Li-ion batteries with a Ge NWs-based anode have the unique ability to fully charge and discharge at relatively high current at temperatures significantly below zero.

Abstract

The aim of this work is to study of germanium nanowires as low temperature and high charging rate lithium-ion battery anode material. Using a full cell with a cathode based on NMC811 and an anode based on synthesized germanium nanostructures in combination with the proposed electrolyte composition, we demonstrate the ability to charge and cycle the battery at temperatures as low as −40 °C. The results generally indicate that using germanium nanowires as anode material in lithium-ion batteries may solve the problem of their reversible and safe charging at sub-zero temperatures.