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Lithium ion battery anode material Li3VO4 and preparation method thereof

A technology of lithium ion battery and negative electrode material, which is applied in the field of electrochemical power supply, can solve problems such as no report on electrochemical performance research, and achieve the effects of good crystallization performance, high sample purity and low material preparation cost.

Inactive Publication Date: 2013-12-25
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And Li 3 VO 4 The electrochemical properties of Li-ion battery electrode materials have not been reported yet

Method used

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  • Lithium ion battery anode material Li3VO4 and preparation method thereof
  • Lithium ion battery anode material Li3VO4 and preparation method thereof
  • Lithium ion battery anode material Li3VO4 and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] First weigh lithium carbonate and vanadium pentoxide at a molar ratio of 3:1, then weigh 5 moles of hexamethylenetetramine, mix and add excess distilled water to stir evenly, transfer to 120°C hydrothermal ax for reaction for 24 Hours, the reaction product was transferred to a Petri dish for drying. Place the dried product in a crucible or a quartz boat, and move the crucible or quartz boat into a high-temperature tube furnace, calcinate at 500°C for 5 hours under air conditions, and naturally cool to obtain Li 3 VO 4 sample. The results show that if figure 1 As shown, the prepared sample was analyzed as pure Li by XRD pattern 3 VO 4 , corresponding to the XRD card JCPDS, No. 38-1247, the lattice constant is a =0.6319 nm, b=0.5448 nm, c = 0.4940 nm; at 16.3 o , 21.6 o , 22.9 o , 24.4 o , 28.2 o , 32.8 o , 36.3 o , 37.6 o , 42.7 o , 49.8 o , 58.7 o , 66.2 o and 70.9 o The diffraction peaks correspond to the Li 3 VO 4 (100), (110), (011), (101), (...

Embodiment 2

[0019] First weigh lithium carbonate and vanadium pentoxide at a molar ratio of 2:1, then weigh 2 moles of hexamethylenetetramine, mix and add excess distilled water to stir evenly, transfer to 120°C hydrothermal ax for reaction for 30 Hours, the reaction product was transferred to a Petri dish for drying. Place the dried product in a crucible or a quartz boat, and move the crucible or quartz boat into a high-temperature tube furnace, calcinate at 400°C for 8 hours under air conditions, and naturally cool to obtain Li 3 VO 4 sample.

Embodiment 3

[0021] First weigh lithium carbonate and vanadium pentoxide at a molar ratio of 5:1, then weigh 9 moles of hexamethylenetetramine, mix and add excess distilled water to stir evenly, transfer to 120°C hydrothermal ax for reaction for 12 Hours, the reaction product was transferred to a Petri dish for drying. Place the dried product in a crucible or a quartz boat, and move the crucible or quartz boat into a high-temperature tube furnace, calcinate at 700°C for 2 hours under air conditions, and naturally cool to obtain Li 3 VO 4 sample.

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Abstract

The invention provides a Li3VO4 cathode anode material and a preparation method thereof, particularly a novel lithium ion battery anode material Li3VO4 prapared by carrying out hydrothermal reaction on vanadium pentoxide, lithium carbonate and hexamethylenetetramine used as precursors. The hydrothermal reaction is utilized to prepare an intermediate phase product, and the intermediate phase product is gradually subjected to solid-phase reaction while reaction energy is supplied by high temperature heating, thereby finally obtaining the Li3VO4 with favorable crystallinity. The first charge and discharge capacities of the Li3VO4 are respectively 523 and 423 mAh / g, and the charge and discharge capacities after 100 loops are still 398 mAh / g; and the grain size is uniform, and is less than 200nm.

Description

technical field [0001] The present invention relates to a kind of novel lithium ion battery anode material, particularly a kind of Li 3 VO 4 The preparation method and lithium storage characteristics thereof belong to the field of electrochemical power sources. Background technique [0002] Lithium-ion batteries are the third generation of small batteries after nickel-cadmium batteries and nickel-hydrogen batteries. They have high working voltage, large specific energy, stable discharge potential curve, small self-discharge, long cycle life, good low temperature performance, no memory, Pollution and other advantages, can meet the miniaturization, light weight, pollution-free requirements of portable electronic products. Lithium-ion batteries are not only widely used in electronic products such as mobile communication devices and notebook computers, but also ideal power sources for future electric vehicles such as electric vehicles and electric bicycles. In addition, lithi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48
CPCY02E60/10
Inventor 倪世兵吕小虎杨学林
Owner CHINA THREE GORGES UNIV
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