JP2022542591A - リチウム-硫黄電池用電解質及びこれを含むリチウム-硫黄電池 - Google Patents
リチウム-硫黄電池用電解質及びこれを含むリチウム-硫黄電池 Download PDFInfo
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- JP2022542591A JP2022542591A JP2022505497A JP2022505497A JP2022542591A JP 2022542591 A JP2022542591 A JP 2022542591A JP 2022505497 A JP2022505497 A JP 2022505497A JP 2022505497 A JP2022505497 A JP 2022505497A JP 2022542591 A JP2022542591 A JP 2022542591A
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- Prior art keywords
- lithium
- sulfur
- electrolyte
- ether
- sulfur battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- JDZCKJOXGCMJGS-UHFFFAOYSA-N [Li].[S] Chemical compound [Li].[S] JDZCKJOXGCMJGS-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 239000003792 electrolyte Substances 0.000 title claims abstract description 82
- -1 sulfide compound Chemical class 0.000 claims abstract description 56
- 239000000654 additive Substances 0.000 claims abstract description 30
- 230000000996 additive effect Effects 0.000 claims abstract description 26
- 229910003002 lithium salt Inorganic materials 0.000 claims abstract description 15
- 159000000002 lithium salts Chemical class 0.000 claims abstract description 15
- 239000011356 non-aqueous organic solvent Substances 0.000 claims abstract description 15
- 229910052744 lithium Inorganic materials 0.000 claims description 81
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 41
- 239000007774 positive electrode material Substances 0.000 claims description 41
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 40
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 34
- 229910052717 sulfur Inorganic materials 0.000 claims description 33
- 239000011593 sulfur Substances 0.000 claims description 32
- VQKFNUFAXTZWDK-UHFFFAOYSA-N 2-Methylfuran Chemical compound CC1=CC=CO1 VQKFNUFAXTZWDK-UHFFFAOYSA-N 0.000 claims description 28
- 150000002391 heterocyclic compounds Chemical class 0.000 claims description 21
- LUFPJJNWMYZRQE-UHFFFAOYSA-N benzylsulfanylmethylbenzene Chemical compound C=1C=CC=CC=1CSCC1=CC=CC=C1 LUFPJJNWMYZRQE-UHFFFAOYSA-N 0.000 claims description 19
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 claims description 16
- 150000001875 compounds Chemical class 0.000 claims description 16
- ZERULLAPCVRMCO-UHFFFAOYSA-N Dipropyl sulfide Chemical compound CCCSCCC ZERULLAPCVRMCO-UHFFFAOYSA-N 0.000 claims description 14
- 239000007773 negative electrode material Substances 0.000 claims description 14
- 125000004432 carbon atom Chemical group C* 0.000 claims description 8
- LJSQFQKUNVCTIA-UHFFFAOYSA-N diethyl sulfide Chemical compound CCSCC LJSQFQKUNVCTIA-UHFFFAOYSA-N 0.000 claims description 7
- DHKHKXVYLBGOIT-UHFFFAOYSA-N 1,1-Diethoxyethane Chemical compound CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 claims description 6
- KJRRQXYWFQKJIP-UHFFFAOYSA-N 3-methylfuran Chemical compound CC=1C=COC=1 KJRRQXYWFQKJIP-UHFFFAOYSA-N 0.000 claims description 6
- OFQPKKGMNWASPN-UHFFFAOYSA-N Benzyl methyl sulfide Chemical compound CSCC1=CC=CC=C1 OFQPKKGMNWASPN-UHFFFAOYSA-N 0.000 claims description 6
- GSNUFIFRDBKVIE-UHFFFAOYSA-N DMF Natural products CC1=CC=C(C)O1 GSNUFIFRDBKVIE-UHFFFAOYSA-N 0.000 claims description 6
- XYWDPYKBIRQXQS-UHFFFAOYSA-N Diisopropyl sulfide Chemical compound CC(C)SC(C)C XYWDPYKBIRQXQS-UHFFFAOYSA-N 0.000 claims description 6
- 239000002202 Polyethylene glycol Substances 0.000 claims description 6
- 239000006182 cathode active material Substances 0.000 claims description 6
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims description 6
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 claims description 6
- 229920001223 polyethylene glycol Polymers 0.000 claims description 6
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 5
- 229910018091 Li 2 S Inorganic materials 0.000 claims description 5
- 150000002170 ethers Chemical class 0.000 claims description 5
- CPULIKNSOUFMPL-UHFFFAOYSA-N 2,4-dimethylthiophene Chemical compound CC1=CSC(C)=C1 CPULIKNSOUFMPL-UHFFFAOYSA-N 0.000 claims description 4
- GWQOOADXMVQEFT-UHFFFAOYSA-N 2,5-Dimethylthiophene Chemical compound CC1=CC=C(C)S1 GWQOOADXMVQEFT-UHFFFAOYSA-N 0.000 claims description 4
- CPLJMYOQYRCCBY-UHFFFAOYSA-N 2-Propylfuran Chemical compound CCCC1=CC=CO1 CPLJMYOQYRCCBY-UHFFFAOYSA-N 0.000 claims description 4
- NWZIYQNUCXUJJJ-UHFFFAOYSA-N 2-butylfuran Chemical compound CCCCC1=CC=CO1 NWZIYQNUCXUJJJ-UHFFFAOYSA-N 0.000 claims description 4
- HLPIHRDZBHXTFJ-UHFFFAOYSA-N 2-ethylfuran Chemical compound CCC1=CC=CO1 HLPIHRDZBHXTFJ-UHFFFAOYSA-N 0.000 claims description 4
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 claims description 4
- 229910000733 Li alloy Inorganic materials 0.000 claims description 4
- XOBKSJJDNFUZPF-UHFFFAOYSA-N Methoxyethane Chemical compound CCOC XOBKSJJDNFUZPF-UHFFFAOYSA-N 0.000 claims description 4
- YTPLMLYBLZKORZ-UHFFFAOYSA-N Thiophene Chemical compound C=1C=CSC=1 YTPLMLYBLZKORZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000001989 lithium alloy Substances 0.000 claims description 4
- 125000004430 oxygen atom Chemical group O* 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 125000004434 sulfur atom Chemical group 0.000 claims description 4
- 150000003464 sulfur compounds Chemical class 0.000 claims description 4
- ZUHZGEOKBKGPSW-UHFFFAOYSA-N tetraglyme Chemical compound COCCOCCOCCOCCOC ZUHZGEOKBKGPSW-UHFFFAOYSA-N 0.000 claims description 4
- XQQBUAPQHNYYRS-UHFFFAOYSA-N 2-methylthiophene Chemical compound CC1=CC=CS1 XQQBUAPQHNYYRS-UHFFFAOYSA-N 0.000 claims description 3
- 229910001558 CF3SO3Li Inorganic materials 0.000 claims description 3
- HTIRHQRTDBPHNZ-UHFFFAOYSA-N Dibutyl sulfide Chemical compound CCCCSCCCC HTIRHQRTDBPHNZ-UHFFFAOYSA-N 0.000 claims description 3
- QMMFVYPAHWMCMS-UHFFFAOYSA-N Dimethyl sulfide Chemical compound CSC QMMFVYPAHWMCMS-UHFFFAOYSA-N 0.000 claims description 3
- 229910003253 LiB10Cl10 Inorganic materials 0.000 claims description 3
- 229910000552 LiCF3SO3 Inorganic materials 0.000 claims description 3
- 229910001290 LiPF6 Inorganic materials 0.000 claims description 3
- QENGPZGAWFQWCZ-UHFFFAOYSA-N Methylthiophene Natural products CC=1C=CSC=1 QENGPZGAWFQWCZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910006095 SO2F Inorganic materials 0.000 claims description 3
- LTYMSROWYAPPGB-UHFFFAOYSA-N diphenyl sulfide Chemical compound C=1C=CC=CC=1SC1=CC=CC=C1 LTYMSROWYAPPGB-UHFFFAOYSA-N 0.000 claims description 3
- AEHWKBXBXYNPCX-UHFFFAOYSA-N ethylsulfanylbenzene Chemical compound CCSC1=CC=CC=C1 AEHWKBXBXYNPCX-UHFFFAOYSA-N 0.000 claims description 3
- 125000005842 heteroatom Chemical group 0.000 claims description 3
- 229910001547 lithium hexafluoroantimonate(V) Inorganic materials 0.000 claims description 3
- 229910001540 lithium hexafluoroarsenate(V) Inorganic materials 0.000 claims description 3
- HSZCZNFXUDYRKD-UHFFFAOYSA-M lithium iodide Inorganic materials [Li+].[I-] HSZCZNFXUDYRKD-UHFFFAOYSA-M 0.000 claims description 3
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 claims description 3
- 229910001486 lithium perchlorate Inorganic materials 0.000 claims description 3
- 229910001537 lithium tetrachloroaluminate Inorganic materials 0.000 claims description 3
- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 claims description 3
- HSFDLPWPRRSVSM-UHFFFAOYSA-M lithium;2,2,2-trifluoroacetate Chemical compound [Li+].[O-]C(=O)C(F)(F)F HSFDLPWPRRSVSM-UHFFFAOYSA-M 0.000 claims description 3
- JRRDISHSXWGFRF-UHFFFAOYSA-N 1-[2-(2-ethoxyethoxy)ethoxy]-2-methoxyethane Chemical compound CCOCCOCCOCCOC JRRDISHSXWGFRF-UHFFFAOYSA-N 0.000 claims description 2
- YZWVMKLQNYGKLJ-UHFFFAOYSA-N 1-[2-[2-(2-ethoxyethoxy)ethoxy]ethoxy]-2-methoxyethane Chemical compound CCOCCOCCOCCOCCOC YZWVMKLQNYGKLJ-UHFFFAOYSA-N 0.000 claims description 2
- RRQYJINTUHWNHW-UHFFFAOYSA-N 1-ethoxy-2-(2-ethoxyethoxy)ethane Chemical compound CCOCCOCCOCC RRQYJINTUHWNHW-UHFFFAOYSA-N 0.000 claims description 2
- CNJRPYFBORAQAU-UHFFFAOYSA-N 1-ethoxy-2-(2-methoxyethoxy)ethane Chemical compound CCOCCOCCOC CNJRPYFBORAQAU-UHFFFAOYSA-N 0.000 claims description 2
- KIAMPLQEZAMORJ-UHFFFAOYSA-N 1-ethoxy-2-[2-(2-ethoxyethoxy)ethoxy]ethane Chemical compound CCOCCOCCOCCOCC KIAMPLQEZAMORJ-UHFFFAOYSA-N 0.000 claims description 2
- CAQYAZNFWDDMIT-UHFFFAOYSA-N 1-ethoxy-2-methoxyethane Chemical compound CCOCCOC CAQYAZNFWDDMIT-UHFFFAOYSA-N 0.000 claims description 2
- NVJUHMXYKCUMQA-UHFFFAOYSA-N 1-ethoxypropane Chemical compound CCCOCC NVJUHMXYKCUMQA-UHFFFAOYSA-N 0.000 claims description 2
- FJSKXQVRKZTKSI-UHFFFAOYSA-N 2,3-dimethylfuran Chemical compound CC=1C=COC=1C FJSKXQVRKZTKSI-UHFFFAOYSA-N 0.000 claims description 2
- BZYUMXXOAYSFOW-UHFFFAOYSA-N 2,3-dimethylthiophene Chemical compound CC=1C=CSC=1C BZYUMXXOAYSFOW-UHFFFAOYSA-N 0.000 claims description 2
- AABTWRKUKUPMJG-UHFFFAOYSA-N 2,4-dimethylfuran Chemical compound CC1=COC(C)=C1 AABTWRKUKUPMJG-UHFFFAOYSA-N 0.000 claims description 2
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- WVUICGOYGDHVBH-ONEGZZNKSA-N 2-[(e)-2-nitroethenyl]furan Chemical compound [O-][N+](=O)\C=C\C1=CC=CO1 WVUICGOYGDHVBH-ONEGZZNKSA-N 0.000 claims description 2
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- SCRLLDUEKYMHDB-UHFFFAOYSA-N 3-methylpyran Chemical compound CC1=CO[CH][CH][CH]1 SCRLLDUEKYMHDB-UHFFFAOYSA-N 0.000 claims description 2
- OOARNVHTYGBULA-UHFFFAOYSA-N 4-methyl-2h-pyran Chemical compound CC1=CCOC=C1 OOARNVHTYGBULA-UHFFFAOYSA-N 0.000 claims description 2
- RFRXIWQYSOIBDI-UHFFFAOYSA-N benzarone Chemical compound CCC=1OC2=CC=CC=C2C=1C(=O)C1=CC=C(O)C=C1 RFRXIWQYSOIBDI-UHFFFAOYSA-N 0.000 claims description 2
- UOALEFQKAOQICC-UHFFFAOYSA-N chloroborane Chemical compound ClB UOALEFQKAOQICC-UHFFFAOYSA-N 0.000 claims description 2
- 229940019778 diethylene glycol diethyl ether Drugs 0.000 claims description 2
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 claims description 2
- POLCUAVZOMRGSN-UHFFFAOYSA-N dipropyl ether Chemical compound CCCOCCC POLCUAVZOMRGSN-UHFFFAOYSA-N 0.000 claims description 2
- 150000002019 disulfides Chemical class 0.000 claims description 2
- YQCIWBXEVYWRCW-UHFFFAOYSA-N methane;sulfane Chemical compound C.S YQCIWBXEVYWRCW-UHFFFAOYSA-N 0.000 claims description 2
- VNKYTQGIUYNRMY-UHFFFAOYSA-N methoxypropane Chemical compound CCCOC VNKYTQGIUYNRMY-UHFFFAOYSA-N 0.000 claims description 2
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- 235000019698 starch Nutrition 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 229910052713 technetium Inorganic materials 0.000 description 1
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 150000003573 thiols Chemical class 0.000 description 1
- 125000000464 thioxo group Chemical group S=* 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- BDZBKCUKTQZUTL-UHFFFAOYSA-N triethyl phosphite Chemical compound CCOP(OCC)OCC BDZBKCUKTQZUTL-UHFFFAOYSA-N 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 239000004034 viscosity adjusting agent Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Images
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Abstract
Description
[実施例1]
正極活物質で硫黄-炭素複合体(S:C=75:25(重量比))87.5重量%、導電材でデンカブラック5.0重量%、バインダーでスチレンブタジエンゴム/カルボキシメチルセルロース(SBR:CMC=70:30(重量比))7.5重量%を混合して正極スラリー組成物を製造した。
電解質製造の際にベンジルスルフィドの含量を0.5重量%に変更したことを除いては、上記実施例1と同様の方法でリチウム-硫黄電池を製造した。
電解質製造の際にベンジルスルフィドの含量を1.0重量%に変更したことを除いては、上記実施例1と同様の方法でリチウム-硫黄電池を製造した。
電解質製造の際にベンジルスルフィドの代わりにエチルスルフィドを同一含量で使ったことで除いては、上記実施例1と同様の方法でリチウム-硫黄電池を製造した。
電解質製造の際にベンジルスルフィド0.1重量%をエチルスルフィド0.5重量%に変更したことを除いては、上記実施例1と同様の方法でリチウム-硫黄電池を製造した。
電解質製造の際にベンジルスルフィド0.1重量%をエチルスルフィド1.0重量%に変更したことを除いては、上記実施例1と同様の方法でリチウム-硫黄電池を製造した。
電解質製造の際にベンジルスルフィドの代わりにプロピルスルフィドを同一含量で使ったことで除いては、上記実施例1と同様の方法でリチウム-硫黄電池を製造した。
電解質製造の際にベンジルスルフィド0.1重量%をプロピルスルフィド0.5重量%に変更したことを除いては、上記実施例1と同様の方法でリチウム-硫黄電池を製造した。
電解質製造の際にベンジルスルフィド0.1重量%をプロピルスルフィド1.0重量%に変更したことを除いては、上記実施例1と同様の方法でリチウム-硫黄電池を製造した。
電解質製造の際に2-メチルフランとジメトキシエタン(2-methylfuran:DME=40:60(体積比))からなる有機溶媒を使ったことを除いては、上記実施例1と同様の方法でリチウム-硫黄電池を製造した。
電解質製造の際に2-メチルフランとジメトキシエタン(2-methylfuran:DME=40:60(体積比))からなる有機溶媒を使って、ベンジルスルフィドの含量を0.5重量%に変更したことを除いては、上記実施例1と同様の方法でリチウム-硫黄電池を製造した。
電解質製造の際に2-メチルフランとジメトキシエタン(2-methylfuran:DME=40:60(体積比))からなる有機溶媒を使って、ベンジルスルフィドの含量を1.0重量%に変更したことを除いては、上記実施例1と同様の方法でリチウム-硫黄電池を製造した。
電解質製造の際にベンジルスルフィドを使わないことを除いては、上記実施例1と同様の方法でリチウム-硫黄電池を製造した。
電解質製造の際に2-メチルフランとジメトキシエタン(2-methylfuran:DME=40:60(体積比))からなる有機溶媒を使って、ベンジルスルフィドを使わないことを除いては、上記実施例1と同様の方法でリチウム-硫黄電池を製造した。
実施例3と比較例1で製造した電解質の電気化学的反応性をサイクリックボルタンメトリー(cyclic voltammetry;CV)を利用して評価した。
(1)容量特性測定
実施例及び比較例で製造した電池に対して、充放電測定装置(LAND CT-2001A、武漢(Wuhan)社製品)を使って容量特性を評価した。
実施例1ないし3及び比較例1で製造した電池に対して、充放電測定装置(LAND CT-2001A、武漢(Wuhan)社製品)を使って寿命特性を評価した。
Claims (14)
- リチウム塩、非水系有機溶媒及び添加剤を含み、
前記添加剤はスルフィド化合物を含む、リチウム-硫黄電池用電解質。 - 前記スルフィド化合物は、メチルスルフィド、エチルスルフィド、プロピルスルフィド、イソプロピルスルフィド、ブチルスルフィド、フェニルスルフィド、ベンジルスルフィド、ベンジルメチルスルフィド及びエチルフェニルスルフィドからなる群から選択される1種以上を含む、請求項1に記載のリチウム-硫黄電池用電解質。
- 前記非水系有機溶媒は、エーテル系化合物及び一つ以上の二重結合を含むヘテロ環化合物を含む、請求項1に記載のリチウム-硫黄電池用電解質。
- 前記エーテル系化合物は線状エーテル化合物を含む、請求項3に記載のリチウム-硫黄電池用電解質。
- 前記線状エーテル化合物は、ジメチルエーテル、ジエチルエーテル、ジプロピルエーテル、メチルエチルエーテル、メチルプロピルエーテル、エチルプロピルエーテル、ジメトキシエタン、ジエトキシエタン、エチレングリコールエチルメチルエーテル、ジエチレングリコールジメチルエーテル、ジエチレングリコールジエチルエーテル、ジエチレングリコールメチルエチルエーテル、トリエチレングリコールジメチルエーテル、トリエチレングリコールジエチルエーテル、トリエチレングリコールメチルエチルエーテル、テトラエチレングリコールジメチルエーテル、テトラエチレングリコールジエチルエーテル、テトラエチレングリコールメチルエチルエーテル、ポリエチレングリコールジメチルエーテル、ポリエチレングリコールジエチルエーテル及びポリエチレングリコールメチルエチルエーテルからなる群から選択される1種以上を含む、請求項4に記載のリチウム-硫黄電池用電解質。
- 前記ヘテロ環化合物は、酸素原子及び硫黄原子からなる群から選択される1種以上のヘテロ原子を含む、請求項3に記載のリチウム-硫黄電池用電解質。
- 前記ヘテロ環化合物は、フラン、2-メチルフラン、3-メチルフラン、2-エチルフラン、2-プロピルフラン、2-ブチルフラン、2,3-ジメチルフラン、2,4-ジメチルフラン、2,5-ジメチルフラン、ピラン、2-メチルピラン、3-メチルピラン、4-メチルピラン、ベンゾフラン、2-(2-ニトロビニル)フラン、チオフェン、2-メチルチオフェン、2-エチルチオフェン、2-プロピルチオフェン、2-ブチルチオフェン、2,3-ジメチルチオフェン、2,4-ジメチルチオフェン及び2,5-ジメチルチオフェンからなる群から選択される1種以上を含む、請求項3に記載のリチウム-硫黄電池用電解質。
- 前記非水系有機溶媒は、エーテル系化合物とヘテロ環化合物を95:5ないし5:95の体積比で含む、請求項3から7のいずれか一項に記載のリチウム-硫黄電池用電解質。
- 前記リチウム塩は、LiCl、LiBr、LiI、LiClO4、LiBF4、LiB10Cl10、LiPF6、LiCF3SO3、LiCF3CO2、LiC4BO8、LiAsF6、LiSbF6、LiAlCl4、CH3SO3Li、CF3SO3Li、(CF3SO2)2NLi、(C2F5SO2)2NLi、(SO2F)2NLi、(CF3SO2)3CLi、クロロボランリチウム、炭素数4以下の低級脂肪族カルホン酸リチウム、テトラフェニルホウ酸リチウム及びリチウムイミドからなる群から選択される1種以上を含む、請求項1に記載のリチウム-硫黄電池用電解質。
- 前記添加剤は、リチウム-硫黄電池用電解質全体100重量%を基準にして0.1ないし30重量%で含まれる、請求項1に記載のリチウム-硫黄電池用電解質。
- 正極活物質を含む正極;
負極活物質を含む負極;及び
請求項1に記載の電解質を含むリチウム-硫黄電池。 - 前記正極活物質は、硫黄元素及び硫黄化合物からなる群から選択される1種以上を含む、請求項11に記載のリチウム-硫黄電池。
- 前記正極活物質は、無機硫黄、Li2Sn(n≧1)、ジスルフィド化合物、有機硫黄化合物及び炭素-硫黄ポリマー((C2Sx)n、x=2.5ないし50、n≧2)からなる群から選択される1種以上を含む、請求項11に記載のリチウム-硫黄電池。
- 前記負極活物質はリチウム金属及びリチウム合金からなる群から選択される1種以上を含む、請求項11に記載のリチウム-硫黄電池。
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US20220376300A1 (en) | 2022-11-24 |
CN114097122A (zh) | 2022-02-25 |
WO2021177723A1 (ko) | 2021-09-10 |
JP7353459B2 (ja) | 2023-09-29 |
EP3985776A4 (en) | 2022-09-14 |
EP3985776A1 (en) | 2022-04-20 |
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