Performance of Li-ion battery with silicon nanowire in anode

Abstract

Li-ion batteries are extensively used in electronic devices, cell phones, new energy vehicle batteries, and other sectors, and they have a lot of promise in electric cars and other domains. With the development of the times, batteries with carbon as anode material can no longer meet the demand of electric vehicles and other fields for battery energy density. Silicon, one of the most potential anode materials, demonstrates extremely high theoretical battery energy density. In the past few years, research on silicon nanostructures, especially silicon nanowires, has effectively solved the problem of volume change of Li alloying with Si, and significantly improved the life and charge-discharge rates of anodes. Moreover, the composite of silicon nanowires with other materials has become one of the most interesting research directions. This paper reviews several silicon nanowires grown in different preparation methods and their impacts on the performance of lithium-ion batteries as anode materials. Two kinds of silicon nanowire composite with other materials as anode of lithium-ion battery are also introduced.