No abstract

Additive‐free nanoscale LiCoO2 thin‐films deposited on Si substrates using DC sputtering show exceptional electrochemical performance due to the unique kinetics of the nanoscale thin‐film in aqueous environment. At extremely high scan rates and galvanostatic current densities of up to 100 mV s−1 and 200 C respectively, a capacity retention equivalent to 97 mAh g−1 (4.8 μAh cm−2, 48.3 μAh cm−2 μm−1) is obtained. A significant contribution of non‐diffusion controlled kinetics in a LiCoO2 electrode is shown.

No abstract

Energy provision and storage are significant and critical issues for wireless sensor network (WSN) applications. Hybrid energy devices incorporating energy harvesting and storage requires the development of enhanced energy storage materials and architectures. A decreased footprint with the same energy capability is desirable to maximise the energy density and enable long-life wireless sensors. Methods to structure active and support battery materials enhance the device characteristics offering mechanical and electrical support. The results below are for materials that can be processed in 3D or 1D to decrease the footprint of the energy storage element. The effect of the support material is also shown to be significant and directly relevant for high aspect ratio nanostructure where the lithium active materials experience volume changes during charge and discharge.