JP2023036570A - 大結晶粒凝集体三元正極材料、その製造方法およびリチウムイオン電池 - Google Patents
大結晶粒凝集体三元正極材料、その製造方法およびリチウムイオン電池 Download PDFInfo
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Abstract
Description
ニッケル塩、コバルト塩及びマンガン塩を混合溶液として調製するステップ、
沈殿剤及び配位剤を前記混合溶液に加え、前記混合溶液のpHを10.5~12に調整し、沈殿させて前駆体Aを得るステップ、
前記前駆体Aとリチウム塩とを、ボールミルで混合して、前駆体Bを得るステップ、
空気又は酸素の雰囲気において、前駆体Bを焼結し、この焼結は、5~15℃/minの速度で400~800℃まで昇温し、1~6h定温焼結してから、さらに1~10℃/minの速度で900~980℃まで昇温し、8~10h定温焼結するものである、ステップ、冷却して大結晶粒凝集体三元正極材料を得るステップ、を備える大結晶粒凝集体三元正極材料の製造方法を提供する。
前記配位剤は、エチレンジァミン四酢酸、アンモニア水、クエン酸アンモニウム、エチレンジァミン、酢酸アンモニゥムからなる群より選択される1種または複数種である。
<比較例1>
<比較例2>
Claims (8)
- ニッケル塩、コバルト塩及びマンガン塩を混合溶液として調製するステップ、
沈殿剤及び配位剤を前記混合溶液に加え、前記混合溶液のpHを10.5~12に調整し、沈殿させて前駆体Aを得るステップ、
前記前駆体Aとリチウム塩とを、ボールミルで混合して、前駆体Bを得るステップ、
空気又は酸素の雰囲気において、前駆体Bを焼結し、この焼結は、5~15℃/minの速度で400~800℃まで昇温し、1~6h定温焼結してから、さらに1~10℃/minの速度で900~980℃まで昇温し、8~10h定温焼結するものである、ステップ、
冷却して大結晶粒凝集体三元正極材料を得るステップ、
を備える大結晶粒凝集体三元正極材料の製造方法。 - 前記リチウム塩中のリチウムのモル数をM、前記ニッケル塩中のニッケルのモル数、前記コバルト塩中のコバルトのモル数、及びマンガン塩中のマンガンのモル数の和をNとすれば、M:Nが1.05~1.2となっていることを特徴とする請求項1に記載の大結晶粒凝集体三元正極材料の製造方法。
- 前記前駆体Aは、平均粒子径D50≦9μmであることを特徴とする請求項1に記載の大結晶粒凝集体三元正極材料の製造方法。
- 前記沈殿剤は、水酸化ナトリウム、水酸化カリウム、炭酸ナトリウム、炭酸カリウム、炭酸水素アンモニウム、および水酸化リチウムからなる群から選択される1種または複数種であり、
前記配位剤は、エチレンジァミン四酢酸、アンモニア水、クエン酸アンモニウム、エチレンジァミン、酢酸アンモニゥムからなる群より選択される1種または複数種であることを特徴とする請求項1に記載の大結晶粒凝集体三元正極材料の製造方法。 - 前記リチウム塩は、炭酸リチウム、水酸化リチウム、酢酸リチウムから選択される1種または複数種であり、
前記ニッケル塩は、硫酸ニッケル、塩化ニッケル、酢酸ニッケル、硝酸ニッケルから選択される1種または複数種であり、
前記コバルト塩は、硫酸コバルト、塩化コバルト、酢酸コバルト、硝酸コバルトから選択される1種以上であり、
前記マンガン塩は、硫酸マンガン、塩化マンガン、酢酸マンガン、硝酸マンガンから選択される1種または複数種であることを特徴とする請求項1に記載の大結晶粒凝集体三元正極材料の製造方法。 - 前記混合溶液は、撹拌中に前記沈殿剤及び前記配位剤を加え、前記撹拌の回転速度が100~800rpmであることを特徴とする請求項1に記載の大結晶粒凝集体三元正極材料の製造方法。
- 請求項1~6のいずれかに記載の製造方法によって得られた大結晶粒凝集体三元正極材料であって、前記大結晶粒凝集体三元正極材料は、化学式がLiNixCoyMnzO2(式中、x+y+z≦1、0.2≦x≦0.8、0.1≦y≦0.3)であり、平均粒子径D50が1μm≦D50≦2.5μmであるニッケルコバルトマンガンリチウム化合物を備えることを特徴とする大結晶粒凝集体三元正極材料。
- 結着剤および導電剤を含む正極シートを備えるリチウムイオン電池であって、前記正極シートは、請求項7に記載の大結晶粒凝集体三元正極材料をさらに備えることを特徴とするリチウムイオン電池。
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| CN115275186B (zh) * | 2022-08-16 | 2025-02-25 | 宁波容百新能源科技股份有限公司 | 普鲁士蓝类化合物的正极浆料及其制备方法、正极极片 |
| CN115215388A (zh) * | 2022-08-19 | 2022-10-21 | 宁波容百新能源科技股份有限公司 | 一种三元正极材料的制备方法及三元正极材料 |
| WO2025024957A1 (zh) * | 2023-07-28 | 2025-02-06 | 青美邦新能源材料有限公司 | 一种正极前驱体及其制备方法、正极材料和电池 |
| WO2025043376A1 (zh) * | 2023-08-25 | 2025-03-06 | 广东邦普循环科技有限公司 | 一种锂钴氧化物及其制备方法和应用 |
| CN117613214A (zh) * | 2023-10-31 | 2024-02-27 | 华友新能源科技(衢州)有限公司 | 镍钴锰三元前驱体及其制备方法和应用 |
| CN119133429B (zh) * | 2024-11-07 | 2025-02-07 | 北京当升材料科技股份有限公司 | 正极材料及其制备方法、锂离子电池和用电装置 |
| CN120328634A (zh) * | 2025-06-20 | 2025-07-18 | 湖南汇帮环保科技有限公司 | 一种钴蓝颜料的制备方法 |
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| WO2018021453A1 (ja) * | 2016-07-28 | 2018-02-01 | 住友化学株式会社 | リチウムニッケル複合酸化物の製造方法 |
| JP2020501329A (ja) * | 2016-12-12 | 2020-01-16 | ポスコPosco | リチウム二次電池用正極活物質、その製造方法、およびそれを含むリチウム二次電池 |
| CN110867575A (zh) * | 2018-08-28 | 2020-03-06 | 比亚迪股份有限公司 | 三元正极材料及其制备方法、锂离子电池和电动汽车 |
| CN110863245A (zh) * | 2018-08-28 | 2020-03-06 | 比亚迪股份有限公司 | 三元正极材料及其制备方法、锂离子电池和电动汽车 |
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| JP7464666B2 (ja) | 2024-04-09 |
| EP4089055A3 (en) | 2023-03-08 |
| US11996558B2 (en) | 2024-05-28 |
| CN113716625B (zh) | 2023-11-21 |
| CN113716625A (zh) | 2021-11-30 |
| US20240274816A1 (en) | 2024-08-15 |
| KR20220136293A (ko) | 2022-10-07 |
| KR102787334B1 (ko) | 2025-03-31 |
| US20230080488A1 (en) | 2023-03-16 |
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