When tested as the anode in lithium-ion batteries LIBs, Cu/LTO showed superior performance, such as a lifespan greater than 2000 cycles and an ultrafast charging time (<45 s). Herein, we report a new route to fabricate a bicontinuous Cu/Li4Ti5O12 scaffold that consists of Li4Ti5O12 nanoparticles (LTO NPs) with highly exposed (111) facets and nanoporous Cu scaffolds, which enable simultaneous high-capacity and high-rate lithium storage. Nanostructured active materials with both high-capacity and high-rate capability have attracted considerable attention, but they remain a great challenge to be realized. This binary synergistic nanoarray system identifies an optimized electrode design strategy for advanced battery materials. At a high current density of 500 mAg-1, they could maintain a discharge capacity as high as 804 mAhg-1 after 100 cycles, working much higher than unary cobalt-based and zinc-based nanoarrays. In a multilevel array ordered by orientation, ultrafine ZnxCo3-xO4 nanowire functional units and stable Zn1-圜oyO nanorod supporting units synergize, resulting in superior rate performance. Herein, inspired by natural fibrous roots consisting of functional and supporting units that can enhance substances and energy exchange efficiently, fibrous-root-like binary TMO nanoarrays are designed and synthesized on Cu substrates through a facile one-pot, successive-deposition process, for use as an integrated LIB anode. The structure design of TMO is an effective strategy to obtain desirable LIB performance. Meanwhile, they also suffer from slow lithium diffusion and limited electrochemical and structural stability, especially at high charging/discharging rate. Transition metal oxides (TMOs) materials are widely studied as the next-generation LIB anode to satisfy this requirement, due to their specific capacity nearly three times than that of conventional graphite anode and low cost. In this review, the latest progress and breakthrough in the application of MOF and MOF-derived materials for energy storage and conversion devices are summarized, including Li-based batteries (Li-ion, Li–S and Li–O2 batteries), Na-ion batteries, supercapacitors, solar cells and fuel cells.ĭeveloping lithium ion batteries (LIBs) with fast charging/discharging capability and high capacity is a significant issue for future technical requirements. In addition to pristine MOFs, MOF derivatives such as porous carbons and nanostructured metal oxides can also exhibit promising performances in energy storage and conversion applications. Among these novel materials, metal–organic frameworks (MOFs), a class of porous materials, have gained increasing attention for utilization in energy storage and conversion systems because of ultra-high surface areas, controllable structures, large pore volumes and tunable porosities. Because of this, the exploration of novel materials for energy storage and utilization is urgently needed to achieve low-carbon economy and sustainable development. Therefore, the α-FeOOH CTPs electrode displays excellent cycling performance with a reversible specific capacity of 870 mAh g⁻¹ at 100 mA g⁻¹ after 100 cycles.Īs modern society develops, the need for clean energy becomes increasingly important on a global scale. In addition, tiny crystallites are generated during the cycle, which increase the contact area between the electrode and electrolyte. The CTP contributes to structural stability and avoids the common pulverization process of electrodes. The formation of α-FeOOH is associated with the growth and subsequent phase transformation of β-FeOOH. Depending on the reaction time, two different types of top-endings, one flat or two canted facets, are obtained. In addition, the single α-FeOOH corner-truncated tetragonal prism (CTP) is enclosed by six side facets, two. The obtained α-FeOOH CTPs exhibit high-quality single-crystalline nature. The morphology, structure and electrochemical properties of CTPs are systematically studied. Novel goethite (α-FeOOH) corner-truncated tetragonal prisms (CTPs) with a length of about 1 μm and a width of about 200 nm have been synthesized by a hydrothermal method.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |