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Preparation method of spinel type lithium manganate or lithium nickel manganese oxide

A type of lithium manganese oxide and lithium nickel manganese oxide technology, which is applied in the field of lithium-ion battery cathode materials, can solve problems such as poor crystal structure consistency and achieve good structural consistency

Active Publication Date: 2016-08-31
BEIJING JINGJINGXING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The embodiment of the present invention discloses a preparation method of spinel lithium manganese oxide or lithium nickel manganese oxide, which is used to solve the crystal structure consistency when preparing spinel lithium manganate or lithium nickel manganese oxide by solid phase synthesis bad question

Method used

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  • Preparation method of spinel type lithium manganate or lithium nickel manganese oxide
  • Preparation method of spinel type lithium manganate or lithium nickel manganese oxide

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Embodiment 1

[0047] According to the ratio of Li:Mn=1:1.8, weigh 11.1g (0.15mol) lithium carbonate and 62g (0.54mol) manganese carbonate, dissolve in 70mL water, weigh 4.4g according to 6% of the total weight of lithium carbonate and manganese carbonate Cotton pulp (CP1000u type cotton pulp produced by Shandong Gaomi Chemical Fiber Group Co., Ltd.), was added to water, stirred evenly to obtain a colloidal suspension, and then the colloidal suspension was dried at 110°C for 14 hours to obtain a precursor, and then The precursor is placed in a sagger and calcined at 800°C for 4 hours to obtain spinel lithium manganate.

Embodiment 2

[0049] According to the ratio of Li:Mn=1:2, take by weighing 11.1g (0.15mol) lithium carbonate and 69g (0.6mol) manganese carbonate, take by weighing 2.4g cotton pulp according to 3% of lithium carbonate and manganese carbonate gross weight, will The three are ball milled in a ball mill for 10 hours, and then calcined at 800°C for 4 hours to obtain spinel lithium manganate.

Embodiment 3

[0051] According to the ratio of Li:Ni:Mn=1:0.5:1.5, take by weighing 6.9g (0.1mol) lithium nitrate, 14.5g (0.05mol) nickel nitrate (hexahydrate nickel nitrate), 17.2g (0.15mol) manganese carbonate, Dissolve in 40mL water, weigh 0.39g wood pulp fiber according to lithium nitrate, nickel nitrate and manganese carbonate and 1% of the total weight (Lot145444-black needle pulp produced by Russia Ilim Company provided by Sinotrans Storage and Transportation Co., Ltd.), add Put it into water, stir evenly to obtain a colloidal suspension, then dry the colloidal suspension at 110°C for 14 hours, and then calcinate at 800°C for 4 hours to obtain spinel lithium nickel manganese oxide.

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Abstract

The embodiment of the invention discloses a preparation method of spinel type lithium manganate or lithium nickel manganese oxide. The method includes: mixing a lithium source, a substance M and a base material to obtain a precursor; and conducting calcination treatment on the precursor to obtain a target product. The substance M includes a manganese source, or the substance M includes a manganese source and a nickel source, under the circumstance that the substance M includes the manganese source, the target product is spinel type lithium manganate, and under the circumstance that the substance M includes the manganese source and the nickel source, the target product is spinel type lithium nickel manganese oxide. The base material is plant fiber with a hollow structure, preferably at least one of wood pulp fiber and cotton pulp, and the weight of the base material is not less than 1% of the total weight of the lithium source and the substance M. The scheme ensures that in a calcination process, the precursor at different positions can contact oxygen more uniformly, so that the spinel type lithium manganate or lithium nickel manganese oxide has good structural consistency.

Description

technical field [0001] The invention relates to the field of positive electrode materials for lithium ion batteries, in particular to a method for preparing spinel-type lithium manganese oxide or lithium nickel manganese oxide. Background technique [0002] Spinel-type lithium manganese oxide and spinel-type lithium nickel manganese oxide are currently more common cathode materials for commercial lithium batteries. Among them, the spinel-type lithium manganate has a spinel structure, and the chemical formula of the stoichiometric lithium manganate is LiMn 2 o 4 , belonging to the cubic crystal system, with Fd-3m (227) symmetry. Its unit lattice has 32 oxygen and 8 tetrahedral positions (8a) and 16 octahedral positions (16d) composed of them. , manganese ions are in the 16d position of the octahedron, and the 16d positions are respectively covered by Mn 3+ and Mn 4+ Occupied, the molar ratio between them is 1:1, and the 16c position of the octahedron is vacant. When 1 / 4...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M10/0525C01G45/12
CPCC01G45/12H01M4/364H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 吴超杨冬晴杨晓晶
Owner BEIJING JINGJINGXING TECH CO LTD
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