Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of method for preparing nickel-cobalt-aluminum precursor with aluminum ion chelating agent prepared by Schiff base reaction

A Schiff base, chelating agent technology, applied in chemical instruments and methods, nickel compounds, structural parts, etc., can solve problems such as poor structural stability, loose particles, and low discharge capacity

Active Publication Date: 2022-07-05
HUBEI HONGRUN HIGH-TECH NEW MATERIALS CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the nickel-cobalt-aluminate lithium obtained by doping lithium with the precursor has loose particles, poor structural stability, and low discharge capacity.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of method for preparing nickel-cobalt-aluminum precursor with aluminum ion chelating agent prepared by Schiff base reaction
  • A kind of method for preparing nickel-cobalt-aluminum precursor with aluminum ion chelating agent prepared by Schiff base reaction
  • A kind of method for preparing nickel-cobalt-aluminum precursor with aluminum ion chelating agent prepared by Schiff base reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Using nickel sulfate, cobalt sulfate, and aluminum sulfate as raw materials, according to the ratio of Ni:Co:Al to 0.8:0.15:0.5 to prepare a 2mol / L mixed brine solution, and then add a chelating agent, Al 3+ The molar ratio to the chelating agent is 3:1 to form solution A. A 0.6 mol / L ammonia solution B was prepared. Prepare 4mol / L sodium hydroxide solution C.

[0024] The prepared solution A, solution B and solution C were synchronously injected into the reactor at a controlled flow rate to keep the pH value of the mixed system between 11.4 and 11.6, and the reactor temperature was kept at 50 °C.

[0025] After the injection of solution A is completed, the injection of B and C is stopped and the reaction and aging are continued for 6-10 hours, and then the solid-liquid separation is carried out with a filter press. Cobalt aluminum precursor material.

Embodiment 2

[0027] Using nickel sulfate, cobalt sulfate, and aluminum sulfate as raw materials, according to the ratio of Ni:Co:Al to 0.8:0.15:0.5 to prepare a 2mol / L mixed brine solution, and then add a chelating agent, Al 3+ The molar ratio to the chelating agent is 1:1 to form solution A. A 0.6 mol / L ammonia solution B was prepared. Prepare 4mol / L sodium hydroxide solution C.

[0028] The prepared solution A, solution B and solution C were synchronously injected into the reactor at a controlled flow rate to keep the pH value of the mixed system between 11.4 and 11.6, and the reactor temperature was kept at 50 °C.

[0029] After the injection of solution A is completed, the injection of B and C is stopped and the reaction and aging are continued for 6-10 hours, and then the solid-liquid separation is carried out with a filter press. Cobalt aluminum precursor material.

Embodiment 3

[0031] Using nickel sulfate, cobalt sulfate, and aluminum sulfate as raw materials, according to the ratio of Ni:Co:Al to 0.8:0.15:0.5 to prepare a 2mol / L mixed brine solution, and then add a chelating agent, Al 3+ The molar ratio to the chelating agent is 1:3 to form solution A. A 0.6 mol / L ammonia solution B was prepared. Prepare 4mol / L sodium hydroxide solution C.

[0032] The prepared solution A, solution B and solution C were synchronously injected into the reactor at a controlled flow rate to keep the pH value of the mixed system between 11.4 and 11.6, and the reactor temperature was kept at 50 °C.

[0033] After the injection of solution A is completed, the injection of B and C is stopped and the reaction and aging are continued for 6-10 hours, and then the solid-liquid separation is carried out with a filter press. Cobalt aluminum precursor material.

[0034] like image 3 , 4 As shown in , 5, comparing the three examples, with the increase of the chelating agent,...

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 invention discloses a method for preparing a nickel-cobalt-aluminum precursor by using a Schiff base reaction to prepare a chelating agent for aluminum ions. When nickel cobalt aluminum ions react with sodium hydroxide for ternary coprecipitation, due to Al(OH) 3 The ion product Ksp is much smaller than that of Ni(OH) 2 and Co(OH) 2 , Al 3+ will rapidly precipitate to form Al(OH) 3 colloid, unable to co-precipitate uniformly in ternary. Schiff bases are a class of organic compounds containing imine or methaneimine characteristic groups (‑RC=N‑), which can specifically interact with Al. 3+ Coordination, chelation forms a conjugated rigid backbone. The chelating agent is prepared by the Schiff base reaction, and this characteristic is used to reduce the precipitation speed of aluminum ions in the ternary co-precipitation reaction, so as to achieve uniform ternary co-precipitation.

Description

technical field [0001] The invention relates to a preparation method of a nickel-cobalt-aluminum ternary precursor of a new energy lithium ion battery material. Background technique [0002] At present, lithium-ion batteries have been widely used in various mobile electrical appliances, such as mobile phones, cameras, notebook computers, etc. With the continuous increase in the power consumption of portable devices, various battery supporting manufacturers have relatively small size, light weight, and specific capacity. The demand for high-quality lithium-ion secondary batteries with better safety performance continues to increase. LiNiO2 doped Co element cathode material also has higher discharge specific capacity of LiNiO2 material, stabilizes the layered structure of the material, and enhances the cycle performance of the material. The representative material can be expressed as LiNi0.8Co0.2O2. The composed cathode material has better energy density compared to the same ...

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 Patents(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/525H01M10/0525C01G53/00
CPCH01M4/525H01M4/485H01M4/362H01M10/0525H01M2004/028Y02E60/10
Inventor 涂全胡培叶建史德友
Owner HUBEI HONGRUN HIGH-TECH NEW MATERIALS CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com