JP2011076931A - リチウムイオン二次電池の正極材、およびその製造方法 - Google Patents
リチウムイオン二次電池の正極材、およびその製造方法 Download PDFInfo
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- 239000007774 positive electrode material Substances 0.000 title claims abstract description 71
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 42
- 238000004519 manufacturing process Methods 0.000 title claims description 24
- 238000000034 method Methods 0.000 title claims description 19
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims abstract description 90
- 239000002245 particle Substances 0.000 claims abstract description 79
- 239000007788 liquid Substances 0.000 claims abstract description 56
- 239000002717 carbon nanostructure Substances 0.000 claims abstract description 48
- 229910052744 lithium Inorganic materials 0.000 claims description 41
- -1 phosphate compound Chemical class 0.000 claims description 33
- 229910019142 PO4 Inorganic materials 0.000 claims description 32
- 239000010452 phosphate Substances 0.000 claims description 32
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 claims description 30
- 150000002894 organic compounds Chemical class 0.000 claims description 25
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 18
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 18
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 abstract description 27
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical group [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 abstract description 12
- ZSYNKHJUSDFTCQ-UHFFFAOYSA-N [Li].[Fe].P(O)(O)(O)=O Chemical compound [Li].[Fe].P(O)(O)(O)=O ZSYNKHJUSDFTCQ-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052786 argon Inorganic materials 0.000 abstract description 6
- 239000011148 porous material Substances 0.000 abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 29
- 229910052799 carbon Inorganic materials 0.000 description 27
- 230000015572 biosynthetic process Effects 0.000 description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 8
- 229910021450 lithium metal oxide Inorganic materials 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 229910010707 LiFePO 4 Inorganic materials 0.000 description 3
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 3
- 239000001307 helium Substances 0.000 description 3
- 229910052734 helium Inorganic materials 0.000 description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 3
- 229910052754 neon Inorganic materials 0.000 description 3
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 3
- 235000011007 phosphoric acid Nutrition 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- XMWRBQBLMFGWIX-UHFFFAOYSA-N C60 fullerene Chemical compound C12=C3C(C4=C56)=C7C8=C5C5=C9C%10=C6C6=C4C1=C1C4=C6C6=C%10C%10=C9C9=C%11C5=C8C5=C8C7=C3C3=C7C2=C1C1=C2C4=C6C4=C%10C6=C9C9=C%11C5=C5C8=C3C3=C7C1=C1C2=C4C6=C2C9=C5C3=C12 XMWRBQBLMFGWIX-UHFFFAOYSA-N 0.000 description 2
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 2
- 229910015643 LiMn 2 O 4 Inorganic materials 0.000 description 2
- 229910013290 LiNiO 2 Inorganic materials 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 239000002041 carbon nanotube Substances 0.000 description 2
- 229910021393 carbon nanotube Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 229910003472 fullerene Inorganic materials 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 239000002116 nanohorn Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000002230 thermal chemical vapour deposition Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 238000004438 BET method Methods 0.000 description 1
- QSNQXZYQEIKDPU-UHFFFAOYSA-N [Li].[Fe] Chemical compound [Li].[Fe] QSNQXZYQEIKDPU-UHFFFAOYSA-N 0.000 description 1
- 150000008043 acidic salts Chemical class 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000011852 carbon nanoparticle Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- XPPKVPWEQAFLFU-UHFFFAOYSA-N diphosphoric acid Chemical compound OP(O)(=O)OP(O)(O)=O XPPKVPWEQAFLFU-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 150000003016 phosphoric acids Chemical class 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 229940005657 pyrophosphoric acid Drugs 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 230000003381 solubilizing effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 150000004072 triols Chemical class 0.000 description 1
- UNXRWKVEANCORM-UHFFFAOYSA-N triphosphoric acid Chemical compound OP(O)(=O)OP(O)(=O)OP(O)(O)=O UNXRWKVEANCORM-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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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- Battery Electrode And Active Subsutance (AREA)
Abstract
【解決手段】液中CVD装置10の容器11に、2−プロパノールを500mlを入れて、液中電極12が2−プロパノール中に漬かるようにし、液面が液中電極12と液外電極13との中間に位置するようにした。そして、リチウム鉄リン酸からなる粒子2を液中電極12上に配置して2−プロパノール中に混合した。次に、容器11を密閉し、容器11内の気体をアルゴンに置換した。次に、液中電極12と液外電極13間に電圧を印加し、成膜処理を開始した。これにより、電極間に大気圧プラズマが発生して2−プロパノールが分解され、粒子2の表面に空孔4を有したカーボンナノ構造体3が成膜される。
【選択図】図2
Description
2:リチウム鉄リン酸の粒子
3:カーボンナノ構造体
4:空孔
10:液中CVD装置
11:容器
12:液中電極
13、23:液外電極
Claims (10)
- リチウム金属リン酸塩化合物粒子の表面に、カーボンナノ構造体を有したリチウムイオン二次電池の正極材。
- 前記正極材の比表面積は、13〜24m2 /gであることを特徴とする請求項1に記載のリチウムイオン二次電池の正極材。
- 前記正極材に対する前記カーボンナノ構造体の質量比は、1.0〜5.0wt%であることを特徴とする請求項1または請求項2に記載のリチウムイオン二次電池の正極材。
- 前記リチウム金属リン酸塩化合物粒子は、リチウム鉄リン酸粒子であることを特徴とする請求項1ないし請求項3のいずれか1項に記載のリチウムイオン二次電池の正極材。
- 液体の有機化合物、または有機化合物を含む液体に、リチウム金属リン酸塩化合物粒子を混合し、
前記液体と電離用ガスとの界面にプラズマを発生させて、前記有機化合物を分解し、前記リチウム金属リン酸塩化合物粒子の表面にカーボンナノ構造体を成膜する、
ことを特徴とするリチウムイオン二次電池の正極材の製造方法。 - 前記プラズマは、前記液体と前記電離用ガスとを挟むようにして一対の電極を配置し、前記一対の電極間に電圧を印加することで発生させる、ことを特徴とする請求項5に記載のリチウムイオン二次電池の正極材の製造方法。
- 液体の有機化合物または有機化合物を含む液体と、電離用ガスとを挟むようにして一対の電極を配置し、
前記一対の電極間に電圧を印加することで、前記液体と前記電離用ガスとの界面にプラズマを発生させ、
前記液体にリチウム金属リン酸塩化合物粒子を混合させた混合物を、前記プラズマ中に滴下させることで、前記有機化合物を分解し、前記リチウム金属リン酸塩化合物粒子の表面にカーボンナノ構造体を成膜する、
ことを特徴とするリチウムイオン二次電池の正極材の製造方法。 - 前記一対の電極のうち、前記電離用ガス中に配置される液外電極は、中空部を有する筒状であり、前記液外電極の中空部に前記混合物を供給して、前記混合物を滴下させる、ことを特徴とする請求項7に記載のリチウムイオン二次電池の正極材の製造方法。
- 前記リチウム金属リン酸塩化合物粒子は、リチウム鉄リン酸粒子であることを特徴とする請求項5ないし請求項8のいずれか1項に記載のリチウムイオン二次電池の正極材の製造方法。
- 前記有機化合物は、メタノール、エタノール、1−プロパノール、または2−プロパノールであることを特徴とする請求項5ないし請求項9のいずれか1項に記載のリチウムイオン二次電池の正極材の製造方法。
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