JP6931796B2 - 電気化学デバイス - Google Patents
電気化学デバイス Download PDFInfo
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- JP6931796B2 JP6931796B2 JP2017096326A JP2017096326A JP6931796B2 JP 6931796 B2 JP6931796 B2 JP 6931796B2 JP 2017096326 A JP2017096326 A JP 2017096326A JP 2017096326 A JP2017096326 A JP 2017096326A JP 6931796 B2 JP6931796 B2 JP 6931796B2
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- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
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- H01M4/1391—Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
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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
Description
実施の形態1における負極活物質は、空間群Fm3mに属する結晶構造を有する化合物を含む。
LixTiyOz・・・式(1)
ここで、0.4≦x/y<2、かつ、x/2+3y/2≦z≦x/2+2y、を満たす。
実施の形態1における負極活物質は、例えば、以下の方法により、作製することができる。
以下、実施の形態2が説明される。なお、上述の実施の形態1と重複する説明は、適宜、省略される。
[負極活物質の作製]
原料を用意する工程、原料をメカノケミカルに反応させる工程、の2段階のステップで、負極活物質を作製した。
得られた負極活物質と導電助剤アセチレンブラックと結着剤ポリフッ化ビニリデンとを、重量比7:2:1となるよう秤量した。
上記の試験電極を用いて、リチウム金属を対極および参照極とするリチウム二次電池(評価用セル)を作製した。
評価用セルの充放電試験を行い、充放電特性を評価した。
原料を用意する工程において、Li2OとTiO2をLi2O/TiO2=3.0/5.0モル比でそれぞれ秤量した。
原料を用意する工程において、Li2OとTiO2をLi2O/TiO2=2.0/5.0モル比でそれぞれ秤量した。
原料を用意する工程において、Li2OとTiO2をLi2O/TiO2=1.5/5.0モル比でそれぞれ秤量した。
原料を用意する工程において、Li2OとTiO2をLi2O/TiO2=1.0/5.0モル比でそれぞれ秤量した。
原料を用意する工程において、公知の手法を用いてスピネル(空間群Fd3m)構造のリチウムチタン酸化物(Li4Ti5O12)を得た。すなわち、LiOHとTiO2をLiOH/TiO2=4.0/5.0モル比でそれぞれ秤量し、大気雰囲気下、700℃で12時間焼成した。以上の工程により、当該リチウムチタン酸化物を作製した。
公知の手法を用いて作製したスピネル(空間群Fd3m)構造のリチウムチタン酸化物(Li4Ti5O12)を比較例1の負極活物質として用いた。すなわち、LiOHとTiO2をLiOH/TiO2=4.0/5.0モル比でそれぞれ秤量し、大気雰囲気下、700℃で12時間焼成した。以上の工程により、比較例1の負極活物質を作製した。
原料を用意する工程において、Li2OとTiO2をLi2O/TiO2=1.0/1.0モル比でそれぞれ秤量した。
実施例1〜6の負極活物質は、197〜302mAh/gの初回放電容量を有する。
11 負極集電体
12 負極合剤層
13 負極
14 正極集電体
15 正極合剤層
16 正極
17 セパレータ
18 外装
Claims (3)
- 負極活物質を含む負極と、
正極と、
電解質と、
を備え、
前記負極活物質は、空間群Fm3mに属する結晶構造を有し、下記の組成式(1)により表される化合物を含み、
LixTiyOz・・・式(1)
ここで、
0.4≦x/y≦0.6、
x/2+3y/2≦z≦x/2+2y、
を満たす、
電気化学デバイス。 - z=x/2+2y、を満たす、
請求項1に記載の電気化学デバイス。 - 前記負極は、前記負極活物質を、主成分として、含む、
請求項1または2に記載の電気化学デバイス。
Applications Claiming Priority (2)
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JP2016105985 | 2016-05-27 | ||
JP2016105985 | 2016-05-27 |
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JP2017216225A JP2017216225A (ja) | 2017-12-07 |
JP6931796B2 true JP6931796B2 (ja) | 2021-09-08 |
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US (1) | US10797315B2 (ja) |
JP (1) | JP6931796B2 (ja) |
CN (1) | CN107437618B (ja) |
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US11303707B1 (en) * | 2018-08-14 | 2022-04-12 | Joelle Adler | Internet of things sanitization system and method of operation through a blockchain network |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
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JP4949561B2 (ja) * | 2001-03-27 | 2012-06-13 | 東邦チタニウム株式会社 | リチウムイオン二次電池電極活物質製造原料としての二酸化チタン粉、リチウムイオン二次電池電極活物質としてのチタン酸リチウムおよびその製造方法 |
JP3687665B2 (ja) | 2002-07-16 | 2005-08-24 | 日亜化学工業株式会社 | 非水電解液二次電池用正極活物質および非水電解液二次電池 |
JP2004235144A (ja) * | 2003-01-10 | 2004-08-19 | Nichia Chem Ind Ltd | 非水電解質二次電池用負極活物質および非水電解質二次電池 |
CN101481148B (zh) * | 2006-04-12 | 2011-06-22 | 松下电器产业株式会社 | 正极活性材料、其制备方法和非水电解质二次电池 |
US20090004563A1 (en) * | 2007-06-28 | 2009-01-01 | Zhimin Zhong | Substituted lithium titanate spinel compound with improved electron conductivity and methods of making the same |
JP5228393B2 (ja) * | 2007-07-31 | 2013-07-03 | 株式会社Gsユアサ | リチウムイオン二次電池 |
WO2010052950A1 (ja) | 2008-11-04 | 2010-05-14 | 国立大学法人岩手大学 | 不定比チタン化合物、その炭素複合体、それら化合物の製造方法、及びそれら化合物を含むリチウムイオン二次電池用負極活物質、並びにそれを用いたリチウムイオン二次電池 |
CN101587948B (zh) * | 2009-06-19 | 2011-05-18 | 中南大学 | 一种Li4Ti5O12/C复合电极材料的制备方法 |
JP5509715B2 (ja) * | 2009-08-05 | 2014-06-04 | セイコーエプソン株式会社 | リチウム電池用電極及びリチウム電池 |
JP5916007B2 (ja) * | 2011-09-28 | 2016-05-11 | 日本ケミコン株式会社 | チタン酸リチウムとカーボンナノファイバーとの複合体の製造方法 |
KR20130067139A (ko) * | 2011-12-13 | 2013-06-21 | 삼성전자주식회사 | 보호음극, 이를 포함하는 리튬공기전지 및 이를 포함하는 전고체 전지 |
JP5497094B2 (ja) * | 2012-03-29 | 2014-05-21 | 太陽誘電株式会社 | リチウムチタン複合酸化物、それを用いた電池用電極およびリチウムイオン二次電池 |
EP2980893B1 (en) * | 2013-03-27 | 2017-09-13 | GS Yuasa International Ltd. | Active material for nonaqueous electrolyte energy storage elements |
CA2914443C (en) * | 2013-06-05 | 2021-10-12 | Johnson Matthey Public Limited Company | Process for the preparation of lithium titanium spinel and its use |
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2017
- 2017-03-10 CN CN201710141017.2A patent/CN107437618B/zh active Active
- 2017-05-15 JP JP2017096326A patent/JP6931796B2/ja active Active
- 2017-05-17 US US15/597,179 patent/US10797315B2/en active Active
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US20170346091A1 (en) | 2017-11-30 |
US10797315B2 (en) | 2020-10-06 |
CN107437618B (zh) | 2022-01-28 |
CN107437618A (zh) | 2017-12-05 |
JP2017216225A (ja) | 2017-12-07 |
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