JP2016509348A - リチウム二次電池用正極複合素材製造方法及びこれを用いた電極製造方法及び前記電極の充放電方法 - Google Patents
リチウム二次電池用正極複合素材製造方法及びこれを用いた電極製造方法及び前記電極の充放電方法 Download PDFInfo
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Abstract
Description
特に、電気自動車は1回充電走行距離が極めて重要であり、これは二次電池正極素材のエネルギー密度に関するため、正極素材の高性能化に対する研究開発が必須である。従来のLMO又はNMC、そして、オリビン系正極素材のエネルギー密度は、約120〜150mAh/gのレベルに電気自動車の走行距離を画期的に向上させるためには不足であると言える。
一実施形態によると、前記正極複合素材Li(LixNiyCozMnwO2+α)のXRD(X−Ray Diffraction、X線回折)の分析結果、2つの超格子ピークを示す。ここで、前記2つの超格子ピークが検出される前記2次焼成温度は800℃以上である。
Claims (20)
- 硝酸ニッケル溶液、硝酸マンガン溶液、及び硝酸コバルト溶液を混合した出発物質溶液に着火剤を混合し、前記出発物質溶液と前記着火剤の混合溶液のpHを調整するためにNaOH水溶液を添加し、共沈法を用いてLi2MnO3系の正極複合素材Li(LixNiyCozMnwO2+α)の前駆体を製造するステップと、
前記前駆体にLiOH・H2Oを投入して混合するステップと、
前記混合した粉末を1次焼成するステップと、
前記1次焼成した粉末に対して2次焼成するステップと、
を含む、リチウム二次電池用正極複合素材製造方法。 - 前記正極複合素材Li(LixNiyCozMnwO2+α)はx=0.2〜0.5、y=0.1〜0.2、z=0.1〜0.2、w=0.5〜0.7である、請求項1に記載のリチウム二次電池用正極複合素材製造方法。
- 前記正極複合素材Li(LixNiyCozMnwO2+α)は、Li1.5(Ni0.17Mn0.66Co0.17)O2である、請求項2に記載のリチウム二次電池用正極複合素材製造方法。
- 前記1次焼成温度は500℃である、請求項1に記載のリチウム二次電池用正極複合素材製造方法。
- 前記2次焼成温度は650℃〜1000℃である、請求項1に記載のリチウム二次電池用正極複合素材製造方法。
- 前記正極複合素材Li(LixNiyCozMnwO2+α)のXRD(X−Ray Diffraction、X線回折)の分析結果、2つの超格子ピークを示す、請求項1に記載のリチウム二次電池用正極複合素材製造方法。
- 前記2つの超格子ピークが検出される前記2次焼成温度は800℃以上である、請求項5に記載のリチウム二次電池用正極複合素材製造方法。
- 前記出発物質溶液は、Ni(NO3)2・H2O、Mn(NO3)2・H2O及びCo(NO3)2・H2Oをそれぞれ1:4:1モル比で混合した溶液である、請求項1に記載のリチウム二次電池用正極複合素材製造方法。
- 前記着火剤はアンモニア水を使用し、前記出発物質溶液に前記着火剤を0.8モル混合する、請求項8に記載のリチウム二次電池用正極複合素材製造方法。
- 前記NaOH水溶液は、NaOH粉末を溶液に溶解した1モルの溶液である、請求項8に記載のリチウム二次電池用正極複合素材製造方法。
- 前記LiOH・H2Oは前記前駆体対比103wt%を添加する、請求項1に記載のリチウム二次電池用正極複合素材製造方法。
- 共沈法を用いてLi2MnO3系の正極複合素材Li(LixNiyCozMnwO2+α)粉末を製造するステップと、
前記正極複合素材Li(LixNiyCozMnwO2+α)粉末に導電剤とバインダーを混合してスラリーを製造するステップと、
前記スラリーを塗布するステップと、
前記塗布されたスラリーを乾燥するステップと、
前記乾燥されたスラリーを圧搾するステップと、
前記圧搾されたスラリーをパンチングして正極を製造するステップと、
前記正極を用いて電極セルを製造するステップと、
を含み、
前記Li2MnO3系の正極複合素材Li(LixNiyCozMnwO2+α)粉末の製造ステップは、
硝酸ニッケル溶液、硝酸マンガン溶液、及び硝酸コバルト溶液を混合した出発物質溶液に着火剤を混合し、前記出発物質溶液と前記着火剤の混合溶液のpHを調整するためにNaOH水溶液を添加し、共沈法を用いてLi2MnO3系の正極複合素材Li(LixNiyCozMnwO2+α)の前駆体を製造するステップと、
前記前駆体にLiOH・H2Oを投入して混合するステップと、
前記混合した粉末を1次焼成するステップと、
前記1次焼成した粉末に対して2次焼成するステップと、
を含む、リチウム二次電池の電極製造方法。 - 前記電極セルを製造するステップは、コインセル形態又は3極セルの形態に形成される、請求項12に記載のリチウム二次電池の電極製造方法。
- 前記コインセルは前記製造された正極を使用し、負極にリチウムメタルを使用し、隔離膜にPE Separatorを使用し、電解液にエチレンカーボネイト(EC)とジエチルカーボネイト(DMC)の混合溶媒(体積比1:1)に1モルLiPF6が溶解した溶液を使用する、請求項13に記載のリチウム二次電池の電極製造方法。
- 前記3極セルは、前記製造された正極を使用し、対極にリチウムメタルを使用し、参照電極にリチウムメタルを使用し、隔離膜にPE Separatorを使用し、電解液にエチレンカーボネイト(EC)とジエチルカーボネイト(DMC)の混合溶媒(体積比1:1)に1モルLiPF6が溶解した溶液を使用する、請求項13に記載のリチウム二次電池の電極製造方法。
- 前記スラリーは、前記複合素材Li(LixNiyCozMnwO2+α)粉末、導電剤、バインダーの組成比を80:10:10の重量比(wt%)に混合する、請求項12に記載のリチウム二次電池の電極製造方法。
- 前記スラリーを塗布するステップは、前記スラリーをアルミホイルに100〜110umの厚さに塗布する、請求項12に記載のリチウム二次電池の電極製造方法。
- 前記スラリーを塗布するステップは、前記スラリーをアルミホイルに圧搾するステップで60〜70um厚さに塗布する、請求項17に記載のリチウム二次電池の電極製造方法。
- 硝酸ニッケル溶液、硝酸マンガン溶液、及び硝酸コバルト溶液を混合した出発物質溶液に着火剤を混合し、前記出発物質溶液と前記着火剤の混合溶液のpHを調整するためにNaOH水溶液を添加し、共沈法を用いてLi2MnO3系の正極複合素材Li(LixNiyCozMnwO2+α)を用いて製造した電極セルを2.0〜4.6Vの範囲内で定電流及び定電圧に充電と放電を繰り返し行う、リチウム二次電池の充放電方法。
- 前記電極セルで正極素材のリチウムの酸化及び還元の挙動を把握するため、3極セルを用いて電位走査法で充放電電圧範囲2.0〜4.9V、走査速度(0.05mv/s)に酸化及び還元挙動を行う、請求項19に記載のリチウム二次電池の充放電方法。
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| KR10-2013-0015090 | 2013-02-13 | ||
| PCT/KR2013/007462 WO2014126312A1 (ko) | 2013-02-13 | 2013-08-20 | 리튬이차전지용 양극복합소재 제조방법 및 이를 이용한 전극 제조방법 및 상기 전극의 충방전 방법 |
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| CN104409716A (zh) * | 2014-10-30 | 2015-03-11 | 中国科学院过程工程研究所 | 一种具有浓度梯度的镍锂离子电池正极材料及其制备方法 |
| US10483541B2 (en) * | 2016-05-09 | 2019-11-19 | Nichia Corporation | Method of producing nickel-cobalt composite hydroxide and method of producing positive electrode active material for non-aqueous electrolyte secondary battery |
| US11401167B2 (en) * | 2017-03-15 | 2022-08-02 | Umicore | Nitrate process for manufacturing transition metal hydroxide precursors |
| US12288866B2 (en) | 2017-11-24 | 2025-04-29 | Lg Chem, Ltd. | Method for preparing positive electrode active material |
| KR102288291B1 (ko) * | 2018-04-12 | 2021-08-10 | 주식회사 엘지화학 | 양극 활물질의 제조방법 |
| JP7162274B2 (ja) * | 2018-05-31 | 2022-10-28 | パナソニックIpマネジメント株式会社 | 正極活物質およびそれを備えた電池 |
| KR102880140B1 (ko) * | 2020-08-14 | 2025-11-04 | 주식회사 엘지에너지솔루션 | 전극 슬러리 조성물, 이의 제조방법 및 이의 용도 |
| JP2024536359A (ja) * | 2021-10-04 | 2024-10-04 | ビーエーエスエフ ソシエタス・ヨーロピア | コーティングされたカソード活物質の製造方法、及びコーティングされたカソード活物質 |
| CN114933337B (zh) * | 2022-06-30 | 2023-12-26 | 宁波容百新能源科技股份有限公司 | 一种锰基碳酸盐前驱体、富锂锰基正极材料及锂离子二次电池 |
| KR102467486B1 (ko) * | 2022-06-30 | 2022-11-17 | 주식회사 탑머티리얼 | 리튬 이차 전지용 양극 활물질, 이의 제조 방법, 이를 포함하는 양극 및 리튬 이차 전지 |
| KR20250019659A (ko) * | 2023-07-31 | 2025-02-10 | 베이징 이스프링 머티리얼 테크놀로지 컴퍼니 리미티드 | 리튬 과잉 망간계 산화물 양극재 및 그 제조방법과 응용, 양극시트 및 그 응용 |
| CN119812667B (zh) * | 2025-03-11 | 2025-10-17 | 江苏中兴派能电池有限公司 | 隔膜改性材料及其制备方法、隔膜和钠电池 |
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| JP2013500554A (ja) * | 2009-07-24 | 2013-01-07 | エンビア・システムズ・インコーポレイテッド | 長期サイクル性能を備えるリチウムイオン電池 |
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| US11258063B2 (en) | 2017-07-13 | 2022-02-22 | Lg Chem, Ltd. | Method for preparing positive electrode active material |
Also Published As
| Publication number | Publication date |
|---|---|
| US10020488B2 (en) | 2018-07-10 |
| WO2014126312A1 (ko) | 2014-08-21 |
| KR101501823B1 (ko) | 2015-03-12 |
| US20150380720A1 (en) | 2015-12-31 |
| KR20140101915A (ko) | 2014-08-21 |
| JP6257650B2 (ja) | 2018-01-10 |
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