JP2015520926A - リチウム電池用負極 - Google Patents
リチウム電池用負極 Download PDFInfo
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Abstract
Description
実施例1
純粋グラファイト(純度99.999%、+100メッシュ、Sigma−Aldrich社製)10gを、硫酸(97%、Sigma−Aldrich社製)150mLと混合した。前記混合物を24時間撹拌した後、前記混合物に、KMnO4 31.5gを入れ、前記混合物を酸化させた。前記酸化された混合物を、H2O2(50%、Sigma−Aldrich社製)35mLと混合し、K+、Mn2O、O3及び[O]−の残留物を除去した後、残留物が除去された混合物を4,000rpmで30分間遠心分離し、溶液中に浮かんでいる小粒子を除去し、沈澱された粒子を回収し、真空下で80℃で24時間乾燥させて酸化グラフェンを製造した。
前記実施例1で製造された酸化グラフェン0.1gをpH9の水400mLに、超音波分散機を利用して分散させ、酸化グラフェン溶液を製造した。前記分散された酸化グラフェン溶液400mLと、還元剤であるN2H4 4mLとを混合した後、800Wのマイクロウエーブ(microwave)で60分間加熱し、酸化グラフェンを還元させた。その後、前記溶液を4,000rpmで30分間遠心分離し、還元された酸化グラフェンを分離させ、メタノール50mLと水50mLとで洗浄した後、さらに4,000rpmで30分間遠心分離し、常温で乾燥させ、還元された酸化グラフェンを製造した。
前記実施例1で製造された酸化グラフェン0.1gに、N−メチルピロリドン溶媒内に、5重量%のポリフッ化ビニリデン(PVdF)が含まれた溶液0.5gを入れ、乳鉢で混合して酸化グラフェン−ポリフッ化ビニリデン溶液を製造した。
前記実施例2で製造された還元された酸化グラフェン0.1gに、N−メチルピロリドン溶媒内に、5重量%のポリフッ化ビニリデンが含まれた溶液0.5gを入れ、乳鉢で混合して還元された酸化グラフェン−ポリフッ化ビニリデン溶液を製造した。
実施例5
リチウム金属層の表面上に、前記実施例3で製造された酸化グラフェン−ポリフッ化ビニリデン溶液0.04mLを均一に落とし、ドロップコーティング(drop coating)した後、60℃の真空オーブンで乾燥させ、リチウム金属層の表面上に、リチウム金属層1cm2当たり酸化グラフェン−ポリフッ化ビニリデンの保護層が3.27mgである負極を準備した。そこに、対電極としてリチウム金属電極、厚み0.52mmのポリ酸化プロピレン材質のセパレータ(Tonen社製造)、並びに電解質(エチレンカーボネート(EC)及びジエチルカーボネート(DEC)(EM:DECの体積比=3:7)の混合物+1.0MのLiPF6)を組み立て、コイン型ハーフセル(coin half-cell)を製作した。
前記実施例3で製造された酸化グラフェン−ポリフッ化ビニリデン溶液の代わりに、実施例4で製造された還元された酸化グラフェン−ポリフッ化ビニリデン溶液を使用して、リチウム金属層の表面上に、リチウム金属層1cm2当たり還元された酸化グラフェン−ポリフッ化ビニリデンの保護層が3.17mgである負極を準備したことを除いては、前記実施例5と同一の方法でコイン型ハーフセルを製作した。
リチウム金属層だけで負極を準備したことを除いては、前記実施例5と同一の方法でコイン型ハーフセルを製作した。
リチウム金属層の表面上に、前記実施例3で製造された酸化グラフェン−ポリフッ化ビニリデン溶液0.04mLの代わりに、カーボンブラック−ポリフッ化ビニリデン溶液0.03mLを使用して、リチウム金属層の表面上に、リチウム金属層1cm2当たりカーボンブラック−ポリフッ化ビニリデンの保護層が3.2mgである負極を準備したことを除いては、前記実施例5と同一の方法でコイン型ハーフセルを製作した。
評価例1:リチウム電池の充放電容量に係わる電圧測定
前記実施例5,6及び比較例1,2で製造されたコイン型ハーフセルの容量に係わる電圧のプロファイルを、−0.2Vないし0.4Vの電圧範囲で、1回サイクル当たり0.177mA×10hでそれぞれ10回サイクルを進めて測定した。その結果を、図3Aないし図3Dに示した。
11 正極
12 負極
12b 炭素材層
14 電池カン
110 リチウム空気電池
112 第1集電体
113 負極
114 第2集電体
115 正極
116 リチウムイオン伝導性固体電解質膜
117 金属層
118 電解質
119 炭素材層
Claims (20)
- リチウムを含む金属層と、
前記金属層上に配置され、平板構造を有する炭素材を含む板状の炭素材層と、を含む負極。 - 前記板状の炭素材層が、平板フィルム状であることを特徴とする請求項1に記載の負極。
- 前記炭素材層が、前記金属層形状に対応する形状を有することを特徴とする請求項1又は2に記載の負極。
- 前記炭素材層が、前記金属層でエピタキシされたことを特徴とする請求項1から3の何れか1項に記載の負極。
- 前記炭素材が結晶質構造を有することを特徴とする請求項1から4の何れか1項に記載の負極。
- 前記炭素材が、複数個の共有結合した炭素原子を含む多環芳香族分子を含むことを特徴とする請求項1から5の何れか1項に記載の負極。
- 前記炭素材がグラフェン、酸化グラフェン(GO)、還元された酸化グラフェン(rGO)、ナノサイズのグラフェン板(NGP)及び官能基化グラフェンから選択された一種以上を含むことを特徴とする請求項1から6の何れか1項に記載の負極。
- 前記炭素材層が炭素1ないし300層の単層構造体を含むことを特徴とする請求項1から7の何れか1項に記載の負極。
- 前記炭素材層が剥離された層または成長された層であることを特徴とする請求項1から8の何れか1項に記載の負極。
- 前記炭素材層が剥離された単層であることを特徴とする請求項1から9の何れか1項に記載の負極。
- 前記炭素材層が、基板上にグラファイト化触媒を利用して、化学蒸気蒸着法(CVD)によって成長された2層以上を含むことを特徴とする請求項1から10の何れか1項に記載の負極。
- 前記炭素材層が、1nmないし10nmほどの厚みを有する膜であることを特徴とする請求項1から11の何れか1項に記載の負極。
- 前記炭素材層が、25m2/gないし500m2/gほどの比表面積を有することを特徴とする請求項1から12の何れか1項に記載の負極。
- 前記炭素材層が、有機バインダを追加して含むことを特徴とする請求項1から13の何れか1項に記載の負極。
- 前記炭素材層のバインダの含量が、炭素材層の炭素材100重量部に対して、5重量部ないし50重量部ほどであることを特徴とする請求項14に記載の負極。
- 前記リチウムを含む金属層が、リチウム金属、及びリチウムと合金可能な金属から選択された一種以上を含むことを特徴とする請求項1から15の何れか1項に記載の負極。
- 前記リチウムと合金可能な金属が、Si、In、Pb、Ga、Ge、Sn、Al、Bi及びSbから選択された一種以上を含むことを特徴とする請求項16に記載の含む負極。
- 正極と、
電解質と、
負極と、を含み、
前記負極は、リチウムを含む金属層、及び前記金属層上に配置されて平板構造を有する炭素材を含む板状の炭素材層を含むリチウム電池。 - 前記板状の炭素材層が、前記正極と前記負極との間に配置されたセパレータに対向する負極面の上に配置されたことを特徴とする請求項18に記載のリチウム電池。
- 前記リチウム電池が、リチウム二次電池であることを特徴とする請求項18又は19に記載のリチウム電池。
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Application Number | Priority Date | Filing Date | Title |
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KR10-2012-0052204 | 2012-05-16 | ||
KR1020120052204A KR101920714B1 (ko) | 2012-05-16 | 2012-05-16 | 리튬 전지용 음극 및 이를 포함하는 리튬 전지 |
PCT/KR2013/004289 WO2013172646A1 (en) | 2012-05-16 | 2013-05-15 | Negative electrode for lithium battery |
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JP2015520926A true JP2015520926A (ja) | 2015-07-23 |
JP6340363B2 JP6340363B2 (ja) | 2018-06-06 |
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US (1) | US9391329B2 (ja) |
EP (1) | EP2850677B1 (ja) |
JP (1) | JP6340363B2 (ja) |
KR (1) | KR101920714B1 (ja) |
CN (1) | CN104541389B (ja) |
WO (1) | WO2013172646A1 (ja) |
Cited By (5)
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JP2018535516A (ja) * | 2016-01-19 | 2018-11-29 | エルジー・ケム・リミテッド | 電極組立体及びその製造方法 |
JP2019036391A (ja) * | 2017-08-10 | 2019-03-07 | トヨタ自動車株式会社 | 全固体電池および負極 |
WO2019112167A1 (ko) * | 2017-12-04 | 2019-06-13 | 삼성에스디아이 주식회사 | 리튬금속전지용 음극 및 이를 포함한 리튬금속전지 |
KR20190074999A (ko) * | 2017-12-20 | 2019-06-28 | 주식회사 엘지화학 | 리튬이차전지용 음극, 이의 제조방법 및 이를 포함한 리튬이차전지 |
JP2021170541A (ja) * | 2015-07-03 | 2021-10-28 | 株式会社半導体エネルギー研究所 | リチウムイオン蓄電池 |
Families Citing this family (57)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101920714B1 (ko) | 2018-11-21 |
EP2850677B1 (en) | 2017-10-04 |
WO2013172646A1 (en) | 2013-11-21 |
CN104541389B (zh) | 2018-06-15 |
EP2850677A1 (en) | 2015-03-25 |
JP6340363B2 (ja) | 2018-06-06 |
US9391329B2 (en) | 2016-07-12 |
EP2850677A4 (en) | 2016-02-17 |
US20130309571A1 (en) | 2013-11-21 |
CN104541389A (zh) | 2015-04-22 |
KR20130128273A (ko) | 2013-11-26 |
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