JP7117539B2 - 負極活物質および電池 - Google Patents
負極活物質および電池 Download PDFInfo
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- JP7117539B2 JP7117539B2 JP2018110877A JP2018110877A JP7117539B2 JP 7117539 B2 JP7117539 B2 JP 7117539B2 JP 2018110877 A JP2018110877 A JP 2018110877A JP 2018110877 A JP2018110877 A JP 2018110877A JP 7117539 B2 JP7117539 B2 JP 7117539B2
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- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
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- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
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- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/027—Negative electrodes
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- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/028—Positive electrodes
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- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
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- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
- H01M50/491—Porosity
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Description
以下、本開示の負極活物質を得るに至った経緯が説明される。
本開示の第1の態様に係る負極活物質は、下記の組成式(1)で表される化合物を含む、負極活物質。
ここで、前記組成式(1)において、Meは、Mn、Fe、Co、Ni、およびCuからなる群より選択されるいずれか1種の元素の単体、または、Mn、Fe、Co、Ni、およびCuからなる群より選択される少なくともいずれか1種の元素を含む固溶体であり、かつ、xは、0.5≦x≦0.9を満たす。
以下、本開示の実施形態を詳細に説明する。なお、以下の実施形態は一例であり、本開示は以下の形態に限定されない。
第1の実施形態では、本開示の負極活物質の実施形態が説明される。
ここで、前記組成式(1)において、Meは、Mn、Fe、Co、Ni、およびCuからなる群より選択されるいずれか1種の元素の単体、または、Mn、Fe、Co、Ni、およびCuからなる群より選択される少なくともいずれか1種の元素を含む固溶体であり、かつ、xは、0.5≦x≦0.9を満たす。
(充放電反応(インターカレーション反応))
MαXβ+γLi++γe- ⇔ LiγMαXβ ・・・(2)
(充放電反応(コンバージョン反応))
MαXβ+γLi++γe- ⇔ αM+LiγXβ ・・・(3)
MαXβ+nβLi++nβe- ⇔ αM+βLinX ・・・(4)
α(MgxMe1-xO1-xH2x)+γLi++γe-
⇔MgαxMeα(1-x)+εLiH+ηLi2O ・・・(5)
ここで、上記式(5)において、εおよびηは、ε=γ-2α(1-x)、η=α(1-x)を満たす。
(a)Mn、Fe、Co、Ni、およびCuからなる群より選択されるいずれか1種の元素の単体;
(b)Mn、Fe、Co、Ni、およびCuからなる群より選択される2種以上の元素からなる固溶体;
(c)Mn、Fe、Co、Ni、およびCuからなる群より選択される1種以上の元素と、当該元素以外の他の元素との固溶体。
第2の実施形態では、本開示の電池の実施形態が説明される。なお、上述の第1の実施形態と重複する説明は、適宜、省略される。
原料粉末として、MgH2とCoOとを、MgH2/CoO=9/1(モル比)となるようにそれぞれ秤量した。得られた原料粉末を、適量のφ3mmのジルコニア製ボールと共に、45ccジルコニア製容器に入れ、酸素値1ppm以下のAr雰囲気のグローブボックス内で密閉した。原料をグローブボックスから取り出し、遊星型ボールミルで、600rpmで30時間処理した。これにより、負極活物質のサンプル1を得た。
原料粉末MeOの種類、および/または、MgH2とMeOのモル比が表1に示されるように変更したこと以外は、サンプル1と同じ作製方法で、負極活物質のサンプル2~19を作製した。
サンプル1~21を用いた試験セルの充放電試験を行い、それらの充放電特性を評価した。試験セルの充放電試験は、25℃の恒温槽内で行った。充放電試験では、試験電極の充電を行い、20分間休止した後に放電を行う試験を行った。初回充電容量、初回放電容量、充放電効率を、以下の方法で評価した。
11 ケース
12 正極集電体
13 正極活物質層
14 セパレータ
15 封口板
16 負極集電体
17 負極活物質層
18 ガスケット
21 正極
22 負極
Claims (6)
- 組成式MgxMe1-xO1-xH2xで表される化合物を含む、負極活物質。
ここで、Meは、Mn、Fe、Co、Ni、およびCuからなる群より選択される少なくとも1種であり、xは、0.5≦x≦0.9を満たす。 - xが、さらに、0.7≦x≦0.9を満たす、
請求項1に記載の負極活物質。 - Meは、Mn、Co、Ni、およびCuからなる群より選択される1種である、
請求項2に記載の負極活物質。 - Meは、CoまたはNiであり、
xが、さらに、0.80≦x≦0.85を満たす、
請求項3に記載の負極活物質。 - Meは、Mn、FeおよびCuからなる群より選択される少なくとも1種を含む、
請求項1に記載の負極活物質。 - 請求項1から5のいずれか一項に記載の負極活物質を含む負極と、
正極と、
電解質とを備える、
電池。
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JP2017127035 | 2017-06-29 |
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JP2019012686A JP2019012686A (ja) | 2019-01-24 |
JP7117539B2 true JP7117539B2 (ja) | 2022-08-15 |
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Cited By (1)
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WO2007138964A1 (ja) * | 2006-05-25 | 2007-12-06 | Denka Seiken Co., Ltd. | 免疫測定用ラテックス組成物 |
Citations (1)
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JP2012038697A (ja) | 2010-07-15 | 2012-02-23 | Toyota Motor Corp | 負極材料、金属二次電池、および負極材料の製造方法 |
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US7736805B2 (en) | 2007-05-16 | 2010-06-15 | Gm Global Technology Operations, Inc. | Lithium hydride negative electrode for rechargeable lithium batteries |
JP5534010B2 (ja) | 2010-07-15 | 2014-06-25 | トヨタ自動車株式会社 | 負極材料の製造方法、負極材料、リチウム二次電池の製造方法、リチウム二次電池 |
JP5521976B2 (ja) | 2010-10-26 | 2014-06-18 | トヨタ自動車株式会社 | 負極材料の製造方法、当該製造方法により製造される負極材料、及び当該負極材料を含む金属二次電池 |
JP2015187970A (ja) | 2014-03-10 | 2015-10-29 | 株式会社豊田自動織機 | 負極材料、蓄電装置、及び蓄電装置用電極の製造方法とその装置 |
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- 2018-06-11 JP JP2018110877A patent/JP7117539B2/ja active Active
- 2018-06-14 US US16/008,026 patent/US10505220B2/en active Active
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JP2012038697A (ja) | 2010-07-15 | 2012-02-23 | Toyota Motor Corp | 負極材料、金属二次電池、および負極材料の製造方法 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007138964A1 (ja) * | 2006-05-25 | 2007-12-06 | Denka Seiken Co., Ltd. | 免疫測定用ラテックス組成物 |
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US20190006705A1 (en) | 2019-01-03 |
JP2019012686A (ja) | 2019-01-24 |
US10505220B2 (en) | 2019-12-10 |
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