stability lithium battery negative electrode material and application thereof |
| CN113363444A (en) * | 2021-06-15 | 2021-09-07 | 广东凯金新能源科技股份有限公司 | Nano lithium titanate-coated modified graphite negative electrode material, and preparation method and application thereof |
| CN114655951A (en) * | 2022-04-17 | 2022-06-24 | 晖阳(贵州)新能源材料有限公司 | Preparation method of lithium ion battery negative electrode material |
| CN114655951B (en) * | 2022-04-17 | 2022-09-02 | 晖阳(贵州)新能源材料有限公司 | Preparation method of lithium ion battery cathode material |
| CN116217245A (en) * | 2023-02-14 | 2023-06-06 | 西北工业大学 | In-situ synthesis of Hf x Ta 1-x C solid solution coated graphite particle powder and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102683705A (en) | Lithium-titanate-coated modified graphite composite anode material, and preparation method and application thereof | |
| CN106450265B (en) | A kind of situ Nitrogen Doping carbon coating lithium titanate combination electrode material and preparation method thereof | |
| CN105552324A (en) | Preparation method for lithium iron phosphate coated lithium nickel cobalt manganese composite material | |
| CN102244233B (en) | Method for preparing composite cathode material of graphene-like doped-cladded lithium titanate | |
| CN102983316A (en) | Electrode material of secondary lithium ion battery, and its preparation method | |
| CN102795666A (en) | Method for preparing vanadium pentoxide cathode nano-material of lithium-ion battery | |
| CN109346710B (en) | Lithium titanate nitride-aluminum oxide nitride composite material and preparation method and application thereof | |
| CN103390748B (en) | A kind of preparation method of alumina-coated lithium cobaltate cathode material | |
| CN102044665A (en) | Preparation method of yttrium-containing lithium titanate serving as cathode material of lithium ion secondary battery | |
| CN104659346A (en) | Germanium/carbon composite negative electrode material and preparation method thereof | |
| CN105406038A (en) | High-capacity and high-cycle nanoscale lithium ferric manganese phosphate material synthesized by sol-gel method | |
| CN102299312A (en) | Three-dimensional porous lithium vanadate anode material and preparation method thereof | |
| CN103746094A (en) | C-LiFePO4/PTPAn composite material, its application and lithium battery produced by composite material thereof | |
| CN101764227A (en) | Lithium ferrosilicon silicate/carbon composite cathode material and preparation method thereof | |
| CN103700814B (en) | A kind of carbon solid acid aluminum zirconate doping phosphoric acid titanium lithium three component surface modification ferric fluoride anode material and preparation method | |
| CN101252188A (en) | Method for low temperature preparing lithium ion battery positive pole material fluorophosphoric acid vanadium lithium | |
| CN106532031B (en) | A kind of Li4Ti5O12Negative electrode material and its manufactured lithium titanate battery | |
| CN101465425B (en) | LiFePO4 anode material for chitosan-modified lithium ion battery | |
| CN105304905A (en) | Modified material for positive electrode of lithium ion battery and preparation method of modified material | |
| CN105226251A (en) | A kind of pure carbon compound cathode materials and preparation method thereof | |
| Zeng et al. | Enhanced low-temperature performance of slight Mn-substituted LiFePO 4/C cathode for lithium ion batteries | |
| CN101728524A (en) | Lithium ion battery/capacitor electrode material and preparation method thereof | |
| CN103296251A (en) | Preparation method of lithium-titanate-cladding sulfur composite lithium-ion battery positive material | |
| CN103579597A (en) | Cathode material lithium titanate composite material of lithium ion secondary battery and preparation method of the material | |
| CN102709562A (en) | Method for preparing lithium iron phosphate by using liquid phase method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 230011, No. 7 D Road, Yaohai Industrial Park, Hefei, Anhui, China Applicant after: Hefei Guoxuan High-Tech Power Energy Co., Ltd. Address before: 230011, No. 7 D Road, Yaohai Industrial Park, Hefei, Anhui, China Applicant before: Hefei Guoxuan High-Tech Power Energy Co., Ltd. |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: HEFEI GUOXUAN HIGH-TECH POWER ENERGY CO., LTD. TO: HEFEI GUOXUAN HIGH-TECH POWER ENERGY CO., LTD. |
|
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Yongzhi Inventor after: Yang Maoping Inventor after: Yang Xulai Inventor before: Yang Xulai Inventor before: Chen Yan Inventor before: Wang Kanglu |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: YANG XULAI CHEN YAN WANG KANGLU TO: WANG YONGZHI YANG MAOPING YANG XULAI |
|
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120919 |