Hybrid Energy Storage Devices Based on Monolithic Electrodes Containing Well-defined TiO2 Nanotube Size Gradients

On the Capacity Losses Seen for Optimized Nano‐Si Composite Electrodes in Li‐Metal Half‐Cells

“…The very low delithiation capacities seen for the almost fully lithiated silicon electrodes (see Figures S3–S5 in the Supporting Information) may then merely be ascribed to the inability of the electrodes to comply with the employed current densities as the electrodes clearly were full of lithium that should be able to undergo oxidation. As previously discussed, the inherent asymmetry between the lithiation and delithiation reactions should make the lithiation step the rate‐limiting step, in excellent agreement with the experimental results discussed in Section .…”

“…As is described in more detail in Section , the lithium trapping effect should schematically result in the electrode becoming filled up in a process in which the trapped lithium appears to move toward the electrode surface. It is also likely that the lithium diffusion rate in the silicon electrode depends on the concentration of lithium in the electrode (see Section ), in analogy with the behaviors seen for other electrodes . It can consequently be expected that the lithiation step should become more and more difficult as the lithium concentration in the electrode is increasing.…”

Tailoring of Morphology and Crystalline Structure of Nanoporous TiO2–TiO–TiN Composite Films for Enhanced Capacity as Anode Materials of Lithium-Ion Batteries

“…In the past decades, fabrication of nanotubular TiO 2 anodic films has been extensively investigated by anodizing Ti foils in an organic electrolyte (i.e., ethylene glycol) containing highly corrosive fluoride ions in the form of HF, NaF or NH 4 F and several mass percent water. [18][19][20]22,[26][27][28][29][30] However, the low electronic conductivity of anodic TiO 2 films resulted in poor electron transport and slow Li-ion diffusion in electrodes, and increased the resistance at the interface of electrode/electrolyte at high charge/discharge rates. The other strategy is to hybridize the TiO 2 nanomaterials with other conductive components in binary or ternary composites, to improve the electronic conductivity and structural stability of 36 However, it inevitably increases the procedure and cost in fabricating electrode materials, in addition to sacrificing the discharge capacity.…”

Light‐Driven Bipolar Electrochemical Logic Gates with Electrical or Optical Outputs

“…Bipolar electrochemistry is a general phenomenon used to trigger electrochemical reactions on the surface of conductive objects without the need for contacting them with electrical wires . It is currently attracting a strong interest in the fields of materials science, analytical chemistry, motion generation and seawater desalination . The development of devices allowing signal computation in fluidic and chemical systems is also of particular scientific interest, with a focus on molecular, microfluidic and electrochemical systems .…”

“…Finally,w es how that the input electrical potential can be considerably lowered in the presence of the Fe III (CN) 6 3À /Fe II (CN) 6 4À redoxc ouple in solution.Bipolar electrochemistry is ageneral phenomenon used to trigger electrochemical reactions on the surfaceo fc onductive objects without the need for contacting themw ith electrical wires. [1] It is currently attracting as trong interest in the fields of materials science, [2][3][4][5][6][7][8][9][10][11][12] analytical chemistry, [13][14][15][16][17][18][19][20][21][22][23][24] motion generation [2,25,26] and seawater desalination. [27] The development of devices allowing signal computation in fluidic and chemical systemsi sa lso of particular scientific interest, [28][29][30][31][32] with af ocus on molecular, [30,[33][34][35][36] microfluidic [31,37,38] and electrochemical systems.…”