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Solid melt method for manufacturing lithium-intercalated layered multielement complex

A layered and solid solution technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of inability to accurately control the ratio of raw materials, inability to produce in batches, long synthesis process routes, etc.

Inactive Publication Date: 2012-07-11
ZHUZHOU TAIHE HIGH TECH
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  • Description
  • Claims
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Problems solved by technology

These methods either have a long synthetic process route, or cannot accurately control the ratio of raw materials, or cannot produce in batches, all of which have certain limitations.

Method used

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  • Solid melt method for manufacturing lithium-intercalated layered multielement complex
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  • Solid melt method for manufacturing lithium-intercalated layered multielement complex

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Embodiment Construction

[0008] Solid solution method to produce lithium-intercalated layered multi-component composites (Ni, Co, Mn) Preparation: Cobalt, nickel, manganese and other element oxides are used as raw materials, mixed with battery-grade lithium carbonate in a certain proportion, calcined at high temperature, crushed, sieved After separate treatment, Li(Mn-Ni-Co)O2 ternary material powder was obtained. The particle size distribution of the product was analyzed with a laser particle size analyzer (LS230, Coulter, USA); the crystal phase structure of the product was analyzed with an X-ray diffractometer (D / max-rB, Rigaku Corporation, Japan); scanning electron microscopy (S- 3500N) to observe its microstructure.

[0009] Manganese and nickel sources are used as raw materials, respectively mixed with cobalt oxide (~5μm)) and battery grade lithium carbonate according to n(Li):n(Mn):n(Ni):n(Co) =1.10:1 / 3:1 / 3 : 1 / 3 mixed, calcined at 1000°C for 20 h to obtain the ternary system product LiMn 1 / ...

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Abstract

The embodiment of the invention discloses a solid melt method for manufacturing a lithium-intercalated layered multielement complex (Ni, Co and Mn). The method is characterized in that a lot of Mn is used, so that the lithium-intercalated layered multielement complex is relatively cheap; and LiCoO2 cannot be used as an anodic material independently, but through expansion and shrinkage of the LiCoO2, an electrode structure is more stable. In combination of the existing mature technologies of LiCoO2, LiNiO2 and LiMnO2, the LiCoO2, the LiNiO2 and the LiMnO2 are produced independently and prepared into a solid melt (at the solid melt forming temperature of 700 DEG C) according to a certain ratio; the properties of the LiCoO2, the LiNiO2 and the LiMnO2 are complementary; and the prepared anode material is stable in performance. The synthetic solid melt method is a simple method for modifying the LiCoO2 and successfully preparing a multielement (Ni, Co and Mn) layered lithium-intercalated material; the method is reliable, practical and mature and is most applicable to industrial scale production; and the performance of the product is stable.

Description

technical field [0001] The invention relates to the production of a lithium intercalation layered multi-component compound (Ni, Co, Mn) by a solid solution method, which is a cathode material of a lithium ion battery and belongs to the technical field of the lithium ion battery. Background technique [0002] The widespread application of portable electronic products such as mobile phones, notebook computers, digital cameras, digital video cameras, and electric tools in the market has driven the rapid development of the lithium-ion battery industry. Although lithium cobalt oxide is still the most widely used cathode material for lithium-ion batteries, its capacity and safety performance have gradually become difficult to meet the needs with the continuous improvement of people's expectations for high-energy battery performance. The monopoly has caused the price of cobalt to soar, and the lithium battery market urgently needs the emergence of lithium cobalt oxide substitutes. ...

Claims

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Application Information

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IPC IPC(8): H01M4/525H01M4/505
CPCY02E60/122Y02E60/10
Inventor 郑圣泉陈红雨李中奇
Owner ZHUZHOU TAIHE HIGH TECH
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