Multi-layered composite electrodes of high power Li4Ti5O12 and high capacity SnO2 for smart lithium ion storage

Discrete layering of high power Li4Ti5O12 and capacity SnO2 in a through-thickness multi-layered composite electrode was achieved using layer-by-layer spray printing approach order to explore new capacity-power combinations for lithium ion based electrochemical energy storage. Electrochemical behavior electrodes optimized as function the thickness discrete layer, range 2 6 µm, interleaved between two layers low volume expansion Li4Ti5O12. Three µm were then evenly produce “layer cake” negative cross-section that offered remarkable rate capability when coupled with printed LiFePO4 positive battery arrangement. The also activated carbon capacitor configuration, providing significant improvements density. double-sided fabrication multi-layer over 20 × cm2 current collector area suggested possible hybrid device combines attributes batteries capacitors.