In-operando neutron reflectometry studies on lithium insertion into silicon electrodes of Li-ion batteries

Abstract

Lithium ion incorporation into amorphous silicon electrodes was monitored via in-op-erando neutron reflectometry in real-time during battery cell operation. Recent results of cyclic voltammetry experiments are presented. These experiments enable us to mon-itor the enormous volume expansion, the formation and evolution of the SEI (solid elec-trolyte interphase), the determination of irreversible capacity losses and voltage hyste-resis effects during cycling.