Title:
SODIUM ION CONDUCTOR WITH HIGH ROOM-TEMPERATURE IONIC CONDUCTIVITY AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2021/046906
Kind Code:
A1
Abstract:
Disclosed in the present invention are a sodium ion conductor with high room-temperature ionic conductivity and a preparation method therefor. The present method employs solid state sintering technology and can prepare crystalline and amorphous transition metal silicate by means of adjusting the ratio of the sodium source added. The chemical formula of the prepared transition metal silicate is Na2-2xMSiO4-x, M being the transition metals Fe, Cr, Mn, Co, V, or Ni; when 0＜x ≤ 0.5, the prepared transition metal silicate is crystalline, and the degree of crystallisation decreases as x increases; and when 0.5＜x＜1, the prepared transition metal silicate is amorphous. The transition metal silicate material prepared by the present invention can be used as a solid state electrolyte for sodium ion batteries and, whether crystalline or amorphous, has the advantages of high room-temperature ionic conductivity, stability to air, and stability to metallic sodium; in addition, the transition metal silicate stores an abundant Na-Si-O element system, suitable for the large-scale development and application of low-cost, high-performance, and safe sodium ion batteries.
Inventors:
JIANG YINZHU (CN)
GUAN WENHAO (CN)
GUAN WENHAO (CN)
Application Number:
PCT/CN2019/107489
Publication Date:
March 18, 2021
Filing Date:
September 24, 2019
Export Citation:
Assignee:
UNIV ZHEJIANG (CN)
International Classes:
C04B35/16; C04B35/622; H01M10/054; H01M10/0562
Domestic Patent References:
| WO2012060085A1 | 2012-05-10 | |||
| WO2015177567A1 | 2015-11-26 |
Foreign References:
| CN105977486A | 2016-09-28 | |||
| CN109461932A | 2019-03-12 | |||
| US20120326078A1 | 2012-12-27 | |||
| CN107709237A | 2018-02-16 | |||
| CN105990563A | 2016-10-05 |
Other References:
ZHANG, DENGKE: "Research Progress of Sodium Ion Battery Electrolytes", JOURNAL OF TECHNOLOGY, vol. 18, no. 4, 1 December 2018 (2018-12-01), pages 1 - 8, XP055791084, ISSN: 2096-3424
Attorney, Agent or Firm:
HANGZHOU QIUSHI PATENT OFFICE CO.,LTD. (CN)
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