JP4721000B2 - 蓄電デバイス - Google Patents
蓄電デバイス Download PDFInfo
- Publication number
- JP4721000B2 JP4721000B2 JP2005517910A JP2005517910A JP4721000B2 JP 4721000 B2 JP4721000 B2 JP 4721000B2 JP 2005517910 A JP2005517910 A JP 2005517910A JP 2005517910 A JP2005517910 A JP 2005517910A JP 4721000 B2 JP4721000 B2 JP 4721000B2
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- JP
- Japan
- Prior art keywords
- storage device
- chemical formula
- positive electrode
- nitroxyl
- polymer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 31
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- 229910052717 sulfur Chemical group 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 229940113082 thymine Drugs 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
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Description
本発明の蓄電デバイスは、酸化状態において下記化学式(I)で示されるニトロキシルカチオン部分構造をとり、還元状態において下記化学式(II)で示されるニトロキシルラジカル部分構造をとるニトロキシル高分子を正極中に含有し、その2つの状態間で電子の授受を行う下記反応式(B)で示される反応を正極の電極反応として用いる蓄電デバイスにおいて、負極活物質としてリチウムもしくはリチウム合金を利用し、かつ、前記正極と前記負極とが直接接触していることを特徴としている。
リチウムもしくはリチウム合金負極と接したニトロキシル高分子が、リチウムもしくはリチウム合金負極表面で触媒効果を示すことにより、負極表面でのデンドライト成長が抑制され、蓄電デバイスのサイクル特性が向上する。
2 絶縁パッキン
3 リチウムもしくはリチウム合金負極
4 ニトロキシル高分子を含む正極
5 正極用集電体
6 正極用金属集電体
次に、本発明の実施の形態について図面を参照して詳細に説明する。
次に図1を参照して、第1の実施の形態の製造方法を説明する。
上記第1の実施の形態において、コイン型であった蓄電デバイスの形状を、従来公知の形状にすることができる。蓄電デバイス形状の例としては、電極の積層体あるいは巻回体を、金属ケース、樹脂ケース、あるいはラミネートフィルム等によって封止したものが挙げられる。また外観としては、円筒型、角型、コイン型、およびシート型等が挙げられる。
還流管を付けた100mlナスフラスコ中に、2,2,6,6−テトラメチルピペリジン メタクリレート モノマー20g(0.089mol)を入れ、乾燥テトラヒドロフラン80mlに溶解させた。そこへ、アゾビスイソブチロニトリル(AIBN)0.29g(0.00178mol)(モノマー/AIBN=50/l)を加え、アルゴン雰囲気下75〜80℃で攪拌した。6時間反応後、室温まで放冷した。へキサン中でポリマーを析出させて濾別し、減圧乾燥してポリ(2,2,6,6−テトラメチルピペリジン メタクリレート)18g(収率90%)を得た。次に、得られたポリ(2,2,6,6−テトラメチルピペリジン メタクリレート)10gを乾操ジクロロメタン100mlに溶解させた。ここへm−クロロ過安息香酸15.2g(0.088mol)のジクロロメタン溶液100mlを室温にて攪拌しながら1時間かけて滴下した。さらに6時間攪拌後、沈殿したm−クロロ安息香酸を濾別して除き、濾液を炭酸ナトリウム水溶液および水で洗浄後、ジクロロメタンを留去した。残った固形分を粉砕し、得られた粉末をジエチルカーボネート(DEC)で洗浄し、減圧下乾燥させて、下記化学式(16)で示されるポリ(2,2,6,6−テトラメチルピペリジノキシ メタクリレート)(PTMA)7.2gを得た(収率68.2%、茶褐色粉末)。得られた高分子の構造はIRで確認した。また、GPCにより測定した結果、重量平均分子量Mw=89000、分散度Mw/Mn=3.30という値が得られた。ESRスペクトルにより求めたスピン濃度は2.26×1021spin/gであった。これはポリ(2,2,6,6−テトラメチルピペリジン メタクリレート)のN−H基が、N−Oラジカルへ90%転化されると仮定した場合のスピン濃度と一致する。
小型ホモジナイザ容器に純水20gを測り取り、テフロン(登録商標)粒子およびセルロースからなるバインダー272mgを加えて3分間攪拌し完全に溶解させた。そこにアセチレンブラック2.0gを加え、15分間攪拌してスラリーを得た。得られたスラリーを厚さ20ミクロンのアルミニウム板上に薄く塗布し、100℃で乾燥させて導電補助層を作製した。導電補助層の厚みは10ミクロンであった。このようにして、炭素を主成分とする導電補助層とアルミニウム板とが一体化された正極用集電体が得られた。
小型ホモジナイザ容器にN−メチルピロリドン20gを測り取り、合成した化学式(17)のポリアクリレート1.0gを加えて5分間攪拌し完全に溶解させた。それ以降は、実施例1と同様の方法で実施し、コイン型蓄電デバイスを得た。
小型ホモジナイザ容器にN−メチルピロリドン20gを測り取り、合成した化学式(18)のポリメタクリレート1.0gを加えて5分間攪拌し完全に溶解させた。それ以降は、実施例1と同様の方法で実施し、コイン型蓄電デバイスを得た。
小型ホモジナイザ容器にN−メチルピロリドン20gを測り取り、合成した化学式(19)のポリメタクリレート1.0gを加えて5分間攪拌し完全に溶解させた。それ以降は、実施例1と同様の方法で実施し、コイン型蓄電デバイスを得た。
負極としてリチウム−スズ合金負極を使用する以外は、実施例1と同様の方法で実施し、コイン型蓄電デバイスを得た。
負極としてリチウム−シリコン合金負極を使用する以外は、実施例1と同様の方法で実施し、コイン型蓄電デバイスを得た。
小型ホモジナイザ容器にN−メチルピロリドン20gを測り取り、合成した化学式(16)のポリメタクリレート1.0gを加えて5分間攪拌し完全に溶解させた。得られた溶液を、厚み110ミクロンのカーボンペーパー(空隙率:80%、室温における電気抵抗率:80mΩ・cm(厚み方向)、6.3mΩ・cm(面方向))上に薄く塗布し、125℃で乾燥させて電極を作製した。電極の厚みは50ミクロンであった。それ以降は、実施例1と同様の方法で実施し、コイン型蓄電デバイスを得た。
小型ホモジナイザ容器にN−メチルピロリドン20gを測り取り、合成した化学式(16)のポリメタクリレート1.0gを加えて5分間攪拌し完全に溶解させた。得られた溶液を、炭素を主成分とする導電補助層とアルミニウム板とが一体化された正極用集電体上に薄く塗布し、125℃で乾燥させて電極を作製した。電極の厚みは50ミクロンであった。
小型ホモジナイザ容器にN−メチルピロリドン20gを測り取り、合成した化学式(17)のポリアクリレート1.0gを加えて5分間攪拌し完全に溶解させた。それ以降は、比較例1と同様の方法で実施し、コイン型蓄電デバイスを得た。
小型ホモジナイザ容器にN−メチルピロリドン20gを測り取り、合成した化学式(18)のポリメタクリレート1.0gを加えて5分間攪拌し完全に溶解させた。それ以降は、比較例1と同様の方法で実施し、コイン型蓄電デバイスを得た。
小型ホモジナイザ容器にN−メチルピロリドン20gを測り取り、合成した化学式(19)のポリメタクリレート1.0gを加えて5分間攪拌し完全に溶解させた。それ以降は、比較例1と同様の方法で実施し、コイン型蓄電デバイスを得た。
負極としてリチウム−スズ合金負極を使用する以外は、比較例1と同様の方法で実施し、コイン型蓄電デバイスを得た。
負極としてリチウム−シリコン合金負極を使用する以外は、比較例1と同様の方法で実施し、コイン型蓄電デバイスを得た。
小型ホモジナイザ容器にN−メチルピロリドン20gを測り取り、合成した化学式(16)のポリメタクリレート1.0gを加えて5分間攪拌し完全に溶解させた。得られた溶液を、厚み110ミクロンのカーボンペーパー(空隙率:80%、室温における電気抵抗率:80mΩ・cm(厚み方向)、6.3mΩ・cm(面方向))上に薄く塗布し、125℃で乾燥させて電極を作製した。電極の厚みは50ミクロンであった。それ以降は、比較例1と同様の方法で実施し、コイン型蓄電デバイスを得た。
Claims (6)
- 前記負極活物質として、リチウム−スズ系の合金もしくはリチウム−シリコン系の合金を用いることを特徴とする請求項1記載の蓄電デバイス。
- 正極用集電体として、炭素を主成分とする導電補助層をアルミニウム電極上に一体化形成した正極用集電体を用いることを特徴とする請求項1または2に記載の蓄電デバイス。
- 正極用集電体として、カーボンペーパーを用いることを特徴とする請求項1または2に記載の蓄電デバイス。
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US7211237B2 (en) * | 2003-11-26 | 2007-05-01 | 3M Innovative Properties Company | Solid state synthesis of lithium ion battery cathode material |
JP5167584B2 (ja) * | 2005-12-01 | 2013-03-21 | 日本電気株式会社 | 非水電解液二次電池 |
JP5066804B2 (ja) * | 2005-12-05 | 2012-11-07 | 日本電気株式会社 | リチウムイオン二次電池 |
JP5066805B2 (ja) * | 2005-12-12 | 2012-11-07 | 日本電気株式会社 | 蓄電デバイス |
JP5493356B2 (ja) * | 2006-06-06 | 2014-05-14 | 日本電気株式会社 | ポリラジカル化合物製造方法及び電池 |
JP5176130B2 (ja) * | 2007-05-09 | 2013-04-03 | 日本電気株式会社 | ポリラジカル化合物、電極活物質および電池 |
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JP4637293B2 (ja) * | 2008-07-03 | 2011-02-23 | Dic株式会社 | 二次電池およびその導電補助層用カーボンインキ |
US20120171561A1 (en) * | 2009-09-18 | 2012-07-05 | Nec Corporation | Polymer radical material-activated carbon-conductive material composite, method for producing conductive material composite, and electricity storage device |
JP5182534B2 (ja) | 2010-02-09 | 2013-04-17 | 株式会社村田製作所 | 二次電池 |
US9153820B2 (en) * | 2010-06-30 | 2015-10-06 | Zeon Corporation | Binder composition for non-aqueous battery electrode, electrolyte solution composition for non-aqueous battery, and use thereof |
KR101155920B1 (ko) * | 2010-07-16 | 2012-06-20 | 삼성에스디아이 주식회사 | 전극 어셈블리 및 이를 이용한 이차 전지 |
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JP2002117855A (ja) * | 2000-10-06 | 2002-04-19 | Nec Corp | 二次電池およびその製造方法 |
JP2002170568A (ja) * | 2000-12-01 | 2002-06-14 | Nec Corp | 電 池 |
JP2002304996A (ja) * | 2001-04-03 | 2002-10-18 | Nec Corp | 蓄電デバイス |
JP2003022809A (ja) * | 2001-07-09 | 2003-01-24 | Nec Corp | 電池および電池用電極 |
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