Anode material and battery using same
The present disclosure provides an anode material having further improved charge/discharge efficiency. The anode material according to the present disclosure includes an anode active material and a first solid electrolyte material. The first solid electrolyte material includes Li, M, and X, and does not include sulfur. M is at least one selected from the group consisting of metalloid elements and metal elements other than Li. X is at least one kind selected from the group consisting of Cl, Br, and I. The anode active material is an active material capable of storing and releasing lithium ions at a potential with respect to lithium of not less than 0.27 V.
1. An anode material, comprising:
an anode active material comprising at least one selected from the group consisting of indium metal, titanium oxide, and lithium titanate; and
a first solid electrolyte material represented by the following composition formula:
Li a Me b Y c X 6 ,
wherein
Me is at least one selected from the group consisting of Mg, Ca, Sr, Ba, Zn, Sc, Al, Ga, Bi, Zr, Hf, Ti, Sn, Ta, and Nb,
X is at least one selected from the group consisting of Cl, Br, and I,
a+mb+3c=6, a>0, b≥0 and c>0 are satisfied, and
m represents a valence of Me.
2. The anode material according to claim 1 , wherein
the first solid electrolyte material is
Li 3 YCl 6 ,
Li 3 YBr 6 ,
Li 2.5 Y 0.5 Zr 0.5 Cl 6 , or
Li 3 YBr 2 Cl 2 I 2 .
3. The anode material according to claim 1 , wherein Me is Zr.
4. The anode material according to claim 1 , wherein
the first solid electrolyte material is represented by the following composition formula:
Li 6-3c Y c X 6 or Li 2.5 Y 0.5 Zr 0.5 Cl 6 ,
where 0<c<2 is satisfied.
5. The anode material according to claim 1 , wherein
the anode active material comprises lithium titanate.
6. The anode material according to claim 5 , wherein
the lithium titanate comprises Li 4 Ti 5 O 12 .
7. A battery comprising:
an anode comprising the anode material according to claim 1 ;
a cathode; and
an electrolyte layer comprising a sulfide solid electrolyte provided between the cathode and the anode.
8. A battery comprising:
an anode comprising the anode material according to claim 1 ;
a cathode; and
an electrolyte layer comprising the first solid electrolyte material provided between the cathode and the anode.