Carbon-based transition-metal oxides are considered as an appropriate anode material candidate for lithium-ion batteries. Herein, a simple and scalable dry production process is developed to produce carbon-encapsulated 3D net-like FeO /C materials. The process is simply associated with the pyrolysis of a solid carbon source, such as filter paper, adsorbed with ferrite nitrate. The carbon derived from filter paper induces a carbothermal reduction to form metallic Fe, the addition of carbon and iron increase the conductivity of this material. As expected, this 3D net-like FeO /C composite delivers an excellent charge capacity of 851.3 mAh g after 50 cycles at 0.2 A g as well as high stability and rate performance of 714.7 mAh g after 300 cycles at 1 A g . Superior performance, harmlessness, low costs, and high yield may greatly stimulate the practical application of the products as anode materials in lithium-ion batteries.

A bowknot-like Co3O4 material has been synthesized via a gelatin-assisted hydrothermal method, which exhibits superior cyclic stability and improved rate capability.

Carbon-based transition-metal oxides are considered as an appropriate anode material candidate for lithiumion batteries.H erein, as imple and scalable dry production process is developed to produce carbon-encapsulated 3D netlike FeO x /C materials.The process is simply associated with the pyrolysis of as olid carbon source,s uch as filter paper, adsorbed with ferrite nitrate.T he carbon derived from filter paper induces ac arbothermal reduction to form metallic Fe, the addition of carbon and iron increase the conductivity of this material. As expected, this 3D net-like FeO x /C composite delivers an excellent charge capacity of 851.3 mAh g À1 after 50 cycles at 0.2 Ag À1 as well as high stability and rate performance of 714.7 mAh g À1 after 300 cycles at 1Ag À1 .S uperior performance,h armlessness,l ow costs,a nd high yield may greatly stimulate the practical application of the products as anode materials in lithium-ion batteries.

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Design and synthesis of highly efficient, stable, and low-cost catalysts have a crucial role in the study of electrolytic water. In this work, a novel Fe–Ni layered double hydroxide (LDH) material with homogeneous heterostructures is successfully synthesized by a two-step hydrothermal method. Compared with the ordinary Fe–Ni LDH arrays prepared by one step, this structure has a rougher surface, so it has a more extensive active area, thus providing more active sites. Due to the synergistic effect of different elements and more exposure of active sites, the catalytic effect of this material for water splitting is outstanding. The post-optimized FeNi@FeNi electrode exhibits extraordinary OER (oxygen evolution reaction) and HER (hydrogen evolution reaction) performance with OER overpotentials of 193, 231, and 306 mV and HER overpotentials of 127, 173, and 253 mV when the current density is 10, 20, and 50 mA·cm–2, respectively. The improved electrolytic water performance reveals that the design of homogeneous heterostructures is maybe an alternative route to exploit high-efficiency catalysts and promote the application of nonprecious metal catalytic materials.

The design and synthesis of high-performance catalysts for oxygen evolution reaction (OER) are crucial for electrocatalysis reaction. In this study, the new Ag-decorated Co-based hydroxides nanosheets with good performance as well as gram-scale yield are prepared by a selective reduction–oxidation method in virtue of the different stability of metal in air. The doping of silver obviously raises the electrical conductivity of the catalysts. Due to the synergistic reaction of the high electrical conductivity and the original active sites, the overpotential of the as-prepared Ag-decorated Co­(OH)2 nanosheets is as low as 270 mV at 10 mA/cm2. Compared to the pure Co­(OH)2 nansheets, the overpotential decreased about 80 mV at the same current density. Especially, different from the general preparation methods, this process can be carried out at room temperature and does not need any strict condition. And the gram-scale output gives this method potential for industrial production.

Ag/Ag2CO3 heterostructures with high length–diameter ratios and superior photoactivity and stability are synthesized on a large scale by a simple one-pot method.

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