Check patentability & draft patents in minutes with Patsnap Eureka AI!

Preparation method of alpha-MnO2@SnO2 nano heterojunction composite material

A composite material and heterojunction technology, which is applied in the field of preparation of α-MnO2@SnO2 nanoheterojunction composite materials to achieve the effects of promoting diffusion, buffering material volume changes, and alleviating volume expansion

Pending Publication Date: 2022-02-01
HEFEI GUOXUAN HIGH TECH POWER ENERGY
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, how to design and prepare hierarchical α-MnO with large specific surface area and special morphology 2 @SnO 2 Heterostructures still have challenges

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 alpha-MnO2@SnO2 nano heterojunction composite material
  • Preparation method of alpha-MnO2@SnO2 nano heterojunction composite material
  • Preparation method of alpha-MnO2@SnO2 nano heterojunction composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0033] an α-MnO 2 @SnO 2 The preparation method of the nano-heterojunction composite material specifically includes the following steps:

[0034] (1), α-MnO 2Preparation of nanotubes: take KMnO with a mass ratio of 0.45:1 4 Add concentrated hydrochloric acid into deionized water, the concentration of concentrated hydrochloric acid is 12mol / L, keep stirring at room temperature for 20min to form a solution, then place the solution in a polytetrafluoroethylene high-pressure reactor, and stand for reaction at 140°C for 12h, the reaction After the end, the reaction product was cooled to room temperature, and then the reaction product was washed with deionized water several times, then dried in a drying oven at 60°C for 12 hours, and finally α-MnO was obtained by grinding. 2 nanotube;

[0035] (2), the prepared α-MnO 2 Nanotube, SnCl 4 ·5H 2 O and concentrated hydrochloric acid are added into deionized water according to the mass ratio of 11:6:59, wherein the concentration of...

experiment example 1

[0040] The α-MnO that embodiment makes 2 Nanotubes and α-MnO 2 @SnO 2 The nano-heterojunction composite material was tested by XRD, and the results can be found in figure 1 . α-MnO 2 All the diffraction peaks of the nanotubes are located in the tetragonal MnO 2 The standard card (JCPDSno.41-0141) corresponds one by one. while α-MnO 2 @SnO 2 Nano-heterojunction composites, new diffraction peaks appear at 2Theta of 26.6°, 33.9°, 51.8° and 61.9°, respectively, and they are similar to the tetragonal rutile SnO 2 The (110), (101), (211) and (310) crystal planes of the standard card (JCPDS no.41-1445) corresponded one-to-one, and no impurity peaks were found, indicating that the prepared α-MnO 2 Nanotubes and α-MnO 2 @SnO 2 The purity of the nano-heterojunction composites is high.

experiment example 2

[0042] The α-MnO that embodiment makes 2 Nanotubes and α-MnO 2 @SnO 2 Nano-heterojunction composite materials were tested for specific surface area and pore structure, and the results can be found in figure 2 and image 3 . The N2 adsorption and desorption isotherms all show obvious hysteresis loops, indicating that the material is in the mesoporous range. α-MnO 2 @SnO 2 The specific surface area and total void volume of nano-heterojunction composites are 148.44m2g-1 and 0.14cm3 g-1, respectively, and the specific surface area (8.28m2 g-1) and total void volume (0.07cm3 g -1) Both are large. α-MnO 2 @SnO 2 The nano-heterojunction composite material has a large specific surface area that can provide more sites for storing lithium, and the microscopic results can promote the rapid diffusion of electrolyte molecules and lithium ions, and can properly alleviate the volume change during charge and discharge. , which can significantly improve the electrochemical performan...

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
Concentrationaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of an alpha-MnO2@SnO2 nano heterojunction composite material, which comprises the following steps: preparing alpha-MnO2 nanotubes from KMnO4 and concentrated hydrochloric acid by a hydrothermal method, proportioning the alpha-MnO2 nanotubes and SnCl4. 5H2O, and preparing the alpha-MnO2@SnO2 nano heterojunction composite material by a hydrothermal method. The preparation method is simple and easy to operate; and the prepared alpha-MnO2@SnO2 nano heterojunction composite material has good lithium ion battery cycle performance.

Description

technical field [0001] The invention relates to the technical field of negative electrode materials for lithium ion batteries, specifically a kind of α-MnO 2 @SnO 2 Preparation method of nano-heterojunction composite material. Background technique [0002] The development of lithium-ion batteries has attracted extensive attention from researchers because they play an important role in our daily life in popular electronic products and primary power sources such as pure electric vehicles and stationary energy storage systems. In recent years, a large amount of research work has focused on exploring new Li-ion anode materials with higher storage capacity. Compared with the capacity of only 372mAh g -1 Commercial graphite, transition metal oxides with excellent theoretical capacity such as: SnO 2 , Fe 2 o 3 、Co 3 o 4 and Mn x o y , is considered to be an anode material that can replace graphite. [0003] Among these metal oxides, α-MnO 2 Has a high theoretical specif...

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
IPC IPC(8): H01M4/50H01M4/48H01M10/0525
CPCH01M4/502H01M4/483H01M10/0525Y02E60/10
Inventor 吴慧鹏
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com