JP6203709B2 - リチウム二次電池 - Google Patents
リチウム二次電池 Download PDFInfo
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- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
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- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/5825—Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
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- H—ELECTRICITY
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- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
- H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
- H01M50/417—Polyolefins
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- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
- H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
- H01M50/423—Polyamide resins
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/463—Separators, membranes or diaphragms characterised by their shape
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
- H01M50/491—Porosity
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
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Description
本出願は、2011年5月31日出願の韓国特許出願第10−2011−0051886号に基づく優先権を主張し、該当出願の明細書及び図面に開示された内容は、すべて本出願に援用される。
平均粒径が10umであるLiNi0.5Co0.2Mn0.3O2 100重量部に、平均粒径が1umであるオリビン型リン酸鉄リチウム(LiFePO4)2重量部、TiO2 0.1重量部、Super−P 0.3重量部を乾式コーティングしてコア−シェル型正極活物質を製造した。
メタ‐アラミド(ポリ(メタ‐フェニレンイソフタルアミド))45重量部、N,N‐ジメチルアセトアミド 55重量部を混合してスラリーを製造する。製造されたスラリーをダイコーター(die coater)でポリエチレン(PE)多孔性膜(厚さ:16um)の両面に各3umの厚さにコーティングし、全体の厚さが22umである複合体多孔性セパレータを製造した。
また、セパレータのコーティング前後の物性データを表1に示した。
上記のように製造された正極と負極との間に上記のように製造されたセパレータを介在させた後、アルミニウム外装材内に収納し、エチレンカーボネート:エチルメチルカーボネート=1:3の体積比で混合した非水溶媒に1.15MになるようにLiPF6を溶解させた非水電解液を注入してリチウム二次電池を製造した。電池規格は厚さ10mm×幅216mm×長さ216mmであって、設計容量は40Ahにした。
正極活物質として平均粒径が9umであるLiNi0.4Co0.3Mn0.3O2を使用し、負極活物質として平均粒径が20umであるメソフェーズグラファイト粉末を使用し、セパレータとしてポリエチレン多孔性膜を使用したことを除き、実施例1と同様の方法で電池を製造した。
正極活物質として平均粒径が9umであるLiNi0.4Co0.3Mn0.3O2を使用し、負極活物質として平均粒径が20umであるメソフェーズグラファイト粉末を使用したことを除き、実施例1と同様の方法で電池を製造した。
セパレータとして両面にセラミックをコーティングしたポリエチレン多孔性膜を使用したことを除き、実施例1と同様の方法で電池を製造した。
実施例及び比較例によって製造されたリチウム二次電池を、充放電サイクル装置を用いて放電特性及び常温におけるサイクル特性を評価した。
実施例及び比較例によって製造された電池を用いて過充電特性、熱的安全性(加熱特性)、及び釘貫通特性による電池の形状変化及び表面温度変化を測定し、その結果を下記表3に示した。また、それぞれの安全性評価項目による電圧及び温度の変化を図4(過充電特性)、図5(熱的安全性)、図6(釘貫通特性)にそれぞれ示した。
Claims (8)
- 正極、負極、及び前記正極と負極との間に介在したセパレータを備えるリチウム二次電池において、
前記セパレータが、アラミドが少なくとも一面にコーティングされてなるアラミドコーティング層を備えたポリオレフィン多孔性膜であり、
前記正極がオリビン型リン酸鉄リチウムコーティング層を備えたリチウム金属酸化物である正極活物質を備え、
前記負極がスピネル型リチウムチタン酸化物コーティング層を備えた炭素材である負極活物質を備え、
前記正極活物質及び前記負極活物質が、シェル部に二酸化チタンと伝導性炭素との混合物をさらに含み、
前記オリビン型リン酸鉄リチウムの含量が、リチウム金属酸化物100重量部対比1重量部ないし3重量部であり、
前記スピネル型リチウムチタン酸化物の含量が、炭素材100重量部対比1.5重量部ないし2.5重量部であるリチウム二次電池。 - 前記ポリオレフィン多孔性膜の厚さが、10umないし30um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。
- 前記アラミドコーティング層の厚さが、2umないし10um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。
- 前記セパレータの通気度が400sec/100ml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。
- 前記セパレータの通気度が、ポリオレフィン多孔性膜の通気度を基準にして35%以下で減少した値を有す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。
- 前記セパレータの破断強度が、500kgf/cm2以上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。
- 前記リチウム金属酸化物が、LiCoO2、LiNiO2、LiNiCoO2、LiNixCoyAlzO2(0<x<1、0<y<1、0<z<1、x+y+z=1)、LiNixCoyMnzO2(0<x<1、0<y<1、0<z<1、x+y+z=1)、及びLiMn2O4からなる群より選択されるいずれか1つまたはこれらの組合せ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。
- 前記炭素材が、軟質炭素、硬質炭素、天然黒鉛、キッシュ黒鉛、熱分解炭素、液晶ピッチ系炭素繊維、メソカーボンマイクロビーズ、液晶ピッチ、及び石油または石炭系コークスからなる群より選択されるいずれか1つまたはこれらの組合せ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。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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KR10-2011-0051886 | 2011-05-31 | ||
KR1020110051886A KR101308677B1 (ko) | 2011-05-31 | 2011-05-31 | 리튬 이차전지 |
PCT/KR2012/002334 WO2012165758A1 (ko) | 2011-05-31 | 2012-03-29 | 리튬 이차전지 |
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JP2014518432A JP2014518432A (ja) | 2014-07-28 |
JP6203709B2 true JP6203709B2 (ja) | 2017-09-27 |
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US (1) | US9252413B2 (ja) |
EP (1) | EP2717375B1 (ja) |
JP (1) | JP6203709B2 (ja) |
KR (1) | KR101308677B1 (ja) |
CN (1) | CN103650229A (ja) |
WO (1) | WO2012165758A1 (ja) |
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KR101464509B1 (ko) * | 2012-12-28 | 2014-11-25 | 주식회사 에코프로 | 리튬이차전지용 양극활물질의 제조 방법 및 이에 의하여 제조된 리튬이차전지용 양극활물질 |
KR101657742B1 (ko) * | 2013-04-10 | 2016-09-19 | 주식회사 엘지화학 | 이차전지용 양극 및 이의 제조 방법 |
US10593930B2 (en) | 2013-06-20 | 2020-03-17 | Lg Chem, Ltd. | High capacity electrode active material for lithium secondary battery and lithium secondary battery using the same |
KR101469050B1 (ko) * | 2013-06-21 | 2014-12-04 | 주식회사 휴비스 | 셧다운 기능 및 열안정성이 우수한 전지용 세퍼레이터 및 이를 이용한 2차 전지 |
JP6395837B2 (ja) * | 2013-08-21 | 2018-09-26 | ハイドロ−ケベック | リチウム二次電池用の正極材料 |
KR101676408B1 (ko) | 2013-10-31 | 2016-11-15 | 주식회사 엘지화학 | 전극-분리막 복합체의 제조방법, 그 제조방법에 의해 제조된 전극-분리막 복합체 및 그를 포함하는 리튬 이차전지 |
CN103647049A (zh) * | 2013-12-04 | 2014-03-19 | 合肥国轩高科动力能源股份公司 | 一种磷酸铁锂薄膜电极的制备方法 |
KR102273772B1 (ko) | 2014-05-21 | 2021-07-06 | 삼성에스디아이 주식회사 | 복합 양극 활물질, 이를 포함하는 리튬 전지, 및 이의 제조방법 |
JP6591404B2 (ja) * | 2014-10-16 | 2019-10-16 | エルジー・ケム・リミテッド | 低温特性改善用添加剤を含む二次電池用負極及びこれを含む二次電池 |
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KR102379762B1 (ko) * | 2015-08-13 | 2022-03-25 | 삼성에스디아이 주식회사 | 리튬 이차 전지 |
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JP7320418B2 (ja) * | 2019-09-20 | 2023-08-03 | 太平洋セメント株式会社 | リチウムイオン二次電池用混合型正極活物質及びリチウムイオン二次電池用正極の製造方法 |
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KR101105876B1 (ko) * | 2009-11-16 | 2012-01-16 | 주식회사 코캄 | 리튬 이차전지용 분리막 및 이를 포함하는 리튬 이차전지 |
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KR20120133288A (ko) | 2012-12-10 |
EP2717375A1 (en) | 2014-04-09 |
US20140087233A1 (en) | 2014-03-27 |
WO2012165758A1 (ko) | 2012-12-06 |
EP2717375B1 (en) | 2017-08-09 |
JP2014518432A (ja) | 2014-07-28 |
KR101308677B1 (ko) | 2013-09-13 |
CN103650229A (zh) | 2014-03-19 |
EP2717375A4 (en) | 2015-02-18 |
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