JP7336749B2 - ニッケル粒子の製造方法、硫酸ニッケルの製造方法、及び二次電池用正極活物質の製造方法 - Google Patents
ニッケル粒子の製造方法、硫酸ニッケルの製造方法、及び二次電池用正極活物質の製造方法 Download PDFInfo
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- B22F9/00—Making metallic powder or suspensions thereof
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- H01M4/0471—Processes of manufacture in general involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis
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- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
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- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/0824—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with a specific atomising fluid
- B22F2009/0828—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with a specific atomising fluid with water
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B22F2301/00—Metallic composition of the powder or its coating
- B22F2301/15—Nickel or cobalt
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- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
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- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/0433—Nickel- or cobalt-based alloys
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- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/028—Positive electrodes
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- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Battery Electrode And Active Subsutance (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
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Description
101.6mm角のニッケルカソードを高周波誘導炉に投入して、1600℃の温度で溶解させた。溶融ニッケルを誘導炉から流出(落下)させ、当該溶融ニッケルに高圧水を吹き付ける水アトマイズ法により粉末化し、D50が100μmのニッケル粒子を得た。ニッケル粒子の表面を走査型電子顕微鏡(SEM)で観察し、エネルギー分散型X線分析(EDS)により組成解析した結果、粒子表面の酸素濃度は6質量%であった。
ニッケルカソードに対して0.1質量%のSiを誘導炉に投入し、溶融ニッケルの表面に浮き上がった酸化物をスラグとして除去したこと以外は、実施例1と同様の方法で、D50が100μmのニッケル粒子を得た。この場合、粒子表面の酸素濃度は3質量%であった。
水アトマイズ法において、水の代わりに、硫酸水溶液(0.3mol/L)を用いたこと以外は、実施例1と同様の方法で処理を行った。この場合、ニッケル粒子の全量が溶解した硫酸水溶液(硫酸ニッケルの水溶液)が得られた。
水アトマイズ法において、水の代わりに、0.1質量%のノニオン界面活性剤水溶液を用いたこと以外は、実施例1と同様の方法で、D50が100μmのニッケル粒子を得た。この場合、粒子表面の酸素濃度は1.5質量%であった。
11 溶湯
12 ニッケル粒子
13 金属
20 溶融炉
20a 出湯口
21 ノズル
Claims (6)
- ニッケル源を溶融させて溶湯を得る工程と、
前記溶湯にガス又は水系媒体を吹き付けるアトマイズ法により、前記溶湯に含まれる溶融ニッケルを粉末化して純度が90%以上のニッケル粒子を得る工程と、
を備え、
前記ニッケル源は、ニッケルカソードである、ニッケル粒子の製造方法。 - 前記ニッケル源と共に、ニッケルよりも酸化され易い金属を溶融させ、生成した前記金属の酸化物を除去する、請求項1に記載のニッケル粒子の製造方法。
- 前記アトマイズ法は、前記水系媒体を用いる水アトマイズ法であり、
前記水系媒体は、界面活性剤を含む水、又は硫酸水溶液である、請求項1又は2に記載のニッケル粒子の製造方法。 - 前記ニッケル粒子に含まれる金属成分のうち、ニッケルの含有率が98質量%以上である、請求項1~3のいずれか1項に記載のニッケル粒子の製造方法。
- 請求項1~4のいずれか1項に記載の製造方法により製造されるニッケル粒子を硫酸水溶液に溶解して硫酸ニッケルを得る、硫酸ニッケルの製造方法。
- 請求項5に記載の製造方法により製造される硫酸ニッケルを用いた晶析法により、ニッケルを含有する水酸化物を得る工程と、
前記水酸化物とリチウム化合物を混合し、混合した粒子を焼成する工程と、
を備える、二次電池用正極活物質の製造方法。
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PCT/JP2019/029396 WO2020066262A1 (ja) | 2018-09-26 | 2019-07-26 | ニッケル粒子の製造方法、硫酸ニッケルの製造方法、及び二次電池用正極活物質の製造方法 |
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CN112584949A (zh) | 2021-03-30 |
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