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1. (WO2018032974) METHOD OF PREPARING MATERIAL OF NEGATIVE ELECTRODE OF LITHIUM ION BATTERY
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Pub. No.: WO/2018/032974 International Application No.: PCT/CN2017/095797
Publication Date: 22.02.2018 International Filing Date: 03.08.2017
IPC:
H01M 4/36 (2006.01) ,H01M 4/38 (2006.01) ,H01M 4/583 (2010.01) ,H01M 4/62 (2006.01) ,H01M 10/0525 (2010.01) ,B82Y 30/00 (2011.01)
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4
Electrodes
02
Electrodes composed of, or comprising, active material
36
Selection of substances as active materials, active masses, active liquids
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4
Electrodes
02
Electrodes composed of, or comprising, active material
36
Selection of substances as active materials, active masses, active liquids
38
of elements or alloys
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4
Electrodes
02
Electrodes composed of, or comprising, active material
36
Selection of substances as active materials, active masses, active liquids
58
of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
583
Carbonaceous material, e.g. graphite-intercalation compounds or CFx
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4
Electrodes
02
Electrodes composed of, or comprising, active material
62
Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10
Secondary cells; Manufacture thereof
05
Accumulators with non-aqueous electrolyte
052
Li-accumulators
0525
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
B PERFORMING OPERATIONS; TRANSPORTING
82
NANO-TECHNOLOGY
Y
SPECIFIC USES OR APPLICATIONS OF NANO-STRUCTURES; MEASUREMENT OR ANALYSIS OF NANO-STRUCTURES; MANUFACTURE  OR TREATMENT OF NANO-STRUCTURES
30
Nano-technology for materials or surface science, e.g. nano-composites
Applicants:
福建新峰二维材料科技有限公司 XIFENG 2D (FUJIAN) MATERIAL TECHNOLOGY COMPANY LTD [CN/CN]; 中国福建省泉州市 台商投资区东园镇东经2路 Dongjing No.2 Road Dongyuan, Taiwannese Investment Zone Quanzhou, Fujian 362000, CN
Inventors:
孙绍庆 SUN, Shaoqing; CN
Priority Data:
201610668836.815.08.2016CN
Title (EN) METHOD OF PREPARING MATERIAL OF NEGATIVE ELECTRODE OF LITHIUM ION BATTERY
(FR) PROCÉDÉ DE PRÉPARATION DE MATÉRIAU D'ÉLECTRODE NÉGATIVE DE BATTERIE AU LITHIUM-ION
(ZH) 一种锂离子电池负极材料的制备方法
Abstract:
(EN) The invention discloses a method of preparing a material of a negative electrode of a lithium ion battery, effectively mitigating a size effect of silicon. The method comprises the following steps: firstly, preparing a modified graphene microchip; secondly, growing, on a surface of the graphene microchip, a silicon nanosphere, so as to obtain a graphene microchip-silicon nanosphere composite material; and depositing, using an atomic layer deposition technique, and on the surface of the graphene microchip-silicon nanosphere, a metal oxide layer; performing an electrostatic spinning and calcination treatment to obtain a carbon nanofiber composite material; performing an acid treatment on the carbon nanofiber composite material, removing a metal oxide layer to form a gap structure; and finally, forming a carbon coating layer covering outside the carbon nanofiber composite material. The method disclosed in the invention is utilized to prepare, using a simple preparation process, an accurate and controllable gap structure, effectively providing a space for volume expansion of the silicon in a charging and discharging process, and further protecting, using the carbon coating layer formed at the outermost layer, the silicon nanosphere, ensuring integrity of the electrode structure, and increasing stability of the electrode structure.
(FR) L'invention concerne un procédé de préparation d'un matériau d'une électrode négative d'une batterie au lithium-ion, atténuant efficacement un effet dimensionnel du silicium. Le procédé comprend les étapes suivantes consistant à : premièrement, préparer une micropuce de graphène modifiée; deuxièmement, faire croître, sur une surface de la micropuce de graphène, une nanosphère de silicium, de manière à obtenir un matériau composite de nanosphère de silicium-micropuce de graphène; et déposer, à l'aide d'une technique de dépôt de couche atomique et sur la surface de la nanosphère de silicium de micro-puce de graphène, une couche d'oxyde métallique; effectuer un traitement de filage électrostatique et de calcination pour obtenir un matériau composite de nanofibres de carbone; effectuer un traitement à l'acide sur le matériau composite de nanofibres de carbone, éliminer une couche d'oxyde métallique pour former une structure d'espace; et enfin, former une couche de revêtement de carbone recouvrant l'extérieur du matériau composite de nanofibres de carbone. Le procédé décrit dans l'invention est utilisé pour préparer, à l'aide d'un procédé de préparation simple, une structure d'espace précise et réglable, fournir efficacement un espace pour une expansion de volume du silicium dans un processus de charge et de décharge, et protéger en outre, à l'aide de la couche de revêtement de carbone formée au niveau de la couche la plus à l'extérieur, la nanosphère de silicium, assurant l'intégrité de la structure d'électrode, et augmentant la stabilité de la structure d'électrode.
(ZH) 本发明公开了有效缓冲硅体积效应的锂离子电池负极材料的制备方法,包括以下步骤:首先制备改性石墨烯微片;然后在石墨烯微片表面生长纳米硅球,得到石墨烯微片-纳米硅球复合材料;再通过原子层沉积技术在石墨烯微片-纳米硅球表面沉积金属氧化物层;再进行静电纺丝及煅烧处理,得到碳纳米纤维复合材料;再对碳纳米纤维复合材料进行酸处理,去除金属氧化物层形成空隙结构;最后在碳纳米纤维复合材料外面形成碳包覆层。本发明制备过程简单,精确可控的空隙结构,有效缓冲硅在充放电过程中的体积膨胀,在最外层形成碳包覆层进一步保护纳米硅球,保证电极结构的完整性,增加电极结构的稳定性。
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Chinese (ZH)
Filing Language: Chinese (ZH)