JP2006260952A - 電気化学デバイス - Google Patents
電気化学デバイス Download PDFInfo
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- JP2006260952A JP2006260952A JP2005077074A JP2005077074A JP2006260952A JP 2006260952 A JP2006260952 A JP 2006260952A JP 2005077074 A JP2005077074 A JP 2005077074A JP 2005077074 A JP2005077074 A JP 2005077074A JP 2006260952 A JP2006260952 A JP 2006260952A
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- molten salt
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Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- 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
- H01M10/0566—Liquid materials
- H01M10/0568—Liquid materials characterised by the solutes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/54—Electrolytes
- H01G11/58—Liquid electrolytes
- H01G11/62—Liquid electrolytes characterised by the solute, e.g. salts, anions or cations therein
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/002—Inorganic electrolyte
- H01M2300/0022—Room temperature molten salts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
-
- H—ELECTRICITY
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Abstract
Description
Takaya Sato, Tatsuya Maruo, Shoko Marukane, and Kentaro Takagi, Journal of Power Sources, 138 (2004) 253
第一の実施の形態に係るリチウムイオン二次電池について、図1を参照して説明する。
本実施の形態の非水電解質は、式(1)もしくは式(2)で示すカチオンを含む常温溶融塩を有することを特徴とする。なお、式(1)について、立体異性を規定するものではなく、式(2)について、共鳴形を規定するものではなく、R4とR5とは相互に置換可能である。
本実施の形態によれば、式(1)もしくは式(2)で示すカチオンは、初回充電時に、安定な被膜を負極上に形成する。
本実施の形態では、負極もしくは正極のいずれかは、層状の結晶構造を備える物質を含むことを特徴とする。負極の場合、負極活物質または導電剤として、層状の結晶構造を備える物質を有する。なお、負極活物質として層状の結晶構造を備える物質を含む方が、本実施の形態の効果はより顕著に表れる。負極活物質の方が、負極中の含有比率が高いためである。
本実施の形態では、負極もしくは正極のいずれかは、層状の結晶構造を備える物質を含むことを特徴とする。正極の場合、導電剤として、層状の結晶構造を備える物質を有する。
セパレータとしては、例えば、ポリエチレン、ポリプロピレンまたはポリビニリデンフルオライド(PVdF)を含む多孔質フィルムや、合成樹脂製不織布、あるいはガラス繊維製不織布などを用いることができる。
容器としては、金属製容器やラミネート製フィルムからなる容器を用いることができる。
第二の実施の形態に係る電気二重層キャパシターについて、便宜上、第一の実施の形態と異なる箇所について説明する。
4−クロロー1,3−ジオキソランー2−オンとジメチルアミンをアセトニトリル中0℃で6時間反応した。反応溶液の体積が1/2になるまでアセトニトリルを留去し、酢酸エチルを加え、生じた沈殿をろ過、減圧乾燥した。得られた粉末とLiTFSIをアセトニトリル中室温で6時間反応した。生じた沈殿物を除去し、アセトニトリルを減圧留去することにより式(11)で表される化合物を得た。
非水電解質として、ジメチルエチルブチルアンモニウムTFSIに1モル/Lの割合でLiTFSIを溶解することにより非水電解質を調製した。この非水電解質を用いたこと以外は、実施例1と同様の方法により、リチウムイオン二次電池を作製し、充放電サイクル試験を実施した。
非水電解質として、体積比の混合割合が(ビニレンカーボネ−ト(VC)):(ジメチルエチルブチルアンモニウムTFSI)=1:99、5:95、50:50となるように溶液を調製した。この溶液に、1モル/Lの割合でLiTFSIを溶解することにより非水電解質を調整した。この非水電解質を用いたこと以外は、実施例1と同様の方法により、リチウムイオン二次電池を作製し、充放電サイクル試験を実施した。
2…正極集電体
3…正極
4…セパレータ
5…負極
6…負極封口板
7…絶縁ガスケット
Claims (8)
- 前記R1もしくはR4は、式(4)で表され、前記R8はメチレン基であることを特徴とする請求項1記載の電気化学デバイス。
- 前記R2はメチル基、エチル基、プロピル基、イソプロピル基、(2−メトキシ)プロピル基、ブチル基、イソブチル基、secブチル基およびtertブチル基のいずれかから選ばれ、前記R3はメチル基およびエチル基のいずれかから選ばれ、あるいは前記R2および前記R3は、R2とR3とが結合して構成されるピロリジル基およびピペリジル基のいずれかから選ばれることを特徴とする請求項1乃至3のいずれか1項に記載の電気化学デバイス。
- 前記R5はメチル基であることを特徴とする請求子1乃至4のいずれか1項に記載の電気化学デバイス。
- 前記常温溶融塩の含有量は、前記非水電解質に対し1体積%以上50体積%以下であることを特徴とする請求項1乃至5のいずれか1項に記載の電気化学デバイス。
- 前記層状の結晶構造を備える物質は、炭素質物であることを特徴とする請求項1乃至6のいずれか1項に記載の電気化学デバイス。
- 前記第1および第2の電極の一方は正極であり、他方は負極であり、前記非水電解質はリチウムイオンを有することを特徴とする請求項1乃至7のいずれか1項に記載の電気化学デバイス。
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