Method of preparing tin-copper-nickel-cobalt alloy cathode material by two-step plating

A negative electrode material, nickel-cobalt alloy technology, applied in the field of thin-film lithium-ion batteries, can solve the problems of large irreversible capacity, large volume expansion rate, and large capacity attenuation, and achieve excellent discharge performance, simple preparation process, and low raw material cost. Effect

Inactive Publication Date: 2007-10-17
FUJIAN NORMAL UNIV
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that despite the above improvement efforts, these tin-based anode materials still show a large volume expansion rate and a large capacity decay during the charge-discharge cycle, especially the irreversible capacity of the first cycle.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Modified layer electroplating and preparation of electroplating solution

[0021] Dissolve 50g of nickel chloride, 180g of cobalt chloride and 1g of boric acid in 900mL of distilled water according to the weight to volume ratio, and control the temperature of the electroplating solution to 20°C.

[0022] Place the copper sheet in the electroplating solution at 0.1A / dm 2 Under the direct current of 30 minutes in cathodic electroplating, obtain the copper sheet that coats nickel-cobalt alloy film layer.

[0023] (2) Preparation of activation layer electroplating and electroplating solution

[0024] Dissolve 5g of sodium stannate, 5g of sodium hydroxide and 5g of sodium acetate in 800mL of distilled water according to the ratio of weight to volume, and control the temperature of the electroplating solution to 40°C.

[0025] Clean the copper sheet coated with the nickel-cobalt alloy film layer and place it in the activation plating solution at 0.1A / dm 2 Under the dir...

Embodiment 2

[0027] (1) Modified layer electroplating and preparation of electroplating solution

[0028] Dissolve 280g of nickel chloride, 10g of cobalt chloride and 10g of boric acid in 900mL of distilled water according to the weight to volume ratio, and control the temperature of the electroplating solution to 40°C.

[0029] Place the copper sheet in the plating solution at 0.5A / dm 2 Under the direct current of 5 minutes, the copper sheet coated with the nickel-cobalt alloy film layer was obtained by cathodic electroplating for 5 minutes.

[0030] (2) Preparation of activation layer electroplating and electroplating solution

[0031] Dissolve 30g of sodium stannate, 30g of sodium hydroxide and 20g of sodium acetate in 900mL of distilled water by weight to volume ratio, and control the temperature of the electroplating solution to 60°C.

[0032] Clean the copper sheet covered with the nickel-cobalt alloy film layer and place it in the activation layer plating solution at a current den...

Embodiment 3

[0034] (1) Modified layer electroplating and preparation of electroplating solution (weight to volume ratio)

[0035] Dissolve 140g of nickel chloride, 90g of cobalt chloride and 30g of boric acid in 900mL of distilled water according to the weight to volume ratio, and control the temperature of the electroplating solution to 75°C

[0036] Place the copper sheet in the plating solution at 1.5A / dm 2 Under the direct current of 0.2 minutes, the copper sheet coated with the nickel-cobalt alloy film layer was obtained by cathodic electroplating for 0.2 minutes.

[0037] (2) Preparation of activation layer electroplating and electroplating solution

[0038] Dissolve 60g of sodium stannate, 50g of sodium hydroxide and 30g of sodium acetate in 800mL of distilled water according to the weight to volume ratio, and control the temperature of the plating solution to 60°C.

[0039] Clean the copper sheet coated with the nickel-cobalt alloy film layer and place it in the electroplating sol...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention relates to a process for preparing tin-cuprum-cobalt-nickel alloy material materials by utilizing two-step electric plating. Said process consists of two steps of electric plating courses such as modification layer electric plating and activation layer electric plating, wherein said modification layer plating solution consists of nickelous chloride of 50-280g, cobalt chloride of 10-180g, boracic acid of 1-50g and distilled water of 800-900mL, with a temperature of 20-75 DEG C and an electric plating time for 0.2-30 minutes; the activation layer plating solution consists of sodium stannate of 5-60g, sodium hydrate of 5-60g, sodium acetate of 5-50g and distilled water of 800-900mL, with a temperature of 40-80 DEG C and an electric plating time of 0.2-50 minutes. Said two steps of electric plating are carried out at any electric current density of the siding-to-siding block of 0.1-1.5 A/dm2. The raw material in accordance with the present invention has a lower cost and a wide source, with a simple preparing process and few time consumption. Said electrode material possesses excellent discharging performances and charging-discharging cycling stability, with its first discharge capacity being higher than 400mAh activity material, exhibits excellent circulation performances, can have application in lithium ion battery, lithium battery, polymer lithium ion battery, especially thin film-type power cell.

Description

technical field [0001] The invention relates to a method for preparing a tin-copper-nickel-cobalt alloy negative electrode material by two-step electroplating. The alloy prepared by the method has important applications in the field of batteries, especially in the field of thin-film lithium ion batteries. technical background [0002] With the continuous introduction of mobile electronic products, the performance requirements for lithium-ion batteries are getting higher and higher, and the quantity requirements are increasing. At present, the anode materials of commercial lithium-ion batteries are mainly graphitized carbon materials. The disadvantage of this material is that the SEI film generated by the first discharge will lead to high irreversible capacity loss. Graphitized carbon materials may cause battery failure or cause safety issues due to the decomposition of the protective layer at high temperatures. As a potential substitute for graphitized carbon anode materia...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/12C25D3/56
Inventor 童庆松施继成成月黄熠徐伟程林卢阳
Owner FUJIAN NORMAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap