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Shape control synthesis method of LiMnPO4 electrode materials

A technology of electrode material and synthesis method, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of complex operation, high production cost, and high control precision, and achieve the effect of simple synthesis process, low equipment requirements, and uniform particle size

Active Publication Date: 2014-06-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve existing synthetic LiMnPO 4 The production cost that the method exists is high, operation is complicated, and requires the problem of high control precision, and provides a kind of LiMnPO 4 Shape-controlled synthesis of electrode materials

Method used

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  • Shape control synthesis method of LiMnPO4 electrode materials
  • Shape control synthesis method of LiMnPO4 electrode materials
  • Shape control synthesis method of LiMnPO4 electrode materials

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specific Embodiment approach 1

[0016] Specific embodiment one: this embodiment is a kind of LiMnPO 4 The shape-controlled synthesis method of the electrode material is specifically completed according to the following steps:

[0017] 1. Add manganese salt to Na with a concentration of 0.1mol / L~1mol / L at a stirring speed of 800rpm~1200rpm 2 S·9H 2 O aqueous solution, mix evenly to obtain a mixed solution with a manganese ion concentration of 0.1mol / L to 3mol / L, then sequentially add lithium salt and phosphate into the mixed solution, and then continue to stir and react at a stirring speed of 800rpm to 1200rpm for 5min~ 60min, that is, the obtained suspension solution; 2. First, seal the suspension solution prepared in step 1 in the reaction kettle, and keep it warm at 120°C-220°C for 0.5h-10h, and then cool to room temperature to obtain the reaction product; 3. The reaction product obtained in step 2 is sequentially subjected to solid-liquid separation, washing, and drying to obtain LiMnPO 4 electrode mat...

specific Embodiment approach 2

[0022] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the manganese salt described in step one is manganese sulfate, manganese chloride or manganese acetate; The lithium salt described in step one is lithium sulfate, chlorine Lithium chloride, lithium nitrate or lithium acetate; the phosphate ammonium dihydrogen phosphate or potassium dihydrogen phosphate described in step one. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0023] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the reaction kettle described in step 2 is a stainless steel reaction kettle lined with polytetrafluoroethylene. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a shape control synthesis method of LiMnPO4 electrode materials and relates to a synthesis method of the LiMnPO4 electrode materials. The invention aims at solving the problems that the production cost of the existing LiMnPO4 synthesis method is high, the operation is complicated, and in addition, the required control precision is high. The method comprises the following steps of: 1, adopting manganese salts, Na2S.9H2O, lithium salts, phosphates and deionized water to prepare suspension solution; 2, sealing the suspension solution in a reaction kettle, carrying out heat insulation for a certain time, then, cooling the materials to room temperature, and obtaining reaction products; and 3, sequentially carrying out solid-liquid separation, washing and drying on the reaction products, and obtaining LiMnPO4 electrode materials. The shape control synthesis method is mainly used for preparing the LiMnPO4 electrode materials.

Description

technical field [0001] The present invention relates to a LiMnPO 4 Synthesis of electrode materials. Background technique [0002] LiMnPO 4 It is an important electrode material for lithium-ion batteries. Compared with the current commercialized LiCoO 2 The material has many advantages such as low preparation cost, high thermal and electrochemical stability, high energy density and good environmental compatibility, and is one of the hot spots in the research of electrode materials at present. Since the electrochemical performance of electrode materials strongly depends on factors such as its morphology, structure, and size, LiMnPO 4 The research on the morphology-controlled synthesis of electrode materials is of great significance to realize its excellent electrochemical performance, and has been paid great attention by the majority of lithium battery scientists and technicians. [0003] In recent years, a variety of LiMnPO with different morphologies 4 Electrode materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58
CPCY02E60/12Y02E60/10
Inventor 徐成彦潘晓亮甄良
Owner HARBIN INST OF TECH