WO2018113438A1 - Preparation method for electrode slice of lithium ion battery - Google Patents

Preparation method for electrode slice of lithium ion battery Download PDF

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Publication number
WO2018113438A1
WO2018113438A1 PCT/CN2017/110311 CN2017110311W WO2018113438A1 WO 2018113438 A1 WO2018113438 A1 WO 2018113438A1 CN 2017110311 W CN2017110311 W CN 2017110311W WO 2018113438 A1 WO2018113438 A1 WO 2018113438A1
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Prior art keywords
parts
ion battery
lithium ion
powder
dihydrogen phosphate
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PCT/CN2017/110311
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French (fr)
Chinese (zh)
Inventor
王海波
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苏州格瑞动力电源科技有限公司
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Publication of WO2018113438A1 publication Critical patent/WO2018113438A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H01M4/0471—Processes of manufacture in general involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H01M4/043—Processes of manufacture in general involving compressing or compaction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • 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

Definitions

  • the invention relates to a method for preparing a lithium ion battery electrode sheet.
  • lithium-ion batteries Compared with other traditional energy storage batteries, lithium-ion batteries have been widely used as portable power sources because of their high energy/power density, low environmental pollution, and long service life. With the in-depth study of these materials and the maturity of the process, the application field of lithium-ion batteries is broader, and it is not satisfied with the application of small electronic products such as notebook computers, etc., and they are gradually showing superiority in large power sources such as power vehicles. Performance. With the continuous resolution of key technologies for large-scale power lithium batteries, the application fields of lithium-ion batteries will be further broadened.
  • the lithium ion battery electrode material is lithium iron sulfide
  • the prepared lithium ion battery electrode sheet has defects of poor cycle stability and low charge and discharge capacity.
  • the technical solution of the present invention is to design a method for preparing a lithium ion battery electrode sheet, which comprises the following steps:
  • the tablet is subjected to high temperature baking at a temperature of 1000 to 1500 ° C and a calcination time of 6 to 12 hours to obtain a product.
  • the advantages and advantageous effects of the present invention are that the present invention uses less carbon.
  • the organic carbon source is “in situ” cracked during the nucleation growth process of lithium vanadium phosphate, which inhibits the excessive growth of the particles, and at the same time forms a carbon coating layer on the surface of the material particles to obtain a better coating effect.
  • the organic dispersant is used in the present invention, and the dispersant selected in the present invention is anhydrous ethanol in consideration of cost.
  • the tablet was subjected to high temperature baking at a temperature of 1000 ° C and a calcination time of 10 h to obtain a product.

Abstract

Disclosed is a preparation method for an electrode slice of a lithium ion battery. The method is characterized by comprising the following steps: (1) adding the following raw materials, in parts by weight, to a ball mill: 10-20 parts of lithium dihydrogen phosphate, 5-7 parts of vanadium trioxide, 30-50 parts of ammonium dihydrogen phosphate, 50-100 parts of glucose, 20-30 parts of ECP600 and 100-200 parts of anhydrous ethanol, and mixing evenly to obtain a slurry; (2) carrying out spray drying on the above-mentioned slurry to obtain a powder; (3) pressing the powder into a slice to obtain a pressed slice; and (4) carrying out high-temperature baking on the pressed slice to obtain a product, wherein the temperature is 1000ºC to 1500ºC, and the baking time is 6-12 hours. The electrode slice of the battery prepared by the preparation method for the electrode slice of a lithium ion battery has an excellent performance, a simple preparation process and low costs.

Description

一种锂离子电池电极片的制备方法Method for preparing lithium ion battery electrode sheet 技术领域Technical field
本发明涉及一种锂离子电池电极片的制备方法。The invention relates to a method for preparing a lithium ion battery electrode sheet.
背景技术Background technique
和其它传统的储能电池相比，锂离子电池具有高能量/功率密度、对环境污染小、使用寿命长等优点，已经广泛用作便携式电源。随着对这些材料的深入研究及工艺的日趋成熟，锂离子电池的应用领域更为宽广，已经不满足于应用于小电子产品如笔记本电脑等，在动力汽车等大型电源上也逐渐显示他们优越的性能。随着大型动力锂电池关键技术的不断解决，锂离子电池的应用领域还将进一步拓宽。Compared with other traditional energy storage batteries, lithium-ion batteries have been widely used as portable power sources because of their high energy/power density, low environmental pollution, and long service life. With the in-depth study of these materials and the maturity of the process, the application field of lithium-ion batteries is broader, and it is not satisfied with the application of small electronic products such as notebook computers, etc., and they are gradually showing superiority in large power sources such as power vehicles. Performance. With the continuous resolution of key technologies for large-scale power lithium batteries, the application fields of lithium-ion batteries will be further broadened.
一般地，锂离子电池电极材料为锂铁硫化物，制备得到的锂离子电池电极片存在着循环稳定性差和充放电容量低的缺陷。Generally, the lithium ion battery electrode material is lithium iron sulfide, and the prepared lithium ion battery electrode sheet has defects of poor cycle stability and low charge and discharge capacity.
发明内容Summary of the invention
本发明的目的在于提供一种锂离子电池电极片的制备方法，旨在解决上述问题。It is an object of the present invention to provide a method for preparing a lithium ion battery electrode sheet, which aims to solve the above problems.
为了实现上述目的，本发明的技术方案是设计一种锂离子电池电极片的制备方法，其特征在于包括以下步骤：In order to achieve the above object, the technical solution of the present invention is to design a method for preparing a lithium ion battery electrode sheet, which comprises the following steps:
1)按重量计，将磷酸二氢锂10～20份、三氧化二钒5～7份、磷酸二氢铵30～50份、葡萄糖50～100份、ECP600 20～30份和无水乙醇100～200份加入球磨机中均匀混合得到浆料；1) 10 to 20 parts by weight of lithium dihydrogen phosphate, 5 to 7 parts of vanadium pentoxide, 30 to 50 parts of ammonium dihydrogen phosphate, 50 to 100 parts of glucose, 20 to 30 parts of ECP600, and 100 parts of anhydrous ethanol. ~200 parts are added to the ball mill and uniformly mixed to obtain a slurry;
2)将上述浆料进行喷雾干燥，得到粉末；2) spray drying the above slurry to obtain a powder;
3)将粉末压制成片，得到压片；3) pressing the powder into tablets to obtain a tablet;
4)将压片进行高温烘焙，温度1000～1500℃，焙烧时间为6～12h，得到产物。4) The tablet is subjected to high temperature baking at a temperature of 1000 to 1500 ° C and a calcination time of 6 to 12 hours to obtain a product.
本发明的优点和有益效果在于：本发明用碳量少。制备过程中有机碳源在磷酸钒锂成核生长过程中“原位”裂解，抑制了颗粒的过度生长，同时在材料颗粒表面形成的碳包覆层，获得更好的包覆效果。本发明采用的为有机分散剂，同时考虑到成本，本发明选用的分散剂为无水乙醇。The advantages and advantageous effects of the present invention are that the present invention uses less carbon. During the preparation process, the organic carbon source is “in situ” cracked during the nucleation growth process of lithium vanadium phosphate, which inhibits the excessive growth of the particles, and at the same time forms a carbon coating layer on the surface of the material particles to obtain a better coating effect. The organic dispersant is used in the present invention, and the dispersant selected in the present invention is anhydrous ethanol in consideration of cost.
具体实施方式detailed description
下面结合实施例，对本发明的具体实施方式作进一步描述。以下实施例仅用于更加清楚地说明本发明的技术方案，而不能以此来限制本发明的保护范围。The specific embodiments of the present invention are further described below in conjunction with the embodiments. The following examples are only intended to more clearly illustrate the technical solutions of the present invention, and are not intended to limit the scope of the present invention.
实施例：Example:
一种锂离子电池电极片，其特征在于包括以下步骤： A lithium ion battery electrode sheet characterized by comprising the following steps:
1)按重量计，将磷酸二氢锂20份、三氧化二钒7份、磷酸二氢铵50份、葡萄糖50份、ECP600 30份和无水乙醇100份加入球磨机中均匀混合得到浆料；1) by weight, 20 parts of lithium dihydrogen phosphate, 7 parts of vanadium pentoxide, 50 parts of ammonium dihydrogen phosphate, 50 parts of glucose, 30 parts of ECP600 and 100 parts of absolute ethanol are added to a ball mill and uniformly mixed to obtain a slurry;
2)将上述浆料进行喷雾干燥，得到粉末；2) spray drying the above slurry to obtain a powder;
3)将粉末压制成片，得到压片；3) pressing the powder into tablets to obtain a tablet;
4)将压片进行高温烘焙，温度1000℃，焙烧时间为10h，得到产物。4) The tablet was subjected to high temperature baking at a temperature of 1000 ° C and a calcination time of 10 h to obtain a product.
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明技术原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。 The above description is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make several improvements and retouchings without departing from the technical principles of the present invention. It should also be considered as the scope of protection of the present invention.

Claims (2)

  1. 一种锂离子电池电极片的制备方法，其特征在于包括以下步骤：A method for preparing a lithium ion battery electrode sheet, comprising the steps of:
    1)按重量计，将磷酸二氢锂10～20份、三氧化二钒5～7份、磷酸二氢铵30～50份、葡萄糖50～100份、ECP600 20～30份和无水乙醇100～200份加入球磨机中均匀混合得到浆料；1) 10 to 20 parts by weight of lithium dihydrogen phosphate, 5 to 7 parts of vanadium pentoxide, 30 to 50 parts of ammonium dihydrogen phosphate, 50 to 100 parts of glucose, 20 to 30 parts of ECP600, and 100 parts of anhydrous ethanol. ~200 parts are added to the ball mill and uniformly mixed to obtain a slurry;
    2)将上述浆料进行喷雾干燥，得到粉末；2) spray drying the above slurry to obtain a powder;
    3)将粉末压制成片，得到压片；3) pressing the powder into tablets to obtain a tablet;
    4)将压片进行高温烘焙，温度1000～1500℃，焙烧时间为6～12h，得到产物。4) The tablet is subjected to high temperature baking at a temperature of 1000 to 1500 ° C and a calcination time of 6 to 12 hours to obtain a product.
  2. 根据权利要求1所述的一种锂离子电池电极片，其特征在于包括以下步骤：A lithium ion battery electrode sheet according to claim 1, comprising the steps of:
    1)按重量计，将磷酸二氢锂20份、三氧化二钒7份、磷酸二氢铵50份、葡萄糖50份、ECP600 30份和无水乙醇100份加入球磨机中均匀混合得到浆料；1) by weight, 20 parts of lithium dihydrogen phosphate, 7 parts of vanadium pentoxide, 50 parts of ammonium dihydrogen phosphate, 50 parts of glucose, 30 parts of ECP600 and 100 parts of absolute ethanol are added to a ball mill and uniformly mixed to obtain a slurry;
    2)将上述浆料进行喷雾干燥，得到粉末；2) spray drying the above slurry to obtain a powder;
    3)将粉末压制成片，得到压片；3) pressing the powder into tablets to obtain a tablet;
    4)将压片进行高温烘焙，温度1000℃，焙烧时间为10h，得到产物。 4) The tablet was subjected to high temperature baking at a temperature of 1000 ° C and a calcination time of 10 h to obtain a product.
PCT/CN2017/110311 2016-12-19 2017-11-10 Preparation method for electrode slice of lithium ion battery WO2018113438A1 (en)

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Publication number Priority date Publication date Assignee Title
CN106784597A (en) * 2016-12-19 2017-05-31 苏州格瑞动力电源科技有限公司 A kind of preparation method of lithium ion cell electrode piece
CN108987666A (en) * 2018-06-29 2018-12-11 成都三乙医疗科技有限公司 A kind of battery electrode piece preparation method

Citations (7)

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CN101883735A (en) * 2007-10-01 2010-11-10 巴斯夫欧洲公司 Process for the preparation of crystalline lithium-, vanadium- and phosphate-comprising materials
CN102123943A (en) * 2007-10-01 2011-07-13 巴斯夫欧洲公司 Process for the preparation of porous lithium-, vanadium and phosphate-comprising materials
WO2012051280A2 (en) * 2010-10-12 2012-04-19 The Research Foundation Of State University Of New York Composite electrodes, methods of making, and uses thereof
CN104134779A (en) * 2014-03-27 2014-11-05 合肥国轩高科动力能源股份公司 High voltage lithium ion battery positive pole piece and preparation method thereof
CN105449164A (en) * 2014-09-24 2016-03-30 中国科学院大连化学物理研究所 Cathode material for lithium vanadium phosphate battery and preparation and application thereof
CN105789597A (en) * 2016-05-05 2016-07-20 天津巴莫科技股份有限公司 Preparation method of lithium vanadium phosphate cathode material
CN106784597A (en) * 2016-12-19 2017-05-31 苏州格瑞动力电源科技有限公司 A kind of preparation method of lithium ion cell electrode piece

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101883735A (en) * 2007-10-01 2010-11-10 巴斯夫欧洲公司 Process for the preparation of crystalline lithium-, vanadium- and phosphate-comprising materials
CN102123943A (en) * 2007-10-01 2011-07-13 巴斯夫欧洲公司 Process for the preparation of porous lithium-, vanadium and phosphate-comprising materials
WO2012051280A2 (en) * 2010-10-12 2012-04-19 The Research Foundation Of State University Of New York Composite electrodes, methods of making, and uses thereof
CN104134779A (en) * 2014-03-27 2014-11-05 合肥国轩高科动力能源股份公司 High voltage lithium ion battery positive pole piece and preparation method thereof
CN105449164A (en) * 2014-09-24 2016-03-30 中国科学院大连化学物理研究所 Cathode material for lithium vanadium phosphate battery and preparation and application thereof
CN105789597A (en) * 2016-05-05 2016-07-20 天津巴莫科技股份有限公司 Preparation method of lithium vanadium phosphate cathode material
CN106784597A (en) * 2016-12-19 2017-05-31 苏州格瑞动力电源科技有限公司 A kind of preparation method of lithium ion cell electrode piece

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