Lithium-containing metal oxide lithium electricity nanoelectrode materials and preparation method thereof

A lithium metal oxide and nano-electrode technology, which is applied in battery electrodes, nanotechnology, nanotechnology, etc., can solve problems such as nanostructure collapse, particle coarsening, and fusion between particles, so as to reduce energy consumption and production costs , the effect of improving the electrochemical performance

Active Publication Date: 2016-02-03
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects of the existing preparation technology - the problems of nanostructure collapse, particle coarsening and interparticle fusion degree increase during the long-term high-temperature sintering process of lithium-containing transition metal oxides, and solve the problems that restrict lithium ions The key issues of lithium-containing transition metal oxide electrode materials for batteries, such as capacity play and rate performance, provide a high-capacity, high-efficiency preparation method for electrode materials for power lithium-ion batteries

Method used

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  • Lithium-containing metal oxide lithium electricity nanoelectrode materials and preparation method thereof
  • Lithium-containing metal oxide lithium electricity nanoelectrode materials and preparation method thereof
  • Lithium-containing metal oxide lithium electricity nanoelectrode materials and preparation method thereof

Examples

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Effect test

Embodiment 1

[0038] Example 1: Electrochemical lithiation-assisted preparation of lithium manganate nanorods

[0039] 1) Hydrothermal preparation of manganese dioxide nanorods:

[0040] Mn(C with a molar ratio of 1:1 2 h 3 o 2 ) 2 4H 2 O and Na 2 S 2 o 8 Dissolve in 80mL deionized water, stir at a constant speed for half an hour to prepare a 1mol / L aqueous solution, then transfer the obtained uniform solution to a 100ml polytetrafluoroethylene container sealed with a stainless steel container, and place it in a preheated Hydrothermal reaction at 130°C for 12 hours in a drying oven, cooled to room temperature with the furnace, centrifuged and washed three times with deionized water, washed once more with absolute ethanol, dried at 80°C for 10 hours, and finally obtained as attached figure 2 The shown diameter is about 20 ~ 100nm β-MnO 2 Nano stave.

[0041] 2) Manganese dioxide nanorod electrode preparation and battery assembly:

[0042] β-MnO 2 Nanorods (90%) were uniformly mi...

Embodiment 2

[0047] Example 2: Porous LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 Electrochemical lithiation-assisted preparation of nanospheres

[0048] 1) (Ni 1 / 3 co 1 / 3 mn 1 / 3 )CO 3 Hydrothermal preparation of nanospheres:

[0049] Ni(C with a molar ratio of 1:1:1 2 h 3 o 2 ) 2 4H 2 O, Co (C 2 h 3 o 2 ) 2 4H 2 O and Mn(C 2 h 3 o 2 ) 2 4H 2 O was dissolved in 80mL of a mixed solution of deionized water and ethylene glycol (volume mixing ratio between 0.5 and 1.5), stirred at a constant speed for half an hour to obtain a mixed solution of 0.2 to 0.8 mol / L, and 0.016 to 0.064 After mol urea, transfer the obtained homogeneous solution into a 100ml polytetrafluoroethylene container sealed with a stainless steel container, place it in a preheated drying oven, and conduct a hydrothermal reaction at 130-200°C for 10-24 hours. After cooling to room temperature, it was centrifuged and washed three times with deionized water, washed once more with absolute ethanol, and dried at 80°C for 10 h...

Embodiment 3

[0058] Example 3: xLi 2 MnO 3 ·(1-x)LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 Electrochemical Lithiation Assisted Preparation of (0

[0059] 1) (Ni (1-x) / 3 co (1-x) / 3 mn (1+2x) / 3 )CO 3 Hydrothermal preparation of nanospheres:

[0060] Ni(C 2 h 3 o 2 ) 2 4H 2 O, Co (C 2 h 3 o 2 )2 4H 2 O and Mn(C 2 h 3 o 2 ) 2 4H 2 O was dissolved in 80mL of a mixed solution of deionized water and ethylene glycol (volume mixing ratio between 0.5 and 1.5), stirred at a constant speed for half an hour to obtain a mixed solution of 0.2 to 0.8 mol / L, and 0.016 to 0.064 After mol urea, transfer the obtained homogeneous solution into a 100ml polytetrafluoroethylene container sealed with a stainless steel container, place it in a preheated drying oven, and conduct a hydrothermal reaction at 130-200°C for 10-24 hours. After cooling to room temperature, centrifuge and wash three times with deionized water, wash once more with absolute ethanol, and dry at 80°C for 10 hours to fi...

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Abstract

The invention discloses lithium-containing metal oxide lithium electricity nanoelectrode materials and a preparation method thereof. Nanostructure metal oxide synthesized at low temperature through a water heating method, a solvent heating method, a sol-gel method and the like is subjected to pre-lithiation, and therefore the temperature at which a lithium-containing metal oxide crystal structure is formed and develops is effectively lowered, needed time is effectively shortened, the proportion and the mixed arranging degree of Li+ and transition metal ions in lithium-containing transition metal oxide can be effectively controlled, and the nanoscale and the structure of the metal oxide can be kept. Energy consumption in the material preparation process is greatly reduced, cost is reduced, meanwhile high-efficiency and high-rate lithium-containing transition metal oxide positive and negative materials can be obtained, and therefore the electrochemical pre-lithiation preparation method is an environment-friendly controlled preparation method of nano lithium-containing transition metal oxide nanostructure electrode materials.

Description

technical field [0001] The invention relates to a lithium metal oxide lithium battery nano electrode material and a low-temperature preparation method thereof, in particular to an electrochemical prelithiation preparation technology of a lithium transition metal oxide nanostructure electrode material. Background technique [0002] Today's human society is in a stage of high energy consumption. Fossil energy such as oil and natural gas is rapidly depleted, and energy crisis and environmental pollution are becoming more and more serious. Therefore, environmentally friendly new energy technologies such as solar energy, wind energy, biomass energy, and tidal energy have attracted much attention. Our country A large number of solar, wind and tidal power plants have also been built in many places. However, due to the instability of the electrodes emitted by solar energy, wind energy and tidal energy, they cannot enter thousands of households and various enterprises and institution...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525H01M4/485H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/485H01M4/505H01M4/525H01M10/0525H01M2004/021Y02E60/10
Inventor 黄镇东马延文张坤冯晓苗刘瑞卿李谊林秀婧
Owner NANJING UNIV OF POSTS & TELECOMM
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