CN107959014A - 一种超高电压倍率锂电池正极体系的制作方法 - Google Patents

一种超高电压倍率锂电池正极体系的制作方法 Download PDF

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CN107959014A
CN107959014A CN201711163516.8A CN201711163516A CN107959014A CN 107959014 A CN107959014 A CN 107959014A CN 201711163516 A CN201711163516 A CN 201711163516A CN 107959014 A CN107959014 A CN 107959014A
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lithium battery
battery anode
high voltage
extra
production method
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李齐云
李宗厚
李光泉
许向贵
梁文杰
于萌
葛方昕
苏少明
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YUNTONG POWER CO Ltd
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YUNTONG POWER CO Ltd
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M4/36Selection of substances as active materials, active masses, active liquids
    • H01M4/362Composites
    • H01M4/366Composites as layered products
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/052Li-accumulators
    • H01M10/0525Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M4/36Selection of substances as active materials, active masses, active liquids
    • H01M4/48Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/52Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
    • H01M4/525Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M4/36Selection of substances as active materials, active masses, active liquids
    • H01M4/58Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583Carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M4/62Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/624Electric conductive fillers
    • H01M4/625Carbon or graphite
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Secondary Cells (AREA)

Abstract

本发明公开了一种超高电压倍率锂电池正极体系的制作方法,将石墨烯粉末包覆于锂电池正极基体表面,使之形成具有优异物理特性的保护层,即利用石墨烯具有“硬”的物理特性和高温传导功能,故采用本发明方法制得的锂电池正极体系实现超高能量密度的大电流充放电,可制得4.5V及以上的高电压倍率电池,并有效避免了“坍塌”现象。

Description

一种超高电压倍率锂电池正极体系的制作方法
【技术领域】
本发明涉及电池制作方法,尤其是一种超高电压倍率锂电池正极体系的制作方法。
【背景技术】
高电压钴酸锂正极材料,作为锂电池正极材料体系新近出现的产品,其具有更高能量密度,但倍率性能及高温性能不佳,制约了高电压锂电池材料的进一步推广。另外通过钛金属包覆的正极材料充电上限已经受限,不能进一步提高充电上限,即不能达到更高能量密度,且目前高电压倍率电池充电上限只能做到4.4V。需要追求超高能量密度电池,再往更高电压方向发展,在充放电过程中,正极材料的结构就会“坍塌”,造成电池失效。
本发明及针对现有技术的不足而研究提出。
【发明内容】
本发明要解决的技术问题是提供一种超高电压倍率锂电池正极体系的制作方法,将石墨烯粉末包覆于锂电池正极基体表面,使之形成具有优异物理特性的保护层,即利用石墨烯具有“硬”的物理特性和高温传导功能,故采用本发明方法制得的锂电池正极体系实现超高能量密度的大电流充放电,可制得4.5V及以上的高电压倍率电池,并有效避免了“坍塌”现象。
为解决上述技术问题,本发明一种超高电压倍率锂电池正极体系的制作方法,将石墨烯粉末均匀包覆于锂电池正极基体表面。
所述锂电池正极基体充放电压具有4.4V及以上。
所述锂电池正极基体为钴酸锂正极基体,
所述石墨烯粉末通过超速分散机均匀包覆于锂电池正极基体表面。
与现有技术相比较,本发明一种超高电压倍率锂电池正极体系的制作方法,具有如下优点:
1、石墨烯粉末包覆于锂电池正极基体表面,形成了具有优异物理特性的保护层,该保护层使得锂电池正极体系实现超高能量密度的大电流充放电,可制得4.5V及以上的高电压倍率电池。
2、采用本发明方法所制得的锂电池正极体系,在使用过程中可有效避免了“坍塌”现象。
3、稳定性、安全性及循环性良好。
【具体实施方式】
下面对本发明的实施方式作详细说明。
本发明一种超高电压倍率锂电池正极体系的制作方法,将石墨烯粉末均匀包覆于锂电池正极基体表面,由于石墨烯粉末包覆于锂电池正极基体表面,形成了具有优异物理特性的保护层,该保护层使得锂电池正极体系实现超高能量密度的大电流充放电,与现有技术相比,能量密度提高10%。
所述锂电池正极基体充放电压具有4.4V及以上,为此,采用本发明方法,可制得4.5V及以上的高电压倍率电池。
本发明中,所述锂电池正极基体为钴酸锂正极基体,所述石墨烯粉末通过超速分散机均匀包覆于锂电池正极基体表面。

Claims (4)

1.一种超高电压倍率锂电池正极体系的制作方法,其特征在于将石墨烯粉末均匀包覆于锂电池正极基体表面。
2.根据权利要求1所述一种超高电压倍率锂电池正极体系的制作方法,其特征在于所述锂电池正极基体充放电压具有4.4V及以上。
3.根据权利要求1所述一种超高电压倍率锂电池正极体系的制作方法,其特征在于所述锂电池正极基体为钴酸锂正极基体。
4.根据权利要求1或2或3所述一种超高电压倍率锂电池正极体系的制作方法,其特征在于所述石墨烯粉末通过超速分散机均匀包覆于锂电池正极基体表面。
CN201711163516.8A 2017-11-21 2017-11-21 一种超高电压倍率锂电池正极体系的制作方法 Withdrawn CN107959014A (zh)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105826552A (zh) * 2015-01-07 2016-08-03 无锡市惠诚石墨烯技术应用有限公司 一种石墨烯复合的钴酸锂正极材料的制备方法
CN106025266A (zh) * 2015-03-26 2016-10-12 深圳市华思旭科技有限公司 一种高倍率锂离子电池正极材料及其制备方法
CN106784654A (zh) * 2016-11-28 2017-05-31 荆门市格林美新材料有限公司 一种石墨烯包覆钴酸锂材料的制备方法
CN107293731A (zh) * 2017-07-31 2017-10-24 东莞市联洲知识产权运营管理有限公司 一种新型锂离子电池正极材料的制备方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105826552A (zh) * 2015-01-07 2016-08-03 无锡市惠诚石墨烯技术应用有限公司 一种石墨烯复合的钴酸锂正极材料的制备方法
CN106025266A (zh) * 2015-03-26 2016-10-12 深圳市华思旭科技有限公司 一种高倍率锂离子电池正极材料及其制备方法
CN106784654A (zh) * 2016-11-28 2017-05-31 荆门市格林美新材料有限公司 一种石墨烯包覆钴酸锂材料的制备方法
CN107293731A (zh) * 2017-07-31 2017-10-24 东莞市联洲知识产权运营管理有限公司 一种新型锂离子电池正极材料的制备方法

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Application publication date: 20180424