Preparation of a high-performance nanocrystalline lithium/graphene composite battery via high-pressure torsion method

Abstract

This paper creatively introduces the high-pressure torsion treatment (HPT) technique for the preparation of lithium ion battery electrodes. Through the preparation of a nanocrystalline lithium/graphene composite structure, a high-performance dendrite-free electrode was obtained. Furthermore, for light metal processing via the HPT method, the strain-grain relationship is still applicable under high-pressure torsion and results in excellent electrochemical performance. As a physical metallurgical method for the preparation of nano-metal composite materials, the HPT method has advantages that are not possessed by hydrothermal methods. These include a rapid, low-cost synthesis with minimal by-products from the chemical reaction.