Glass-ceramic, lithium ion conductor, battery, electronic device, and method for producing electrode

Patent metadata

Field	Value
Publication number	US-2017229734-A1
Application number	US-201515514556-A
Country	US
Kind code	A1
Filing date	Nov 9, 2015
Priority date	Nov 10, 2014
Publication date	Aug 10, 2017
Grant date	—

Abstract

A glass-ceramic includes an oxide containing lithium (Li), silicon (Si), and boron (B) and has an X-ray diffraction spectrum with two or more peaks appearing in the range 20°≦2θ≦25° and with two or more peaks appearing in the range 25°<2θ≦30°.

First claim

1 . A glass-ceramic comprising an oxide containing lithium (Li), silicon (Si), and boron (B),
the glass-ceramic having an X-ray diffraction spectrum with at least two peaks appearing in the range 20°≦2θ≦25° and with at least two peaks appearing in the range 25°<2θ≦30°.

2 . The glass-ceramic according to claim 1 , wherein
the oxide includes at least 69 mol % of an oxide of the lithium (Li), the glass-ceramic having a Raman spectrum with a peak X appearing in the Raman shift region of 920 cm −1 to 940 cm −1 and with a peak Y appearing in the Raman shift region of 820 cm to 850 cm and also having a ratio X/Y of an area intensity of the peak X to an area intensity of the peak Y of at least 2.0.

3 . The glass-ceramic according to claim 1 , wherein
the oxide includes 50 mol % to less than 69 mol % of an oxide of the lithium (Li), the glass-ceramic having a Raman spectrum with peaks appearing in the Raman shift region of 500 cm −1 to 1,000 cm −1 , wherein the peaks include a main peak with a full width at half maximum of 20 or more.

4 . The glass-ceramic according to claim 1 , which has a 7 Li nuclear spin-lattice relaxation time of at most 6 seconds as measured by a nuclear magnetic resonance method.

5 . The glass-ceramic according claim 1 , wherein
the oxide comprises an oxide of the lithium (Li), an oxide of the silicon (Si), and an oxide of the boron (B), the content of the oxide of the lithium (Li) is from 40 mol % to 73 mol % based on the total amount of the oxide of the lithium, the oxide of the silicon (Si), and the oxide of the boron (B), the content of the oxide of the silicon (Si) is from 8 mol % to 40 mol % based on the total amount of the oxide of the lithium, the oxide of the silicon (Si), and the oxide of the boron (B), and the content of the oxide of the boron (B) is from 10 mol % to 50 mol % based on the total amount of the oxide of the lithium, the oxide of the silicon (Si), and the oxide of the boron (B).

6 . The glass-ceramic according to claim 1 , wherein
the oxide further contains at least one selected from the group consisting of sodium (Na), magnesium (Mg), aluminum (Al), phosphorus (P), potassium (K), calcium (Ca), titanium (Ti), vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), gallium (Ga), germanium (Ge), selenium (Se), rubidium (Rb), sulfur (S), yttrium (Y), zirconium (Zr), niobium (Nb), molybdenum (Mo), silver (Ag), indium (In), tin (Sn), antimony (Sb), cesium (Cs), barium (Ba), hafnium (Hf), tantalum (Ta), tungsten (W), lead (Pb), bismuth (Bi), gold (Au), lanthanum (La), neodymium (Nd), and europium (Eu).

7 . A battery comprising a positive electrode, a negative electrode, and an electrolyte layer, wherein
at least one of the positive electrode, the negative electrode, and the electrolyte layer contains a glass-ceramic having an X-ray diffraction spectrum with at least two peaks appearing in the range 20°≦2θ≦25° and with at least two peaks appearing in the range 25°<2θ≦30°.

8 . An electronic device having a battery comprising a positive electrode, a negative electrode, and an electrolyte layer and being configured to receive power supply from the battery, wherein
at least one of the positive electrode, the negative electrode, and the electrolyte layer contains a glass-ceramic having an X-ray diffraction spectrum with at least two peaks appearing in the range 20°≦2θ≦25° and with at least two peaks appearing in the range 25°<2θ≦30°.

9 . A lithium ion conductor comprising an oxide containing lithium (Li), silicon (Si), and boron (B),
the lithium ion conductor having an X-ray diffraction spectrum with at least two peaks appearing in the range 20°≦2θ≦25° and with at least two peaks appearing in the range 25°<2θ≦30°.

10 . A lithium ion conductor comprising an oxide containing lithium (Li), silicon (Si), and boron (B),
the lithium ion conductor having an X-ray diffraction spectrum with a peak A appearing in the range 25°≦2θ≦26° and with a peak B appearing in the range 41°≦2θ≦42°.

11 . The lithium ion conductor according to claim 10 , which has a ratio of the intensity of the peak A to the intensity of the peak B of 0.5 to 2.

12 . A battery comprising a positive electrode, a negative electrode, and an electrolyte layer, wherein
at least one of the positive electrode, the negative electrode, and the electrolyte layer contains a lithium ion conductor having an X-ray diffraction spectrum with a peak A appearing in the range 25°≦2θ≦26° and with a peak B appearing in the range 41°<2θ≦42°.

13 . An electronic device having a battery comprising a positive electrode, a negative electrode, and an electrolyte layer and being configured to receive power supply from the battery, wherein
at least one of the positive electrode, the negative electrode, and the electrolyte layer contains a lithium ion conductor having an X-ray diffraction spectrum with a peak A appearing in the range 25°≦2θ≦26° and with a peak B appearing in the range 41°≦2θ≦42°.

14 . A method for producing an electrode, the method comprising firing an electrode comprising an active material and a lithium ion conductor while pressurizing the electrode, wherein
the lithium ion conductor comprises an oxide containing lithium (Li), silicon (Si), and boron (B).

Assignees

• Sony Corp

Inventors

• Furukawa Keiko
• Furuya Tatsuya
• Kumita Hideyuki
• Miyaji Sae
• Shibata Harumi
• Suzuki Masamitsu
• Sudo Go
• Shimizu Keisuke

Classifications

• H01M4/62

  Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title

• C03C10/0054

  containing PbO, SnO2, B2O3 · CPC title

• C03C3/064

  containing boron · CPC title

• H01M2300/0068

  inorganic · CPC title

• H01M10/052

  Li-accumulators · CPC title