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EP-4738505-A1 - SOLID-STATE BATTERY AND APPLICATION THEREOF

EP4738505A1EP 4738505 A1EP4738505 A1EP 4738505A1EP-4738505-A1

Abstract

Provided are a solid-state battery (10) and an application thereof. The solid-state battery (10) at least includes: a first solid-state electrolyte layer (131), disposed on a positive electrode (11) side of the solid-state battery (10), an ionic conductivity of the first solid-state electrolyte layer (131) being 1×10 -4 S/cm to 1×10 -2 S/cm; and a second solid-state electrolyte layer (132), disposed on a negative electrode (12) side of the solid-state battery (10), an ionic conductivity of the second solid-state electrolyte layer (132) being 1×10 -3 S/cm to 2×10 -2 S/cm. Through the solid-state battery (10) and the application thereof, the solid-state electrolyte membrane of the solid-state battery (10) may have advantages of high lithium ion conductivity, excellent electrochemical redox stability, and good compatibility with positive electrode (11) and negative electrode (12), thereby improving a performance of the solid-state battery (10).

Inventors

  • YU, LE
  • WU, MING

Assignees

  • AESC Japan Ltd.

Dates

Publication Date
20260506
Application Date
20250922

Claims (10)

  1. A solid-state battery (10), comprising: a first solid-state electrolyte layer (131), disposed on a positive electrode (11) side of the solid-state battery (10), an ionic conductivity of the first solid-state electrolyte layer (131) being 1×10 -4 S/cm to 1×10 -2 S/cm; and a second solid-state electrolyte layer (132), disposed on a negative electrode (12) side of the solid-state battery (10), an ionic conductivity of the second solid-state electrolyte layer (132) being 1×10 -3 S/cm to 2×10 -2 S/cm.
  2. The solid-state battery (10) according to claim 1, wherein the first solid-state electrolyte layer (131) comprises a first electrolyte, a chemical formula of the first electrolyte is Li 2+n Zr 1-n M n Cl 6-x-y Br x I y , 0≤n≤0.6, 0≤x≤6, 0≤y≤6, x+y<6, and M is selected from at least one of V, Cr, Mn, Fe, Co, or Ni.
  3. The solid-state battery (10) according to claim 2, wherein M is Fe, and a range of n is 0.01≤n≤0.5.
  4. The solid-state battery (10) according to claim 1, wherein the second solid-state electrolyte layer (132) comprises a second electrolyte, a chemical formula of the second electrolyte is Li a P 1-b T b S c O d X e , 5<a<6, 0<b<1, 1.5<c<5, 0<d<2.5, 4<c+d<5, 1<e<2, T is selected from at least one of Al, Ga, In, Ti, Sc, As, Sb, Bi, As, V, or Nb, and X is selected from at least one of Cl, Br, or I.
  5. The solid-state battery (10) according to claim 4, wherein T is selected from at least one of Sb, In, or Bi, X is Cl, and a range of b is 0<b<0.1.
  6. The solid-state battery (10) according to claim 1, wherein the second solid-state electrolyte layer (132) comprises a second electrolyte, a chemical formula of the second electrolyte is Li f P 1-g E g S w O g Q z , 5<f<10, 0<g<1, 3<w<6, 4<w+g<6, 0<z<2, E is selected from at least one of Mg, Ca, Sr, Ba, Zn, Cr, Sn, or Pb, and Q is selected from at least one of Cl, Br, or I.
  7. The solid-state battery (10) according to claim 6, wherein E is Mg, Q is Cl, and a range of g is 0.01≤g≤0.1.
  8. The solid-state battery (10) according to claim 1, wherein a thickness of the first solid-state electrolyte layer (131) is 1µm to 100µm.
  9. The solid-state battery (10) according to claim 1, wherein a thickness of the second solid-state electrolyte layer (132) is 5µm to 150µm.
  10. An electronic device, comprising the solid-state battery (10) according to any one of claims 1 to 9.

Description

BACKGROUND Technical Field The disclosure relates to a field of battery technology, and specifically relates to a solid-state battery and an application thereof. Related Art With the rapid development of electric vehicles and wearable devices, the demand for high-performance lithium ion batteries is increasing. Solid-state batteries, as a type of lithium ion battery, have received widespread attention due to advantages such as high energy density, good safety, and strong durability. However, in the practical application of the solid-state batteries, solid-state electrolyte membranes are difficult to have advantages of good film-forming properties, high lithium ion ionic conductivity, excellent electrochemical redox stability, and good compatibility with positive and negative electrodes, thereby limiting the development and application of the solid-state batteries. SUMMARY The disclosure provides a solid-state battery and an application thereof. Through the solid-state battery and application thereof provided by the disclosure, the solid-state electrolyte membrane of the solid-state battery may have advantages of high lithium ion ionic conductivity, excellent electrochemical redox stability, and good compatibility with positive and negative electrodes, thereby improving a performance of the solid-state battery. To solve the aforementioned technical problems, the disclosure provides a solid-state battery, at least including: a first solid-state electrolyte layer, disposed on a positive electrode side of the solid-state battery, where an ionic conductivity of the first solid-state electrolyte layer is 1×10-4S/cm to 1×10-2S/cm; and a second solid-state electrolyte layer, disposed on a negative electrode side of the solid-state battery, where an ionic conductivity of the second solid-state electrolyte layer is 1×10-3S/cm to 2×10-2S/cm. In an embodiment of the disclosure, the first solid-state electrolyte layer includes a first electrolyte, where a chemical formula of the first electrolyte is Li2+nZr1-nMnCl6-x-yBrxIy, 0≤n≤0.6, 0≤x≤6, 0≤y≤6, x+y<6, and M is selected from at least one of V, Cr, Mn, Fe, Co, or Ni. In an embodiment of the disclosure, M is Fe, and a range of n is 0.01≤n≤0.5. In an embodiment of the disclosure, the second solid-state electrolyte layer includes a second electrolyte, where a chemical formula of the second electrolyte is LiaP1-bTbScOdXe, 5<a<6, 0<b<1, 1.5<c<5, 0<d<2.5, 4<c+d<5, 1<e<2, T is selected from at least one of Al, Ga, In, Ti, Sc, As, Sb, Bi, As, V, or Nb, and X is selected from at least one of Cl, Br, or I. In an embodiment of the disclosure, T is selected from at least one of Sb, In, or Bi, X is Cl, and a range of b is 0<b<0.1. In an embodiment of the disclosure, the second solid-state electrolyte layer includes a second electrolyte, where a chemical formula of the second electrolyte is LifP1-gEgSwOgQz, 5<f<10, 0<g<1, 3<w<6, 4<w+g<6, 0<z<2, E is selected from at least one of Mg, Ca, Sr, Ba, Zn, Cr, Sn, or Pb, and Q is selected from at least one of Cl, Br, or I. In an embodiment of the disclosure, E is Mg, Q is Cl, and a range of g is 0.01<g<0.1. In an embodiment of the disclosure, a thickness of the first solid-state electrolyte layer is 1µm to 100µm. In an embodiment of the disclosure, a thickness of the second solid-state electrolyte layer is 5µm to 150µm. The disclosure also provides an electronic device, including the aforementioned solid-state battery. In summary, the disclosure provides the solid-state battery and the application thereof, which may enable the solid-state electrolyte membrane of the solid-state battery to have the advantage of high lithium ion conductivity, thereby improving the working efficiency of the battery. The electrochemical redox stability of the solid-state electrolyte membrane may be improved, and therefore the electrolyte may effectively resist problems such as redox reactions and electrode interface instability. The electrochemical window of the solid-state electrolyte membrane may be broaden, and therefore the solid-state electrolyte membrane may be compatible with high-voltage positive electrodes such as lithium-rich manganese-based or lithium nickel manganese oxide to improve the stability of the lithium ion battery. Moreover, the cycle performance of the solid-state battery may be improved, thereby extending the service life of the battery. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions of the embodiments of the disclosure, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are merely some embodiments of the disclosure. For those skilled in the art, other drawings may also be obtained according to these drawings without creation. FIG. 1 is a structural diagram of a solid-state battery in an embodiment of the disclosure.FIG. 2 is a process schematic diagram of preparing a first solid-state electrolyte layer and a second soli