JPWO2016195062A1 - 非水電解液一次電池およびその製造方法 - Google Patents
非水電解液一次電池およびその製造方法 Download PDFInfo
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- JPWO2016195062A1 JPWO2016195062A1 JP2016556340A JP2016556340A JPWO2016195062A1 JP WO2016195062 A1 JPWO2016195062 A1 JP WO2016195062A1 JP 2016556340 A JP2016556340 A JP 2016556340A JP 2016556340 A JP2016556340 A JP 2016556340A JP WO2016195062 A1 JPWO2016195062 A1 JP WO2016195062A1
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- Prior art keywords
- aqueous electrolyte
- battery
- primary battery
- lib
- lithium
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-
- H—ELECTRICITY
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Abstract
Description
<正極の作製>
正極活物質である二酸化マンガンと、導電助剤であるカーボンブラックと、バインダであるPTFEとを、93:3:4の質量比で混合して調製した正極合剤を成形して、直径16mm、厚み1.8mmの正極(正極合剤成形体)を得た。
厚みが0.6mmのリチウム箔の片面に、厚みが0.01μmのアルミニウム箔を圧着し、これを直径16mmの円形に打ち抜いて、負極用積層体を得た。
PCとDMEとを、体積比1:1で混合した混合溶媒に、LiClO4を0.5mol/lの濃度で溶解させ、更に1質量%となる量のLiB(C2O4)2を添加して、非水電解液を調製した。LiClO4とLiB(C2O4)2との総量中、LiB(C2O4)2の割合は10mol%であった。
前記の正極と負極用積層体と非水電解液とを使用し、セパレータにPPS製の不織布(厚み170μm)を使用して、図1に示す構造で、直径20mm、高さ3.2mmの非水電解液一次電池を組み立てた。
LiB(C2O4)2の添加量を5質量%とした以外は実施例1と同様にして非水電解液を調製し、この非水電解液を用いた以外は実施例1と同様にして非水電解液一次電池を作製した。LiClO4とLiB(C2O4)2との総量中、LiB(C2O4)2の割合は36mol%であった。
LiB(C2O4)2に代えて1,3−プロパンスルトン(PS)を2質量%となる量で添加した以外は実施例1と同様にして非水電解液を調製し、この非水電解液を用いた以外は実施例1と同様にして非水電解液一次電池を作製した。
実施例1、実施例2および比較例1の非水電解液一次電池について、15kΩの抵抗を接続して、正極容量に対する放電深度が60%になるまで放電を行った。放電後の各電池を120℃に調整した恒温槽内に入れ、表1に示す時間ごとに各電池の高さを測定し、電池製造直後の高さ(3.2mm)からの変化量(電池膨れ量)を求めた。
実施例1、実施例2および比較例1の非水電解液一次電池について、下記の条件で、放電深度が60%の電池に対する高温貯蔵後の電池特性の評価を行った。
LiB(C2O4)2の添加量を0.5質量%とした以外は実施例1と同様にして非水電解液を調製し、この非水電解液を用いた以外は実施例1と同様にして非水電解液一次電池を作製した。LiClO4とLiB(C2O4)2との総量中、LiB(C2O4)2の割合は6mol%であった。
LiB(C2O4)2の添加量を2質量%とした以外は実施例1と同様にして非水電解液を調製し、この非水電解液を用いた以外は実施例1と同様にして非水電解液一次電池を作製した。LiClO4とLiB(C2O4)2との総量中、LiB(C2O4)2の割合は18mol%であった。
LiB(C2O4)2の添加量を3質量%とした以外は実施例1と同様にして非水電解液を調製し、この非水電解液を用いた以外は実施例1と同様にして非水電解液一次電池を作製した。LiClO4とLiB(C2O4)2との総量中、LiB(C2O4)2の割合は25mol%であった。
実施例1および実施例3〜5の非水電解液一次電池について、下記の条件で、−10℃での放電特性の評価を行った。
2 正極
3 負極
4 セパレータ
5 外装缶
6 封口板
7 絶縁ガスケット
Claims (6)
- 金属リチウムまたはリチウム合金を有する負極、正極、セパレータおよび非水電解液を有する非水電解液一次電池であって、
前記非水電解液は、少なくともLiClO4を電解質として含有し、かつ、LiB(C2O4)2を0.1〜5質量%含有することを特徴とする非水電解液一次電池。 - 前記非水電解液中のLiClO4の含有量が、0.3〜1mol/lである請求項1に記載の非水電解液一次電池。
- 前記非水電解液におけるLiClO4とLiB(C2O4)2との総量中、LiB(C2O4)2の割合が3〜20mol%である請求項1または2に記載の非水電解液一次電池。
- 金属リチウムまたはリチウム合金を有する負極、正極、セパレータおよび非水電解液を外装体内部に収容する非水電解液一次電池の製造方法であって、
電解質として少なくともLiClO4を含有し、かつ、LiB(C2O4)2を0.1〜5質量%含有する非水電解液を用いることを特徴とする非水電解液一次電池の製造方法。 - 前記非水電解液中のLiClO4の含有量が、0.3〜1mol/lである請求項4に記載の非水電解液一次電池の製造方法。
- 前記非水電解液におけるLiClO4とLiB(C2O4)2との総量中、LiB(C2O4)2の割合が3〜20mol%である請求項4または5に記載の非水電解液一次電池の製造方法。
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