Preparation method of rare earth doped LiNi0.5 Mn1.5O4 as anode material for super capacitor

A technology for supercapacitors and cathode materials, which is applied in capacitors, electrolytic capacitors, circuits, etc., can solve the problems of low specific capacity and high cost, and achieve the effects of good crystalline performance, improved conductivity and high purity.

Inactive Publication Date: 2012-01-18
HENAN COAL CHEM IND GROUP INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of low specific capacity and high cost of supercapacitor carbon materials in the prior art, and provide a supercapacitor positive electrode with low cost and energy consumption, high charge and discharge capacity, and high specific power MaterialLiNi 0.5 mn 1.5 o 4 preparation method

Method used

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  • Preparation method of rare earth doped LiNi0.5 Mn1.5O4 as anode material for super capacitor
  • Preparation method of rare earth doped LiNi0.5 Mn1.5O4 as anode material for super capacitor
  • Preparation method of rare earth doped LiNi0.5 Mn1.5O4 as anode material for super capacitor

Examples

Experimental program
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Effect test

Embodiment 1

[0032]A supercapacitor cathode material rare earth doped LiNi 0.5 mn 1.5 o 4 The preparation method comprises the following steps:

[0033] (1) 18650 grams of nickel acetate Ni(CH 3 COO) 2 4H 2 O, 55150 grams of manganese acetate Mn (CH 3 COO) 2 4H 2 O, 6720 g lithium hydroxide LiOH·H 2 O is added in the reaction tank; Add 270Kg of pure water, stir and make it dissolve, obtain solution A;

[0034] (2) Measure 5400 grams of citric acid and 81Kg of purified water respectively, add citric acid into purified water, stir well to obtain an aqueous solution of citric acid; then add 258 grams of cerium oxide and 150 grams of sodium tripolyphosphate and stir well to obtain citric acid , Mixture B of cerium oxide;

[0035] (3) Slowly add solution B to solution A while stirring, and continue stirring for about 20 minutes to obtain solution C;

[0036] (4) Add ammonia water dropwise to solution C, adjust its pH to 5-7, and then stir for 20-40 minutes;

[0037] (5) Put the pH-a...

Embodiment 2

[0041] A supercapacitor cathode material rare earth doped LiNi 0.5 mn 1.5 o 4 The preparation method comprises the following steps:

[0042] (1) 21811 grams of nickel nitrate Ni(NO 3 ) 2 ·6H 2 O, 55150 grams of manganese acetate Mn (CH 3 COO) 2 4H 2 O, 6090 grams of lithium carbonate (Li 2 CO 3 ) into the reaction tank; add 405Kg of pure water, stir to dissolve it, and obtain solution A;

[0043] (2) Measure 5400 grams of citric acid and 135Kg of purified water respectively, add citric acid into purified water, stir well to obtain an aqueous solution of citric acid; then add 245 grams of lanthanum oxide La 2 o 3 , 60 gram sodium hexametaphosphate, fully stir, obtain the mixed solution B of citric acid, lanthanum oxide;

[0044] (3) Slowly add solution B to solution A under stirring, and continue stirring for about 20 minutes to obtain solution C;

[0045] (4) Add ammonia water dropwise to solution C, adjust its pH to 5-7, and then stir for 20-40 minutes;

[0046]...

Embodiment 3

[0050] A supercapacitor cathode material rare earth doped LiNi 0.5 mn 1.5 o 4 The preparation method comprises the following steps:

[0051] (1) 18650 grams of nickel acetate Ni(CH 3 COO) 2 4H 2 O, 55150 grams of manganese acetate Mn (CH 3 COO) 2 4H 2 O, 6200 grams of lithium carbonate (Li 2 CO 3 ) into the reaction tank; add 300Kg of pure water, stir to dissolve it, and obtain solution A;

[0052] (2) Measure 5400 grams of citric acid and 135 Kg of purified water respectively, add citric acid to purified water, and stir evenly to obtain an aqueous solution of citric acid; then add 130.5 grams of dipraseodymium trioxide and 40 grams of sodium pyrophosphate to fully stir to obtain lemon Mixture B of acid and praseodymium trioxide;

[0053] (3) Slowly add solution B to solution A under stirring, and continue stirring for about 20 minutes to obtain solution C;

[0054] (4) Add ammonia water dropwise to solution C, adjust its pH to 5-7, and then stir for 20-40 minutes;...

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Abstract

The invention provides a preparation method of rare earth doped LiNi0.5 Mn1.5O4 as an anode material for a super capacitor. The preparation method comprises the following steps of: respectively taking compounds of Ni, Mn and Li according to the mole ratio that Ni to Mn to Li to rare earth is 1:3.0:(2.05-2.24):(0.003-0.02), adding the compounds of Ni, Mn and Li in a reaction pot and adding pure water to obtain a mixed solution A; based on a target product, respectively taking 6-30% of citric acid, 300-600% of pure water and 0.002-0.01% of dispersing agent, adding the citric acid and the dispersing agent to the pure water, and uniformly stirring; and then adding the rare earth to the aqueous solution of citric acid to obtain a solution B; adding the solution B to the solution A to obtain a solution C; adjusting the pH value of the solution C to 5-7, heating the solution C in a water bath manner to obtain a precursor; and putting the precursor in a metal container and carrying out microwave baking on the precursor to obtain the target product. According to the invention, the conductivity of LiNi0.5 Mn1.5O4 and the energy density of the super capacitor are improved greatly, the preparation process is simplified by adopting a microwave treatment technology, and thus the preparation method is easy for industrial implementation.

Description

technical field [0001] The invention relates to a preparation method of a supercapacitor positive electrode material, in particular to a supercapacitor positive electrode material rare earth doped LiNi 0.5 mn 1.5 o 4 method of preparation. Background technique [0002] The specific capacity of supercapacitors is 20~200 times that of ordinary capacitors, the specific power is usually greater than 1000W / kg, and the cycle life is greater than 10 5 It is a new type of energy storage device with high specific energy of batteries and high specific power of traditional capacitors, which can be charged and discharged quickly. [0003] In order to further increase the energy density of supercapacitors, a new type of capacitor—hybrid supercapacitors has been developed in recent years. In a hybrid supercapacitor, one pole uses conventional battery electrodes to store and convert energy through electrochemical reactions, and the other pole stores energy through an electric double la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042
CPCY02E60/13
Inventor 贾金才曹国喜贾晓琳徐柳蒋元力陈晨
Owner HENAN COAL CHEM IND GROUP INST
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