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Authorities say 35-year-old Hongjin Tan pleaded guilty on Tuesday in federal court in Tulsa to theft of a trade secret, unauthorized transmission of a trade secret and unauthorized possession of a trade secret.
A plea agreement calls for Tan to serve up to two years in prison and pay restitution of $150,000.
Tan’s attorney, Ryan Ray, hasn’t returned a telephone message seeking comment.
Court documents indicate Tan worked for Phillips 66 when he stole secrets related to the development of “next generation battery technologies” worth more than $1 billion.
Sentencing is set for February 2020.