Title:
POLYANIONIC SODIUM ION BATTERY ANODE MATERIAL AND PREPARATION METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2020/019311
Kind Code:
A1
Abstract:
The present invention relates to a polyanionic sodium ion battery anode material and preparation method thereof. The polyanionic sodium ion battery anode material has the following chemical formula: Na 4+2βFe 3-β(PO 4)2P2O 7, wherein 0≤β≤1/4, the above has an orthogonal crystalline structure, and belongs to the Pn21a space group; the polyanionic sodium ion battery anode material has a carbon coating layer, said carbon coating layer having a thickness preferably of 3-5 nm. The battery anode material of the present invention has good thermal stability and the cost of the starting material is low; the invention is a new generation of sodium ion battery anode material which is very competitive; furthermore, the process flow of the present invention is simple, investment in equipment is small, and contiguity is high; costs are controllable and the invention is easy to implement on an enlarged industrial scale; the obtained product particles are uniform and of high purity, and the carbon layer is uniform.
Inventors:
CHOU SHULEI (CN)
CHEN MINGZHE (CN)
LI YONGCHENG (CN)
LI DONGXIANG (CN)
JI YONG (CN)
TENG GUOQING (CN)
DOU SHIXUE (CN)
CHEN MINGZHE (CN)
LI YONGCHENG (CN)
LI DONGXIANG (CN)
JI YONG (CN)
TENG GUOQING (CN)
DOU SHIXUE (CN)
Application Number:
PCT/CN2018/097471
Publication Date:
January 30, 2020
Filing Date:
July 27, 2018
Export Citation:
Assignee:
LIAONING STARRY SKY SODIUM BATTERY CO LTD (CN)
International Classes:
H01M4/36; H01M4/58; H01M10/054
Foreign References:
| CN107069012A | 2017-08-18 | |||
| CN108046231A | 2018-05-18 | |||
| CN106784727A | 2017-05-31 | |||
| KR20170056312A | 2017-05-23 |
Other References:
WU, XUEHANG ET AL.: "Sol-gel Synthesis of Na4Fe3(PO4)2(P2O7)/C Nanocomposite for Sodium Ion Batteries and New Insights into Microstructural Evolution during Sodium Extraction", JOURNAL OF POWER SOURCES, vol. 327, 3 August 2016 (2016-08-03), XP029694675, ISSN: 0378-7753, DOI: 20181016162812X
Attorney, Agent or Firm:
BEIJING SICHUANG DACHENG INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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