Positive material rock salt Mn lithium of nano lithium ion battery and its making method

A technology for lithium-ion batteries and positive electrode materials, applied in electrode manufacturing, battery electrodes, chemical instruments and methods, etc., can solve the problems of environmental pollution, safety, high price, and low specific capacity, and achieve good safety, low price, and preparation The effect of simple method

Inactive Publication Date: 2008-08-06
XIAMEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Lithium cobalt oxide has achieved great commercial success as a cathode material for lithium-ion batteries, but there are problems with high price, low specific capacity, environmental pollution and safety.

Method used

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  • Positive material rock salt Mn lithium of nano lithium ion battery and its making method
  • Positive material rock salt Mn lithium of nano lithium ion battery and its making method
  • Positive material rock salt Mn lithium of nano lithium ion battery and its making method

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1: 7.6g manganese sulfate hexahydrate (MnSO 4 ·6H 2 O) was dissolved in 100mL deionized water, and poured into 120mL 0.03mol / L potassium permanganate (KMnO 4 ) aqueous solution, stirred and reacted for 2 hours, filtered and washed until neutral, and dried at 120° C. for 12 hours to obtain a precursor. Weigh 1.0g of the precursor, pour it into a solution containing 1.0mol / L lithium hydroxide (LiOH) and 0.05mol / L ammonium persulfate ((NH 4 ) 2 S 2 o 8 ) in a hydrothermal kettle, after treatment at 180°C for 24h, the resulting precipitate was filtered and washed to neutral and dried at 120°C for 24h to obtain the lithium ion cathode material Li 2 MnO 3 (See Figure 1). Its particle size is 10-150nm (see Figure 2). According to the positive electrode material: acetylene black: binder = 80:10:10 (mass ratio), ball milling and mixing, coating on the treated aluminum foil, drying at 120 ° C, pressing and molding at 20 MPa to obtain Li 2 MnO 3 electrode.

Embodiment 2

[0028] Embodiment 2: 5.8g manganese chloride tetrahydrate (MnCl 2 4H 2 O) dissolved in 100mL deionized water, and poured into 120mL 0.03mol / L KMnO 4 In aqueous solution, with reference to embodiment 1, prepare lithium ion cathode material Li 2 MnO 3 . And prepare Li with reference to Example 1 2 MnO 3 electrode.

Embodiment 3

[0029] Embodiment 3: 3.4mL manganese nitrate aqueous solution (Mn(NO 3 ) 2 , 50wt%) was diluted in 100mL deionized water, and poured into 120mL 0.03mol / L KMnO 4 In aqueous solution, with reference to embodiment 1, prepare lithium ion cathode material Li 2 MnO 3 . And prepare Li with reference to Example 1 2 MnO 3 electrode.

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Abstract

A nano-scale lithium-ion battery anode material rock salt type lithium manganese oxide and a preparation method thereof are provided. The present invention relates to a lithium-ion battery anode material, in particular to a nano-scale lithium-ion battery anode material rock salt type lithium manganese oxide and a preparation method thereof. The present invention provides a nano-scale lithium-ion battery anode material rock salt type lithium manganese oxide which is high in activity, high in discharge capacity and can be prepared through a hydrothermal method, as well as a preparation method thereof. The nano-scale lithium-ion battery anode material rock salt type lithium manganese oxide is Li2-XHXMnO3 (X is more than 0, and less than or equal to 0.5). Oxidative manganese salt is adopted as oxidant; the obtained precipitate is transferred into a hydrothermal reactor containing lithium hydroxide (LiOH) solution; or the oxidant, manganese salt and LiOH solution are directly mixed, stirred and transferred into the hydrothermal reactor; the hydrothermal reactor is treated at 140-250 DEG C, and the obtained precipitate is filtered, washed and dried, so as to obtain the nano-scale lithium-ion battery anode material rock salt type lithium manganese oxide.

Description

technical field [0001] The invention relates to a lithium ion battery positive electrode material, in particular to a nanoscale lithium ion battery positive electrode material rock salt type lithium manganese oxide and a preparation method thereof. Background technique [0002] Lithium cobalt oxide has achieved great commercial success as a cathode material for lithium-ion batteries, but there are problems of high price, low specific capacity, environmental pollution and safety. Therefore, many scientists and technicians are working hard to find alternative materials for lithium cobalt oxide. Lithium manganate, such as spinel lithium manganate (LiMn 2 o 4 ), monoclinic lithium manganate (m-LiMnO 2 ) and orthorhombic lithium manganate (o-LiMnO 2 ) and other factors such as low price, environmental friendliness and good safety performance have been widely studied. In recent years, rock salt lithium manganate (Li 2 MnO 3 ) began to draw attention. In the early days, it ...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M4/48H01M4/04C01D15/00C01G1/02C01G45/00H01M4/505
CPCY02E60/10
Inventor 杨勇黄行康岳红军
Owner XIAMEN UNIV
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