JP6857731B2 - 紙集電体、その製造方法およびこれを含む電気化学素子 - Google Patents
紙集電体、その製造方法およびこれを含む電気化学素子 Download PDFInfo
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
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- H01M4/64—Carriers or collectors
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- H01M4/665—Composites
- H01M4/667—Composites in the form of layers, e.g. coatings
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- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0015—Electro-spinning characterised by the initial state of the material
- D01D5/003—Electro-spinning characterised by the initial state of the material the material being a polymer solution or dispersion
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Description
セルロース(cellulose)繊維を水に入れて得たセルロース0.5%濃度懸濁液を20分間撹拌機で撹拌した後、20,000psi圧力のホモジナイザー(homogenizer)を利用して50〜200μm直径のノズルにそれぞれ20回通過させて、繊維の直径が10〜100nm大きさのナノセルロース繊維が分散された分散液を製造した。
製造例1で製造された分散液を電気放射機の連続電気放射ノズルに装着させ、電気放射してナノセルロース紙を製造した。この時、印加電圧は20±1kVに調節したし、放射液を20ml/hrの放射速度で単位面積(1cm2)当たり1mlずつ放射した。次に1重量%の銀ナノワイヤー(Ag nanowire)が分散されたイソプロピルアルコール溶液を連続電気放射ノズルに装着して製造されたナノセルロース紙の上に電気放射して紙集電体を製造した。この時、印加電圧は15±1kVに調節したし、放射液を20ml/hrの放射速度で単位面積(1cm2)当たり0.5mlずつ放射したし、紙集電体に含まれた銀ナノワイヤー層の含量はナノセルロース紙100重量部基準10±5重量部となるように調節した。
製造例1で製造された分散液を使って実施例1で製造されたのと同じ方法でナノセルロース紙を製造した。その後、二重電気放射機の第1ノズルに1重量%の銀ナノワイヤー(Ag nanowire)が分散されたイソプロピルアルコール溶液を注入し、第2ノズルには0.01重量%のカーボンナノチューブが分散された水溶液を注入した後、前記にて準備されたナノセルロース紙の上に二重電気放射して、第1導電材を含む第1導電層と第2導電材を含む第2導電層が順次積層された紙集電体を製造した。この時、第1および第2ノズルでの印加電圧はそれぞれ15±1kVおよび18±1kVに調節したし、放射速度はそれぞれ20±1ml/hrおよび10±1ml/hrであり、単位面積(1cm2)当たり放射量はそれぞれ0.5mlに制御された。また、紙集電体に含まれた第1および第2導電層の含量はナノセルロース紙100重量部基準20±10重量部となるように調節した。
セルロース(cellulose)繊維を蒸溜水に添加して得た0.5重量%のセルロース懸濁液を20分間撹拌機で撹拌し、20,000psi圧力のホモジナイザー(homogenizer)を利用して50〜200μm直径のノズルにそれぞれ20回通過させて、直径10〜100nmのナノセルロース繊維が分散された分散液を製造した。その後、前記分散液に1重量%の銀ナノワイヤー(Ag nanowire)が分散されたイソプロピルアルコール溶液を混合し、このようにして得た混合溶液の溶媒を揮発させてナノセルロース繊維と導電材を含む集電体を製造した。この時、集電体に含まれた銀ナノワイヤー層の含量はナノセルロース100重量部基準20±10重量部となるように調節した。
本発明に係る紙集電体の性能を評価するために、下記のような実験を遂行した。
実施例1および2と比較例1で製造された集電体を対象に走査電子顕微鏡(SEM)分析を遂行した。この時、加速電圧は15kVであり、測定された結果は図3に示した。
絶縁抵抗測定機を利用して実施例1および2と比較例1で製造された紙集電体(横3cmおよび縦2cm)を対象に絶縁抵抗を測定した。
赤外線−可視光線分光分析器(UV−Vis spectrophotometer)を利用して実施例1および2と比較例1で製造された紙集電体(横3cmおよび縦2cm)を対象に550nm波長を有する光に対する透過度を測定したし、その結果を図6に示した。
本発明に係る集電体の機械的柔軟性を確認するために、まず実施例2で製造された集電体の初期抵抗を測定し、0〜20mmの直径を有するアクリル棒に巻いた後の抵抗を測定して抵抗値の変化を観察した。
本発明により紙集電体を含む電極および前記電極を含む電池の性能を評価するために,前記電極を含むコイン形リチウム二次電池を製造した。
Claims (13)
- ナノセルロース繊維を含む繊維層;および
前記繊維層上に形成され、1種以上の導電材を含む導電層を含み、
前記導電材はナノセルロース繊維100重量部に対して5〜1,000重量部であり、
前記ナノセルロース繊維の直径は10nm〜100nmであることを特徴とする、紙集電体。 - 紙集電体は、
ナノセルロース繊維を含む繊維層;
第1導電材を含む第1導電層;および
第2導電材を含む第2導電層;を含む構造であることを特徴とする、請求項1に記載の紙集電体。 - ナノセルロース繊維は水酸化基(hydroxyl group)、アセチル基(acetyl group)、シラン基(silane group)およびアクリル基(acryl group)からなる群から選択される1種以上の作用基で改質されたことを特徴とする、請求項1に記載の紙集電体。
- ナノセルロース繊維は植物性セルロース繊維を含む紙であることを特徴とする、請求項1に記載の紙集電体。
- 導電材は、
炭素繊維、グラフェン、炭素ナノチューブ、炭素ナノ繊維および炭素リボンのうち1種以上の炭素系物質;
銅、銀、ニッケルおよびアルミニウムのうち1種以上の金属;および
ポリフェニレンおよびポリフェニレン誘導体のうち1種以上の導電性ポリマー、からなる群から選択される1種以上を含む、請求項1に記載の紙集電体。 - 導電材は平均直径が10nm〜100μmであり、
導電材の平均直径(D)に対する平均長さ(L)の比率(L/D)が平均50以上であることを特徴とする、請求項1に記載の紙集電体。 - 紙集電体は550nm波長での光透過度が50%〜99%であることを特徴とする、請求項1に記載の紙集電体。
- ナノセルロース繊維を含む繊維層上に1種以上の導電材を含む放射液を電気放射する段階を含む、請求項1に記載の紙集電体の製造方法。
- 電気放射は連続電気放射(sequential electrospinning)または二重電気放射(dual electrospinning)であることを特徴とする、請求項8に記載の紙集電体の製造方法。
- 電気放射速度は0.1ml/h〜100ml/hであることを特徴とする、請求項8に記載の紙集電体の製造方法。
- 放射液の使用量は単位面積(1cm2)当たり0.01ml〜10mlであることを特徴とする、請求項8に記載の紙集電体の製造方法。
- 請求項1に記載された紙集電体;および電極活物質を含む、電極。
- 請求項12に記載された電極を含む、電気化学素子。
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JP6818669B2 (ja) * | 2017-09-25 | 2021-01-20 | 株式会社東芝 | 電界紡糸装置 |
KR102051212B1 (ko) * | 2018-04-11 | 2019-12-03 | 울산과학기술원 | 리튬-황 전지용 종이 전극 및 이를 포함하는 리튬-황 전지 |
CN109294235A (zh) * | 2018-09-30 | 2019-02-01 | 西南大学 | 一种具有双网络结构的柔性高频电磁屏蔽材料及其制备方法 |
KR102355101B1 (ko) | 2018-10-18 | 2022-02-04 | 주식회사 엘지에너지솔루션 | 삼차원 구조 전극 및 이를 포함하는 전기화학소자 |
KR102209975B1 (ko) * | 2019-03-13 | 2021-02-01 | 경희대학교 산학협력단 | 에너지 저장 전극, 이를 이용하는 에너지 저장 장치, 이를 기반으로 하는 에너지 저장 시스템 및 이의 제작 방법 |
CN110581278B (zh) * | 2019-09-24 | 2021-04-27 | 浙江农林大学 | 柔性锂离子电池用正极材料及其制备方法、应用以及柔性锂离子电池 |
CN111430722A (zh) * | 2020-04-07 | 2020-07-17 | 武汉兰钧新能源科技有限公司 | 一种纸质集流体、其制备方法、电极及电池 |
CN114188547B (zh) * | 2021-12-20 | 2024-04-09 | 上海电气国轩新能源科技有限公司 | 一种骨料材料、非金属集流体及其制备方法、应用 |
CN114628687B (zh) * | 2022-03-21 | 2024-06-28 | 中国科学技术大学 | 一种梯度导电性集流体材料、其制备方法、负极及电池 |
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KR101079918B1 (ko) * | 2008-10-27 | 2011-11-04 | 경북대학교 산학협력단 | 다중벽 카본나노튜브/셀룰로오스의 복합체 및 그 제조방법 |
US9138965B2 (en) * | 2009-10-30 | 2015-09-22 | The Board Of Trustees Of The Leland Stanford Junior University | Conductive fibrous materials |
KR101806547B1 (ko) * | 2011-04-06 | 2018-01-10 | 주식회사 제낙스 | 금속 섬유를 포함하는 전극 구조체를 갖는 전지 및 상기 전극 구조의 제조 방법 |
WO2013003846A2 (en) * | 2011-06-30 | 2013-01-03 | The Regents Of The University Of California | Surface insulated porous current collectors as dendrite free electrodeposition electrodes |
US9531010B2 (en) * | 2012-12-14 | 2016-12-27 | Indiana University Research And Technology Corporation | Paper-based lithium-ion batteries |
US10158116B2 (en) * | 2013-01-25 | 2018-12-18 | Arkema France | Method for manufacturing an electrode paste |
WO2015084945A1 (en) * | 2013-12-04 | 2015-06-11 | Cornell University | Electrospun composite nanofiber comprising graphene nanoribbon or graphene oxide nanoribbon, methods for producing same, and applications of same |
KR101684396B1 (ko) | 2014-05-15 | 2016-12-08 | 주식회사 엘지화학 | 유연성 집전체를 포함하는 전지셀 |
KR101618218B1 (ko) * | 2014-09-26 | 2016-05-09 | 대한민국 | 셀룰로오스 나노섬유 분리막을 포함하는 전기화학소자 및 이의 제조방법 |
KR101622354B1 (ko) * | 2014-10-14 | 2016-05-18 | 울산과학기술원 | 삼차원구조 전극의 제조 방법, 그리고 상기 전극을 포함하는 전기 화학 소자 |
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KR101647960B1 (ko) * | 2014-10-31 | 2016-08-17 | 한국에너지기술연구원 | 탄소 전극 및 이의 제조 방법 |
KR101653164B1 (ko) * | 2014-11-25 | 2016-09-01 | 울산과학기술원 | 삼차원구조 집전체, 이의 제조 방법, 이를 포함하는 전극, 상기 전극의 제조방법, 및 상기 집전체를 포함하는 전기 화학 소자 |
KR101829097B1 (ko) * | 2015-01-14 | 2018-02-13 | 주식회사 엘지화학 | 리튬-황 전지용 양극 및 그의 제조방법 및 그를 포함하는 리튬-황 전지 |
EP3297074B1 (en) * | 2015-05-13 | 2020-04-22 | Korea Forest Research Institute | Three-dimensional mesh structure form electrode for electrochemical device, method for producing same, and electrochemical device comprising same |
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- 2016-12-06 EP EP16923202.2A patent/EP3553857A4/en not_active Withdrawn
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- 2016-12-06 WO PCT/KR2016/014242 patent/WO2018105767A1/ko unknown
- 2016-12-06 US US16/467,339 patent/US20200044259A1/en not_active Abandoned
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JP2020501305A (ja) | 2020-01-16 |
WO2018105767A1 (ko) | 2018-06-14 |
CN110050369A (zh) | 2019-07-23 |
EP3553857A4 (en) | 2020-07-15 |
EP3553857A1 (en) | 2019-10-16 |
KR101817506B1 (ko) | 2018-01-12 |
US20200044259A1 (en) | 2020-02-06 |
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