US 11,990,620 B2
Vanadium sodium phosphate positive electrode material, sodium ion battery, preparation method therefor, and use thereof
Zifeng Ma, Shanghai (CN); Haiying Che, Shanghai (CN); Xiaowei Yang, Shanghai (CN); and Guijia Cui, Shanghai (CN)
Assigned to SHANGHAI ZIJIAN CHEMICAL TECHNOLOGY CO., LTD, Shanghai (CN)
Appl. No. 17/265,811
Filed by SHANGHAI ZIJIAN CHEMICAL TECHNOLOGY CO., LTD, Shanghai (CN)
PCT Filed Aug. 7, 2019, PCT No. PCT/CN2019/099660
§ 371(c)(1), (2) Date Feb. 4, 2021,
PCT Pub. No. WO2020/030014, PCT Pub. Date Feb. 13, 2020.
Claims priority of application No. 201810889365.2 (CN), filed on Aug. 7, 2018; and application No. 201910203315.9 (CN), filed on Mar. 18, 2019.
Prior Publication US 2021/0167387 A1, Jun. 3, 2021
Int. Cl. H01M 4/58 (2010.01); C01B 25/45 (2006.01); H01M 4/36 (2006.01); H01M 4/38 (2006.01); H01M 4/587 (2010.01); H01M 10/04 (2006.01); H01M 10/054 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/5825 (2013.01) [C01B 25/45 (2013.01); H01M 4/366 (2013.01); H01M 4/381 (2013.01); H01M 4/587 (2013.01); H01M 10/0436 (2013.01); H01M 10/054 (2013.01); C01P 2002/52 (2013.01); C01P 2002/72 (2013.01); C01P 2004/03 (2013.01); C01P 2004/04 (2013.01); C01P 2004/24 (2013.01); C01P 2004/80 (2013.01); C01P 2006/40 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for preparing a vanadium sodium phosphate positive electrode material, which comprises the following steps:
(1) performing a reaction in which an aqueous solution containing a vanadium source reacts with a phosphorus source, a reducing agent, a sodium source, and a carbon source; wherein the reaction comprises: the aqueous solution containing the vanadium source reacting first with the phosphorus source, and then with the reducing agent; or, the aqueous solution containing the vanadium source reacting first with the reducing agent and then with the phosphorus source;
(2) obtaining a reaction solution from step (1), drying and calcining the reaction solution.