JP6739810B2 - 水系レドックスフロー電池用有機系正極活物質 - Google Patents
水系レドックスフロー電池用有機系正極活物質 Download PDFInfo
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- 239000007774 positive electrode material Substances 0.000 title claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 20
- 239000008151 electrolyte solution Substances 0.000 claims description 49
- 239000003792 electrolyte Substances 0.000 claims description 37
- 229910052720 vanadium Inorganic materials 0.000 claims description 27
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 23
- 239000000126 substance Substances 0.000 claims description 17
- PLIKAWJENQZMHA-UHFFFAOYSA-N 4-aminophenol Chemical compound NC1=CC=C(O)C=C1 PLIKAWJENQZMHA-UHFFFAOYSA-N 0.000 claims description 16
- 239000002904 solvent Substances 0.000 claims description 10
- 239000003125 aqueous solvent Substances 0.000 claims description 9
- 150000001875 compounds Chemical class 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 7
- -1 NH 2 Inorganic materials 0.000 claims description 6
- 150000001768 cations Chemical class 0.000 claims description 6
- 239000003014 ion exchange membrane Substances 0.000 claims description 6
- 229910052736 halogen Inorganic materials 0.000 claims description 5
- 239000007772 electrode material Substances 0.000 claims description 4
- 229910052731 fluorine Inorganic materials 0.000 claims description 4
- 150000002367 halogens Chemical class 0.000 claims description 4
- IQUPABOKLQSFBK-UHFFFAOYSA-N 2-nitrophenol Chemical compound OC1=CC=CC=C1[N+]([O-])=O IQUPABOKLQSFBK-UHFFFAOYSA-N 0.000 claims description 2
- 229910052794 bromium Inorganic materials 0.000 claims description 2
- 229910052801 chlorine Inorganic materials 0.000 claims description 2
- 229910052740 iodine Inorganic materials 0.000 claims description 2
- 125000005843 halogen group Chemical group 0.000 claims 1
- 229920000642 polymer Polymers 0.000 description 28
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 14
- 239000011149 active material Substances 0.000 description 14
- 239000007864 aqueous solution Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- 238000002484 cyclic voltammetry Methods 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 5
- 239000011734 sodium Substances 0.000 description 5
- 150000003681 vanadium Chemical class 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000006479 redox reaction Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000006722 reduction reaction Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910001456 vanadium ion Inorganic materials 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000004693 Polybenzimidazole Substances 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 229920005603 alternating copolymer Polymers 0.000 description 2
- 229920001400 block copolymer Polymers 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 229910021397 glassy carbon Inorganic materials 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229920001643 poly(ether ketone) Polymers 0.000 description 2
- 229920002627 poly(phosphazenes) Polymers 0.000 description 2
- 229920002480 polybenzimidazole Polymers 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 229920005604 random copolymer Polymers 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- VLOPEOIIELCUML-UHFFFAOYSA-L vanadium(2+);sulfate Chemical compound [V+2].[O-]S([O-])(=O)=O VLOPEOIIELCUML-UHFFFAOYSA-L 0.000 description 2
- MFWFDRBPQDXFRC-LNTINUHCSA-N (z)-4-hydroxypent-3-en-2-one;vanadium Chemical compound [V].C\C(O)=C\C(C)=O.C\C(O)=C\C(C)=O.C\C(O)=C\C(C)=O MFWFDRBPQDXFRC-LNTINUHCSA-N 0.000 description 1
- BWLBGMIXKSTLSX-UHFFFAOYSA-N 2-hydroxyisobutyric acid Chemical compound CC(C)(O)C(O)=O BWLBGMIXKSTLSX-UHFFFAOYSA-N 0.000 description 1
- XKIWZZJNBVOFIE-UHFFFAOYSA-N 4-aminophenol Chemical compound NC1=CC=C(O)C=C1.NC1=CC=C(O)C=C1 XKIWZZJNBVOFIE-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229920006275 Ketone-based polymer Polymers 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 229920000557 Nafion® Polymers 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 description 1
- ZMFKXOMVFFKPEC-UHFFFAOYSA-D [V+5].[V+5].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O Chemical compound [V+5].[V+5].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZMFKXOMVFFKPEC-UHFFFAOYSA-D 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000008365 aromatic ketones Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000006182 cathode active material Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007850 degeneration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- CRFFKOZWRYKDEG-UHFFFAOYSA-N fluoro hypofluorite vanadium Chemical compound [V].FOF CRFFKOZWRYKDEG-UHFFFAOYSA-N 0.000 description 1
- UQSQSQZYBQSBJZ-UHFFFAOYSA-N fluorosulfonic acid Chemical compound OS(F)(=O)=O UQSQSQZYBQSBJZ-UHFFFAOYSA-N 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229920000578 graft copolymer Polymers 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hcl hcl Chemical compound Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 229920006030 multiblock copolymer Polymers 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- BQTGDGVUGBFFNW-UHFFFAOYSA-L oxygen(2-);vanadium(4+);sulfate;hydrate Chemical compound O.[O-2].[V+4].[O-]S([O-])(=O)=O BQTGDGVUGBFFNW-UHFFFAOYSA-L 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 229940085991 phosphate ion Drugs 0.000 description 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
- 229920001467 poly(styrenesulfonates) Polymers 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920000412 polyarylene Polymers 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 229920013637 polyphenylene oxide polymer Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 229920006159 sulfonated polyamide Polymers 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
- H01M8/184—Regeneration by electrochemical means
- H01M8/188—Regeneration by electrochemical means by recharging of redox couples containing fluids; Redox flow type batteries
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C205/00—Compounds containing nitro groups bound to a carbon skeleton
- C07C205/13—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by hydroxy groups
- C07C205/20—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by hydroxy groups having nitro groups and hydroxy groups bound to carbon atoms of six-membered aromatic rings
- C07C205/21—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by hydroxy groups having nitro groups and hydroxy groups bound to carbon atoms of six-membered aromatic rings having nitro groups and hydroxy groups bound to carbon atoms of the same non-condensed six-membered aromatic ring
- C07C205/22—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by hydroxy groups having nitro groups and hydroxy groups bound to carbon atoms of six-membered aromatic rings having nitro groups and hydroxy groups bound to carbon atoms of the same non-condensed six-membered aromatic ring having one nitro groups bound to the ring
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C215/00—Compounds containing amino and hydroxy groups bound to the same carbon skeleton
- C07C215/74—Compounds containing amino and hydroxy groups bound to the same carbon skeleton having hydroxy groups and amino groups bound to carbon atoms of six-membered aromatic rings of the same carbon skeleton
- C07C215/76—Compounds containing amino and hydroxy groups bound to the same carbon skeleton having hydroxy groups and amino groups bound to carbon atoms of six-membered aromatic rings of the same carbon skeleton of the same non-condensed six-membered aromatic ring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/368—Liquid depolarisers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/60—Selection of substances as active materials, active masses, active liquids of organic compounds
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/08—Fuel cells with aqueous electrolytes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/20—Indirect fuel cells, e.g. fuel cells with redox couple being irreversible
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/028—Positive electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0002—Aqueous electrolytes
-
- 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
-
- 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
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
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- Engineering & Computer Science (AREA)
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- Sustainable Energy (AREA)
- Fuel Cell (AREA)
Description
0.4M 4−アミノフェノール(4−Amino Phenol)を3.0M H2SO4水溶液に溶解して正極電解液を製造した。
作動電極でガラス状炭素(Glassy carbon)、基準電極でAg/AgCl、相手電極で白金線(Pt wire)を利用し、上記実施例1で製造された正極電解液の酸化還元(Redox)特性を確認するための循環電圧電流法(Cyclic Voltammetry)を実施した。走査速度(Scan rate)を50〜200mV/s 内で変化させ、−0.6〜1.2V間の電圧を加える時に作動電極で測定される電流値を記録し、その結果を図1に図示した。
図1を参考すれば、循環電圧電流法(Cyclic Voltammetry)評価結果、走査速度(Scan rate)が増加するにつれ、酸化/還元電流ピーク(Peak)もさらに大きい値を有することを確認し、還元時のピーク(Peak)が2個観察され、2e−反応であることがはっきり見えることが分かる。このような結果は、酸性水溶液中で可逆的(Reversible)酸化還元(Redox)反応が可能であることを示す。
5×5cm2のカーボンフェルト(Carbon Felt)、バイポーラープレート(Bipolar plate)、金集電体(Gold Current collector)を利用して正極と負極を製造し、イオン交換膜としてはナフィオン(Nafion 115)を使用した。
正極電解液は、1.0M VOSO4を3.0M H2SO4水溶液に溶解して製造し、負極電解液は、この正極電解液をイオン分離して3価バナジウム(V3+)を得たものを使用し、それ以外には実施例1と同様の方法でレドックスフロー電池を製作して、電解液を循環させた。
上記実施例1で製作されたレドックスフロー電池の充/放電駆動可能性を評価するために、0.1〜1.4V間の電圧範囲で±100mAで充/放電を行い、時間別の充/放電電圧を図3に図示した。
図3は、充/放電を始めてから16回〜20回目サイクルの電圧変化を示すグラフであって、充/放電回数が増加するにもかかわらず、以前同様の電圧、同一の時間で再充電と再放電が可能であったことを示す。すなわち、電極表面で電解液の酸化/還元反応が可逆的であることが分かる。したがって、4−アミノフェノールを正極電解液で使用した単電池が充電と放電挙動が可能ということと、単電池の作動電圧領域が分かる。
上記製作された実施例1と比較例1におけるレドックスフロー電池の発現容量と電流効率を測定した。電流効率は、充電された電荷量に対して放電された電荷量の割合で電池の可逆度合いが分かる指標であり、電流効率が100%に近いほど、素材の非可逆的な変化なしに安定的に充/放電されることを意味する。したがって、この効率は、電池の寿命を間接的に判断することができる重要な電池評価値であり、その結果を発現容量と一緒に表1及び図4に示す。ただし、実施例1と比較例1のレドックスフロー電池は、同じ素材と面積を有するように締結されたが、作動電圧範囲は、電解液の差によってそれぞれ0.4〜1.2V、0.8〜1.7Vと異なって駆動された。
上記表1と図4で確認されるように、電流効率は、比較例1のバナジウムレドックスフロー電池の電流効率である96.2及び97.0に比べて実施例1の電池の電流効率は91.6及び93.1と測定され、これによって実施例1の正極電解液が通常のバナジウム電池の正極電解液に代替できる水準であることを確認した。
Claims (9)
- 下記化学式1で表される化合物を含む水系レドックスフロー電池用有機系正極活物質:
- 上記ハロゲン元素は、F、Cl、BrまたはIであることを特徴とする、請求項1に記載の水系レドックスフロー電池用有機系正極活物質。
- 上記R1は、NH2、NO2、またはClで、
上記R2ないしR5は、Hであることを特徴とする、請求項1に記載の水系レドックスフロー電池用有機系正極活物質。 - 化学式1で表される化合物は、パラ−アミノフェノール(Para−aminophenol)またはニトロフェノール(Nitrophenol)であることを特徴とする、請求項1に記載の水系レドックスフロー電池用有機系正極活物質。
- 請求項1ないし4のいずれか一項に記載の正極活物質;及び水系溶媒;を含む、水系レドックスフロー電池用正極電解液。
- 上記正極活物質は、0.01ないし5M濃度で含まれることを特徴とする、請求項5に記載の水系レドックスフロー電池用正極電解液。
- 上記水系溶媒は、H2SO4、K2SO4、Na2SO4、H3PO4、H4P2O7、K2HPO4、Na3PO4、K3PO4、HNO3、KNO3、NaNO3及びこれらの組み合わせから選択される1種以上を含むことを特徴とする、請求項5に記載の水系レドックスフロー電池用正極電解液。
- 正極及び正極電解液を含む正極セル;
負極及び負極電解液を含む負極セル;
上記正極セルと上記負極セルの間に位するイオン交換膜;及び
ポンプの駆動によって上記正極セルに正極電解液を供給するための正極電解液が貯蔵された正極電解液タンク、ポンプの駆動によって上記負極セルに負極電解液を供給するための負極電解液が貯蔵された負極電解液タンクを含んで充/放電が行われるレドックスフロー電池において、
上記正極電解液及び負極電解液は、電極活物質及び水系溶媒を含み、
この時、上記正極電解液に含まれる正極活物質は、請求項1ないし4のいずれか一項に記載の正極活物質であることを特徴とする、レドックスフロー電池。 - 上記負極電解液は、バナジウム2価陽イオン(V2+)とバナジウム3価陽イオン(V3+)を含むことを特徴とする、請求項8に記載のレドックスフロー電池。
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PCT/KR2017/010427 WO2018056732A2 (ko) | 2016-09-22 | 2017-09-22 | 수계 레독스 플로우 전지용 유기계 양극 활물질 |
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