Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Pre-lithium negative electrode material, preparation method thereof, pre-lithium negative electrode and pre-lithium battery

A negative electrode material and pre-lithium technology, which is applied in the field of new energy, can solve the problems of reduced pre-lithium effect and metal lithium deterioration, and achieve the effects of reducing quantity consumption, saving production costs, and controllable methods

Active Publication Date: 2022-04-29
SVOLT ENERGY TECHNOLOGY CO LTD
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this process, the longer the metal lithium is exposed to the air, the more serious the deterioration of the metal lithium (may react with nitrogen, oxygen, etc.)

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] This embodiment provides a pre-lithium negative electrode material and a preparation method thereof. The preparation method specifically includes the following steps:

[0048] 10 g of graphite powder and 0.0237 g of lithium ribbon were weighed in a glove box. Pour 100 mL of n-hexane into the reactor (200 mL in volume), and then fill the reactor with argon to protect the reactor with an inert atmosphere. Add the weighed graphite powder and lithium strip into the reactor, tighten it to confirm that the seal is intact and there is no air in the reactor, then put the reactor into a three-dimensional vibration oven, set the vibration frequency of the oven in the three-dimensional direction to 0.05Hz, and then The temperature was raised to 190°C and kept at a constant temperature for 48h. After the constant temperature is finished, wait until the temperature drops to 60°C, recover the n-hexane in the reactor, and finally take out the powder material in the reactor.

Embodiment 2

[0050] This embodiment provides a pre-lithium negative electrode material and a preparation method thereof. The preparation method specifically includes the following steps:

[0051] 10 g of graphite powder and 0.0594 g of lithium ribbon were weighed in the glove box. Pour 100 mL of n-hexane into the reactor (200 mL in volume), and then fill the reactor with argon to protect the reactor with an inert atmosphere. Add the weighed graphite powder and lithium strip into the reactor, tighten it to confirm that the seal is intact and there is no air in the reactor, then put the reactor into a three-dimensional vibration oven, set the vibration frequency of the oven in the three-dimensional direction to 0.05Hz, and then The temperature was raised to 200°C and kept at a constant temperature for 50h. After the constant temperature is finished, wait until the temperature drops to 60°C, recover the n-hexane in the reactor, and finally take out the powder material in the reactor.

Embodiment 3

[0053] This embodiment provides a pre-lithium negative electrode material and a preparation method thereof. The preparation method specifically includes the following steps:

[0054] 10 g of graphite powder and 0.0878 g of lithium ribbon were weighed in a glove box. Pour 100 mL of n-hexane into the reactor (200 mL in volume), and then fill the reactor with argon to protect the reactor with an inert atmosphere. Add the weighed graphite powder and lithium strip into the reactor, tighten it to confirm that the seal is intact and there is no air in the reactor, then put the reactor into a three-dimensional vibration oven, set the vibration frequency of the oven in the three-dimensional direction to 0.05Hz, and then The temperature was raised to 200°C and kept at a constant temperature for 55h. After the constant temperature is finished, wait until the temperature drops to 60°C, recover the n-hexane in the reactor, and finally take out the powder material in the reactor.

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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a pre-lithium negative electrode material, a preparation method thereof, a pre-lithium negative electrode and a pre-lithium battery. The method comprises: 1) dispersing the negative electrode active material and metal lithium in an organic solvent to obtain a mixed solution; 2) using the mixed solution to carry out hydrothermal reaction to obtain a pre-lithium negative electrode material. The present invention utilizes a hydrothermal high-temperature and high-pressure environment to fully and evenly embed lithium metal into the structure of negative electrode active materials such as graphite materials, and has a good pre-lithium effect. Using the pre-lithium negative electrode material as a negative electrode active material for lithium-ion batteries can Effectively reduce the consumption of active lithium ions in the positive electrode and improve the electrochemical performance of the negative electrode, especially the first Coulombic efficiency.

Description

technical field [0001] The invention relates to the technical field of new energy, and relates to a pre-lithium negative electrode material, a preparation method thereof, a pre-lithium negative electrode and a pre-lithium battery. Background technique [0002] Conventional lithium-ion batteries suffer from the loss of active lithium ions during charge-discharge cycles. Different battery systems have different rates of loss of lithium ions. For example, the high nickel ternary positive electrode material / silicon oxygen negative electrode material system has a faster loss rate of active lithium ions. From a mechanistic point of view, the loss of active lithium ions may be caused by structural attenuation of positive and negative active materials and side reactions at the interface. The consequence of the loss of active lithium ions is a decrease in battery capacity and a shortened cycle life. [0003] In response to the above problems, the current technical means include imp...

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 & Authority Patents(China)
IPC IPC(8): H01M4/587H01M4/133H01M10/0525
CPCH01M4/587H01M4/133H01M10/0525H01M2004/021H01M2004/027Y02E60/10
Inventor 朱金鑫刘浩娄帅宾
Owner SVOLT ENERGY TECHNOLOGY CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com