CN109564791A - 固态电解质及全固态电池 - Google Patents
固态电解质及全固态电池 Download PDFInfo
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- 239000007784 solid electrolyte Substances 0.000 title claims abstract description 71
- 239000000203 mixture Substances 0.000 claims abstract description 24
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 15
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 9
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 9
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 8
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 7
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 5
- 239000003792 electrolyte Substances 0.000 claims description 25
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 52
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 36
- 229910001928 zirconium oxide Inorganic materials 0.000 description 36
- 229910000029 sodium carbonate Inorganic materials 0.000 description 26
- 230000000052 comparative effect Effects 0.000 description 24
- 239000011734 sodium Substances 0.000 description 20
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 18
- 239000002994 raw material Substances 0.000 description 16
- 239000002245 particle Substances 0.000 description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 13
- 238000005303 weighing Methods 0.000 description 13
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 12
- 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 11
- 229910000406 trisodium phosphate Inorganic materials 0.000 description 11
- ASTWEMOBIXQPPV-UHFFFAOYSA-K trisodium;phosphate;dodecahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].[Na+].[O-]P([O-])([O-])=O ASTWEMOBIXQPPV-UHFFFAOYSA-K 0.000 description 11
- 229910052727 yttrium Inorganic materials 0.000 description 9
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 8
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 239000010955 niobium Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 description 4
- 235000019441 ethanol Nutrition 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Inorganic materials O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 description 4
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 229910019142 PO4 Inorganic materials 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 239000007773 negative electrode material Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 3
- 239000010452 phosphate Substances 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- 239000007774 positive electrode material Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 229910000528 Na alloy Inorganic materials 0.000 description 2
- 229910020657 Na3V2(PO4)3 Inorganic materials 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 238000002847 impedance measurement Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 235000019837 monoammonium phosphate Nutrition 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229910002986 Li4Ti5O12 Inorganic materials 0.000 description 1
- 229910021311 NaFeO2 Inorganic materials 0.000 description 1
- 229910001128 Sn alloy Inorganic materials 0.000 description 1
- GWBWGPRZOYDADH-UHFFFAOYSA-N [C].[Na] Chemical compound [C].[Na] GWBWGPRZOYDADH-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
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- C01B33/325—After-treatment, e.g. purification or stabilisation of solutions, granulation; Dissolution; Obtaining solid silicate, e.g. from a solution by spray-drying, flashing off water or adding a coagulant
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Abstract
本发明涉及固态电解质及全固态电池,提高固态电解质的离子传导率,提升全固态电池的电池特性。固态电解质(13)是以Na为传导物质的NaSICON型固态电解质(13)。本发明涉及的固态电解质(13)包含Na、Zr、M、Si、P以及O,M是从Mg、V以及Nb构成的组中选择的至少一种元素。具有M和Zr的摩尔比为M/Zr<0.2的组成。
Description
技术领域
本发明涉及一种固态电解质及全固态电池。
背景技术
一直以来,全固态电池作为可靠性及安全性优良的二次电池广为人知。例如,专利文献1中记载了一种以Na为传导物质的钠超离子导电(NaSICON)型固态电解质。
专利文献1:特表2012-531709号公报
发明内容
例如,对于专利文献1中所记载的包括固态电解质的全固态电池,迫切希望提高固态电解质的离子传导率,提升全固态电池的电池特性。
本发明的主要目的在于提高固态电解质的离子传导率,提升全固态电池的电池特性。
本发明涉及的固态电解质是以Na为传导物质的NaSICON型固态电解质。本发明涉及的固态电解质包含Na、Zr、M、Si、P以及O(M是从Mg、V以及Nb构成的组中选择的至少一种元素)。具有M和Zr的摩尔比为M/Zr<0.2的组成。由此,通过使用本发明涉及的固态电解质,能够实现具有高离子传导率的固态电解质层。因此,通过使用本发明涉及的固态电解质,能够实现具有优良电池特性的全固态电池。
优选,在本发明涉及的固态电解质中还包含Y。
优选,在本发明涉及的固态电解质中,用通式Na3+x(Zr1-yYy)2-zMzSi2PO12(M是从Mg、V以及Nb构成的组中选择的至少一种元素,x:-0.2<x<0.8、y:0<y≤0.12、z:0<z≤0.3)表示。
优选,在本发明涉及的固态电解质中,0.05≤z≤0.3。
优选,在本发明涉及的固态电解质中,0.1≤z≤0.3。
优选,在本发明涉及的固态电解质中,0.1≤z≤0.15。
本发明涉及的全固态电池具备固态电解质、正极、以及负极。固态电解质层包括本发明涉及的固态电解质。正极通过烧结与固态电解质层的一个面接合。负极烧结在固态电解质层的另一面。
根据本发明,能够提高固态电解质的离子传导率,能够提升全固态电池的电池特性。
附图说明
图1是本发明的一实施方式涉及的全固态电池的示意性剖视图。
图2是在比较例二以及四、实施例五、六以及九中制作的固态电解质的奈奎斯特绘图。
具体实施方式
以下对实施本发明的优选方式的一例进行说明。但是,下述实施方式仅是例示。本发明并不受限于下述实施方式。
图1是本实施方式涉及的全固态电池1的示意性剖视图。如图1所示,具备正极11、负极12、以及固态电解质层13。
正极11包括正极活性物质粒子。作为优选使用的正极活性物质粒子例如可以举出具有钠超离子导电(NaSICON)型构造的含钠磷酸化合物粒子、含钠层状氧化物粒子等。作为优选使用的具有钠超离子导电(NaSICON)型构造的含钠磷酸化合物的具体例子可以举出Na3V2(PO4)3等。作为优选使用的含钠层状氧化物粒子的具体例子可以举出NaFeO2、NaNi1/ 3Co1/3Fe1/3O2等。既可以只使用这些正极活性物质粒子中的一种,也可以混合多种使用。
正极11还可以包括固态电解质。虽然包含在正极11中的固态电解质的种类无特别限定,但是优选包含与包含在固态电解质层13中的固态电解质相同种类的固态电解质。在这种情况下,能够提高固态电解质层13和正极11的密合强度。
负极12包括负极活性物质粒子。作为优选使用的负极活性物质粒子的具体例子例如可以举出用MOX(M是从Ti、Sn以及Fe构成的组中选择的至少一种。0.9≤X≤2.5)表示的化合物粒子、难石墨化碳-钠化合物粒子、钠合金粒子、具有钠超离子导电(NaSICON)型构造的含钠磷酸化合物粒子、具有尖晶石型构造的含锂氧化物粒子等。作为优选使用的钠合金的具体例子可以举出Na-Sn合金等。作为优选使用的具有钠超离子导电(NaSICON)型构造的含钠磷酸化合物的具体例子可以举出Na3V2(PO4)3等。作为优选使用的具有尖晶石型构造的含锂氧化物的具体例子可以举出Li4Ti5O12等。既可以只使用这些负极活性物质粒子中的一种,也可以混合多种使用。
负极12还可以包括固态电解质。虽然包括在负极12中的固态电解质的种类无特别限定,但是优选包括与包括在固态电解质层13中的固态电解质相同种类的固态电解质。在这种情况下,能够提高固态电解质层13和负极12的密合强度。
在正极11和负极12之间配置有固态电解质层13。即,固态电解质层13的一侧配置有正极11,另一侧配置有负极12。正极11和负极12分别通过烧结与固态电解质层13接合。即,正极11、固态电解质层13、以及负极12是一体烧结体。固态电解质层13包括以Na为传导物质的钠超离子导电(NaSICON)型固态电解质。详细而言,固态电解质层13包含Na、Zr、M、Si、P以及O(M是从Mg、V以及Nb构成的组中选择的至少一种元素),并包括具有M和Zr的摩尔比为M/Zr<0.2的组成的固态电解质。由此,本实施方式涉及的固态电解质层13具有高离子传导率。因此,具有固态电解质层13的全固态电池1的输出密度等的电池特性优良。从实现更高的离子传导率的观点看,优选使用满足M/Zr<0.1的固态电解质。但是,如果M和Zr的摩尔比过小,就存在不能获得M的添加效果的情况。因此,优选M和Zr的摩尔比为M/Zr>0.02,更优选为M/Zr>0.05。
优选,固态电解质13还包含Y。在固态电解质13包含Y的情况下,能够进一步提高固态电解质13的离子传导率。
优选,固态电解质13例如用通式Na3+x(Zr1-yYy)2-zMzSi2PO12(M是从Mg、V以及Nb构成的组中选择的至少一种元素,x:-0.2<x<0.8、y:0<y≤0.12、z:0<z≤0.3)表示。在这种情况下,如下述实施例所示,能够进一步提高固态电解质13的离子传导率。
在通式Na3+x(Zr1-yYy)2-zMzSi2PO12(M是从Mg、V以及Nb构成的组中选择的至少一种元素,x:-0.2<x<0.8、y:0<y≤0.12、z:0<z≤0.3)中,优选0.05≤z≤0.3,更优选0.1≤z≤0.3,进一步更优选0.1≤z≤0.15。如下述实施例所示,通过使z在此范围内,能够进一步提高离子传导率。
另外,虽然由通式Na3+x(Zr1-yYy)2-zMzSi2PO12(M是从Mg、V以及Nb构成的组中选择的至少一种元素,x:-0.2<x<0.8、y:0<y≤0.12、z:0<z≤0.3)表示的化合物含有12个氧,但是从保持正电荷和负电荷的中性的观点看,包含在由此通式表示的化合物中的氧的数量的O的化学计量比可以不严格是12个。在本发明中,使由上述通式表示的化合物中包含含有7摩尔以上15摩尔以下的氧。
以下基于具体的实施例对本发明做进一步详细说明,本发明并不受限于以下实施例,能够在不改变其主旨的范围内进行适当变更来实施。
(比较例一)
称量适量磷酸钠十二水合物(Na3PO4·12H2O)、碳酸钠(Na2CO3)、氧化锆(ZrO2)、二氧化硅(SiO2)等原料以形成能够得到满足表1所示的条件的通式的组成。接下来,将称量的原料粉末、乙醇、以及φ2mm的鹅卵石密封到聚乙烯制聚乙烯罐中并在罐架上旋转,混合原料。接下来,通过在加热至90℃的加热板上加热原料来除去乙醇。这之后,通过在空气气氛下以1100℃的温度煅烧原料8小时来除去挥发成分,得到预煅烧物。接下来,将得到的预煅烧物、乙醇、以及φ2mm的鹅卵石密封到氧化锆制罐中,用行星式球磨装置旋转罐以粉碎预煅烧物。这之后,通过在90℃的加热板上配置预煅烧物并加热来除去乙醇,并得到预烧粉碎粉。接下来,在550kN/cm2的压力下,将得到的预烧粉碎粉成型为φ10mm×厚度500μm~1000μm的片。接下来,在空气气氛下以1100℃~250℃的温度煅烧10小时,得到具有下述表1中所记载的比较例一的组成的固态电解质料片。
(实施例一)
除了称量适量的磷酸钠十二水合物(Na3PO4·12H2O)、碳酸钠(Na2CO3)、氧化锆(ZrO2)、二氧化硅(SiO2)、氧化镁(MgO)等原料以形成能够得到满足表1所示的条件的通式的组成之外,进行其他与比较例一的处理相同的处理以得到具有下述表1中所记载的实施例一的组成的固态电解质料片。
(实施例二)
除了称量适量的碳酸钠(Na2CO3)、氧化锆(ZrO2)、磷酸二氢铵(NH4H2PO4)、二氧化硅(SiO2)、氧化钒(V2O5)等原料以形成能够得到满足表1所示的条件的通式的组成之外,进行其他与比较例一的处理相同的处理以得到具有下述表1中所记载的实施例二的组成的固态电解质料片。
(实施例三)
除了称量适量的碳酸钠(Na2CO3)、氧化锆(ZrO2)、磷酸二氢铵(NH4H2PO4)、二氧化硅(SiO2)、五氧化铌(Nb2O5)等原料以形成能够得到满足表1所示的条件的通式的组成之外,进行其他与比较例一的处理相同的处理以得到具有下述表1中所记载的实施例三的组成的固态电解质料片。
(比较例二)
除了称量适量磷酸钠十二水合物(Na3PO4·12H2O)、碳酸钠(Na2CO3)、氧化锆(ZrO2)、二氧化硅(SiO2)、氧化钇(Y2O3)、钇稳定氧化锆(YSZ)等原料以形成能够得到满足表2所示条件的通式的组成之外,进行其他与比较例一的处理相同的处理以得到具有下述表2中所记载的比较例二的组成的固态电解质料片。将得到的固态电解质料片的奈奎斯特绘图在图1中示出。
(实施例四)
除了称量适量的磷酸钠十二水合物(Na3PO4·12H2O)、碳酸钠(Na2CO3)、氧化锆(ZrO2)、二氧化硅(SiO2)、氧化钇(Y2O3)、钇稳定氧化锆(YSZ)、氧化镁(MgO)等原料以形成能够得到满足表2所示的条件的通式的组成之外,进行其他与比较例一的处理相同的处理以得到具有下述表2中所记载的实施例四的组成的固态电解质料片。
(实施例五)
除了称量适量的磷酸钠十二水合物(Na3PO4·12H2O)、碳酸钠(Na2CO3)、氧化锆(ZrO2)、二氧化硅(SiO2)、氧化钇(Y2O3)、钇稳定氧化锆(YSZ)、五氧化钒(V2O5)等原料以形成能够得到满足表2所示的条件的通式的组成之外,进行其他与比较例一的处理相同的处理以得到具有下述表2中所记载的实施例五的组成的固态电解质料片。将得到的固态电解质料片的奈奎斯特绘图在图1中示出。
(实施例六)
除了称量适量的磷酸钠十二水合物(Na3PO4·12H2O)、碳酸钠(Na2CO3)、氧化锆(ZrO2)、二氧化硅(SiO2)、氧化钇(Y2O3)、钇稳定氧化锆(YSZ)、五氧化铌(Nb2O5)等原料以形成能够得到满足表2所示的条件的通式的组成之外,进行其他与比较例一的处理相同的处理以得到具有下述表2中所记载的实施例六的组成的固态电解质料片。将得到的固态电解质料片的奈奎斯特绘图在图1中示出。
(实施例七)
除了称量适量磷酸钠十二水合物(Na3PO4·12H2O)、碳酸钠(Na2CO3)、氧化锆(ZrO2)、二氧化硅(SiO2)、氧化钇(Y2O3)、钇稳定氧化锆(YSZ)、氧化镁(MgO)等原料以形成能够得到满足表3所示的条件的通式的组成之外,进行其他与比较例一的处理相同的处理以得到具有下述表3中所记载的实施例七的组成的固态电解质料片。
(实施例八)
除了称量适量磷酸钠十二水合物(Na3PO4·12H2O)、碳酸钠(Na2CO3)、氧化锆(ZrO2)、二氧化硅(SiO2)、氧化钇(Y2O3)、钇稳定氧化锆(YSZ)、氧化镁(MgO)等原料以形成能够得到满足表3所示的条件的通式的组成之外,进行其他与比较例一的处理相同的处理以得到具有下述表3中所记载的实施例八的组成的固态电解质料片。
(实施例九)
除了称量适量磷酸钠十二水合物(Na3PO4·12H2O)、碳酸钠(Na2CO3)、氧化锆(ZrO2)、二氧化硅(SiO2)、氧化钇(Y2O3)、钇稳定氧化锆(YSZ)、氧化镁(MgO)等原料以形成能够得到满足表3所示的条件的通式的组成之外,进行其他与比较例一的处理相同的处理以得到具有下述表3中所记载的实施例九的组成的固态电解质料片。将得到的固态电解质料片的奈奎斯特绘图在图1中示出。
(实施例十)
除了称量适量磷酸钠十二水合物(Na3PO4·12H2O)、碳酸钠(Na2CO3)、氧化锆(ZrO2)、二氧化硅(SiO2)、氧化钇(Y2O3)、钇稳定氧化锆(YSZ)、氧化镁(MgO)等原料以形成能够得到满足表3所示的条件的通式的组成之外,进行其他与比较例一的处理相同的处理以得到具有下述表3中所记载的实施例十的组成的固态电解质料片。
(比较例三)
除了称量适量磷酸钠十二水合物(Na3PO4·12H2O)、碳酸钠(Na2CO3)、氧化锆(ZrO2)、二氧化硅(SiO2)、氧化钇(Y2O3)、钇稳定氧化锆(YSZ)、氧化镁(MgO)等原料以形成能够得到满足表3所示的条件的通式的组成之外,进行其他与比较例一的处理相同的处理以得到具有下述表3中所记载的比较例三的组成的固态电解质料片。将得到的固态电解质料片的奈奎斯特绘图在图1中示出。
(固态电解质的离子传导率的评价)
用以下方式测量在实施例一~实施例十、比较例一~比较例三中分别制作的固态电解质料片的离子传导率。
具体而言,在通过溅射在固态电解质料片的两个面形成为集电体层的铂(Pt)层后,在100℃的温度下干燥固态电解质料片,除去水分,用2032型的纽扣电池外壳密封。通过对密封后的电池进行交流阻抗测量计算离子传导率。交流阻抗测量使用Solartron公司制造的频率响应分析仪(FRA),在频率范围是0.1MHz~1MHz、振幅是±10mV、温度是25℃的条件下实施。
如表1所示,分别在实施例一~实施例三中制作的固态电解质的离子传导率是2.6×10-4S/cm~4.8×10-4S/cm,任一个均是比在比较例一中制作的固态电解质的离子传导率高的值。
如表2所示,分别在实施例四~实施例六中制作的固态电解质的离子传导率为1.4×10-3S/cm~2.6×10-3S/cm,任一个均是比在比较例二中制作的固态电解质的离子传导率高的值。
如表3所示,分别在实施例七~实施例十中制作的固态电解质的离子传导率是1.2×10-3S/cm~1.6×10-3S/cm,任一个均是比在比较例三中制作的固态电解质的离子传导率高的值。
附图标记说明
1:全固态电池;11:正极;12:负极;13:固态电解质层。
Claims (7)
1.一种固态电解质,是以Na为传导物质的NaSICON型的固态电解质,
包含Na、Zr、M、Si、P以及O,M是从Mg、V以及Nb构成的组中选择的至少一种元素,
具有M和Zr的摩尔比为M/Zr<0.2的组成。
2.根据权利要求1所述的固态电解质,其中,
所述固态电解质还包含Y。
3.根据权利要求1或2所述的固态电解质,其中,
用通式Na3+x(Zr1-yYy)2-zMzSi2PO12表示,M是从Mg、V以及Nb构成的组中选择的至少一种元素,x:-0.2<x<0.8,y:0<y≤0.12,z:0<z≤0.3。
4.根据权利要求1至3中任一项所述的固态电解质,其中,
0.05≤z≤0.3。
5.根据权利要求4所述的固态电解质,其中,
0.1≤z≤0.3。
6.根据权利要求5所述的固态电解质,其中,
0.1≤z≤0.15。
7.一种全固态电池,具备:
固态电解质层,包括权利要求1至6中任一项所述的固态电解质;
正极,通过烧结与所述固态电解质层的一个面接合;以及
负极,通过烧结与所述固态电解质层的多个面接合。
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