Vanadium oxysulfide based cathode materials for rechargeable battery
View Patent ↗A cathode active composite containing an amorphous composite of vanadium oxide and an inorganic sulfide is provided. In one embodiment the composite contains vanadium pentoxide and phosphorous pentasulfide. An elctrochemical cell and a reversible battery having a cathode containing the cathode active composite are also provided. In one embodiment the battery is a magnesium battery.
1. A cathode active material, comprising:
an amorphous composite of a vanadium oxide and an inorganic sulfide compound selected from the group consisting of P 2 S 5 , B 2 S 3 , SiS 2 , GeS 2 , Al 2 S 3 and Ga 2 S 3 .
2. The cathode active material of claim 1 , wherein the vanadium oxide comprises a vanadium pentoxide of formula V 2 O 5 .
3. The cathode active material of claim 1 , wherein the vanadium oxide consists of vanadium pentoxide of formula V 2 O 5 .
4. The cathode active material of claim 1 , wherein the inorganic sulfide compound is B 2 S 3 .
5. The cathode active material of claim 4 , wherein the inorganic sulfide compound is P 2 S 5 .
6. A cathode, comprising:
a current collector; and
the cathode active material of claim 1 .
7. The cathode of claim 6 , wherein the vanadium oxide comprises a vanadium pentoxide of formula V 2 O 5 .
8. The cathode of claim 6 , wherein the vanadium oxide consists of vanadium pentoxide of formula V 2 O 5 .
9. The cathode of claim 6 , wherein the inorganic sulfide compound is B 2 S 3 .
10. The cathode of claim 9 , wherein the inorganic sulfide compound is P 2 S 5 .
11. The cathode of claim 6 , wherein the vanadium oxide is vanadium pentoxide of formula V 2 O 5 and the inorganic sulfide compound is P 2 S 5 .
12. The cathode of claim 11 , wherein a content of the V 2 O 5 is from 70 to 80 mol % based on the amorphous composite.
13. An electrochemical cell comprising:
an anode;
the cathode of claim 6 ; and
an electrolyte;
wherein the anode and cathode are capable of absorbing and releasing a metal ion selected from the group consisting of a lithium ion, a sodium ion and a magnesium ion.
14. A magnesium battery comprising the electrochemical cell of claim 13 wherein the anode and cathode are capable of absorbing and releasing a magnesium ion.
15. The magnesium battery of claim 14 , wherein the vanadium oxide comprises vanadium pentoxide of formula V 2 O 5 .
16. The magnesium battery of claim 14 , wherein the vanadium oxide consists of vanadium pentoxide of formula V 2 O 5 .
17. The magnesium battery of claim 14 , wherein the inorganic sulfide compound is B 2 S 3 .
18. The magnesium battery of claim 17 , wherein the inorganic sulfide compound is P 2 S 5 .
19. The magnesium battery of claim 14 , wherein the vanadium oxide is vanadium pentoxide of formula V 2 O 5 and the inorganic sulfide compound is P 2 S 5 .
20. The magnesium battery of claim 19 , wherein a content of the V 2 O 5 is from 70 to 80 mol % based on the amorphous composite.