JP7358752B2 - 複合材料の製造方法 - Google Patents
複合材料の製造方法 Download PDFInfo
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- JP7358752B2 JP7358752B2 JP2019045259A JP2019045259A JP7358752B2 JP 7358752 B2 JP7358752 B2 JP 7358752B2 JP 2019045259 A JP2019045259 A JP 2019045259A JP 2019045259 A JP2019045259 A JP 2019045259A JP 7358752 B2 JP7358752 B2 JP 7358752B2
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- Prior art keywords
- firing
- composite material
- conductive carbon
- temperature
- lithium
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- 238000010304 firing Methods 0.000 claims description 63
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 55
- 229910052799 carbon Inorganic materials 0.000 claims description 49
- 238000003756 stirring Methods 0.000 claims description 32
- YWJVFBOUPMWANA-UHFFFAOYSA-H [Li+].[V+5].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O Chemical group [Li+].[V+5].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O YWJVFBOUPMWANA-UHFFFAOYSA-H 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 25
- 238000001035 drying Methods 0.000 claims description 16
- 238000010298 pulverizing process Methods 0.000 claims description 16
- 239000007833 carbon precursor Substances 0.000 claims description 15
- 229910052720 vanadium Inorganic materials 0.000 claims description 15
- 239000011149 active material Substances 0.000 claims description 13
- 239000007787 solid Substances 0.000 claims description 13
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 13
- 229910001386 lithium phosphate Inorganic materials 0.000 claims description 11
- TWQULNDIKKJZPH-UHFFFAOYSA-K trilithium;phosphate Chemical compound [Li+].[Li+].[Li+].[O-]P([O-])([O-])=O TWQULNDIKKJZPH-UHFFFAOYSA-K 0.000 claims description 11
- 239000007864 aqueous solution Substances 0.000 claims description 9
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
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- 238000001354 calcination Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 32
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
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- 238000004220 aggregation Methods 0.000 description 2
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- IIPYXGDZVMZOAP-UHFFFAOYSA-N lithium nitrate Chemical compound [Li+].[O-][N+]([O-])=O IIPYXGDZVMZOAP-UHFFFAOYSA-N 0.000 description 2
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- ILXAVRFGLBYNEJ-UHFFFAOYSA-K lithium;manganese(2+);phosphate Chemical compound [Li+].[Mn+2].[O-]P([O-])([O-])=O ILXAVRFGLBYNEJ-UHFFFAOYSA-K 0.000 description 2
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- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 description 2
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- VEPOHXYIFQMVHW-XOZOLZJESA-N 2,3-dihydroxybutanedioic acid (2S,3S)-3,4-dimethyl-2-phenylmorpholine Chemical compound OC(C(O)C(O)=O)C(O)=O.C[C@H]1[C@@H](OCCN1C)c1ccccc1 VEPOHXYIFQMVHW-XOZOLZJESA-N 0.000 description 1
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- 239000011593 sulfur Substances 0.000 description 1
- 239000011269 tar Substances 0.000 description 1
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 1
- 239000006234 thermal black Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- LLZRNZOLAXHGLL-UHFFFAOYSA-J titanic acid Chemical compound O[Ti](O)(O)O LLZRNZOLAXHGLL-UHFFFAOYSA-J 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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- 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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Description
本実施形態に係る複合材料の製造方法により得た複合材料100は、リン酸バナジウムリチウムと導電性カーボンを含有する複合材料である。
図2に、本実施形態に係る複合材料100の製造方法のフローチャート図の一例を示す。
以下、本発明の実施例を説明するが、本発明は、これらの実施例になんら限定されるものではない。
―撹拌工程―
5Lビーカーに蒸留水3.7Lを入れ、これに炭酸リチウム(富士フイルム和光純薬製)261gとリン酸(富士フイルム和光純薬製)816gを投入し、室温(25℃)で撹拌することにより、リン酸リチウム水溶液を得た。ここに、五酸化バナジウム(太陽鉱工製)432gとスクロース(富士フイルム和光純薬製)246gを加え80℃で撹拌し、沈殿生成反応を行い、固形物を含む反応液を得た。
反応液を冷却後、湿式粉砕装置(LMZ015、アシザワ・ファインテック製)に直径0.5mmのジルコニアボールを仕込み、反応液中の粉砕処理物のメジアン径が0.7μm以下になるまでビーズミルにより粉砕処理を行って、一次材料101を含む分散スラリーを得た。
熱風入り口の温度を150℃に設定した噴霧乾燥装置に、分散スラリーを供給し、二次材料102を得た。
得られた二次材料をアルミナ製匣鉢に入れ、窒素(不活性ガス)雰囲気下で25℃から300℃まで昇温速度100℃・h-1で昇温し、300℃で2時間、予備焼成した。次いで同条件下で300℃から900℃まで昇温速度600℃・h-1で昇温し、900℃で2時間、焼成し複合材料を得た。得られた複合材料の真密度は3.07g・cm-3であった。
―撹拌工程―
5Lビーカーに蒸留水3.7Lを入れ、これに炭酸リチウム(富士フイルム和光純薬製)261gとリン酸(富士フイルム和光純薬製)816gを投入し、室温(25℃)で撹拌することにより、リン酸リチウム水溶液を得た。ここに、五酸化バナジウム(太陽鉱工製)432gとスクロース(富士フイルム和光純薬製)246gを加え80℃で撹拌し、沈殿生成反応を行い、固形物を含む反応液を得た。
反応液を冷却後、湿式粉砕装置(LMZ015、アシザワ・ファインテック製)に直径0.5mmのジルコニアボールを仕込み、反応液中の粉砕処理物のメジアン径が0.7μm以下になるまでビーズミルにより粉砕処理を行って、一次材料101を含む分散スラリーを得た。
熱風入り口の温度を150℃に設定した噴霧乾燥装置に、分散スラリーを供給し、二次材料102を得た。
得られた二次材料をアルミナ製匣鉢に入れ、窒素(不活性ガス)雰囲気下で25℃から900℃まで昇温速度600℃・h-1で昇温し、900℃で2時間、焼成し複合材料を得た。得られた複合材料の真密度は2.94g・cm-3であった。
101 一次材料
102 二次材料
103 導電性カーボン
104 リン酸バナジウムリチウム
Claims (6)
- リン酸バナジウムリチウムである活物質と導電性カーボンを含有する複合材料の製造方法であって、
リン酸リチウム水溶液にバナジウム源と、導電性カーボンまたは導電性カーボン前駆体と、を加え攪拌する撹拌工程と、
前記撹拌工程による成果物に粉砕処理を施し、粉砕処理物を得る粉砕工程と、
前記粉砕工程で得た前記粉砕処理物をスプレードライにより乾燥する乾燥工程と、
前記乾燥工程による成果物を焼成する焼成工程と、を有し、
前記焼成工程は、第一温度で予備焼成を行った後に、前記第一温度以上の第二温度で焼成を行う二段階焼成を含む、
ことを特徴とする複合材料の製造方法。 - 前記焼成工程における前記予備焼成の焼成温度は100℃以上500℃以下である
ことを特徴とする請求項1に記載の複合材料の製造方法。 - 前記焼成工程における前記予備焼成の昇温速度は、前記予備焼成の焼成温度をTとしたときに、T/4℃・h-1以上2T℃・h-1以下である
ことを特徴とする請求項1または2に記載の複合材料の製造方法。 - 前記乾燥工程における前記粉砕処理物の固形分濃度は15質量パーセント以上30質量パーセント以下である
ことを特徴とする請求項1乃至3の何れか一項に記載の複合材料の製造方法。 - 前記撹拌工程における溶媒は水を主成分とした水性溶媒である
ことを特徴とする請求項1乃至4の何れか一項に記載の複合材料の製造方法。 - リン酸リチウム水溶液にバナジウム源と、導電性カーボンまたは導電性カーボン前駆体と、を加え攪拌し、
前記攪拌による成果物に粉砕処理を施し、粉砕処理物を得て、前記粉砕処理物にスプレードライにより乾燥処理を施し、乾燥処理物を得る工程を含む、
活物質と前記導電性カーボンを含有する複合材料の製造方法であって
前記乾燥処理物を第一温度で予備焼成を行った後に、前記第一温度以上の第二温度で焼成を行う二段階焼成を行う
ことを特徴とする複合材料の製造方法。
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