Battery cell and n situ battery electrode analysis method
Battery cells are provided that can include: a housing defining a chamber having a fluid inlet and outlet; an anode at one side of the housing; a cathode at another side of the housing opposing and spaced apart from the anode a sufficient amount to allow for electrolyte between the anode and cathode; and the other side of the chamber defined by an ion permeable member. Methods for in situ battery electrode analysis are provided and these methods can include: providing a battery cell having an anode and a cathode; exposing the battery cell to an ion beam while the battery cell is operational to form secondary ions; and detecting the secondary ions to analyze the battery.
1. A method for in situ battery electrode analysis comprising:
providing a battery cell having an anode and a cathode, as well as a ion permeable member having an opening;
exposing the battery cell to an ion beam through the opening while the battery cell is operational to form secondary ions; and
detecting the secondary ions to analyze the battery.
2. The method of claim 1 further comprising exposing the anode to the ion beam while the battery cell is operational to form the secondary ions.
3. The method of claim 1 further comprising exposing the electrolyte to the ion beam while the battery cell is operational to form the secondary ions.
4. The method of claim 1 further comprising determining the composition of the anode of the cell during charging or discharging of the cell.
5. The method of claim 1 further comprising determining the composition of the anode/electrolyte interface during the charging or discharging of the cell.
6. The method of claim 1 further comprising determining the composition of the cathode during charging or discharging of the cell.
7. The method of claim 1 further comprising determining the composition of the cathode/electrolyte interface during the charging or discharging of the cell.
8. The method of claim 1 further comprising determining the composition of the electrolyte during the charging or discharging of the cell.
9. The method of claim 1 wherein Li metal is deposited on the anode surface during charging and Li metal is stripped from the anode surface during discharging.