JP2012206916A - リチウムイオン電池用正極活物質用熱処理容器およびその製造方法 - Google Patents
リチウムイオン電池用正極活物質用熱処理容器およびその製造方法 Download PDFInfo
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- JP2012206916A JP2012206916A JP2011075473A JP2011075473A JP2012206916A JP 2012206916 A JP2012206916 A JP 2012206916A JP 2011075473 A JP2011075473 A JP 2011075473A JP 2011075473 A JP2011075473 A JP 2011075473A JP 2012206916 A JP2012206916 A JP 2012206916A
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- heat treatment
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 254
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 51
- 229910001416 lithium ion Inorganic materials 0.000 title description 41
- 239000007774 positive electrode material Substances 0.000 title description 39
- 150000001875 compounds Chemical class 0.000 claims abstract description 222
- 239000000843 powder Substances 0.000 claims abstract description 161
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 151
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 149
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 112
- 229910052596 spinel Inorganic materials 0.000 claims abstract description 67
- 239000011029 spinel Substances 0.000 claims abstract description 67
- 239000000463 material Substances 0.000 claims description 61
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 44
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 40
- 229910052863 mullite Inorganic materials 0.000 claims description 40
- 238000010304 firing Methods 0.000 claims description 29
- 238000012545 processing Methods 0.000 claims description 29
- 239000000377 silicon dioxide Substances 0.000 claims description 22
- 238000000465 moulding Methods 0.000 claims description 13
- 239000011812 mixed powder Substances 0.000 claims description 9
- 238000001354 calcination Methods 0.000 abstract 1
- 238000000748 compression moulding Methods 0.000 abstract 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 48
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 40
- 230000009257 reactivity Effects 0.000 description 39
- 230000035939 shock Effects 0.000 description 38
- 239000002994 raw material Substances 0.000 description 37
- 238000011109 contamination Methods 0.000 description 28
- 239000000395 magnesium oxide Substances 0.000 description 24
- 239000008188 pellet Substances 0.000 description 24
- 239000007795 chemical reaction product Substances 0.000 description 21
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 19
- 239000000126 substance Substances 0.000 description 17
- 238000000034 method Methods 0.000 description 16
- 238000005336 cracking Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 12
- 238000005259 measurement Methods 0.000 description 12
- 229910052878 cordierite Inorganic materials 0.000 description 11
- 239000000470 constituent Substances 0.000 description 10
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- 239000004570 mortar (masonry) Substances 0.000 description 8
- 239000000047 product Substances 0.000 description 8
- 229910004298 SiO 2 Inorganic materials 0.000 description 7
- 230000003628 erosive effect Effects 0.000 description 6
- 230000005484 gravity Effects 0.000 description 6
- 239000012535 impurity Substances 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- 230000003746 surface roughness Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 229910000323 aluminium silicate Inorganic materials 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 150000002484 inorganic compounds Chemical class 0.000 description 3
- 229910010272 inorganic material Inorganic materials 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 229910001228 Li[Ni1/3Co1/3Mn1/3]O2 (NCM 111) Inorganic materials 0.000 description 2
- 239000006182 cathode active material Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 150000002641 lithium Chemical class 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 229910020599 Co 3 O 4 Inorganic materials 0.000 description 1
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 1
- 229910015643 LiMn 2 O 4 Inorganic materials 0.000 description 1
- 229910014689 LiMnO Inorganic materials 0.000 description 1
- 229910013290 LiNiO 2 Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- LBFUKZWYPLNNJC-UHFFFAOYSA-N cobalt(ii,iii) oxide Chemical compound [Co]=O.O=[Co]O[Co]=O LBFUKZWYPLNNJC-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- -1 inorganic compounds Chemical class 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- BFDHFSHZJLFAMC-UHFFFAOYSA-L nickel(ii) hydroxide Chemical compound [OH-].[OH-].[Ni+2] BFDHFSHZJLFAMC-UHFFFAOYSA-L 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000009774 resonance method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
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Abstract
【課題】 リチウム含有化合物用熱処理容器及びその製造方法を提供すること。
【解決手段】 本発明のリチウム含有化合物用熱処理容器は、リチウム含有化合物を熱処理するときにリチウム含有化合物が配されるリチウム含有化合物用熱処理容器において、60〜95mass%でアルミナを含有する基部と、20〜80mass%でスピネルを含有してなり、基部と一体に形成された表面部と、を有することを特徴とする。また、本発明の製造方法は、アルミナ系粉末を配置する工程と、スピネル系粉末をアルミナ系粉末の上方に配置する工程と、圧縮して成形する工程と、焼成する工程と、を有することを特徴とする。
【選択図】 なし
Description
本発明の熱処理容器は、耐熱性の高い材質よりなる基部と、被熱処理化合物に対して反応性の低い材質を多量に含む(主な構成成分とし)表面部と、が一体に形成されていることを特徴とする。
本発明のリチウム含有化合物用熱処理容器(以下、本発明の熱処理容器と称する)は、リチウム含有化合物を熱処理するときにリチウム含有化合物が配されるリチウム含有化合物用熱処理容器である。本発明の熱処理容器において、熱処理されるリチウム含有化合物は、その化学式中にリチウム(Li)を含んでいる化合物であればよく、さらにリチウムを含んでいる化合物を混合した混合物であってもよい。
本発明の熱処理容器の製造方法は、上記の熱処理容器、及び上記熱処理容器をリチウム含有化合物の熱処理に適用するリチウム含有化合物用熱処理容器の製造方法である。すなわち、本発明の製造方法は、それぞれの熱処理容器を製造する製造方法である。
本発明のリチウム含有化合物用熱処理容器の製造方法は、まず、60〜95mass%でアルミナ(Al2O3)を含有するアルミナ系粉末を非圧縮状態で配置する工程を施す。アルミナ系粉末を非圧縮の状態で配置することで、その後の工程で成形したときに、基部の界面が絡み合った界面となり、熱処理容器において基部が界面で剥離しなくなる。また、熱処理容器の体積変化を、より規制することができる。
アルミナ粉末,ムライト粉末,コーディエライト粉末及びその他の添加剤を、表1に示した質量部で秤量し、十分に混合した。これにより、試料A〜Cのアルミナ系粉末を調整した。
試料1〜6の熱処理容器として、リチウム含有化合物(LiNi1/3Co1/3Mn1/3O2)の焼成を行い、試験中の弾性率の変化及び焼成後の状態を観察した。
試料1〜9の熱処理容器の20回の焼成試験後の各試料の断面を観察した。
上記の繰り返しの焼成試験中、試料1〜6の熱処理容器の弾性率を測定した。
試料2,5において、表面部を形成するためのスピネル系粉末において、試料Aまたは試料Cとスピネルの混合割合を変化させた混合粉末を用いたこと以外は、実施例1の時と同様にして、試料10〜19の熱処理容器を製造した。試料10〜19の熱処理容器の表面部の原料の割合を、表3に示した。ここで、試料12と試料17は、それぞれ試料2,試料5と同じである。
試料2,5において、表面部を形成するためのスピネル系粉末において、試料Aまたは試料Cとスピネルの混合割合を変化させた混合粉末を用いたこと以外は、実施例1の時と同様にして、試料20〜25の熱処理容器を製造した。
上記の実施例では、板状の熱処理容器を用いて、ペレット状のリチウム含有化合物の焼成を行ったが、熱処理容器の形状及びリチウム含有化合物の配置形態は、これらに限定されるものではない。
本発明のリチウムイオン電池用正極活物質用熱処理容器(以下、本発明の熱処理容器と称する)は、リチウムイオン電池用正極活物質の原料粉末を熱処理するときに原料粉末が配されるリチウムイオン電池用正極活物質用熱処理容器である。本発明の熱処理容器において、熱処理されるリチウムイオン電池用正極活物質の原料粉末は、その化学式中にリチウム(Li)を含んでいる化合物であればよく、さらにリチウムを含んでいる化合物を混合した混合物であってもよい。
本発明の熱処理容器の製造方法は、上記の熱処理容器、及び上記熱処理容器をリチウムイオン電池用正極活物質の原料粉末の熱処理に適用するリチウムイオン電池用正極活物質用熱処理容器の製造方法である。すなわち、本発明の製造方法は、それぞれの熱処理容器を製造する製造方法である。
本発明のリチウムイオン電池用正極活物質用熱処理容器の製造方法は、まず、60〜95mass%でアルミナ(Al2O3)を含有するアルミナ系粉末を非圧縮状態で配置する工程を施す。アルミナ系粉末を非圧縮の状態で配置することで、その後の工程で成形したときに、基部の界面が絡み合った界面となり、熱処理容器において基部が界面で剥離しなくなる。また、熱処理容器の体積変化を、より規制することができる。
Claims (12)
- リチウム含有化合物を熱処理するときに該リチウム含有化合物が配されるリチウム含有化合物用熱処理容器において、
基部全体を100mass%としたときに、60〜95mass%でアルミナを含有する基部と、
表面部全体を100mass%としたときに、20〜80mass%でスピネルを含有してなり、該基部と一体に形成され、該リチウム含有化合物用熱処理容器のうち該リチウム含有化合物と当接する表面を形成する表面部と、
を有することを特徴とするリチウム含有化合物用熱処理容器。 - 前記表面部は、残部が前記基部を形成する材質よりなる請求項1記載のリチウム含有化合物用熱処理容器。
- 前記表面部は、前記リチウム含有化合物用熱処理容器全体を100mass%としたときに、5〜40mass%で含まれる請求項1〜2のいずれかに記載のリチウム含有化合物用熱処理容器。
- 前記基部は、該基部全体を100mass%としたときに、5〜30mass%でシリカを含有する請求項1〜3のいずれかに記載のリチウム含有化合物用熱処理容器。
- 前記基部は、アルミナとムライトから形成される請求項1〜4のいずれかに記載のリチウム含有化合物用熱処理容器。
- 前記表面部は、前記基部側の界面が、凹凸形状をなしている請求項1〜5のいずれかに記載のリチウム含有化合物用熱処理容器。
- 前記基部は、10〜30%の気孔率を有する請求項1〜6のいずれかに記載のリチウム含有化合物用熱処理容器。
- 60〜95mass%でアルミナを含有するアルミナ系粉末を非圧縮状態で配置する工程と、
20〜80mass%でスピネルを含有するスピネル系粉末を、該アルミナ系粉末の上方に、非圧縮状態で配置する工程と、
該アルミナ系粉末と該スピネル系粉末が重なった方向に圧縮して、成形する工程と、
成形体を焼成する工程と、
を有することを特徴とするリチウム含有化合物用熱処理容器の製造方法。 - 前記スピネル系粉末は、残部が前記アルミナ系粉末である請求項8記載のリチウム含有化合物用熱処理容器の製造方法。
- 前記スピネル系粉末は、全体を100mass%としたときに、20〜80mass%で含まれる請求項8〜9のいずれかに記載のリチウム含有化合物用熱処理容器の製造方法。
- 前記アルミナ系粉末は、全体を100mass%としたときに、5〜30mass%でシリカ粉末を含有する請求項8〜10のいずれかに記載のリチウム含有化合物用熱処理容器の製造方法。
- 前記アルミナ系粉末は、アルミナ粉末とムライト粉末の混合粉末である請求項8〜11のいずれかに記載のリチウム含有化合物用熱処理容器の製造方法。
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CN201180069877.0A CN103502182B (zh) | 2011-03-30 | 2011-06-28 | 用于锂离子电池的正极活性材料的热处理容器及其制造方法 |
PCT/JP2011/003669 WO2012131791A1 (ja) | 2011-03-30 | 2011-06-28 | リチウム含有化合物用熱処理容器およびその製造方法 |
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JP2014227326A (ja) * | 2013-05-24 | 2014-12-08 | 東京窯業株式会社 | 熱処理容器 |
JP2014227327A (ja) * | 2013-05-24 | 2014-12-08 | 東京窯業株式会社 | 熱処理容器 |
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