JP2005317551A - リチウム二次電池 - Google Patents
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Abstract
【解決手段】正極活物質を含む正極と負極活物質を含む負極と前記正極及び前記負極の間に位置するセパレータ;及び電解液とを含むリチウム二次電池であって、前記正極、前記負極、及び前記セパレータのうちの少なくとも一つは表面に分散コーティングされたアルカリ金属粉末層を含む。
【選択図】図1
Description
LiAO2
[化学式2]
LiMn2O4
[化学式3]
LiaNibBcMdO2(0.95≦a≦1.1、0≦b≦0.9、0≦c≦0.5、0.001≦d≦0.1)
[化学式4]
LiaNibBcMdO2 (0.95≦a≦1.1、0≦b≦0.9、0≦c≦0.5、0≦d≦0.5、0.001≦e≦0.1)
[化学式5]
LiaMn2MbO4(0.95≦a≦1.1、0.001≦b≦0.1)
[化学式6]
LiaMn2MbO4(0.95≦a≦1.1、0.001≦b≦0.1)
[化学式7]
DX2
[化学式8]
LiDS2
[化学式9]
V2O5
[化学式10]
LiV2O5
[化学式11]
LiEO2
[化学式12]
LiNiVO4
[化学式13]
Li(3−x)F2(PO4)3(0≦x≦3)
[化学式14]
Li(3−x)Fe2(PO4)3(0≦x≦2)
(前記化学式1乃至14中、AはCo、Ni、及びMnからなる群より少なくとも1種以上選択されるものであり、
BはCoまたはMnであり、
DはTi、Mo、またはMnであり、
EはCr、V、Fe、Sc、及びYからなる群より少なくとも1種以上選択されるものであり、
FはV、Cr、Mn、Co、Ni、及びCuからなる群より少なくとも1種以上選択されるものであり、
MはAl、Cr、Mn、Fe、Mg、La、Ce、Sr、及びVからなる群より選択される遷移金属及び/又はランタナイド金属のうちの一つ以上の金属であり、
XはOまたはSである)
また、前記硫黄系列化合物としては、Li2Sn(n≧1)、有機硫黄化合物、及び炭素硫黄ポリマー((C2Sx)n:x=2.5乃至50、n≧2)からなる群より選択される少なくとも1種以上のものを使用することができる。
LiCoO2正極活物質94質量%、スーパーP(M.M.M.社製)導電剤3質量%、及びフッ化ビニリデン樹脂バインダー3質量%をN−メチルピロリドン溶媒中で混合して正極活物質スラリーを製造した。この時、前記LiCoO2正極活物質は初期充電時に0.1C、4.3Vまで充電した時に160mAh/gの充電容量及び3.0Vまでの放電時に157mAh/gの放電容量を示す活物質である。
正極としては実施例1で製造された正極活物質組成物をAlホイル電流集電体にコーティングして製造したものを使用し、負極活物質スラリーをCuホイルにコーティングして負極活物質層を形成した後、リチウム金属組成物をコーティングし、110℃で乾燥して製造された負極を使用したことを除いては、前記実施例1と同一に実施した。
正極としては実施例1で製造された正極活物質組成物をAlホイル電流集電体にコーティングして製造したものを使用し、リチウム金属組成物を前記ポリエチレン高分子表面にコーティングし、60℃で乾燥してリチウム金属粉末層が形成されたセパレータを使用したことを除いては、前記実施例1と同一に実施した。この時、前記リチウム金属粉末層が正極表面に接するように位置させた。
正極としては実施例1で製造された正極活物質組成物をAlホイル電流集電体にコーティングして製造したものを使用し、リチウム金属組成物を前記ポリエチレン高分子表面にコーティングし、60℃で乾燥してリチウム金属粉末層が形成されたセパレータを使用したことを除いては、前記実施例1と同一に実施した。この時、前記リチウム金属粉末層が負極表面に接するように位置させた。
正極として実施例1で製造された正極活物質組成物をAlホイル電流集電体にコーティングして製造したものを使用したことを除いては、前記実施例1と同一に実施した。
2 負極
3 正極
4 セパレータ
5 電池容器
6 封入部材
Claims (17)
- 正極活物質を含む正極と、
負極活物質を含む負極と、
前記正極及び前記負極の間に位置するセパレータと、
電解液とを
含むリチウム二次電池であって、
前記正極、前記負極、及び前記セパレータのうちの少なくとも一つは表面に存在するアルカリ金属粉末層を含むことを特徴とする、リチウム二次電池。 - 前記アルカリ金属はLi、Na、及びKからなる群より選択される少なくとも1種であることを特徴とする、請求項1に記載のリチウム二次電池。
- 前記アルカリ金属はLiであることを特徴とする、請求項2に記載のリチウム二次電池。
- 前記アルカリ金属粉末層の厚さは30μm以下であることを特徴とする、請求項1に記載のリチウム二次電池。
- 前記アルカリ金属粉末層の厚さは20μm以下であることを特徴とする、請求項4に記載のリチウム二次電池。
- 前記アルカリ金属粉末層の厚さは10μm以下であることを特徴とする、請求項5に記載のリチウム二次電池。
- 前記アルカリ金属粉末層の厚さは5μm以下であることを特徴とする、請求項6に記載のリチウム二次電池用電極。
- 前記正極活物質はリチウム化挿入化合物、無機硫黄(S8)、及び硫黄系列化合物からなる群より選択される少なくとも1種であることを特徴とする、請求項1に記載のリチウム二次電池。
- 前記負極活物質は炭素系列物質、Si、Sn、酸化スズ、スズ合金複合体(composite tin alloys)、遷移金属酸化物、リチウム金属窒化物、及びリチウム金属酸化物からなる群より選択される少なくとも1種であることを特徴とする、請求項1に記載のリチウム二次電池。
- 前記アルカリ金属粉末層は、アルカリ金属組成物を高分子フィルムまたは活物質層が形成された電流集電体にコーティングする工程及び
前記コーティングされた高分子フィルムまたは電流集電体を乾燥する工程により形成されることを特徴とする請求項1に記載のリチウム二次電池。 - 前記アルカリ金属は平均粒子の大きさが1乃至100μmであることを特徴とする、請求項10に記載のリチウム二次電池。
- 前記アルカリ金属は平均粒子の大きさが5乃至50μmであることを特徴とする、請求項11に記載のリチウム二次電池。
- 前記アルカリ金属は平均粒子の大きさが10乃至20μmであることを特徴とする、請求項12に記載のリチウム二次電池。
- 前記コーティング工程はナイフコーティング、ダイレクトロールコーティング、リバースロールコーティング、グラビアロールコーティング、ギャップコーティング、スプレーコーティング、スロットダイコーティング、及びテープコーティング工程からなる群より選択される少なくとも1種であることを特徴とする、請求項10に記載のリチウム二次電池。
- 前記コーティングされるアルカリ金属組成物は溶媒100質量部に対して1乃至30質量部のアルカリ金属を前記溶媒に添加して製造されることを特徴とする、請求項10に記載のリチウム二次電池。
- 前記コーティングされるアルカリ金属組成物は溶媒100質量部に対して1乃至30質量部のアルカリ金属及び1乃至20質量部のバインダーを前記溶媒に添加して製造されることを特徴とする、請求項10に記載のリチウム二次電池。
- 前記乾燥工程の後に圧力を加える工程をさらに実施することを特徴とする、請求項10に記載のリチウム二次電池。
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KR1020040029968A KR100590096B1 (ko) | 2004-04-29 | 2004-04-29 | 리튬 이차 전지 |
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Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007109423A (ja) * | 2005-10-11 | 2007-04-26 | Matsushita Electric Ind Co Ltd | 非水電解質二次電池およびその負極の製造法 |
JP2007227361A (ja) * | 2006-01-27 | 2007-09-06 | Matsushita Electric Ind Co Ltd | リチウムイオン二次電池およびその充電システム |
JP2008084842A (ja) * | 2006-08-30 | 2008-04-10 | Shin Etsu Chem Co Ltd | 非水系二次電池用セパレータ及びその製造方法並びに非水電解質二次電池 |
WO2008044461A1 (fr) * | 2006-10-12 | 2008-04-17 | Panasonic Corporation | Accumulateur secondaire à électrolyte non aqueux et son procédé de production d'électrode négative |
JP2008098151A (ja) * | 2006-09-14 | 2008-04-24 | Shin Etsu Chem Co Ltd | 非水電解質二次電池及びその製造方法 |
JP2010538424A (ja) * | 2007-08-31 | 2010-12-09 | エフエムシー・コーポレイション | リチウムイオン用途のための安定化リチウム金属粉末、組成物および製造方法 |
WO2011021644A1 (ja) | 2009-08-19 | 2011-02-24 | 三菱化学株式会社 | 非水系電解液二次電池用セパレータ及び非水系電解液二次電池 |
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Also Published As
Publication number | Publication date |
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CN1694298A (zh) | 2005-11-09 |
CN1694300B (zh) | 2011-03-23 |
KR20050104625A (ko) | 2005-11-03 |
US20050244715A1 (en) | 2005-11-03 |
US8173303B2 (en) | 2012-05-08 |
KR100590096B1 (ko) | 2006-06-14 |
JP4330551B2 (ja) | 2009-09-16 |
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