Hui Kang

Bio: Hui Kang is an academic researcher from Harbin Institute of Technology. The author has contributed to research in topics: Filtration & Materials science. The author has an hindex of 2, co-authored 3 publications receiving 28 citations.

A Compact MXene Film with Folded Structure for Advanced Supercapacitor Electrode Material

Abstract: A Ti3C2Tx MXene film assembled by using conventional vacuum-assisted filtration has an outstanding volumetric performance due to its excellent pseudocapacitive and high density. However, the severe...

Super-Fast Fabrication of MXene Film through a Combination of Ion Induced Gelation and Vacuum-Assisted Filtration

Abstract: MXene (Ti3C2Tx) film produced through regular vacuum-assisted filtration have advantages of high conductivity, excellent mechanical performance, good surface wettability and others. However, the production method costs a large amount of time and energy, greatly limiting large-scale application of such film. Inspired by filtration of silt, we reveal and verify the feasibility of fast film forming through vacuum-assisted filtration of two-dimensional (2D) materials by using ions to induce MXene colloidal dispersion to transform into three-dimensional (3D) microgel in this work. A suitable gap between MXene microgel is the premise of sustainable fast water molecule filtration; the strong gelation and internal riveting effect inside the microgel ensure the formability of MXene film. Therefore, the production of MXene film is dramatically shortened from a few hours to just dozens of seconds. More importantly, MXene film prepared in this way can be folded and rubbed, and presents more excellent mechanical property, high electrochemical performance, and good electromagnetic interference shielding effective. This work provides theoretical and technical support for effective production of MXene film with excellent comprehensive properties and is of great significance to large-scale MXene film preparation and application.

Application of Multi-scale Pore Regulation for High Thermal Conductivity Foam Reinforcements in Energy Storage

Abstract: A continuous diamond film layer was initially deposited on the surface of the foam skeleton by chemical vapor deposition (CVD), followed by the vertical growth of carbon nanotubes (CNTs) on diamond film using nickel particles as a catalyst. The CNTs extended into the interior of the pores inside the foam skeleton as a secondary heat transfer pathway. The effect of different pore densities on the thermal conductivity and latent heat of phase change composites (PCMs) was explored. The obtained diamond foam/carbon nanotube/paraffin composites (DF-CNT/PWs) was demonstrated to achieve an ultra-high conductivity of 5.3 W/m·K, which is 19.6 times that of the paraffin matrix. The latent heat of the DF-CNT/PWs is 83.37 J·g−1. In addition, finite element simulation confirmed that the thermal conductivity enhancer system could significantly improve the uniformity of heat transfer inside the foam skeleton.

Pseudocapacitive Electrodes Produced By Oxidant-Free Polymerization of Pyrrole Between the Layers of 2D Titanium Carbide (MXene)

Abstract: Heterocyclic pyrrole molecules are in situ aligned and polymerized in the -absence of an oxidant between layers of the 2D Ti3C2Tx (MXene), resulting in high volumetric and gravimetric capacitances with capacitance retention of 92% after 25,000 cycles at a 100 mV s(-1) scan rate.

3D Ultralight Hollow NiCo Compound@MXene Composites for Tunable and High-Efficient Microwave Absorption

Abstract: The 3D hollow hierarchical architectures tend to be designed for inhibiting stack of MXene flakes to obtain satisfactory lightweight, high-efficient and broadband absorbers. Herein, the hollow NiCo compound@MXene networks were prepared by etching the ZIF 67 template and subsequently anchoring the Ti3C2Tx nanosheets through electrostatic self-assembly. The electromagnetic parameters and microwave absorption property can be distinctly or slightly regulated by adjusting the filler loading and decoration of Ti3C2Tx nanoflakes. Based on the synergistic effects of multi-components and special well-constructed structure, NiCo layered double hydroxides@Ti3C2Tx (LDHT-9) absorber remarkably achieves unexpected effective absorption bandwidth (EAB) of 6.72 GHz with a thickness of 2.10 mm, covering the entire Ku-band. After calcination, transition metal oxide@Ti3C2Tx (TMOT-21) absorber near the percolation threshold possesses minimum reflection loss (RLmin) value of − 67.22 dB at 1.70 mm within a filler loading of only 5 wt%. This work enlightens a simple strategy for constructing MXene-based composites to achieve high-efficient microwave absorbents with lightweight and tunable EAB. Highlights: 1 Ultralight 3D NiCo compound@MXene nanocomposites that inherited hollow polyhedral skeleton and excellent conductive network were fabricated.2 Excellent electromagnetic absorption performance was achieved with optimal RLmin value of − 67.22 dB and ultra-wide EAB of 6.72 GHz under the low filler loading.3 Electromagnetic parameters and microwave absorption property can be distinctly or slightly regulated by adjusting the filler loading and decoration of Ti3C2Tx nanoflakes.