Battery, method of charging and discharging the battery and charge-discharge control device for the battery

摘要

A method of charging and discharging a battery that includes an anode. The anode includes silicon and is capable of inserting and extracting lithium. At the time of charge, the potential of the anode vs. lithium metal as a reference potential is 0.04 V or more. At the time of discharge, the potential of the anode vs. lithium metal as a reference potential is 1.4 V or less.

主权项

1. A method of charging and discharging a battery, comprising the steps of:
providing the battery comprising (a) an anode, which includes an anode active material comprising silicon and is capable of inserting and extracting lithium, (b) a cathode, which includes a cathode active material comprising lithium and is capable of inserting and extracting lithium, and (c) an electrolyte including a carbonate derivative containing a halogen atom; charging the battery; and discharging the battery, wherein,
the cathode active material and anode active material are present in amounts such that (a) a molar ratio of lithium atoms to silicon atoms in the anode is 3.5 or more and 4.0 or less when the battery is charged and (b) the molar ratio of lithium atoms to silicon atoms is 0.40 or more and 0.46 or less when the battery is discharged.