【摘 要】
：
Combining nanomaterials with complementary properties in a well-designed structure is an effective tactic to exploit multifunctional,high-performance materials for the energy conversion and storage.Nonprecious metal catalysts,such as cobalt oxide,with sup
【机 构】
：
Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Nor
论文部分内容阅读
Combining nanomaterials with complementary properties in a well-designed structure is an effective tactic to exploit multifunctional,high-performance materials for the energy conversion and storage.Nonprecious metal catalysts,such as cobalt oxide,with superior activity and excellent stability to other catalysts are widely desired.Nevertheless,the performance of CoO nanoparticles as an electrode material were significantly limit for its inferior conductivity,dissolution,and high cohesion.Herein,we grow ultrafine cobalt monoxide to decorate the interlayer and surface of the Ti3C2Tx nanosheets via a hydrothermal method companied by calcination.The layered MXenes act as the underlying conductive substrate,which not only increase the electron transfer rate at the interface but also greatly improve the electrochemical properties of the nanosized CoO particles by restricting the aggregation of CoO.The resulting CoO/Ti3C2Tx nanomaterial is applied as oxygen electrode for lithium-oxygen battery and achieves more than 160 cycles and first cycle capacity of 16,220 mAh g-1 at 100 mA g-1.This work paves a promising avenue for constructing a bi-functional catalyst by coupling the active component of a transition metal oxide (TMO) with the MXene materials in lithium-oxygen battery.
其他文献
The application of commercial carbon fiber cloth (CFC) in energy storage equipment is limited by its low specific capacitance and energy density.By a simple one-step activation treatment,the specific surface area of CFCs with porous structure can be incre
MXene is a rising star of two-dimensional (2D) materials for energy relative applications,however,the traditional synthesis of MXene etched by hazard HF acid or LiF+HCl mixed solution is highly dangerous with the risk of splashing or pouring liquid soluti
Lithium-sulfur batteries (LSBs) hold great potential for large-scale electrochemical energy storage applications.Currently,the shuttle of soluble lithium polysulfide (LiPSs) intermediates with sluggish conversion kinetics and random deposition of Li2S hav
Industrial propane dehydrogenation (PDH) catalysts generally suffer from low catalytic stability due to the coke formation onto the catalyst surface to cover the active sites.The exploitation of an efficient catalyst with both high catalytic selectivity a
Molybdenum phosphide (MOP) catalyst has been widely applied in hydrogenation reactions,while the preparation of unsupported MoP catalysts with ultra-small size and large specific surface area (SBET) is still challenging.Herein,we have provided a facile me
Polymeric organic battery materials are promising alternatives to the transition-metal-based ones owing to their enriched chemistries.However,the flammability of organic compounds brings in serious concern on battery safety.In addition to use flame-retard
Developing the highly active,cost-effective,environmental-friendly,and ultra-stable nonprecious electrocatalysts for hydrogen evolution reaction (HER) is distinctly indispensable for the large-scale practical applications of hydrolytic hydrogen production
Development of cost-effective and highly active oxygen evolution catalysts operating well in acidic media is a critical challenge in proton exchange membrane water electrolysis.Herein,we present a class of iridium-based 12L-perovskites (Ba4MIr3O12;M =Pr,B
Construction of oxygen evolution electrocatalysts with abundant oxygen defects and large specific surface areas can significantly improve the conversion efficiency of overall water splitting.Herein,we adopt a controlled method to prepare oxygen defect-ric