JP2015513763A - リチウム二次電池用電極の製造方法及びそれを用いて製造される電極 - Google Patents
リチウム二次電池用電極の製造方法及びそれを用いて製造される電極 Download PDFInfo
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- JP2015513763A JP2015513763A JP2014558692A JP2014558692A JP2015513763A JP 2015513763 A JP2015513763 A JP 2015513763A JP 2014558692 A JP2014558692 A JP 2014558692A JP 2014558692 A JP2014558692 A JP 2014558692A JP 2015513763 A JP2015513763 A JP 2015513763A
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Abstract
Description
アルミニウム集電体上の表面に0.5μmの大きさの表面粗さ(Ra)が形成されるように、2.4MのHCl水溶液にFeCl3を0.4Mの最終濃度で混合したエッチング液を用いて、アルミニウム集電体の表面をエッチングした。その後、Li1.33Ti1.67O4(負極活物質)95重量%、Super−P(導電材)2.5重量%及びPVdF(結合剤)2.5重量%をNMPに添加して負極合剤を製造し、上記で製造されたアルミニウム集電体に塗布することで、二次電池用負極を製造した。
エッチング液を用いてアルミニウム集電体の表面を処理していないこと以外は、実施例1と同様の方法で二次電池用負極を製造した。
上記実施例1及び比較例1における集電体の表面のSEM(Scanning Electron Microscopy)写真を、図1及び図2にそれぞれ示した。
上記実施例1及び比較例1で製造された負極の接着力を測定して、下記表1に示す。
Claims (17)
- 電極活物質が集電体に塗布されている二次電池用電極の製造方法であって、表面全般にわたって0.001〜10μmの大きさの表面粗さ(Ra)を形成するモルフォロジーを有するように集電体を表面処理する過程を含み、前記表面処理は、湿式法による化学的または電気的エッチングや、乾式法による反応性ガスまたはイオンエッチングにより行われて、電極活物質と集電体との接着力を改善させることを特徴とする、二次電池用電極の製造方法。
- 前記集電体は、表面全般にわたって0.1〜1μmの大きさの表面粗さ(Ra)を形成するモルフォロジーを有することを特徴とする、請求項1に記載の二次電池用電極の製造方法。
- 前記化学的エッチングは、エッチング剤としてFeCl3/HCl/H2Oの混合物を使用することを特徴とする、請求項1に記載の二次電池用電極の製造方法。
- 請求項1に記載の製造方法で製造されることを特徴とする、二次電池用電極。
- 前記電極は、正極若しくは負極、又は正極及び負極であることを特徴とする、請求項4に記載の二次電池用電極。
- 前記正極は、正極活物質として、下記化学式1で表されるリチウム金属酸化物を含む、請求項5に記載の二次電池用電極:
LixMyMn2−yO4−zAz (化学式1)
上記式中、0.9≦x≦1.2、0<y<2、0≦z<0.2であり、
Mは、Al、Mg、Ni、Co、Fe、Cr、V、Ti、Cu、B、Ca、Zn、Zr、Nb、Mo、Sr、Sb、W、Ti及びBiからなる群から選択される一つ以上の元素であり、
Aは、−1または−2価の一つ以上のアニオンである。 - 前記化学式1の酸化物は、下記化学式2で表されることを特徴とする、請求項6に記載の二次電池用電極:
LixNiyMn2−yO4 (化学式2)
上記式中、0.9≦x≦1.2、0.4≦y≦0.5である。 - 前記酸化物は、LiNi0.5Mn1.5O4またはLiNi0.4Mn1.6O4であることを特徴とする、請求項7に記載の二次電池用電極。
- 前記負極は、負極活物質として、下記化学式3で表されるリチウム金属酸化物を含む、請求項5に記載の二次電池用電極:
LiaM’bO4−cAc (化学式3)
上記式中、M’は、Ti、Sn、Cu、Pb、Sb、Zn、Fe、In、Al及びZrからなる群から選択される一つ以上の元素であり、
a及びbは、0.1≦a≦4、0.2≦b≦4の範囲でM’の酸化数によって決定され、
cは、0≦c<0.2の範囲でAの酸化数によって決定され、
Aは、−1または−2価の一つ以上のアニオンである。 - 前記リチウム金属酸化物は、下記化学式4で表されることを特徴とする、請求項9に記載の二次電池用電極:
LiaTibO4 (化学式4)
上記式中、0.5≦a≦3、1≦b≦2.5である。 - 前記リチウム金属酸化物は、Li1.33Ti1.67O4またはLiTi2O4であることを特徴とする、請求項10に記載の二次電池用電極。
- 請求項4乃至11のいずれか1項に記載の二次電池用電極を含むことを特徴とする、二次電池。
- 前記二次電池はリチウム二次電池であることを特徴とする、請求項12に記載の二次電池。
- 請求項13に記載の二次電池を単位電池として含むことを特徴とする、電池モジュール。
- 請求項14に記載の電池モジュールを含むことを特徴とする、電池パック。
- 請求項15に記載の電池パックを含むことを特徴とする、デバイス。
- 前記デバイスは、電気自動車、ハイブリッド電気自動車、プラグインハイブリッド電気自動車、または電力貯蔵用システムであることを特徴とする、請求項16に記載のデバイス。
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CN104137307A (zh) | 2014-11-05 |
JP5860174B2 (ja) | 2016-02-16 |
KR20130116827A (ko) | 2013-10-24 |
US20140349171A1 (en) | 2014-11-27 |
EP2802031A1 (en) | 2014-11-12 |
KR101603082B1 (ko) | 2016-03-14 |
US10026952B2 (en) | 2018-07-17 |
EP2802031A4 (en) | 2016-02-10 |
CN104137307B (zh) | 2017-09-22 |
EP2802031B1 (en) | 2017-05-31 |
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