	US 11,939,230 B1
	Metal sulfide negative material of sodium ion battery and preparation method thereof
Aixia Li, Guangdong (CN); Haijun Yu, Guangdong (CN); Yinghao Xie, Guangdong (CN); Xuemei Zhang, Guangdong (CN); and Changdong Li, Guangdong (CN)
Assigned to GUANGDONG BRUNP RECYCLING TECHNOLOGY CO., LTD., Guangdong (CN); HUNAN BRUNP RECYCLING TECHNOLOGY CO., LTD., Hunan (CN); and HUNAN BRUNP EV RECYCLING CO., LTD., Changsha (CN)
Appl. No. 18/265,872
Filed by GUANGDONG BRUNP RECYCLING TECHNOLOGY CO., LTD., Guangdong (CN); HUNAN BRUNP RECYCLING TECHNOLOGY CO., LTD., Hunan (CN); and HUNAN BRUNP EV RECYCLING CO., LTD., Hunan (CN)
PCT Filed Aug. 11, 2022, PCT No. PCT/CN2022/111807 § 371(c)(1), (2) Date Jun. 7, 2023, PCT Pub. No. WO2023/071394, PCT Pub. Date May 4, 2023.
Claims priority of application No. 202111259839.3 (CN), filed on Oct. 28, 2021.
Int. Cl. H01M 4/58 (2010.01); C01G 3/12 (2006.01); C01G 9/08 (2006.01); H01M 10/054 (2010.01); H01M 4/02 (2006.01)

CPC C01G 3/12 (2013.01) [C01G 9/08 (2013.01); H01M 4/5815 (2013.01); H01M 10/054 (2013.01); C01P 2004/03 (2013.01); C01P 2004/62 (2013.01); C01P 2004/64 (2013.01); C01P 2004/82 (2013.01); C01P 2006/40 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)]

9 Claims

1. A preparation method of a metal sulfide negative material of a sodium ion battery, comprising the following steps of:

S1: preparing a mixed solution of stannous chloride and metal salt, wherein the metal salt is at least one of zinc salt or copper salt;

S2: adding polyvinylpyrrolidone into the mixed solution to obtain a solution A;

S3: introducing reaction gas into the solution A, wherein the reaction gas is a mixed gas of hydrogen sulfide and nitrogen, aging after the reaction, and performing solid-liquid separation to obtain a precipitate; and

S4: soaking the precipitate into a persulfide solution, and performing solid-liquid separation, then washing and drying an obtained solid, thus obtaining the metal sulfide negative material of the sodium ion battery; wherein the persulfide solution is a solution of one or two of sodium persulfate and ammonium persulfate;

wherein the metal sulfide negative material of the sodium ion battery has porous nanoparticles with a particle size of 5 nm to 500 nm, and the metal sulfide negative material of the sodium ion battery is at least one of zinc sulfide or copper sulfide.