US 12,009,488 B2
Replenished negative electrodes for secondary batteries
Christopher G. Castledine, Sunnyvale, CA (US); David T. Fouchard, Coquitlam (CA); Jonathan C. Doan, Pleasanton, CA (US); Christopher J. Spindt, Menlo Park, CA (US); Robert M. Spotnitz, Pleasanton, CA (US); James D. Wilcox, Pleasanton, CA (US); Ashok Lahiri, Cupertino, CA (US); and Murali Ramasubramanian, Fremont, CA (US)
Assigned to Enovix Corporation, Fremont, CA (US)
Filed by Enovix Corporation, Fremont, CA (US)
Filed on Jan. 18, 2023, as Appl. No. 18/098,285.
Application 18/098,285 is a continuation of application No. 16/998,203, filed on Aug. 20, 2020, granted, now 11,569,533.
Application 16/998,203 is a continuation of application No. 15/572,191, granted, now 10,770,760, issued on Sep. 8, 2020, previously published as PCT/US2016/031222, filed on May 6, 2016.
Claims priority of provisional application 62/158,758, filed on May 8, 2015.
Prior Publication US 2023/0155189 A1, May 18, 2023
Int. Cl. H01M 10/44 (2006.01); H01M 4/38 (2006.01); H01M 10/0525 (2010.01); H01M 10/48 (2006.01)
CPC H01M 10/448 (2013.01) [H01M 4/386 (2013.01); H01M 10/0525 (2013.01); H01M 10/446 (2013.01); H01M 10/48 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of cycling a secondary battery between a charged state and a discharged state, the secondary battery comprising a negative electrode, a positive electrode, a microporous separator between the negative and positive electrodes permeated with a carrier ion-containing electrolyte in ionic contact with the negative and positive electrodes, and a controller, wherein
the positive electrode comprises a cathodically active material and has a positive electrode coulombic capacity for the carrier ions,
the negative electrode comprises anodically active silicon or an alloy thereof and has a negative electrode coulombic capacity for the carrier ions that exceeds the positive electrode coulombic capacity,
the controller is programmed with a predefined cell end of charge voltage Vcell,eoc value and a predefined cell end of discharge voltage Vcell,eod value, and
the positive electrode has an end of discharge voltage Vpos,eod and the negative electrode has an end of discharge voltage Vneg,eod when the secondary battery is at the predefined Vcell,eod, the value of Vpos,eod corresponds to a voltage at which a state of charge of the positive electrode is at least 95% of its coulombic capacity and Vneg,eod is at least 0.4 V (vs Li) but less than 0.9 V (vs Li),
wherein the method comprises cycling the secondary battery by repeatedly charging the secondary battery to the charged state having a cell end of charge voltage that does not exceed the predefined Vcell,eoc value, and discharging the secondary battery to the discharged state having a cell end of discharge voltage that does not exceed the predefined Vcell,eod value.