JP2014237579A - リチウムマンガン複合酸化物、及び二次電池、及びそれらの作製方法 - Google Patents
リチウムマンガン複合酸化物、及び二次電池、及びそれらの作製方法 Download PDFInfo
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- C01G45/1257—Manganates or manganites with a manganese oxidation state of Mn(III), Mn(IV) or mixtures thereof of the type[MnO3]n-, e.g. Li2MnO3, Li2[MxMn1-xO3], (La,Sr)MnO3 containing lithium, e.g. Li2MnO3, Li2[MxMn1-xO3
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Abstract
【解決手段】LiMn2O4からなる結晶子(スピネル型の結晶構造を有する結晶子)と、Li2MnO3からなる結晶子(層状岩塩型の結晶構造を有する結晶子)の複合材料を正極活物質に用いる。このリチウムマンガン複合酸化物は、構造的安定性に優れており、優れた容量特性を示す。
【選択図】図1
Description
新規材料の製造方法を以下に詳述する。
本実施の形態では、実施の形態1とは異なる製造方法で、新規材料を得る。
新規材料の製造方法を以下に詳述する。
本実施の形態では、実施の形態1、実施の形態2、または実施の形態3で示した製造方法により製造した正極活物質を用いた蓄電池の構造について、図6乃至図8を参照して説明する。
図6(A)は、コイン型(単層偏平型)の蓄電池の外観図であり、図6(B)は、その断面図である。
次に、ラミネート型の蓄電池の一例について、図7を参照して説明する。
次に、円筒型の蓄電池の一例について、図8を参照して説明する。円筒型の蓄電池600は図8(A)に示すように、上面に正極キャップ(電池蓋)601を有し、側面及び底面に電池缶(外装缶)602を有している。これら正極キャップと電池缶(外装缶)602とは、ガスケット(絶縁パッキン)610によって絶縁されている。
102:層状岩塩型の結晶構造の結晶子
103:Li2MnO3粒子
104:Spi−LiMn2O4粒子
105:焼結された材料
300 蓄電池
301 正極缶
302 負極缶
303 ガスケット
304 正極
305 正極集電体
306 正極活物質層
307 負極
308 負極集電体
309 負極活物質層
310 セパレータ
400 蓄電池
402 正極
404 負極
500 蓄電池
501 正極集電体
502 正極活物質層
503 正極
504 負極集電体
505 負極活物質層
506 負極
507 セパレータ
508 電解液
509 外装体
600 蓄電池
601 正極キャップ
602 電池缶
603 正極端子
604 正極
605 セパレータ
606 負極
607 負極端子
608 絶縁板
609 絶縁板
611 PTC素子
612 安全弁機構
Claims (9)
- 層状岩塩型の結晶構造を有する一つの粒子の表面の一部にスピネル型の結晶構造を有するリチウムマンガン複合酸化物。
- 一つの粒子がスピネル型の結晶構造と、該スピネル型の結晶構造と接する層状岩塩型の結晶構造とを有するリチウムマンガン複合酸化物。
- 請求項1または請求項2において、前記スピネル型の結晶構造を有する結晶子はLiMn2O4であるリチウムマンガン複合酸化物。
- 請求項1乃至3のいずれか一において、前記層状岩塩型の結晶構造を有する結晶子はLi2MnO3であるリチウムマンガン複合酸化物。
- Li2CO3とMnCO3の仕込み比を0.88:1.09(Li2CO3:MnCO3)〜0.98:1.01(Li2CO3:MnCO3)の範囲として、それぞれの粒子を混合し、
500℃以上1000℃以下の熱処理を行うことを特徴とするリチウムマンガン複合酸化物の製造方法。 - Li2CO3とMnCO3の仕込み比を0.91:1.06(Li2CO3:MnCO3)〜0.95:1.03(Li2CO3:MnCO3)の範囲として、それぞれの粒子を混合し、
500℃以上1000℃以下の熱処理を行うことを特徴とするリチウムマンガン複合酸化物の製造方法。 - 同一粒子内にスピネル型の結晶構造を有するLiMn2O4と、層状岩塩型の結晶構造であるLi2MnO3とを有し、
前記スピネル型の結晶構造が占める割合は、全体の約2%以上約15%以下であるリチウムマンガン複合酸化物。 - 同一粒子内にスピネル型の結晶構造を有するLiMn2O4と、層状岩塩型の結晶構造であるLi2MnO3とを有し、
前記スピネル型の結晶構造が占める割合は、全体の約5%以上約10%以下であるリチウムマンガン複合酸化物。 - 請求項1乃至8のいずれか一において、前記リチウムマンガン複合酸化物を正極活物質として用いたリチウムイオン二次電池。
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JPWO2016103113A1 (ja) * | 2014-12-26 | 2017-11-24 | 株式会社半導体エネルギー研究所 | 負極活物質、二次電池、負極の作製方法、および負極の処理装置 |
JP2019087435A (ja) * | 2017-11-08 | 2019-06-06 | 国立研究開発法人産業技術総合研究所 | リチウム二次電池用の正極材料およびその製造方法 |
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JP2020087638A (ja) * | 2018-11-21 | 2020-06-04 | 株式会社豊田中央研究所 | リチウムマンガン複合酸化物、リチウム二次電池及びリチウムマンガン複合酸化物の製造方法 |
JP7193315B2 (ja) | 2018-11-21 | 2022-12-20 | 株式会社豊田中央研究所 | リチウムマンガン複合酸化物、リチウム二次電池及びリチウムマンガン複合酸化物の製造方法 |
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Also Published As
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JP6362403B2 (ja) | 2018-07-25 |
KR20160006747A (ko) | 2016-01-19 |
TW201507249A (zh) | 2015-02-16 |
CN105164054B (zh) | 2019-05-14 |
WO2014181885A1 (en) | 2014-11-13 |
TWI619298B (zh) | 2018-03-21 |
DE112014002346T5 (de) | 2016-02-18 |
US20140332715A1 (en) | 2014-11-13 |
US9666326B2 (en) | 2017-05-30 |
DE112014002346B4 (de) | 2021-07-29 |
CN105164054A (zh) | 2015-12-16 |
KR102240980B1 (ko) | 2021-04-16 |
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