ϵ-VOPO4 cathode for lithium ion batteries
Patent
·
OSTI ID:2222041
The epsilon polymorph of vanadyl phosphate, ε-VOPO4, made from the solvothermally synthesized H2VOPO4, is a high density cathode material for lithium-ion batteries optimized to reversibly intercalate two Li-ions to reach the full theoretical capacity at least 50 cycles with a coulombic efficiency of 98%. This material adopts a stable 3D tunnel structure and can extract two Li-ions per vanadium ion, giving a theoretical capacity of 305 mAh/g, with an upper charge/discharge plateau at around 4.0 V, and one lower at around 2.5 V.
- Research Organization:
- State Univ. of New York (SUNY), Binghamton, NY (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- SC0012583
- Assignee:
- The Research Foundation for The State University (Binghamton, NY)
- Patent Number(s):
- 11,715,829
- Application Number:
- 17/670,470
- OSTI ID:
- 2222041
- Country of Publication:
- United States
- Language:
- English
Highly Reversible Li Insertion at 4 V in ɛ-VOPO[sub 4]/α-LiVOPO[sub 4] Cathodes
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journal | January 1999 |
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