Wang Jingwei

Harbin Institute of Technology; The Hong Kong Polytechnic University

This paper introduces a multi‐degree of freedom bionic crocodile robot designed to tackle the challenge of cleaning pollutants and debris from the surfaces of narrow, shallow rivers. The robot mimics the “death roll” motion of crocodiles which is a technique used for object disintegration. First, the design incorporated a swinging tail mechanism us...

Metallic materials have long been used in a wide range of industrial applications due to their outstanding physical and mechanical properties as well as high process latitudes. Mechanical machining is one of the important steps in manufacturing of metallic components because it directly influences the surface quality of the finial products. To date...

The application of low-cost and high-safety aqueous Zn metal batteries is seriously hindered by Zn anode stemming from its uncontrollable dendrite growth and detrimental water-induced side reactions. Herein, a zinc-enriched and negatively charged poly zinc acrylate (PZA) polyelectrolyte with hydrophobic 3D network is firstly constructed on Zn surfa...

With the ever-growing demand for high energy density rechargeable batteries, it imposes urgent requirements for developing high-capacity anodes such as Li metal, Si, and Zn metal. Nevertheless, the anodes have great challenges: uncontrolled Li dendrite growth for Li metal, huge volume change for Si, and Zn dendrite growth and side reactions for Zn...

A novel borax-crosslinked hydrogel electrolyte membrane is synthesized using radical polymerization to achieve superior electrochemical performances and outstanding mechanical properties. The as-synthesized electrolyte membrane displays high ionic conductivity (1.72 × 10⁻² S cm⁻¹), wide electrochemical stable window (∼2.21 V), large fracture stress...

A sodium-ion conducting poly(vinyl alcohol)-based gel polymer electrolyte membrane is developed by plasticizing with an ionic liquid, for the fabrication of electric double-layer capacitors. Sodium triflate is selected as the sodium salt. 1-Ethyl-3 methylimidazoliumtrifluoromethanesulfonate is employed as the plasticizer. The properties of the elec...

This paper theoretically and experimentally analyses and discusses the material deformation mechanism of commercial pure titanium (CP Ti) in ultraprecision machining. One sample with two obviously diverse microstructures is first obtained by compressive test followed by electropulsing treatment (EPT) for 30 s. Then, ultraprecision diamond turning w...

With 1-methyl-2-pyrrolidinone (NMP) as the solvent, the biodegradable gel polymer electrolyte films are prepared based on poly(vinyl alcohol) (PVA), lithium bis(trifluoromethane)sulfonimide (LiTFSI), and 1-ethyl-3 methylimidazoliumbis(trifluoromethylsulfonyl)imide (EMITFSI) by means of solution casting. The films are characterized to evaluate their...

The highly stretchable pure poly(vinyl alcohol) (PVA) membranes with high amorphicity and large ductility are prepared based on an N-methylpyrrolidone (NMP) solution. Meanwhile, the PVA based gel electrolyte membranes doped with magnesium trifluoromethanesulfonate (Mg(Tf)2) and plasticized with 1-ethyl-3-methylimidazoliumtrifluoromethanesulfonate (...

Polymeric ionic liquid-based gel electrolyte films are a new generation of electrolyte materials for flexible energy storage device applications. In this work, Li-ion conducting gel electrolyte films are prepared with the polymeric ionic liquid poly(diallydimethylammonium) bis(trifluoromethane sulfonyl)imide (poly(DADMATFSI)) as the host polymer an...

Based on poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP) and lithium tetrafluoroborate (LiBF4) salt along with blending plasticizers, ethylene carbonate (EC) and propylene carbonate (PC), high Li-ion-conducting gel polymer electrolyte films are developed. Their properties are characterized by various techniques. The ambient temperature...

A new gel polymer electrolyte based on 1-methyl-1-propylpyrrolidinium bis(trifluoromethyl sulfonyl)imide ([PMpyr][NTf2]) entrapped in poly(vinylidene fluoride-hexafluoropropylene) (PVdF-HFP) is prepared and optimized for flexible solid state supercapacitor applications. The structural, thermal, electrical and electrochemical properties of the ionic...

Ionic liquid-doped biodegradable gel polymer electrolyte membranes are currently new opportunities for rechargeable magnesium-ion batteries. In this work, poly(vinyl alcohol)/magnesium trifluoromethanesulfonate/1-ethyl-3-methylimidazolium trifluoromethanesulfonate (PVA/Mg(Tf)2/EMITf) membranes of different compositions are prepared by solution cast...

Biodegradable polymer electrolyte films based on poly(ε-caprolactone) (PCL) in conjunction with lithium tetrafluoroborate (LiBF4) salt and 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIMBF4) ionic liquid were prepared by solution cast technique. The structural, morphological, thermal, and electrical properties of these films were examined using...

Lithium ion conducting biodegradable gel polymer electrolytes based on a poly (ε-caprolactone):lithium tetrafluoroborate (PCL:LiBF4) system doped with various concentrations of 1-Ethyl-3-methylimidazolium tetrafluoroborate (EMIMBF4) ionic liquid were prepared by solution cast technique. The gel polymer electrolyte was eco-friendly, flexible, transp...