Antimony based anode material for rechargeable batteries and preparation method

Patent metadata

Field	Value
Publication number	US-9923202-B2
Application number	US-201715428683-A
Country	US
Kind code	B2
Filing date	Feb 9, 2017
Priority date	Nov 28, 2013
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

Abstract

An antimony based anode material for a rechargeable battery includes nanoparticles of composition SbM x O y , where M is an element selected from the group consisting of Sn, Ni, Cu, In, Al, Ge, Pb, Bi, Fe, Co, and Ga, with 0≤x<2 and 0≤y≤2.5+2x. The nanoparticles form a substantially monodisperse ensemble with an average size not exceeding a value of 30 nm and by a size deviation not exceeding 15%. A method for preparing the antimony based anode material is carried out in situ in a non-aqueous solvent and starts by reacting an antimony salt and an organometallic amide reactant and oleylamine.

First claim

What is claimed is:

1. An antimony based anode material for a rechargeable battery, the anode material comprising nanoparticles of composition SbM x O y , where M is an element selected from the group consisting of Sn, Ni, Cu, In, Al, Ge, Pb, Bi, Fe, Co, and Ga, with 0<x<2 and 0≤y≤2.5+2x, wherein the nanoparticles are monodisperse nanocrystals of SbM x O y having an average size between 5 nm and 30 nm and a size deviation not exceeding 15%.

2. The material according to claim 1 , wherein the nanoparticles are coated with a capping species.

3. The material according to claim 1 , wherein the nanoparticles are composed of SbSn x .

4. The material according to claim 3 , wherein x is 1.5.

5. The material according to claim 1 , wherein the average size of the nanoparticles is between 10 nm and 25 nm.

6. The material according to claim 5 , wherein the average size of the nanoparticles is between 15 nm and 25 nm.

7. The material according to claim 1 , wherein the full width at half aximum (FWHM) of a size distribution of the average size is below 11%.

8. The material according to claim 1 , wherein the full width at half maximum (FWHM) of a size distribution of the average size is below 10%.

9. The material according to claim 1 , wherein the full width at half maxinmm (FV/FIM) of a size distribution of the average size is in a range of 7% to 11%.

10. The material according to claim 1 , wherein the full width at half maximum (FWHM) of a size distribution of the average size is in a range of 7% to 10%.

11. A rechargeable battery comprising an anode and a cathode, the anode comprising an antimony based anode material, which comprises nanoparticles of composition SbM x O y , where M is an element selected from the group consisting of Sn, Ni, Cu, In, Al, Ge, Pb, Bi, Fe. Co, and Ga, with 0<x<2 and 0≤y≤2.5+2x, wherein the nanoparticles are monodisperse nanocrystals of SbM x O y having an average size between 5 nm and 30 nm and a size deviation not exceeding 15%.

12. The rechargeable battery according to claim 11 , wherein said battery is a sodium battery or a lithium ion battery.

13. The material according to claim 1 , wherein the nanoparticles are substantially spherical.

14. The material according to claim 1 , wherein the nanoparticles have centrosymmetric polyhedral shapes.

Assignees

• Belenos Clean Power Holding Ag

Inventors

• Kovalenko Maksym V
• Meng He
• Kravchyk Kostiantyn
• Walter Marc

Classifications

• H01M4/0497

  Chemical precipitation · CPC title

• H01M4/1391

  of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title

• C01P2004/64

  Nanometer sized, i.e. from 1-100 nanometer · CPC title

• H01M4/366

  as layered products · CPC title

• C01G30/02

  Antimonates; Antimonites {(C01G30/001 takes precedence)} · CPC title