Integrated Solid/Nanoporous Copper/Oxide Hybrid Bulk Electrodes for High-performance Lithium-Ion Batteries

Abstract

Nanoarchitectured electroactive materials can boost rates of Li insertion/extraction, showing genuine potential to increase power output of Li-ion batteries. However, electrodes assembled with low-dimensional nanostructured transition metal oxides by conventional approach suffer from dramatic reductions in energy capacities owing to sluggish ion and electron transport kinetics. Here we report that flexible bulk electrodes, made of three-dimensional bicontinuous nanoporous Cu/MnO2 hybrid and seamlessly integrated with Cu solid current collector, substantially optimizes Li storage behavior of the constituent MnO2. As a result of the unique integration of solid/nanoporous hybrid architecture that simultaneously enhances the electron transport of MnO2, facilitates fast ion diffusion and accommodates large volume changes on Li insertion/extraction of MnO2, the supported MnO2 exhibits a stable capacity of as high as ~1100 mA h g−1 for 1000 cycles, and ultrahigh charge/discharge rates. It makes the environmentally friendly and low-cost electrode as a promising anode for high-performance Li-ion battery applications.

Binder-free combination of amorphous TiO2 nanotube arrays with highly conductive Cu bridges for lithium ion battery anode

“…Obviously, TiO 2 nanotube arrays via anodization were amorphous, as reported elsewhere [24]. After electrodeposition, Cumodified TiO 2 nanotube arrays exhibited a new diffraction peak at 2θ = 43°, which can be assigned to crystal plane (111) of metal Cu [15,25]. Clearly, XRD results can effectively confirm the presence of metal Cu on amorphous TiO 2 nanotube arrays.…”

“…Besides the common anodic current collector, other applications of Cu additive material in various forms have also been reported in literatures [15,16]. For example, Cu was incorporated into the lattice of Mn 2 O 3 anode material to modulate the crystal structure, morphology, surface area, and Li-storage activity [16].…”

Atomic Layer Deposited MoS 2 as a Carbon and Binder Free Anode in Li-ion Battery

“…The theoretical capacity of 670 mAh g À1 is calculated based on the faradic reaction (diffusion controlled reactions) between Li and MoS 2 where 4 moles of Li reacts with MoS 2 to form Li 2 S and Mo. In practice, the obtained capacity from a lithium ion battery system not only comes from the faradic reactions but also from non faradic (capacitive reactions such as double layer capacitance and pseudocapacitance) [58][59][60] and side reactions (electrolyte decomposition and Li + adsorption on SEI layers) [61]. Several researchers observed that the capacity contribution from capacitive reaction could be up to 30 to 60% of the total capacity [60].…”

How to improve the stability and rate performance of lithium-ion batteries with transition metal oxide anodes

“…88 On the other hand, the oxidation peak at ;2.2 V in the anodic sweep exhibits little change during the three cycles, suggesting that the SEI formed on the PGC nanosheets surfaces in the first cycle is very stable.…”