A5083806541- Membrane Separation and Gas Transport
- Covalent Organic Framework Applications
- Membrane Separation Technologies
- Graphene research and applications
- Advancements in Battery Materials
- Synthesis and properties of polymers
- Advanced Battery Materials and Technologies
- Advanced Photocatalysis Techniques
- GaN-based semiconductor devices and materials
- Metal-Organic Frameworks: Synthesis and Applications
- Muon and positron interactions and applications
- Ga2O3 and related materials
- Chemical Synthesis and Characterization
- Membrane-based Ion Separation Techniques
- Fuel Cells and Related Materials
- Semiconductor materials and devices
- Extraction and Separation Processes
- ZnO doping and properties
- Semiconductor Quantum Structures and Devices
- Electrocatalysts for Energy Conversion
- Radio Frequency Integrated Circuit Design
- Advanced battery technologies research
- Perovskite Materials and Applications
- Conducting polymers and applications
- Silicon Carbide Semiconductor Technologies
Tiangong University
2018-2025
Xidian University
2011-2025
King Abdullah University of Science and Technology
2013-2024
North Minzu University
2012-2024
State Ethnic Affairs Commission
2019-2024
Nanjing Institute of Geography and Limnology
2021-2024
Chinese Academy of Sciences
2006-2024
Institute of Process Engineering
2024
Nanjing Normal University
2018-2024
Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application
2020-2024
Abstract Lithium (Li)‐ion batteries (LIB) have governed the current worldwide rechargeable battery market due to their outstanding energy and power capability. In particular, LIB's role in enabling electric vehicles (EVs) has been highlighted replace oil‐driven order reduce usage of oil resources generation CO 2 gases. Unlike Li, sodium is one more abundant elements on Earth exhibits similar chemical properties indicating that Na chemistry could be applied a system. 1970s‐80s, both Na‐ion...
To evaluate the potential of Na-ion batteries, we contrast in this work difference between and Li-ion based intercalation chemistries terms three key battery properties—voltage, phase stability diffusion barriers. The compounds investigated comprise layered AMO2 AMS2 structures, olivine maricite AMPO4 NASICON A3V2(PO4)3 structures. calculated Na voltages for are 0.18–0.57 V lower than that corresponding Li voltages, agreement with previous experimental data. We believe observed predominantly...
Monoclinic α- NaMnO2 is re-investigated electrochemically as a positive electrode material for sodium ion batteries. About 0.85 Na can be deintercalated from and 0.8 intercalated back during potentiostatical intermittent charge discharge. Galvanostatical cycling between 2.0 V 3.8 gives 185 mAh/g discharge capacity the first cycle at C/10 rate 132 remains after 20 cycles. Charge curves are significantly different indicating more hysteresis than typical lithium intercalation compounds. We also...
This review provides a new perspective on the role of state-of-the-art polymers intrinsic microporosity (PIMs) in key energy-intensive membrane-based gas separations including O2/N2, H2/N2, H2/CH4, CO2/CH4, H2S/CH4, C2H4/C2H6, and C3H6/C3H8 applications. A general overview separation properties novel PIM materials developed past 15 years is presented with updated performance maps latest pure-gas 2015 H2/CH4 permeability/selectivity upper bounds. Specifically, functionalized ladder PIMs...
Monoclinic NaNiO2 is re-investigated as a positive electrode material for sodium ion batteries. We observe reversible Na extraction and insertion of about 120 mAh/g when cycled between 1.25 V 3.75 V, though discharge only proceeds to Na0.91NiO2. The voltage profile shows large pronounced steps, which are fully reversible. Charging 4.5 leads higher charge capacity, with poor coulombic efficiency rapid capacity fade. X-ray diffraction charged samples indicates that high charging the formation...
A newly designed diamine monomer, 3,3,3′,3′-tetramethyl-1,1′-spirobisindane-5,5′-diamino-6,6′-diol, was successfully used to synthesize two types of polyimides for membrane-based gas separation applications. The novel polymers integrate significant microporosity and polar hydroxyl groups, showing the combined features intrinsic (PIMs) functional (PIs). They possess high thermal stability, good solubility, easy processability membrane fabrication; resulting membranes exhibit permeability...
Increases in hydrogen selectivity of more than 100% compared with the most selective ladder polymer intrinsic microporosity (PIM) reported to date are achieved self-polymerized A-B-type monomers comprising rigid and three-dimensional 9,10-dialkyl-substituted triptycene moieties. The selectivities match those materials commercially employed separation, but gas permeabilities 150-fold higher. This new molecular sieve is also PIM for air separation.
Ordered was synthesized through a solid-state reaction. Even though the material has particle size of , it shows very high rate capability and excellent capacity retention. The is as at 167C discharge rate. This performance consistent with first-principles calculations activation barrier for lithium motion, which predict diffusivity in this to be around . We also systematically investigated effect several cell components electrode construction on measured conclude that care taken remove all...
Na-ion batteries represent an effective energy storage technology with slightly lower and power densities but potentially material costs than Li-ion batteries. Here, we report a new polyanionic intercalation cathode of unusual chemical class: sidorenkite (Na3MnPO4CO3). This carbonophosphate compound shows high discharge capacity (∼125 mAh/g) specific (374 Wh/kg). In situ X-ray diffraction measurement suggests that undergoes solid solution type reversible topotactic structural evolution upon...
To understand the difference in reversible energy storage capacity between O3-type layered Na and Li compounds, we use first principles calculations to study contrast effect of two well-known destabilization mechanisms, transformation into spinel-type structures cation mixing due transition metal migration. This is performed on oxides at A0.5MO2 composition, where A = (Na, Li) M a 3d metal. We find that while all Li0.5MO2 compounds have strong driving forces low kinetic paths transform...
Two series of novel intrinsically microporous polyimides were synthesized from 9,9′-spirobifluorene-2,2′-diamine (SBF) and its bromine-substituted analogue 3,3′-dibromo-9,9′-spirobifluorene-2,2′-diamine (BSBF) with three different dianhydrides (6FDA, PMDA, SPDA). All polymers exhibited high molecular weight, good solubility in common organic solvents, thermal stability. Bromine-substituted showed significantly increased gas permeabilities but slightly lower selectivities than the SBF-based...
Mixed-matrix membranes composed of mechanically strong, solution-processable polymers and highly selective ultramicroporous fillers (pore size < 7 Å) are superior candidate membrane materials for various energy-intensive gas separation applications because their structural tunability to achieve enhanced permeability gas–pair selectivity. However, industrial implementation has been severely hindered inefficient compatibility the polymer matrices crystalline results in poorly performing with...
A novel generic method is reported for the synthesis of a spirobifluorene-based dianhydride (SBFDA). An intrinsically microporous polyimide was obtained by polycondensation reaction with 3,3'-dimethylnaphthidine (DMN). The corresponding polymer (SBFDA-DMN) exhibited good solubility, excellent thermal stability, as well significant microporosity high BET surface area 686 m2/g. O2 permeability methanol-treated and air-dried membrane 1193 Barrer moderate O2/N2 selectivity 3.2. post-treatment...
Sorption and permeation properties of a hydroxyl-functionalized polymer with intrinsic microporosity are reported for aggressive sour natural gas separations.
A novel trimethyl-substituted carboxyl-containing polyimide was synthesized via a one-pot high-temperature polycondensation reaction of 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) and 3,5-diamino-2,4,6-trimethylbenzoic acid (TrMCA). The (6FDA-TrMCA) displayed Brunauer–Emmett–Teller surface area 260 m2 g–1, demonstrating intrinsic microporosity, in contrast to the related low-free volume COOH-functionalized 6FDA-DABA. Compared nonfunctionalized 6FDA analogue made from...