JP2013011017A - 単層および多層グラフェンとその作製方法、単層および多層グラフェンを有する物体あるいは電気機器 - Google Patents
単層および多層グラフェンとその作製方法、単層および多層グラフェンを有する物体あるいは電気機器 Download PDFInfo
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 228
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 215
- 238000004519 manufacturing process Methods 0.000 title claims description 6
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910001416 lithium ion Inorganic materials 0.000 claims abstract description 16
- 239000012298 atmosphere Substances 0.000 claims abstract description 9
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- 238000003860 storage Methods 0.000 abstract description 49
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- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 6
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- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
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- KLARSDUHONHPRF-UHFFFAOYSA-N [Li].[Mn] Chemical compound [Li].[Mn] KLARSDUHONHPRF-UHFFFAOYSA-N 0.000 description 1
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- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- ILXAVRFGLBYNEJ-UHFFFAOYSA-K lithium;manganese(2+);phosphate Chemical compound [Li+].[Mn+2].[O-]P([O-])([O-])=O ILXAVRFGLBYNEJ-UHFFFAOYSA-K 0.000 description 1
- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 1
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- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
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Abstract
【解決手段】酸化グラフェン溶液102中に、物体103を浸漬した後、引き上げ乾燥させる、あるいは、物体と電極104を浸漬し、前記物体を陽極として前記電極間に電圧を加える。酸化グラフェンは負に帯電するので、陽極に引き寄せられ、物体の表面に実質的に均一な厚さで付着する。その後、物体を真空中あるいは還元性雰囲気中で加熱することで、酸化グラフェンを還元し、グラフェンとする。以上により、凹凸のある物体の表面にも実質的に均一な厚さのグラフェンの層を形成できる。例えば、ウィスカ状のシリコン表面にもグラフェンの層を形成でき、リチウムイオン二次電池等の蓄電装置にも利用できる。
【選択図】図1
Description
本実施の形態では、物体にグラフェンを形成する方法について説明する。酸化グラフェンは、グラファイトを酸化して、酸化グラファイトを作製し、これに超音波振動を加えることで得られる。詳細は特許文献3を参照すればよい。また、市販の酸化グラフェンを利用してもよい。
本実施の形態では、リチウムイオン二次電池の負極集電体の一表面に形成されたシリコンのウィスカの表面に1層乃至50層のグラフェンを形成する例について説明する。本実施の形態では、浸漬法を用いてグラフェンを形成する。
本実施の形態では、集電体上に形成されたウィスカの表面に1層乃至50層のグラフェンよりなるグラフェンの層を形成する別の例について説明する。本実施の形態では、電気泳動法を用いてグラフェンを形成する。実施の形態2と同様に、酸化グラフェンを水やNMP等の溶媒に分散させる。酸化グラフェンの濃度は1リットル当たり0.1g乃至10gとすればよい。
本発明の一態様に係る蓄電装置は、例えば、電気自動車、電動工具、パーソナルコンピュータ、携帯電話等で使用できる。これらの電気機器は、有線で電源を供給されるとは限らないため、内部に充電池を有する。その充電池の負極の活物質として、例えば、実施の形態2乃至実施の形態3で示した1層乃至50層のグラフェンで表面が覆われたシリコンを用いればよい。
102 溶液
103 物体
104 導電体
201 集電体
202 ウィスカ
203 グラフェンの層
204 空孔
301 負極集電体
302 負極活物質層
303 陰極
304 筐体
305 セパレータ
306 リング状絶縁体
307 正極集電体
308 正極活物質層
309 陽極
310 スペーサー
311 ワッシャー
312 筐体
401 表示装置
402 筐体
403 表示部
404 スピーカー部
405 蓄電装置
411 照明装置
412 筐体
413 光源
414 蓄電装置
415 天井
416 側壁
417 床
418 窓
421 室内機
422 筐体
423 送風口
424 蓄電装置
425 室外機
431 電気冷凍冷蔵庫
432 筐体
433 冷蔵室用扉
434 冷凍室用扉
435 蓄電装置
Claims (11)
- 表面に1層乃至100層のグラフェンを有する凹凸を有する物体。
- ウィスカを有することを特徴とする請求項1記載の物体。
- 前記グラフェンに含まれる炭素と水素以外の元素の濃度は15原子%以下であることを特徴とする請求項1もしくは請求項2記載の物体。
- リチウムイオン二次電池の電極に用いられる請求項1乃至請求3のいずれかに記載の物体。
- 酸化グラフェンを分散させた溶液中に、物体と電極を浸漬し、前記物体と前記電極間に電圧を加える工程と、
前記物体を真空中あるいは還元性雰囲気中で加熱する工程と
を有する1層乃至100層のグラフェンの作製方法。 - ウィスカと、ウィスカの表面に形成された1層乃至100層のグラフェンよりなる複数のグラフェンの層とを有する物体を陰極として有し、前記グラフェンの層の各々は少なくとも1つの空孔を有することを特徴とする電気機器。
- 前記グラフェンの層は酸化グラフェンをその表面に形成した後、これを還元して得られたことを特徴とする請求項6記載の電気機器。
- 前記グラフェンの層に含まれる酸素の濃度は5原子%以上15原子%以下であることを特徴とする請求項6もしくは請求項7記載の電気機器。
- 前記グラフェンの層の上に前記グラフェンの層とは異なる材料の層が設けられたことを特徴とする請求項6乃至請求項8記載の電気機器。
- 酸化グラフェンを分散させた溶液中に、ウィスカを有する負極集電体を浸漬する工程と、
前記ウィスカを有する負極集電体を溶液から引き上げる工程と、
前記ウィスカを有する負極集電体を真空中あるいは還元性雰囲気中で加熱する工程と
を有する電気機器の作製方法。 - 酸化グラフェンを分散させた溶液中に、ウィスカを有する負極集電体と電極を浸漬し、前記ウィスカを有する負極集電体と前記電極間に電圧を加える工程と、
前記ウィスカを有する負極集電体を真空中あるいは還元性雰囲気中で加熱する工程と
を有する電気機器の作製方法。
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JP6634101B2 (ja) | 2020-01-22 |
KR102188467B1 (ko) | 2020-12-08 |
TWI542539B (zh) | 2016-07-21 |
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TWI582041B (zh) | 2017-05-11 |
JP2018063957A (ja) | 2018-04-19 |
TW201311554A (zh) | 2013-03-16 |
JP6280938B2 (ja) | 2018-02-14 |
CN102810671B (zh) | 2017-07-14 |
JP2019050221A (ja) | 2019-03-28 |
JP2016106364A (ja) | 2016-06-16 |
JP5879000B2 (ja) | 2016-03-08 |
JP2022016584A (ja) | 2022-01-21 |
CN102810671A (zh) | 2012-12-05 |
KR102473792B1 (ko) | 2022-12-06 |
KR20190137054A (ko) | 2019-12-10 |
KR20120135081A (ko) | 2012-12-12 |
KR20200138130A (ko) | 2020-12-09 |
KR102054646B1 (ko) | 2019-12-11 |
TWI643814B (zh) | 2018-12-11 |
KR20220166228A (ko) | 2022-12-16 |
US10644315B2 (en) | 2020-05-05 |
JP7358439B2 (ja) | 2023-10-10 |
TW201630808A (zh) | 2016-09-01 |
KR102305071B1 (ko) | 2021-09-28 |
TW201726546A (zh) | 2017-08-01 |
JP2016021400A (ja) | 2016-02-04 |
US20120308884A1 (en) | 2012-12-06 |
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