JP6993167B2 - カーボネートを有する水系電解質及びそれを用いた電池 - Google Patents
カーボネートを有する水系電解質及びそれを用いた電池 Download PDFInfo
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Description
(i)フルオロアルキルスルホニル塩、
(ii)有機カーボネート、及び
(iii)水。
2032-型コインセルに、導電性集電体上にPVdFバインダー及び導電性炭素と組み合わせたLi4Ti5O12を有するアノードを取り付ける。この電池(セル)に、導電性集電体上にPVdFバインダー及び導電性炭素と組み合わせたLiNi0.5Mn1.5O4から形成されたカソードをさらに取り付ける。すべてのアノード及びカソードはガラスファイバーセパレータによって分離されており、ここで、このガラスファイバーセパレータは、電解質組成物で浸潤されている。かような電池が4つ準備され、それぞれの電池において以下の電解質組成物が使用される:(i)モル比1:1:1のLiTFSI:DEC:水、(ii)モル比1:1:1のLiTFSI:DMC:水、(iii)モル比1:1:1のLiTFSI:EC:水、及び(iv)モル比1:1:1のLiTFSI:PC:水。モル比1:1:1のLiTFSI:DEC:水の電解質組成物を有する電池に対して、標準手順に従い、約-0.8Vから6.2Vの電位範囲にわたって、サイクリックボルタンメトリーが分析される。
4つの電池のそれぞれに対して、1.0mA/cm2のレートで、3.4又は3.5Vのカットオフで充電し、そして1.0mA/cm2のレートで、2.5~2.8Vのカットオフで放電させた。評価温度は25℃である。電位をモニターし、実施例1~4の電池(i)~(iv)の結果は、それぞれ図6~9に示される。
Claims (18)
- リチウムビス(フルオロスルホニル)イミド(LiFSI)、
リチウムビス(トリフルオロメタン)スルホンアミド(LiTFSI)、
リチウムビス(ペルフルオロエタンスルホニル)イミド(LiBETI)及び
これらの組合せからなる群より選択される、リチウムフルオロアルキルスルホニル塩、
ジメチルカーボネート、
ジエチルカーボネート、
エチレンカーボネート、
プロピレンカーボネート、及び
これらの組合せからなる群より選択される、有機カーボネート、ここでこの有機カーボネートは、前記リチウムフルオロアルキルスルホニル塩に対して、0.1:1~50:1の範囲である第1のモル比で存在する、並びに
水、ここでこの水は、前記リチウムフルオロアルキルスルホニル塩に対して、1:1~5:1の範囲である第2のモル比で存在する、
を有し、かつ
前記水が、前記リチウムフルオロアルキルスルホニル塩の中に分散されている、
電解質組成物。 - 前記第1のモル比が、0.5:1~20:1の範囲(両端の値を含む)である、請求項1に記載の電解質組成物。
- 前記リチウムフルオロアルキルスルホニル塩が、前記電解質組成物の少なくとも0.3のモル分率で存在する、請求項1又は2に記載の電解質組成物。
- 前記リチウムフルオロアルキルスルホニル塩がLiTFSIを含む、請求項1~3のいずれか一項に記載の電解質組成物。
- 前記有機カーボネートがプロピレンカーボネートを含む、請求項1~4のいずれか一項に記載の電解質組成物。
- アノード、
カソード、及び
前記アノードと前記カソードとを互いにイオン連通状態にする、電解質組成物
を含む、リチウムイオン電池であって、
前記電解質組成物が、
リチウムビス(フルオロスルホニル)イミド(LiFSI)、
リチウムビス(トリフルオロメタン)スルホンアミド(LiTFSI)、
リチウムビス(ペルフルオロエタンスルホニル)イミド(LiBETI)及び
これらの組合せからなる群より選択される、リチウムフルオロアルキルスルホニル塩、
ジメチルカーボネート、
ジエチルカーボネート、
エチレンカーボネート、
プロピレンカーボネート、及び
これらの組合せからなる群より選択される、有機カーボネート、ここでこの有機カーボネートは、前記リチウムフルオロアルキルスルホニル塩に対して、0.1:1~50:1の範囲(両端の値を含む)である第1のモル比で存在する、並びに
水、ここでこの水は、前記リチウムフルオロアルキルスルホニル塩に対して、1:1~5:1の範囲(両端の値を含む)である第2のモル比で存在する、
を含み、かつ
前記水が、前記リチウムフルオロアルキルスルホニル塩の中に分散されている、
リチウムイオン電池。 - 前記第1のモル比が、0.5:1~20:1の範囲(両端の値を含む)である、請求項6に記載のリチウム電池。
- 前記リチウムフルオロアルキルスルホニル塩が、前記電解質組成物の少なくとも0.3のモル分率で存在する、請求項6又は7に記載のリチウム電池。
- 前記リチウムフルオロアルキルスルホニル塩がLiTFSIを含む、請求項6~8のいずれか一項に記載のリチウム電池。
- 前記有機カーボネートが環状有機カーボネートを含む、請求項6~9のいずれか一項に記載のリチウム電池。
- 前記有機カーボネートが、ジメチルカーボネート、ジエチルカーボネート、エチレンカーボネート、及びプロピレンカーボネートの少なくとも1つを含む、請求項6~10のいずれか一項に記載のリチウム電池。
- 前記カソードが、前記アノードの酸化還元電位よりも少なくとも2.5V高い酸化還元電位を有する、請求項6~11のいずれか一項に記載のリチウム電池。
- 前記カソードが、前記アノードの酸化還元電位よりも3.0V高い酸化還元電位を有する、請求項6~12のいずれか一項に記載のリチウム電池。
- 前記カソードが、LiMn2O4、LiCoO2、LiFe(PO4)、LiMn1/3Ni1/3Co1/3O2、LiNi0.5Mn1.5O4、及びLiCoPO4の少なくとも1つを含む、請求項6~13のいずれか一項に記載のリチウム電池。
- 前記アノードが、Li4Ti5O12、Mo6S8、Cu2V2O7、TiS4、NbS5、Liテレフタレート(C8H4Li2O4)、シリコン、硫黄、及びグラファイトの少なくとも1つを含む、請求項6~14のいずれか一項に記載のリチウム電池。
- 前記アノードがLi4Ti5O12を含み、かつ前記カソードがLiNi0.5Mn1.5O4を含む、請求項6~15のいずれか一項に記載のリチウム電池。
- 前記アノードがLi4Ti5O12を含み、前記カソードがLiNi0.5Mn1.5O4を含み、前記リチウムフルオロアルキルスルホニル塩がLiTFSIを含み、前記有機カーボネートがプロピレンカーボネートを含み、前記第1のモル比が1:1であり、かつ前記第2のモル比が1:1である、請求項6~16のいずれか一項に記載のリチウム電池。
- リチウムフルオロアルキルスルホニル塩、
有機カーボネート、ここでこの有機カーボネートは、前記リチウムフルオロアルキルスルホニル塩に対して、0.1:1~50:1の範囲である第1のモル比で存在する、及び
水、ここでこの水は、前記リチウムフルオロアルキルスルホニル塩に対して、1:1~5:1の範囲である第2のモル比で存在する、
を有し、
前記リチウムフルオロアルキルスルホニル塩が、電解質組成物の少なくとも0.3のモル分率で存在し、かつ
前記水が、前記リチウムフルオロアルキルスルホニル塩の中に分散されている、
電解質組成物。
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US15/335,563 US10892523B2 (en) | 2016-10-27 | 2016-10-27 | Aqueous electrolyte with carbonate and batteries using the same |
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WO2018168650A1 (ja) * | 2017-03-15 | 2018-09-20 | 住友電気工業株式会社 | 水溶液電解質二次電池 |
JP7203304B2 (ja) * | 2017-09-29 | 2023-01-13 | パナソニックIpマネジメント株式会社 | 水系二次電池 |
WO2019183224A1 (en) * | 2018-03-20 | 2019-09-26 | University Of Maryland, College Park | Electrolytes for rechargeable zn-metal battery |
CN110060882B (zh) * | 2019-05-24 | 2021-09-07 | 中国科学院理化技术研究所 | 一种水系电解液及其应用 |
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JP2007197739A (ja) | 2006-01-24 | 2007-08-09 | Eamex Co | 導電性高分子アクチュエータ素子の製造方法 |
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