Multifunctional mixed metal olivines for lithium ion batteries
First Claim
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1. A method for monitoring and maintaining the performance of an electrochemical cell, comprising:
- providing an electrochemical cell having a positive electrode and negative electrode separated by an electrolyte, the composition of electroactive materials of the positive electrode, the negative electrode, or both selected to provide a cell having a plurality of open circuit voltages at different states of charge, said composition selected to provide a change in voltage of the cell at a pre-selected state of charge;
monitoring the cell to detect a change in cell voltage; and
changing a current or power into or out of the cell in response to the detected change in voltage.
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Abstract
Electroactive compositions are disclosed for use in lithium ion battery electrodes. The compositions, such as multifunctional mixed metal olivines, provide an electrochemical cell having a plurality of open circuit voltages at different states of charge. The compositions afford improved state-of-charge monitoring, overcharge protection and/or overdischarge protection for lithium ion batteries.
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Citations
28 Claims
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1. A method for monitoring and maintaining the performance of an electrochemical cell, comprising:
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providing an electrochemical cell having a positive electrode and negative electrode separated by an electrolyte, the composition of electroactive materials of the positive electrode, the negative electrode, or both selected to provide a cell having a plurality of open circuit voltages at different states of charge, said composition selected to provide a change in voltage of the cell at a pre-selected state of charge; monitoring the cell to detect a change in cell voltage; and changing a current or power into or out of the cell in response to the detected change in voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification