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Process for preparing nickel-cobalt-based multi-element electrode material from cobalt slag

An electrode material, nickel-cobalt-based technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of poor thermal stability, poor reproducibility, difficult synthesis, etc., and achieve the effect of improving performance, low cost, and simple process

Inactive Publication Date: 2017-11-10
SHAANXI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although LiNiO 2 It has problems such as difficult synthesis, poor thermal stability, and poor reproducibility. However, with the deepening of research, through optimization of synthesis conditions and doping modification, high thermal stability, large specific capacity, and good cycle performance will be obtained. Large-scale industrial production of LiNiO 2 A series of cathode materials for lithium batteries [Liang Li, Li Qi, Qiao Qingdong, et al.

Method used

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  • Process for preparing nickel-cobalt-based multi-element electrode material from cobalt slag
  • Process for preparing nickel-cobalt-based multi-element electrode material from cobalt slag

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Embodiment Construction

[0020] The present invention will be further described in detail below in conjunction with specific embodiments.

[0021] A kind of technology that prepares nickel-cobalt base multiple electrode material with cobalt slag, comprises the following steps:

[0022] (1) dissolving the cobalt slag with hydrochloric acid to obtain a chloride salt solution containing nickel chloride and cobalt chloride, wherein the cobalt slag is the cobalt slag produced during purification in the process of hydrometallurgical production of nickel;

[0023] (2) Preparation of precursor sol

[0024] Adding lithium nitrate into the chloride salt solution, adding a colloidal growth inhibitor, adding a linear polymer material, and stirring evenly to obtain a precursor sol. The formulation of the sol is shown in Table 2.

[0025] (3) Concentrating the precursor sol obtained in step (2) at 80°C, and then putting it into a twin-roll spinning machine to obtain a fibrous electrode material precursor;

[002...

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Abstract

The invention discloses a process for a nickel-cobalt based multinary electrode material by using cobalt slag. The process is characterized by comprising the following steps of: dissolving the cobalt slag by using hydrochloric acid to obtain a chloride solution containing nickel chloride and cobalt chloride; adding lithium nitrate, a grain growth inhibitor and a linear macromolecule material; uniformly stirring the mixture to obtain a precursor sol; and carrying out concentration, dual-roller thread throwing and calcination of the sol to obtain the nickel-cobalt based multinary electrode material. According to the process, industrial slag is utilized for preparing the electrode material with high added value, and the process has the characteristics of simplicity, low cost, good product performance and the like.

Description

technical field [0001] The invention relates to a battery electrode manufacturing technology, in particular to a preparation method of a nickel-cobalt-based multi-element electrode material for a lithium battery. Background technique [0002] Lithium-ion batteries (lithium batteries) use carbon materials instead of metal lithium as the negative electrode, which avoids the safety problems of using metal lithium. It is known as a new generation of green batteries. It has high capacity, good safety, good cycle performance, and no memory effect. and non-polluting advantages. [0003] Cathode material is one of the key materials for manufacturing lithium batteries, accounting for more than 25% of the battery cost, and its performance directly affects various performance indicators of the battery, occupying a core position in lithium batteries. LiNiO as cathode material for lithium batteries 2 It has the advantages of large discharge capacity, low price, and little environmental...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/525H01M4/62
CPCH01M4/525H01M4/62H01M4/625Y02E60/10
Inventor 谭宏斌马小玲杨建锋王波郭从盛董洪峰景然李闯
Owner SHAANXI UNIV OF TECH