JP6823243B2 - 非水電解質二次電池用正極活物質粒子粉末及びその製造方法、並びに非水電解質二次電地 - Google Patents
非水電解質二次電池用正極活物質粒子粉末及びその製造方法、並びに非水電解質二次電地 Download PDFInfo
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Description
<Li1.08(Ni0.33Co0.33Mn0.33)O2粒子粉末>
硫酸ニッケルと硫酸コバルトと硫酸マンガンとをNi、Co、Mnのメタル元素換算で1:1:1の比になるように秤量し、湿式反応により共沈させ、水洗、乾燥することで(Ni0.33Co0.33Mn0.33)(OH)2粒子粉末(前駆体)を得た。
比較例1で得られたリチウム複合酸化物粒子粉末に、平均二次粒子径が0.4μmのWO3粉末をリチウム複合酸化物中のNi、Co及びMnの合計モル量に対し0.5mol%添加し乳鉢にて均一混合を行って正極活物質粒子粉末とした。得られた正極活物質粒子粉末を用いて作製したコイン型電池は、−10℃での直流抵抗は70.8Ωで比較例1に対する低温DCR改善率は14.5%、レート特性は85.4%であった。得られた正極活物質粒子粉末の混合条件を表1に、諸特性を表2に示す。
比較例1で得られたリチウム複合酸化物粒子粉末に、平均二次粒子径が0.4μmのWO3粉末をリチウム複合酸化物中のNi、Co及びMnの合計モル量に対し1.0mol%添加した。得られた正極活物質粒子粉末の混合条件を表1に、諸特性を表2に示す。
比較例1で得られたリチウム複合酸化物粒子粉末に、平均二次粒子径が0.4μmのWO3粉末をリチウム複合酸化物中のNi、Co及びMnの合計モル量に対し3.5mol%添加した。得られた正極活物質粒子粉末の混合条件を表1に、諸特性を表2に示す。
比較例1で得られたリチウム複合酸化物粒子粉末に、平均二次粒子径が2.2μmのWO3粉末をリチウム複合酸化物中のNi、Co及びMnの合計モル量に対し1mol%添加した。得られた正極活物質粒子粉末の混合条件を表1に、諸特性を表2に示す。
比較例1で得られたリチウム複合酸化物粒子粉末に、平均二次粒子径が0.6μmのZrO2粉末をリチウム複合酸化物中のNi、Co及びMnの合計モル量に対し1.0mol%添加した。得られた正極活物質粒子粉末の混合条件を表1に、諸特性を表2に示す。
比較例1で得られたリチウム複合酸化物粒子粉末に、平均二次粒子径が0.4μmのWO3粉末をリチウム複合酸化物中のNi、Co及びMnの合計モル量に対し6.0mol%添加した。得られた正極活物質粒子粉末の混合条件を表1に、諸特性を表2に示す。
比較例1で得られたリチウム複合酸化物粒子粉末に、平均二次粒子径が4.1μmのWO3粉末をリチウム複合酸化物中のNi、Co及びMnの合計モル量に対し1.0mol%添加した。得られた正極活物質粒子粉末の混合条件を表1に、諸特性を表2に示す。
比較例1で得られたリチウム複合酸化物粒子粉末に、平均二次粒子径が10.4μmのWO3粉末をリチウム複合酸化物中のNi、Co及びMnの合計モル量に対し1.0mol%添加した。得られた正極活物質粒子粉末の混合条件を表1に、諸特性を表2に示す。
<Li1.03(Ni0.5Co0.2Mn0.3)O2粒子粉末>
硫酸ニッケルと硫酸コバルトと硫酸マンガンとをNi、Co、Mnのメタル元素換算で5:2:3の比になるように秤量し、湿式反応により共沈させ、水洗、乾燥することで(Ni0.5Co0.2Mn0.3)(OH)2粒子粉末(前駆体)を得た。
比較例6で得られたリチウム複合酸化物粒子粉末に、平均二次粒子径が0.4μmのWO3粉末をリチウム複合酸化物中のNi、Co及びMnの合計モル量に対し1.0mol%添加し乳鉢にて均一混合を行って正極活物質粒子粉末とした。得られた正極活物質粒子粉末を用いて作製したコイン型電池は、−10℃での直流抵抗は133.5Ωで比較例6に対する低温DCR改善率は45.9%、レート特性は81.2%であった。得られた正極活物質粒子粉末の混合条件を表1に、諸特性を表2に示す。
Claims (4)
- 少なくともLiと化合しNi、Co及びMnから選ばれる1種以上の元素を含有する層状岩塩構造のリチウム複合酸化物粒子と、タングステン酸化物粒子とを含有する正極活物質粒子粉末であって、該リチウム複合酸化物中のNi、Co及びMnの合計モル量に対し、Wが0.1〜4.0mol%存在し、タングステン酸化物粒子の平均二次粒子径が0.1〜3.0μmであり、該タングステン酸化物粒子粉末の平均二次粒子径は該リチウム複合酸化物粒子粉末の平均二次粒子径の0.52倍以上0.75倍以下であることを特徴とする非水電解質二次電池用正極活物質粒子粉末。
- 前記正極活物質粒子粉末を正極に用い、対極にリチウム金属を使用した二次電池としたとき、−10℃の環境で該二次電池の充電率(SOC)が20%のときの直流抵抗の改善率が5%以上である請求項1に記載の非水電解質二次電池用正極活物質粒子粉末。
- 少なくともLiと化合しNi、Co及びMnから選ばれる1種以上の元素を含有する層状岩塩構造のリチウム複合酸化物粒子粉末と、タングステン酸化物粒子粉末とを混合する非水電解質二次電池用正極活物質粒子粉末の製造方法であって、該タングステン酸化物粒子粉末の平均二次粒子径が0.1〜3.0μmであり、該タングステン酸化物粒子粉末の平均二次粒子径が該リチウム複合酸化物粒子粉末の平均二次粒子径の0.52倍以上0.75倍以下であり、該リチウム複合酸化物中のNi、Co及びMnの合計モル量に対し、Wが0.1〜4.0mol%となるようにタングステン酸化物を添加する請求項1又は2に記載の非水電解質二次電池用正極活物質粒子粉末の製造方法。
- 請求項1又は2に記載の非水電解質二次電池用正極活物質粒子粉末を使用した非水電解質二次電池。
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| WO2019131194A1 (ja) * | 2017-12-27 | 2019-07-04 | パナソニック株式会社 | 非水電解質二次電池用正極活物質、非水電解質二次電池用正極及び非水電解質二次電池 |
| US11616227B2 (en) * | 2017-12-28 | 2023-03-28 | Panasonic Intellectual Property Management Co., Ltd. | Method for manufacturing positive electrode active material for non-aqueous electrolyte secondary battery |
| JP2020198297A (ja) * | 2019-05-30 | 2020-12-10 | パナソニックIpマネジメント株式会社 | 二次電池 |
| CN115053367B (zh) * | 2020-02-21 | 2024-07-30 | 宁德新能源科技有限公司 | 正极材料和包含所述正极材料的电化学装置 |
| JP7465121B2 (ja) * | 2020-03-10 | 2024-04-10 | 本田技研工業株式会社 | 多孔質誘電性粒子、リチウムイオン二次電池用電極、およびリチウムイオン二次電池 |
| US12159996B2 (en) | 2020-03-25 | 2024-12-03 | Samsung Sdi Co., Ltd. | Positive electrode active material, positive electrode including the same, and lithium secondary battery employing the positive electrode |
| CN112630110B (zh) * | 2020-12-14 | 2023-04-25 | 百尔罗赫塑料添加剂(江苏)有限公司 | 一种氧化锌粉末粒径测试方法及应用 |
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| JP4613943B2 (ja) | 2006-11-10 | 2011-01-19 | 三菱化学株式会社 | リチウム遷移金属系化合物粉体、その製造方法、及びその焼成前躯体となる噴霧乾燥体、並びにそれを用いたリチウム二次電池用正極及びリチウム二次電池 |
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| WO2012111116A1 (ja) * | 2011-02-16 | 2012-08-23 | トヨタ自動車株式会社 | リチウムイオン二次電池及びその製造方法 |
| JP2012238581A (ja) * | 2011-04-28 | 2012-12-06 | Nichia Chem Ind Ltd | 非水電解液二次電池用正極活物質 |
| JP6072688B2 (ja) * | 2011-07-28 | 2017-02-01 | 三洋電機株式会社 | 非水電解質二次電池及び非水電解質二次電池の製造方法 |
| JP2013084395A (ja) * | 2011-10-06 | 2013-05-09 | Toyota Motor Corp | リチウムイオン二次電池の製造方法 |
| KR20130081055A (ko) * | 2012-01-06 | 2013-07-16 | 삼성에스디아이 주식회사 | 리튬 전지용 양극 소재, 이로부터 얻어지는 양극 및 상기 양극을 채용한 리튬 전지 |
| US9786908B2 (en) * | 2012-03-30 | 2017-10-10 | Sanyo Electric Co., Ltd. | Positive electrode for non-aqueous electrolyte secondary battery and non-aqueous electrolyte secondary battery |
| KR20140044594A (ko) * | 2012-10-05 | 2014-04-15 | 삼성에스디아이 주식회사 | 리튬 이차 전지용 양극 활물질층 조성물 및 이를 이용한 리튬 이차 전지 |
| EP2973801A1 (en) * | 2013-03-15 | 2016-01-20 | Ovonic Battery Company, Inc. | Composite cathode materials having improved cycle life |
-
2015
- 2015-06-25 US US15/314,736 patent/US20170194626A1/en not_active Abandoned
- 2015-06-25 JP JP2016529648A patent/JP6693415B2/ja active Active
- 2015-06-25 CN CN201580024297.8A patent/CN106463720A/zh active Pending
- 2015-06-25 TW TW104120561A patent/TW201613159A/zh unknown
- 2015-06-25 KR KR1020167031110A patent/KR102394063B1/ko active Active
- 2015-06-25 WO PCT/JP2015/068298 patent/WO2015199168A1/ja not_active Ceased
- 2015-06-25 EP EP15811511.3A patent/EP3163657B1/en active Active
-
2020
- 2020-01-07 JP JP2020001102A patent/JP6823243B2/ja active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106463720A (zh) | 2017-02-22 |
| WO2015199168A1 (ja) | 2015-12-30 |
| US20170194626A1 (en) | 2017-07-06 |
| EP3163657B1 (en) | 2020-08-05 |
| CA2947003A1 (en) | 2015-12-30 |
| KR102394063B1 (ko) | 2022-05-06 |
| JP6693415B2 (ja) | 2020-05-13 |
| JPWO2015199168A1 (ja) | 2017-04-20 |
| TW201613159A (en) | 2016-04-01 |
| EP3163657A4 (en) | 2017-11-08 |
| KR20170026328A (ko) | 2017-03-08 |
| EP3163657A1 (en) | 2017-05-03 |
| JP2020092090A (ja) | 2020-06-11 |
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