Huang Ruiyi

Bio: Huang Ruiyi is an academic researcher from Hefei University of Technology. The author has contributed to research in topics: Hydrothermal circulation & Pyrolysis. The author has an hindex of 1, co-authored 2 publications receiving 1 citations.

Method for preparing hierarchical-pore phosphorus-doped carbon material from biomass

Abstract: The invention relates to a method for preparing a hierarchical-pore phosphorus-doped carbon material from biomass. The method comprises the following steps: firstly, crushing the biomass into tiny particles; then uniformly mixing the crushed biomass particles with a phosphoric acid-containing solution according to a certain ratio to form a mixture; putting the mixture into a hydrothermal reactionkettle, and carrying out a hydrothermal reaction at a certain temperature to generate hydrothermal carbon; dehydrating and drying the hydrothermal carbon obtained after the hydrothermal reaction; andputting the dried hydrothermal carbon into a pyrolyzing furnace, and carrying out rapid pyrolysis under the protection of an inert atmosphere to obtain a hierarchical-pore phosphorus-doped carbon material after rapid pyrolysis. According to the method disclosed by the invention, a rapid pyrolysis scheme is combined with phosphoric acid hydrothermal pre-carbonization, so a very ideal effect can beachieved only by performing rapid pyrolysis in a very short time, carbon preparation efficiency is greatly improved, and energy consumption is remarkably reduced; and meanwhile, due to the existence of phosphorus, a good carbon sequestration effect can be achieved, and carbon yield is increased.

Structure‐Engineered Low‐Cost Carbon Microbelt Hosts for Highly Robust Potassium Metal Anode

Abstract: Potassium metal as anode is an ideal material for the assembly of high specific energy batteries. However, safety issues caused by unrestricted dendrite growth and “dead K” generation severely limit their application. Here, based on the concept of waste recycling, a structural engineering strategy (chemical exfoliation and enzyme-assisted synergistic method) is proposed to prepare oxygen-containing functionalized porous carbon microbelts (OPCMs) as freestanding K metal hosts. The porous structure, uniformly distribution of carbon nanospheres, and the presence of oxygen-containing functional groups reduce the energy barrier of K nucleation and promote the deposition kinetics. Benefitting from these advantages of OPCMs, the OPCMs-based K composite anodes (K-OPCMs) are free of obvious dendrite growth during the plating process. Symmetric cells assembled with K-OPCMs maintain a stable overpotential of 40 mV after cycling for more than 800 h at 1 mA cm−2. In addition, the K-OPCMs//organic cathode (PTCDA) full cell exhibits excellent rate capability (96% capacity retention, 100–2000 mA g−1, which is superior to most reported potassium metal batteries) and ultralong lifespan (97.8 mA h g−1, after 1500 cycles at 2000 mA g−1). This study illustrates the effectiveness of structure-engineered and provides a guiding insight for achieving high-performance rechargeable batteries.

High-phosphorus-nitrogen co-doped three-dimensional porous carbon block and preparation method and application thereof

Abstract: The invention provides a high-phosphorus-nitrogen co-doped three-dimensional porous carbon block and a preparation method and application thereof, the carbon block has a three-dimensional interconnected macroporous open pore structure, a small amount of mesopores and micropores are distributed in the structure, the BET specific surface area is 5-30 m g , and the carbon block contains 50-85 at% of carbon element, 2-20 at% of phosphorus element, 2-20 at% of nitrogen element and 5-40 at% of oxygen element. The high-phosphorus-nitrogen co-doped three-dimensional porous carbon block can be used as a battery electrode material, and especially when the high-phosphorus-nitrogen co-doped three-dimensional porous carbon block is used as a negative electrode of a potassium ion battery, an excellent reversible specific capacity, initial coulombic efficiency, rate capability and cycling stability can be considered.