JP2023528055A - リチウム二次電池 - Google Patents
リチウム二次電池 Download PDFInfo
- Publication number
- JP2023528055A JP2023528055A JP2022574603A JP2022574603A JP2023528055A JP 2023528055 A JP2023528055 A JP 2023528055A JP 2022574603 A JP2022574603 A JP 2022574603A JP 2022574603 A JP2022574603 A JP 2022574603A JP 2023528055 A JP2023528055 A JP 2023528055A
- Authority
- JP
- Japan
- Prior art keywords
- lithium
- ether
- positive electrode
- secondary battery
- sulfur
- 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.)
- Granted
Links
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 131
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 99
- 229910052714 tellurium Inorganic materials 0.000 claims abstract description 47
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 claims abstract description 47
- KGPPDNUWZNWPSI-UHFFFAOYSA-N flurotyl Chemical compound FC(F)(F)COCC(F)(F)F KGPPDNUWZNWPSI-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000000654 additive Substances 0.000 claims abstract description 22
- 230000000996 additive effect Effects 0.000 claims abstract description 19
- 239000002000 Electrolyte additive Substances 0.000 claims abstract description 18
- JDZCKJOXGCMJGS-UHFFFAOYSA-N [Li].[S] Chemical group [Li].[S] JDZCKJOXGCMJGS-UHFFFAOYSA-N 0.000 claims description 69
- 239000007774 positive electrode material Substances 0.000 claims description 58
- 239000003792 electrolyte Substances 0.000 claims description 48
- -1 acyclic ethers Chemical class 0.000 claims description 47
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 32
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 claims description 24
- VQKFNUFAXTZWDK-UHFFFAOYSA-N 2-Methylfuran Chemical compound CC1=CC=CO1 VQKFNUFAXTZWDK-UHFFFAOYSA-N 0.000 claims description 20
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 17
- 239000003960 organic solvent Substances 0.000 claims description 16
- 229910003002 lithium salt Inorganic materials 0.000 claims description 14
- 159000000002 lithium salts Chemical class 0.000 claims description 14
- GSNUFIFRDBKVIE-UHFFFAOYSA-N DMF Natural products CC1=CC=C(C)O1 GSNUFIFRDBKVIE-UHFFFAOYSA-N 0.000 claims description 9
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 9
- 150000004292 cyclic ethers Chemical class 0.000 claims description 9
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 claims description 8
- DHKHKXVYLBGOIT-UHFFFAOYSA-N 1,1-Diethoxyethane Chemical compound CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 claims description 6
- DPZNOMCNRMUKPS-UHFFFAOYSA-N 1,3-Dimethoxybenzene Chemical compound COC1=CC=CC(OC)=C1 DPZNOMCNRMUKPS-UHFFFAOYSA-N 0.000 claims description 6
- OHBQPCCCRFSCAX-UHFFFAOYSA-N 1,4-Dimethoxybenzene Chemical compound COC1=CC=C(OC)C=C1 OHBQPCCCRFSCAX-UHFFFAOYSA-N 0.000 claims description 6
- CAQYAZNFWDDMIT-UHFFFAOYSA-N 1-ethoxy-2-methoxyethane Chemical compound CCOCCOC CAQYAZNFWDDMIT-UHFFFAOYSA-N 0.000 claims description 6
- OXMIDRBAFOEOQT-UHFFFAOYSA-N 2,5-dimethyloxolane Chemical compound CC1CCC(C)O1 OXMIDRBAFOEOQT-UHFFFAOYSA-N 0.000 claims description 6
- CPLJMYOQYRCCBY-UHFFFAOYSA-N 2-Propylfuran Chemical compound CCCC1=CC=CO1 CPLJMYOQYRCCBY-UHFFFAOYSA-N 0.000 claims description 6
- NWZIYQNUCXUJJJ-UHFFFAOYSA-N 2-butylfuran Chemical compound CCCCC1=CC=CO1 NWZIYQNUCXUJJJ-UHFFFAOYSA-N 0.000 claims description 6
- HLPIHRDZBHXTFJ-UHFFFAOYSA-N 2-ethylfuran Chemical compound CCC1=CC=CO1 HLPIHRDZBHXTFJ-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
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 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
- 150000003464 sulfur compounds Chemical class 0.000 claims description 6
- ZUHZGEOKBKGPSW-UHFFFAOYSA-N tetraglyme Chemical compound COCCOCCOCCOCCOC ZUHZGEOKBKGPSW-UHFFFAOYSA-N 0.000 claims description 6
- ABDKAPXRBAPSQN-UHFFFAOYSA-N veratrole Chemical compound COC1=CC=CC=C1OC ABDKAPXRBAPSQN-UHFFFAOYSA-N 0.000 claims description 6
- LZDKZFUFMNSQCJ-UHFFFAOYSA-N 1,2-diethoxyethane Chemical compound CCOCCOCC LZDKZFUFMNSQCJ-UHFFFAOYSA-N 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 3
- YZWVMKLQNYGKLJ-UHFFFAOYSA-N 1-[2-[2-(2-ethoxyethoxy)ethoxy]ethoxy]-2-methoxyethane Chemical compound CCOCCOCCOCCOCCOC YZWVMKLQNYGKLJ-UHFFFAOYSA-N 0.000 claims description 3
- RRQYJINTUHWNHW-UHFFFAOYSA-N 1-ethoxy-2-(2-ethoxyethoxy)ethane Chemical compound CCOCCOCCOCC RRQYJINTUHWNHW-UHFFFAOYSA-N 0.000 claims description 3
- CNJRPYFBORAQAU-UHFFFAOYSA-N 1-ethoxy-2-(2-methoxyethoxy)ethane Chemical compound CCOCCOCCOC CNJRPYFBORAQAU-UHFFFAOYSA-N 0.000 claims description 3
- KIAMPLQEZAMORJ-UHFFFAOYSA-N 1-ethoxy-2-[2-(2-ethoxyethoxy)ethoxy]ethane Chemical compound CCOCCOCCOCCOCC KIAMPLQEZAMORJ-UHFFFAOYSA-N 0.000 claims description 3
- NVJUHMXYKCUMQA-UHFFFAOYSA-N 1-ethoxypropane Chemical compound CCCOCC NVJUHMXYKCUMQA-UHFFFAOYSA-N 0.000 claims description 3
- FJSKXQVRKZTKSI-UHFFFAOYSA-N 2,3-dimethylfuran Chemical compound CC=1C=COC=1C FJSKXQVRKZTKSI-UHFFFAOYSA-N 0.000 claims description 3
- AABTWRKUKUPMJG-UHFFFAOYSA-N 2,4-dimethylfuran Chemical compound CC1=COC(C)=C1 AABTWRKUKUPMJG-UHFFFAOYSA-N 0.000 claims description 3
- YVBAUDVGOFCUSG-UHFFFAOYSA-N 2-Pentylfuran Natural products CCCCCC1=CC=CO1 YVBAUDVGOFCUSG-UHFFFAOYSA-N 0.000 claims description 3
- 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 3
- JQYYUWHWGCJWTN-UHFFFAOYSA-N 2-ethoxyoxolane Chemical compound CCOC1CCCO1 JQYYUWHWGCJWTN-UHFFFAOYSA-N 0.000 claims description 3
- XWNTYHBAQIEAGN-UHFFFAOYSA-N 2-methyl-2h-pyran Chemical compound CC1OC=CC=C1 XWNTYHBAQIEAGN-UHFFFAOYSA-N 0.000 claims description 3
- JWUJQDFVADABEY-UHFFFAOYSA-N 2-methyltetrahydrofuran Chemical compound CC1CCCO1 JWUJQDFVADABEY-UHFFFAOYSA-N 0.000 claims description 3
- MGADZUXDNSDTHW-UHFFFAOYSA-N 2H-pyran Chemical compound C1OC=CC=C1 MGADZUXDNSDTHW-UHFFFAOYSA-N 0.000 claims description 3
- HYDWALOBQJFOMS-UHFFFAOYSA-N 3,6,9,12,15-pentaoxaheptadecane Chemical compound CCOCCOCCOCCOCCOCC HYDWALOBQJFOMS-UHFFFAOYSA-N 0.000 claims description 3
- SCRLLDUEKYMHDB-UHFFFAOYSA-N 3-methylpyran Chemical compound CC1=CO[CH][CH][CH]1 SCRLLDUEKYMHDB-UHFFFAOYSA-N 0.000 claims description 3
- OOARNVHTYGBULA-UHFFFAOYSA-N 4-methyl-2h-pyran Chemical compound CC1=CCOC=C1 OOARNVHTYGBULA-UHFFFAOYSA-N 0.000 claims description 3
- 229910015044 LiB Inorganic materials 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
- XOBKSJJDNFUZPF-UHFFFAOYSA-N Methoxyethane Chemical compound CCOC XOBKSJJDNFUZPF-UHFFFAOYSA-N 0.000 claims description 3
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- DHXVGJBLRPWPCS-UHFFFAOYSA-N Tetrahydropyran Chemical compound C1CCOCC1 DHXVGJBLRPWPCS-UHFFFAOYSA-N 0.000 claims description 3
- BEKPOUATRPPTLV-UHFFFAOYSA-N [Li].BCl Chemical compound [Li].BCl BEKPOUATRPPTLV-UHFFFAOYSA-N 0.000 claims description 3
- 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 3
- 229940019778 diethylene glycol diethyl ether Drugs 0.000 claims description 3
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 claims description 3
- POLCUAVZOMRGSN-UHFFFAOYSA-N dipropyl ether Chemical compound CCCOCCC POLCUAVZOMRGSN-UHFFFAOYSA-N 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
- ACFSQHQYDZIPRL-UHFFFAOYSA-N lithium;bis(1,1,2,2,2-pentafluoroethylsulfonyl)azanide Chemical compound [Li+].FC(F)(F)C(F)(F)S(=O)(=O)[N-]S(=O)(=O)C(F)(F)C(F)(F)F ACFSQHQYDZIPRL-UHFFFAOYSA-N 0.000 claims description 3
- MCVFFRWZNYZUIJ-UHFFFAOYSA-M lithium;trifluoromethanesulfonate Chemical compound [Li+].[O-]S(=O)(=O)C(F)(F)F MCVFFRWZNYZUIJ-UHFFFAOYSA-M 0.000 claims description 3
- VNKYTQGIUYNRMY-UHFFFAOYSA-N methoxypropane Chemical compound CCCOC VNKYTQGIUYNRMY-UHFFFAOYSA-N 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- YFNKIDBQEZZDLK-UHFFFAOYSA-N triglyme Chemical compound COCCOCCOCCOC YFNKIDBQEZZDLK-UHFFFAOYSA-N 0.000 claims description 3
- 229910012097 LiSbF Inorganic materials 0.000 claims description 2
- 125000002015 acyclic group Chemical group 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 33
- 239000011593 sulfur Substances 0.000 description 30
- 229910052717 sulfur Inorganic materials 0.000 description 30
- 208000028659 discharge Diseases 0.000 description 29
- 229920001021 polysulfide Polymers 0.000 description 28
- 239000005077 polysulfide Substances 0.000 description 28
- 150000008117 polysulfides Polymers 0.000 description 28
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- GJEAMHAFPYZYDE-UHFFFAOYSA-N [C].[S] Chemical class [C].[S] GJEAMHAFPYZYDE-UHFFFAOYSA-N 0.000 description 16
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
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- WNXJIVFYUVYPPR-UHFFFAOYSA-N 1,3-dioxolane Chemical compound C1COCO1 WNXJIVFYUVYPPR-UHFFFAOYSA-N 0.000 description 8
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
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- 239000002184 metal Substances 0.000 description 6
- 229910018091 Li 2 S Inorganic materials 0.000 description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 5
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- VDVLPSWVDYJFRW-UHFFFAOYSA-N lithium;bis(fluorosulfonyl)azanide Chemical compound [Li+].FS(=O)(=O)[N-]S(F)(=O)=O VDVLPSWVDYJFRW-UHFFFAOYSA-N 0.000 description 5
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Images
Classifications
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- 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
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Abstract
Description
本発明は、正極;負極;これらの間に介在された分離膜;及び電解液を含むリチウム二次電池であって、
前記正極は正極活物質及び正極添加剤を含み、
前記正極添加剤はテルルを含み、
前記電解液はリチウム塩、有機溶媒及び電解液添加剤を含み、
前記電解液添加剤は、ビス(2,2,2‐トリフルオロエチル)エーテルを含むリチウム二次電池を提供することを目的とする。
前記正極は正極活物質及び正極添加剤を含み、
前記正極添加剤はテルル(Tellurium、Te)を含み、
前記電解液はリチウム塩、有機溶媒及び電解液添加剤を含み、
前記電解液添加剤は、ビス(2,2,2‐トリフルオロエチル)エーテル(Bis(2,2,2‐trifluoroethyl)ether、BTFE)を含む。
実施例1.
正極活物質として硫黄‐炭素(CNT)複合体(S:C=75:25(重量比))及び3重量%のリチウム‐ポリアクリル酸(Li‐PAA)水溶液を混合して混合溶液を製造した。その後、前記混合溶液にテルル(Te)粉末を添加した。この時、硫黄‐炭素複合体、リチウム‐ポリアクリル酸の固形分及びテルルの重量比は90:5:5であった。ここで、さらに水を添加した後、混合して固形分が32重量%の正極スラリーを製造した。
硫黄‐炭素複合体、リチウム‐ポリアクリル酸の固形分及びテルルの重量比が85:5:10であることを除いては、前記実施例1と同様に実施してリチウム‐硫黄電池を製造した。
硫黄‐炭素複合体、リチウム‐ポリアクリル酸の固形分及びテルルの重量比が80:5:15であることを除いては、前記実施例1と同様に実施してリチウム‐硫黄電池を製造した。
2‐メチルフラン(2‐methylfuran、2‐MeF)、ビス(2,2,2‐トリフルオロエチル)エーテル(Bis(2,2,2‐trifluoroethyl)ether、BTFE)及び1,2‐ジメトキシエタン(1,2‐dimethoxyethane、DME)を20:25:55の体積で混合したことを除いては、前記実施例1と同様に実施してリチウム‐硫黄電池を製造した。
1,3‐ジオキソラン(1,3‐dioxolane、DOL)、ビス(2,2,2‐トリフルオロエチル)エーテル(Bis(2,2,2‐trifluoroethyl)ether、BTFE)及び1,2‐ジメトキシエタン(1,2‐dimethoxyethane、DME)を40:10:50の体積で混合したことを除いては、前記実施例1と同様に実施してリチウム‐硫黄電池を製造した。
正極活物質で硫黄‐炭素(CNT)複合体(S:C=75:25(重量比))及び3重量%のリチウム‐ポリアクリル酸(Li‐PAA)水溶液を混合して混合溶液を製造した。この時、硫黄‐炭素複合体及びリチウム‐ポリアクリル酸の固形分の重量比は95:5であった。ここで、さらに水を添加した後、混合して固形分が32重量%の正極スラリーを製造した。
0.75M LiFSIと4重量%の硝酸リチウム(LiNO3)を2‐メチルフラン(2‐methylfuran、2‐MeF)及び1,2‐ジメトキシエタン(1,2‐dimethoxyethane、DME)を1:4の体積で混合した有機溶媒に溶解させて電解液を製造したことを除いては、前記実施例1と同様に実施してリチウム‐硫黄電池を製造した。
正極活物質で硫黄‐炭素(CNT)複合体(S:C=75:25(重量比))及び3重量%のリチウム‐ポリアクリル酸(Li‐PAA)水溶液を混合して混合溶液を製造した。この時、硫黄‐炭素複合体及びリチウム‐ポリアクリル酸の固形分の重量比は95:5であった。ここで、さらに水を添加した後、混合して固形分が32重量%の正極スラリーを製造した。
実施例1ないし3及び比較例1ないし3で製造した電池に対し、充・放電測定装置(PESCO5‐0.01、PNE solution韓国)を使用して性能を評価した。
実施例1ないし3及び比較例3で製造した電池に対し、充・放電測定装置(PESCO5‐0.01、PNE solution韓国)を使用し、テルル含量による初期クーロン効率を評価した。
Claims (11)
- 正極;負極;これらの間に介在された分離膜;及び電解液を含むリチウム二次電池であって、
前記正極は正極活物質及び正極添加剤を含み、
前記正極添加剤はテルルを含み、
前記電解液はリチウム塩、有機溶媒及び電解液添加剤を含み、
前記電解液添加剤はビス(2,2,2‐トリフルオロエチル)エーテルを含むリチウム二次電池。 - 前記正極は正極集電体及び前記正極集電体の少なくとも一面に配置された正極活物質層を含み、
前記正極活物質層は正極活物質及びテルルを含むことを特徴とする請求項1に記載のリチウム二次電池。 - 前記テルルは正極活物質層全体100重量%を基準にして1重量%ないし10重量%で含まれることを特徴とする請求項2に記載のリチウム二次電池。
- 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種以上を含むことを特徴とする請求項1~3のいずれか一項に記載のリチウム二次電池。
- 前記ビス(2,2,2‐トリフルオロエチル)エーテルは電解液全体100体積%を基準にして1体積%ないし20体積%で含まれることを特徴とする請求項1~4のいずれか一項に記載のリチウム二次電池。
- 前記有機溶媒は環形エーテル及び非環形エーテルを含むことを特徴とする請求項1~5のいずれか一項に記載のリチウム二次電池。
- 前記環形エーテルは、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、テトラハイドロフラン、2‐メチルテトラハイドロフラン、2,5‐ジメチルテトラハイドロフラン、2,5‐ジメトキシテトラハイドロフラン、2‐エトキシテトラハイドロフラン、テトラハイドロピラン、1,2‐ジメトキシベンゼン、1,3‐ジメトキシベンゼン及び1,4‐ジメトキシベンゼンからなる群から選択される1種以上を含むことを特徴とする請求項6に記載のリチウム二次電池。
- 前記非環形エーテルは、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、メトキシエトキシエタン、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、エチレングリコールジエチルエーテル及びエチレングリコールエチルメチルエーテルからなる群から選択される1種以上を含むことを特徴とする請求項6又は7に記載のリチウム二次電池。
- 前記有機溶媒は、2‐メチルフラン 及びジメトキシエタン を含むことを特徴とする請求項1~8のいずれか一項に記載のリチウム二次電池。
- 前記リチウム塩は、LiCl、LiBr、LiI、LiClO4、LiBF4、LiB10Cl10、LiB(Ph)4、LiC4BO8、LiPF6、LiCF3SO3、LiCF3CO2、LiAsF6、LiSbF6、LiAlCl4、LiSO3CH3、LiSO3CF3、LiSCN、LiC(CF3SO2)3、LiN(CF3SO2)2、LiN(C2F5SO2)2、LiN(SO2F)2、クロロボランリチウム、低級脂肪族カルボン酸リチウム、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種以上を含むことを特徴とする請求項1~9のいずれか一項に記載のリチウム二次電池。
- 前記リチウム二次電池はリチウム‐硫黄電池であることを特徴とする請求項1~10のいずれか一項に記載のリチウム二次電池。
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JPH07249432A (ja) * | 1994-03-14 | 1995-09-26 | Nippon Telegr & Teleph Corp <Ntt> | リチウム2次電池用電解液 |
JPH08250120A (ja) * | 1995-03-08 | 1996-09-27 | Sanyo Electric Co Ltd | リチウム二次電池 |
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