A lithium silica permanganate -lithium siliconate/carbon composite material and preparation method of alkaline soil metal ions

A carbon composite material, silicomanganic acid-based technology, applied in the direction of nanotechnology, nanotechnology, structural parts, etc. for materials and surface science, can solve the problem of low electronic conductivity and ion diffusivity, can not meet the growing demand, Restricting the promotion and application and other issues, to achieve the effect of improving rate performance, improving electrochemical performance, and shortening diffusion distance
CN107546386BActive Publication Date: 2020-04-07CENT SOUTH UNIV
2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CENT SOUTH UNIV
Publication Date
2020-04-07

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a lithium manganese silicate / carbon composite material doped with alkaline-earth metal ions and a preparing method thereof. The chemical formula of the material is Li2Mn(1-x)MxSiO4 / C, wherein 0<x<=0.10, and M is selected from one of Mg, Ca, Sr or Ba. The material displays [001] spots with axes under a high-resolution transmission electron microscopy, and is prepared based on the principle of a hydrothermal method. The lithium manganese silicate / carbon composite material is uniform in shape and high in degree of crystallinity, [001] crystal faces are exposed, and due todoping of alkaline-earth metal elements, the lattice constants of the material are changed; meanwhile, all the elements show the features that concentrations are distributed in a gradient mode, thus promoting of electrical conductivity is facilitated, and the material has excellent electrochemical performance under high magnification.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a lithium battery cathode active material and a preparation method, in particular to an ion-doped lithium silicomanganate-based lithium / carbon composite material and a preparation method. Background technique

[0002] Due to the positive electrode materials currently used in lithium-ion batteries (such as layered transition metal oxides (LiMO 2 ), spinel lithium manganate (LiMn 2 o 4 ) and olivine-type lithium iron phosphate (LiFePO 4 )) have different defects: poor safety performance, low energy density or poor conductivity, etc., which can no longer meet people's increasing demand for energy equipment under the current energy crisis and greenhouse effect. This forces researchers to actively develop and research a new generation of cathode materials for lithium-ion batteries with high energy density, good safety, environmental friendliness and low cost.

[0003] Lithium manganese silicate (Li 2 MnSiO 4 ) material is a ne...

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