Preparation method of zero-strain hybrid LTO lithium battery cathode material and lithium battery cathode including cathode material

A negative electrode material, lithium battery technology, applied in battery electrodes, nanotechnology for materials and surface science, secondary batteries, etc., can solve volume changes and other problems, to solve volume changes, shorten diffusion distance, and prolong cycle life Effect

Inactive Publication Date: 2018-02-02
JIANGHAN UNIVERSITY
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of a zero-strain hybrid LTO lithium battery negative electrode material and a lithium battery negative electrode containing the negative electrode material. The negative electrode material can effectively solve the volume change problem of the lithium battery during charging and discharging, and solve the problem of The key to extending the cycle life of lithium batteries

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of zero-strain hybrid LTO lithium battery cathode material and lithium battery cathode including cathode material
  • Preparation method of zero-strain hybrid LTO lithium battery cathode material and lithium battery cathode including cathode material
  • Preparation method of zero-strain hybrid LTO lithium battery cathode material and lithium battery cathode including cathode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: with AgNO 3 As a metal dopant, the specific preparation method of the zero-strain hybrid LTO lithium battery negative electrode material is as follows:

[0032] (1) Weigh Li according to the molar ratio n(Li):n(Ti)=4:5 2 CO 3 (AR) and TiO 2 (AR), placed in a tube furnace for roasting, in an argon atmosphere, the temperature was raised to 800 °C at 5 °C / min, kept for 12 hours, and then cooled to room temperature with the furnace, and the pure phase Li was obtained after ball milling and sieving. 4 Ti 5 o 12 (LTO), where Li 2 CO 3 (AR) Excessive 2% to make up for the loss of lithium element during high temperature heating;

[0033] (2) the pure phase Li 4 Ti 5 o 12 : AgNO 3 =9.5:0.5 (mass ratio) uniformly mixed, placed in a tube furnace with an argon atmosphere and calcined at 800°C for 4 hours, and cooled naturally to obtain the zero-strain hybrid LTO lithium battery anode material Ag / Li 4 Ti 5 o 12 (Ag / LTO);

[0034] The whole experiment is based...

Embodiment 2

[0036] Embodiment 2: remove Li in the implementation process 4 Ti 5 o 12 : AgNO 3 Except that =9.9:0.1 (mass ratio) is different, all the other are the same as in Example 1.

Embodiment 3

[0037] Embodiment 3: remove Li in the implementation process 4 Ti 5 o 12 : AgNO 3 Except that =9.8:0.2 (mass ratio) is different, all the other are the same as embodiment 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation method of a zero-strain hybrid LTO lithium battery cathode material and a lithium battery cathode including the cathode material. The preparation method comprisesthe following steps: firstly, roasting Li2CO3 and TiO2, then cooling to the room temperature, and dispersing to obtain pure-phase Li4Ti5O12; and then calcining pure-phase Li4Ti5O12 with metal dopants, and naturally cooling to obtain the zero-strain hybrid LTO lithium battery cathode material. According to the scheme of the invention, the zero-strain hybrid LTO lithium battery cathode material isprepared by using a high temperature solid state method, metal particles generated by high-temperature decomposition of the metal dopants are attached to the surfaces of Li4Ti5O12 particles, the addition of the metal particles does not change the spinel structure of Li4Ti5O12, but increases the conductivity of the particles, and thus the electrode polarization of Li4Ti5O12 can be reduced, the electrode resistance of the cathode material can be effectively reduced, and the electrochemical performance can be greatly improved.

Description

technical field [0001] The invention relates to the field of lithium battery materials, in particular to a preparation method of a zero-strain hybrid LTO lithium battery negative electrode material and a lithium battery negative electrode containing the negative electrode material. Background technique [0002] Li 4 Ti 5 o 12 (LTO) is a negative electrode material for lithium-ion batteries. Compared with carbon material negative electrodes, LTO is highly safe and stable, so it has become a candidate material for safe lithium-ion battery negative electrodes. As an anode material, LTO has a stable discharge voltage platform (1.55V vs Li + / Li) and there is almost no change in volume during charging and discharging, and it has a "zero strain" characteristic, so it has very good cycle performance. The chemical diffusion coefficient of LTO at room temperature is an order of magnitude higher than that of carbon anode materials, and the charge and discharge speed is very fast. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityApplications(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/62H01M10/0525H01M4/131H01M4/1391B82Y30/00
CPCB82Y30/00H01M4/131H01M4/1391H01M4/364H01M4/485H01M4/626H01M4/628H01M10/0525Y02E60/10
Inventor程琦赵金星兰倩刘畅汤舜梁济元曹元成
OwnerJIANGHAN UNIVERSITY