Composite complexing agent and method of preparing lithium-ion power battery cathode precursor material

A technology of composite complexing agent and power battery, applied in battery electrodes, positive electrodes, secondary batteries, etc., can solve the problems of high control requirements of experimental conditions, threats to the health of operators, serious waste liquid treatment problems, etc. The effect of easy long-term storage, good surface particle morphology and high industrial value

Active Publication Date: 2018-12-25
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Enterprises usually use a single ammonia water as a complexing agent, but the ammonia gas it volatilizes is irritating and corrosive to the eyes, nose, and skin, threatening the health of operators, and the disposal of waste liquid is a serious problem
At present, there are very few literatures pointing out the use of a single new comp

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
  • Composite complexing agent and method of preparing lithium-ion power battery cathode precursor material
  • Composite complexing agent and method of preparing lithium-ion power battery cathode precursor material
  • Composite complexing agent and method of preparing lithium-ion power battery cathode precursor material

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0033] Example 1

[0034] First prepare NiSO with a concentration of 4.0mol / L 4 ·6H 2 O, CoSO 4 ·7H 2 O, MnSO 4 ·H 2 O mixed solution, in which the molar ratio of metal cations satisfies Ni 2+ :Co 2+ :Mn 2+ =6:2:2; prepare a complex complexing agent solution (citrate 2.5mol / L, glutamate 0.5mol / L); prepare a sodium hydroxide solution with a concentration of 4.0mol / L as a precipitant; first The sodium hydroxide solution was pumped into the reaction kettle, the temperature of the water bath was controlled at 60°C, the pH value was adjusted and controlled to be 11.5, and then the mixed solution of the metal cation solution and the complex complexing agent was pumped, and the stirring speed was controlled at 800 rpm, at a temperature of 60°C. After aging for 20 hours in a reactor at ℃, deionized washing, and drying at 100 ℃, the tap density was 1.85g / cm 3 of (Ni 0.6 Mn 0.2 Co 0.2 )(OH) 2 Precursor. ICP composition analysis of the precursor showed that metal cations (N...

Example Embodiment

[0043] Example 2

[0044] Prepare NiSO with a concentration of 4.0mol / L 4 ·6H 2 O, CoSO 4 ·7H 2 O, MnSO 4 ·H 2 O mixed solution, wherein the molar ratio of metal cations satisfies Ni 2+ :Co 2+ :Mn 2+ =6:2:2; prepare a complex complexing agent solution (citrate 2.0mol / L, glutamate 1.0mol / L) as a buffer complexing agent solution; prepare a sodium hydroxide solution with a concentration of 4.0mol / L As a precipitant; firstly pump the sodium hydroxide solution into the reaction kettle, control the temperature of the water bath to 55°C, adjust and control the pH value to 12.0, then pump the mixed solution of the metal cation solution and the complex complexing agent, and control the stirring speed to 600 rpm / min, after aging for 12 hours in a reactor with a temperature of 55°C, the reactant was deionized and washed to a pH of 7.0 to 7.5, and dried at 100°C to obtain (Ni 0.6 Mn 0.2 Co 0.2 )(OH) 2 Precursor. The prepared (Ni 0.6 Mn 0.2 Co 0.2 )(OH) 2 The precursor is...

Example Embodiment

[0045] Example 3

[0046] Prepare NiSO with a concentration of 3.0mol / L 4 ·6H 2 O, CoSO 4 ·7H 2 O, MnSO 4 ·H 2 O mixed solution, wherein the molar ratio of metal cations satisfies Ni 2+ :Co 2+ :Mn 2+ =6:2:2; prepare a complex complexing agent solution (citrate 1.0mol / L, glutamate 2.0mol / L) as a buffer complexing agent solution; prepare a sodium hydroxide solution with a concentration of 3.0mol / L As a precipitant; firstly pump the sodium hydroxide solution into the reactor, control the temperature of the water bath to 60°C, adjust and control the pH value to 12.0, then pump the mixed solution of the metal cation solution and the complex complexing agent, and control the stirring speed to 800 rpm / min, after aging for 24 hours in a reactor at a temperature of 50°C, the reactant was deionized and washed to a pH of 7.0 to 7.5, and dried at 100°C to obtain (Ni 0.6 Mn 0.2 Co 0.2 )(OH) 2 Precursor.

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 composite complexing agent and a method of preparing a lithium-ion power battery cathode precursor material, and belongs to the technical field of lithium-ion cathode materials. The two green organic salts, citrates and glutamates (or glycinates), are combined into the novel composite complexing agent to adjust and control pH value and temperature of a reaction system. Settling reaction level herein is more thorough; the reaction process is milder; settling conversion efficiency is high; the low-cost green production of nickel-rich cathode material precursor (Ni0.6Mn0.2Co0.2)(OH)2 is achieved. The precursor prepared herein has uniform particle morphology; both optimization of the co-precipitating technique and precise control of organic salt complexing agent concentration help greatly reduce the environmental pollution due to reaction wastewater and heavy metal ions, true green production is achieved, and high industrial value is provided.

Description

technical field [0001] The invention relates to the technical field of lithium-ion power battery positive electrode materials, and relates to a composite complexing agent and a composite solution containing the complexing agent for preparing lithium-ion power battery positive electrode precursor materials, in particular to a composite complexing agent and preparation of lithium-ion power batteries. A method for anode precursor materials for power batteries. Background technique [0002] Due to the advantages of high energy density, low self-discharge rate, no memory effect, and green environmental protection, nickel-rich lithium batteries have been widely favored in many fields including new energy vehicles, communications, military, and energy. Cathode materials play a crucial role in the electrochemical performance and safety of lithium-ion batteries, and cathode materials are prepared by sintering their corresponding precursors. Complexing agents are one of the important ...

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
IPC IPC(8): C01G53/00H01M4/505H01M4/525H01M10/0525
CPCC01G53/006C01P2002/72C01P2004/03C01P2004/32C01P2004/61H01M4/505H01M4/525H01M10/0525H01M2004/028Y02E60/10
Inventor 徐立鹏周飞周浩兵王谦之孔继周
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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