JP2021515963A - 二次電池用電極およびその製造方法 - Google Patents
二次電池用電極およびその製造方法 Download PDFInfo
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- WVLBCYQITXONBZ-UHFFFAOYSA-N trimethyl phosphate Chemical compound COP(=O)(OC)OC WVLBCYQITXONBZ-UHFFFAOYSA-N 0.000 description 1
- XZZNDPSIHUTMOC-UHFFFAOYSA-N triphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)(=O)OC1=CC=CC=C1 XZZNDPSIHUTMOC-UHFFFAOYSA-N 0.000 description 1
- OXFUXNFMHFCELM-UHFFFAOYSA-N tripropan-2-yl phosphate Chemical compound CC(C)OP(=O)(OC(C)C)OC(C)C OXFUXNFMHFCELM-UHFFFAOYSA-N 0.000 description 1
- RXPQRKFMDQNODS-UHFFFAOYSA-N tripropyl phosphate Chemical compound CCCOP(=O)(OCCC)OCCC RXPQRKFMDQNODS-UHFFFAOYSA-N 0.000 description 1
- HQUQLFOMPYWACS-UHFFFAOYSA-N tris(2-chloroethyl) phosphate Chemical compound ClCCOP(=O)(OCCCl)OCCCl HQUQLFOMPYWACS-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 235000012431 wafers Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
Claims (37)
- 活物質バルクを切断し、活物質膜を製造する切断ステップと、
集電体と前記活物質膜を一体化する結着ステップとを含む、二次電池用電極の製造方法。 - 前記切断の前、粒子状の電極活物質を含む原料を用いて、活物質バルク(bulk)を製造するバルク製造ステップをさらに含む、請求項1に記載の二次電池用電極の製造方法。
- 前記電極活物質は、負極活物質または正極活物質である、請求項1に記載の二次電池用電極の製造方法。
- 前記活物質バルクは、自立可能である、請求項1に記載の二次電池用電極の製造方法。
- 前記バルク製造ステップは、前記原料を圧縮成形して成形体を製造する成形ステップ;または、前記成形ステップと、成形ステップで製造された成形体に熱処理を施し、焼結体を製造する焼結ステップ;を含む、請求項2に記載の二次電池用電極の製造方法。
- 前記原料は、バインダー、導電材、炭素前駆体および気孔形成剤から選択される一つ以上の添加剤をさらに含む、請求項1に記載の二次電池用電極の製造方法。
- 前記導電材は、伝導性炭素、伝導性高分子および金属から選択される一つまたは二つ以上の物質の粒子、繊維、ナノ構造体またはこれらの混合物を含む、請求項6に記載の二次電池用電極の製造方法。
- 前記炭素前駆体は、コークス、ピッチ、熱硬化性樹脂および熱可塑性樹脂から選択される一つ以上である、請求項6に記載の二次電池用電極の製造方法。
- 前記粒子状の粒子は、電極活物質のコア;異種物質のシェル;のコア−シェル構造である、請求項1に記載の二次電池用電極の製造方法。
- 前記異種物質は、第2の電極活物質、第2の電極活物質の前駆体、伝導性物質、バインダー、炭素前駆体またはこれらの混合物を含む、請求項9に記載の二次電池用電極の製造方法。
- 前記活物質バルクの気孔率によって前記活物質膜の気孔率が制御される、請求項1に記載の二次電池用電極の製造方法。
- 前記活物質バルク内の電極活物質は、配向性を有し、前記切断ステップの切断方向によって前記活物質膜の厚さ方向を基準とする活物質膜内の電極活物質の配向方向が制御される、請求項1に記載の二次電池用電極の製造方法。
- 前記結着ステップは、
前記集電体の表面と前記活物質膜の表面のうち少なくとも一表面に接着層を形成するステップと、
前記接着層を挟んで前記集電体と前記活物質膜が当接するように積層するステップとを含む、請求項1に記載の二次電池用電極の製造方法。 - 前記結着ステップは、
前記活物質膜の一表面に金属膜を形成するステップを含む、請求項1に記載の二次電池用電極の製造方法。 - 前記負極活物質は、易黒鉛化性炭素;難黒鉛化性炭素;天然黒鉛;人造黒鉛;カーボンナノチューブ;グラフェン;シリコン;Sn合金;Si合金;Sn、Si、Ti、Ni、FeおよびLiから選択される一つまたは二つ以上の元素の酸化物;またはこれらの混合物を含む、請求項3に記載の二次電池用電極の製造方法。
- 前記正極活物質は、層状構造のリチウム−金属酸化物;スピネル構造のリチウム−金属酸化物;オリビン構造のリチウム−金属ホスフェート;またはこれらの混合物を含む、請求項3に記載の二次電池用電極の製造方法。
- 前記活物質は、天然黒鉛、人造黒鉛またはこれらの混合物を含有する、請求項6に記載の二次電池用電極の製造方法。
- 前記活物質は、板状またはフレーク状を含む、請求項6に記載の二次電池用電極の製造方法。
- 前記バルク製造ステップは、粒子状の電極活物質として電極活物質コア−炭素前駆体シェルのコア−シェル構造の複合粒子を含む原料を加圧成形し、成形体を製造するステップと、前記成形体に熱処理を施し、前記シェルの炭素前駆体を炭素に熱分解するステップとを含む、請求項2に記載の二次電池用電極の製造方法。
- 前記バルク製造ステップは、粒子状の電極活物質および炭素前駆体を含む原料を加圧成形し、成形体を製造するステップと、前記成形体に熱処理を施し、前記炭素前駆体を炭素に熱分解するステップとを含む、請求項2に記載の二次電池用電極の製造方法。
- 前記切断ステップの後、結着ステップの前、または結着ステップの後、
前記活物質膜の少なくとも一表面に表面処理を施すステップがさらに行われる、請求項1に記載の二次電池用電極の製造方法。 - 請求項1から21のいずれか一項に記載の製造方法により製造される、二次電池用電極。
- 正極と、負極と、前記正極と負極との間に介在されたセパレータと、電解液とを含み、
前記正極および負極から選択される一つ以上の電極は、電極活物質を含有する活物質膜と、集電体と、前記活物質膜を集電体に付着させる接着剤とを含む、リチウム二次電池。 - 正極と、負極と、前記正極と負極との間に介在されたセパレータと、電解液とを含み、前記正極および負極から選択される一つ以上の電極に含まれた活物質膜は、有機バインダーを含有しないバインダーフリー(binder−free)膜である、リチウム二次電池。
- 前記活物質膜は、自立膜である、請求項23または24に記載のリチウム二次電池。
- 前記活物質膜は、電極活物質を含有する成形体または焼結体から切断された切断膜である、請求項23または24に記載のリチウム二次電池。
- 前記活物質膜は、活物質膜の厚さ方向を基準として、活物質膜内の電極活物質が配向性を有する、請求項23または24に記載のリチウム二次電池。
- 前記活物質膜は、電極活物質の粒子間ネック(neck)が形成されている、請求項23または24に記載のリチウム二次電池。
- 前記活物質膜は、厚さ方向の断面を基準として、表面領域での気孔率と中央領域での気孔率との差の絶対値を中央領域での気孔率で除した比率が10%以下である、請求項23または24に記載のリチウム二次電池。
- 前記活物質膜は、熱分解炭素および導電材から選択される1種以上をさらに含む、請求項23または24に記載のリチウム二次電池。
- 前記活物質膜の見掛気孔率は、10〜45%である、請求項23または24に記載のリチウム二次電池。
- 前記接着剤は、硬化能を有する樹脂を含む、請求項23に記載のリチウム二次電池。
- 前記接着剤は、伝導性接着剤である、請求項23に記載のリチウム二次電池。
- 前記電極活物質は、負極活物質または正極活物質である、請求項23または24に記載のリチウム二次電池。
- 前記活物質膜の表面に位置する活物質は、切断された粒子状である、請求項23または24に記載のリチウム二次電池。
- 請求項23または24に記載のリチウム二次電池を含む、リチウム二次電池モジュール。
- 請求項23または24に記載のリチウム二次電池により電力が供給される装置。
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KR10-2018-0030070 | 2018-03-15 | ||
KR20180030070 | 2018-03-15 | ||
KR10-2019-0029127 | 2019-03-14 | ||
KR1020190029127A KR20190109284A (ko) | 2018-03-15 | 2019-03-14 | 이차전지용 전극 및 이의 제조방법 |
PCT/KR2019/003006 WO2019177409A1 (ko) | 2018-03-15 | 2019-03-15 | 이차전지용 전극 및 이의 제조방법 |
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KR20210060164A (ko) | 2019-11-18 | 2021-05-26 | 현대자동차주식회사 | 이차전지용 전극 및 그 제조방법 |
CN110993885A (zh) * | 2019-12-19 | 2020-04-10 | 佛山市恩力晟和能源科技有限公司 | 一种二次电池用电极的成型方法 |
CN111628170B (zh) * | 2020-04-23 | 2023-10-17 | 湖南中科星城石墨有限公司 | 一种锂离子电池用多孔二次颗粒负极材料及其制备方法 |
KR20220052489A (ko) * | 2020-10-21 | 2022-04-28 | 주식회사 엘지에너지솔루션 | 리튬 이차전지용 양극, 이의 제조방법 및 이를 포함하는 리튬 이차전지 |
JP7410074B2 (ja) | 2021-03-26 | 2024-01-09 | プライムアースEvエナジー株式会社 | 二次電池用電極の製造方法 |
WO2023080514A1 (ko) * | 2021-11-03 | 2023-05-11 | 주식회사 엘지화학 | 부착 증진층이 코팅된 양극 집전체의 제조방법 및 그로부터 제조된 부착 증진층이 코팅된 양극 집전체, 리튬 이차 전지용 양극의 제조방법 및 그로부터 제조된 리튬 이차 전지용 양극 및 이를 포함하는 리튬 이차 전지 |
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US20210020898A1 (en) | 2021-01-21 |
CN111788722A (zh) | 2020-10-16 |
US11996539B2 (en) | 2024-05-28 |
EP3767711A1 (en) | 2021-01-20 |
EP3767711A4 (en) | 2022-06-08 |
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