JP6214755B2 - 架橋化化合物粒子及びそれを含む二次電池 - Google Patents
架橋化化合物粒子及びそれを含む二次電池 Download PDFInfo
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Description
前記コアは、発泡剤をさらに含むことができる。
[正極の製造]
正極活物質としてLi(Ni6Mn2Co2)O2、導電材(carbon black)、バインダー(PVdF)をそれぞれ94:3:3の重量比でNMP(N−methyl−2−pyrrolidone)に入れてミキシングすることで、正極合剤を製造した。
負極としては天然黒鉛を用い、導電材(carbon black)、スチレンブタジエンゴム(SBR)、カルボキシメチルセルロース(CMC)をそれぞれ94.5:2:2:1.5の重量比でdeionized H2O(蒸留水)に入れてミキシングすることで、負極合剤を製造した。
前記負極と正極との間にSRS分離膜(材料:Toray、無機物層:LG化学、総厚さ16μm)を介在して電極組立体を製造した後、前記電極組立体をパウチ型電池ケースに収納した後、電解液として、エチルカーボネートとジメチルカーボネートとエチルメチルカーボネートが体積比を基準として3:2:5の割合で混合されており、リチウム塩として1MのLiPF6を含んでいるリチウム非水系電解液を使用し、コアとして、アクリロニトリル単量体(モノマー、AN)を含み、シェルとして、ポリアクリロニトリル(PAN)被膜が2μmの厚さに形成されている化合物粒子を添加して、リチウム二次電池を製造した。
化合物粒子を電解液に添加せずに、正極及び負極の表面にコーティングしたこと以外は、実施例1と同様の方法でリチウム二次電池を製造した。
化合物粒子を含んでいない電解液を使用したこと以外は、実施例1と同様の方法でリチウム二次電池を製造した。
添加剤として、アゾビスイソブチロニトリル(Azobisisobytyronitrile、AZDN)を注入し、化合物粒子を含んでいない電解液を使用したこと以外は、実施例1と同様の方法でリチウム二次電池を製造した。
[寿命特性の評価実験]
実施例1及び2と比較例1及び2でそれぞれ製造した電池を、45℃で0.5Cで充/放電を500回行った後、1回目の放電容量に対する300回目及び500回目の放電容量維持率を計算し、下記の表1に示す。
[高温保存特性の評価実験]
実施例1及び2と比較例1及び2でそれぞれ製造した電池を、満充電状態で60℃で3週間貯蔵した後、これらの抵抗増加率及び厚さ増加率を測定し、下記の表1に示す。
実施例1及び2と比較例1及び2でそれぞれ製造した電池を満充電状態で釘刺しテストを行った結果を、下記の表2に示す。
Claims (19)
- コアとして、単量体であるアクリロニトリルと、
シェルとして、熱可塑性樹脂であるポリアクリロニトリル(PAN)を含む被膜とを含むことを特徴とする、リチウムイオンポリマー電池用化合物粒子。 - 前記コアは、重合開始剤を更に含むことを特徴とする、請求項1に記載のリチウムイオンポリマー電池用化合物粒子。
- 前記重合開始剤は、光開始剤、熱開始剤、酸化還元反応開始剤、放射線開始剤、またはこれらの混合物であることを特徴とする、請求項2に記載のリチウムイオンポリマー電池用化合物粒子。
- 前記光開始剤は、α−ヒドロキシケトン系化合物、フェニルグリオキシレート系化合物、ベンジルジメチルケタール系化合物、α−アミノケトン系化合物、モノアシルホスフィン系化合物、ビスアシルホスフィン系化合物、ホスフィンオキシド系化合物、メタロセン系化合物、ヨードニウム塩からなる群から選択された1つ以上であることを特徴とする、請求項3に記載のリチウムイオンポリマー電池用化合物粒子。
- 前記熱開始剤は、アゾ系化合物、パーオキシ系化合物、tert−ブチルペルアセテート、過酢酸、過硫酸カリウムからなる群から選択された1つ以上であることを特徴とする、請求項3に記載のリチウムイオンポリマー電池用化合物粒子。
- 前記酸化還元反応開始剤は、パーサルフェート化合物またはヒドロ過酸化物であることを特徴とする、請求項3に記載のリチウムイオンポリマー電池用化合物粒子。
- 前記放射線は、X線、アルファ粒子ガンマ線及び高エネルギー電子線からなる群から選択される1つ以上であることを特徴とする、請求項3に記載のリチウムイオンポリマー電池用化合物粒子。
- 前記被膜は、バナジウム化合物を含むことを特徴とする、請求項1に記載のリチウムイオンポリマー電池用化合物粒子。
- 前記バナジウム化合物は、バナジウム(II)クロライド、バナジウム(III)クロライド、バナジウムテトラクロライド、バナジウム(II)ブロマイド、バナジウム(III)ブロマイド、バナジウムテトラブロマイド、バナジウム(II)ヨージド、バナジウム(III)ヨージドからなる群から選択された1つ以上であることを特徴とする、請求項8に記載のリチウムイオンポリマー電池用化合物粒子。
- 前記コアは、発泡剤をさらに含むことを特徴とする、請求項1に記載のリチウムイオンポリマー電池用化合物粒子。
- 前記発泡剤は、アゾジカーボンアミド(ADCA)、アゾビスイソブチロニトリル(AIBN)、N,N’−ジメチル−N,N’−ジニトロソ−テレフタレート(NTA)、4,4’−オキシビス(ベンゼンスルホニルヒドラジド)(OBSH)、3,3’−スルホンビス(ベンゼン−スルホニルヒドラジド)、1,1−アゾビスホルムアミド−アゾジカーボンアミド、p−トルエンスルホニルセミカルバジド、バリウムアゾジカルボキシレート(BaAC)からなる群から選択された1つ以上であることを特徴とする、請求項10に記載のリチウムイオンポリマー電池用化合物粒子。
- 前記被膜は、厚さが1μm以上10μm以下の範囲内であることを特徴とする、請求項1に記載のリチウムイオンポリマー電池用化合物粒子。
- 前記被膜は、厚さが2μm以上5μm以下の範囲内であることを特徴とする、請求項1に記載のリチウムイオンポリマー電池用化合物粒子。
- 請求項1〜13のいずれかに記載のリチウムイオンポリマー電池用化合物粒子を含むことを特徴とする、リチウムイオンポリマー電池。
- 前記リチウムイオンポリマー電池用化合物粒子が、電解質、電極、分離膜からなる群から選択されるいずれか1つ以上に含まれていることを特徴とする、請求項14に記載のリチウムイオンポリマー電池。
- 前記リチウムイオンポリマー電池用化合物粒子は、電極活物質と混合されていることを特徴とする、請求項15に記載のリチウムイオンポリマー電池。
- 前記リチウムイオンポリマー電池用化合物粒子は、電極の表面に形成されたコーティング層に含まれていることを特徴とする、請求項15に記載のリチウムイオンポリマー電池。
- 請求項14に記載のリチウムイオンポリマー電池を含むことを特徴とする、リチウムイオンポリマー電池パック。
- 請求項18に記載のリチウムイオンポリマー電池パックを動力源として使用するデバイス。
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CN106252570B (zh) * | 2016-08-31 | 2018-12-21 | 天津市捷威动力工业有限公司 | 一种隔膜用涂层浆料、复合耐热隔膜及其制备方法 |
US10707531B1 (en) | 2016-09-27 | 2020-07-07 | New Dominion Enterprises Inc. | All-inorganic solvents for electrolytes |
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WO2015012625A1 (ko) | 2015-01-29 |
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