Electrochemical cell
AssigneeEchion Technologies Limited
InventorsHarry Geary, Loubna El Ouatani, Prince Babbar, Alexander Groombridge
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Abstract
The invention provides an electrochemical cell, such as a lithium-ion battery, comprising an anode, a cathode, and an electrolyte disposed between the anode and cathode; wherein the anode comprises an oxide comprising niobium as an active anode material, wherein the crystal structure of the oxide comprising niobium corresponds to the crystal structure of MII2Nb34O87, MIIINb11O29, MIIINb49O124, MIVNb24O62, MVNb9O25, MVINb12O33, H—Nb2O5, or N—Nb2O5; wherein the cell has an N/P ratio >1 as defined in the specification.
Claims19
An electrochemical cell comprising an anode, a cathode, and an electrolyte disposed between the anode and cathode;
- wherein the anode comprises an oxide comprising niobium as an active anode material, wherein the crystal structure of the oxide comprising niobium corresponds to the crystal structure of MII2Nb34O87, MIIINb11O29, MIIINb49O124, MIVNb24O62, MVNb9O25, MVINb12O33, H—Nb2O5, or N—Nb2O5;
- wherein the cell has an N/P ratio >1, wherein N/P is defined as:
- areal
-
- loading
-
- (
- mgcm
- -
- 2
- )
-
- (
- anode
- )
- ×
- active
-
- fraction
-
- (
- wt
-
- %
- )
-
- (
- anode
- )
- ×
- first
-
- lithiation
-
- capacity
- (
- mAhg
- -
- 1
- )
-
- (
- anode
- )
- areal
-
- loading
-
- (
- mgcm
- -
- 2
- )
-
- (
- cathode
- )
- ×
- active
-
- fraction
-
- (
- wt
-
- %
- )
- (
- cathode
- )
- ×
- first
-
- delithiation
-
- capacity
- (
- mAhg
- -
- 1
- )
-
- (
- cathode
- )
- wherein:
- areal loading (mgcm−2) is the dry loading of the electrode composition, not taking into account the current collector;
- active fraction (wt %) is the percentage of the dry electrode composition that is active material;
- first lithiation/delithiation capacity (mAhg−1) is the specific capacity at C/10 at 25° C. for the first lithiation cycle for the anode or the first delithiation cycle for the cathode measured on an equivalent half-cell with a Li-metal counter electrode.
Dependencies are inferred from the claim text.