Publications by authors named "Guochang Li"
Carbonyl-containing organic electrodes have been widely considered as ideal substitutes for traditional inorganic compounds in sodium-ion batteries (SIBs) due to their excellent redox reversibility and structural tunability. However, constructing effective Na diffusion channels in these materials is very challenging. To address this issue, we design a new organic molecule, N,N'-bis(3,4,5-trimethoxyphenyl)-1,4,5,8-naphthalenediimide (NDI-DTMA), containing a donor-acceptor-donor (D-A-D) structure.
View Article and Find Full Text PDFMOF-Derived Co(Fe)OOH Slab and Co/MoN Nanosheet-Covered Hollow-Slab for Efficient Overall Water Splitting.
ACS Appl Mater Interfaces
December 2024
Article Synopsis
- The study focuses on creating cost-effective and stable electrocatalysts made from nonprecious metals for efficient water splitting to produce renewable hydrogen.
- It discusses the synthesis of transition metal oxyhydroxides and nitrides with varied shapes, specifically highlighting Fe-doped Co-MOF, which enhances oxygen evolution reaction (OER) performance.
- The findings show that using Co(Fe)OOH as the anode and Co/MoN as the cathode in an alkaline electrolyzer leads to a low cell voltage of 1.49 V with impressive long-term stability of 100 hours.
Single Atomic Cu-C Sites Catalyzed Interfacial Chemistry in Bi@C for Ultra-Stable and Ultrafast Sodium-Ion Batteries.
Angew Chem Int Ed Engl
January 2025
Article Synopsis
- Designing catalytic electrode materials is essential for improving battery performance, focusing on the interfacial chemistry at the electrode-electrolyte interface.
- A novel electrode, Bi@SA Cu-C, was created using metal-organic frameworks; it effectively enhances bond dissociation in the electrolyte and promotes a beneficial solid electrolyte interphase.
- The new electrode demonstrates impressive performance metrics, achieving a capacity of 351 mAh/g and an energy density of 265 Wh/kg, showcasing a promising approach for sodium-ion storage.
Article Synopsis
- Electrolytic seawater presents a sustainable and cost-effective method for hydrogen production, with transition metal phosphides serving as effective catalysts for water electrolysis.
- The study successfully synthesizes coated NiFeP nanocrystals with a unique porous rugby shape, utilizing Ar-H plasma to create these structures at low temperatures.
- The resulting NiFeP catalyst demonstrates impressive performance in alkaline conditions, showing excellent catalytic activity, corrosion resistance, and stability for over 100 hours, while theoretical calculations explain improved reaction efficiency through specific modifications.
Four new lycoctonine-type C-diterpenoid alkaloids from the whole plants of .
J Asian Nat Prod Res
May 2025
Article Synopsis
- Four new lycoctonine-type C-diterpenoid alkaloids, named kamaonensines H-K, were isolated from whole plants along with 12 previously known compounds.
- The kamaonensines feature a unique nitrone (imine N-oxide) structure that is rare in this context.
- Evaluation of compounds revealed that some exhibited strong anti-inflammatory effects, while others demonstrated significant cytotoxicity in RAW 264.7 macrophage cells.
Article Synopsis
- Doping heteroatoms like selenium and creating phosphorus vacancies in CoP-FeP improves its electronic structure and enhances reactivity.
- The resulting CoFe-P-Se demonstrates a high specific capacitance of 8.41 F cm in supercapacitor applications, with impressive energy and power densities, along with excellent cycle stability.
- When used as an OER electrode, CoFe-P-Se achieves low overpotentials and maintains stability for over 50 hours, supporting the potential for high-performance electrode development.
Article Synopsis
- Transition metal sulfides and selenides are widely used as electrode materials in supercapacitors, but their performance is limited by slow redox kinetics and structural issues during charge-discharge cycles.
- Researchers developed hollow CoS nanotubes and created dual-phase heterostructures by electro-depositing NiSe or CoSe on them, resulting in NiSe@CoS and CoSe@CoS configurations.
- These hybrid supercapacitors showed impressive areal capacitances and energy storage performance, along with excellent cycling stability over 5000 cycles, suggesting a promising pathway for improving supercapacitor efficiency through advanced material design.
Zeolitic Imidazolate Framework-Derived CoS@NiFe-LDH Core-Shell Heterostructure as Efficient Bifunctional Electrocatalyst for Water Splitting.
ACS Appl Mater Interfaces
February 2024
Article Synopsis
- The study focuses on creating efficient bifunctional electrocatalysts crucial for water splitting, specifically a CoS@NiFe-LDH core-shell structure.
- The CoS@NiFe-LDH/NF demonstrates strong catalytic performance and stability in oxygen evolution and hydrogen evolution reactions, with notable low overpotentials in 1 M KOH.
- DFT calculations reveal effective electron interaction at the core-shell interface, improving electron transfer and lowering energy barriers, which enhances overall electrocatalytic activity for water splitting.
Article Synopsis
- Transition metal sulfides, particularly a core-shell structure of MoO-intercalated LDHs on CoS nanotubes, show promise as effective electrode materials for supercapacitors due to their high conductivity and electrochemical performance.
- While they traditionally face issues with low rate performance and cycling stability, the optimized NiCoMo-LDH@CoS configuration demonstrated significant improvements, achieving an areal specific capacitance of 11 F cm and retaining 94.4% stability after 5000 cycles.
- Asymmetric supercapacitor devices using this optimized electrode and activated carbon achieved a high energy density of 0.94 mWh cm and maintained 89.4% stability after 5000 cycles, highlighting the composite's potential in advanced
Article Synopsis
- Layered double hydroxides (LDHs) are being researched as effective electrocatalysts for water splitting due to their economical and stable properties.
- Researchers developed three core-shell heterostructure electrocatalysts (NiCo@NiFe-LDH100/150/200) which showed promising results, with NiCo@NiFe-LDH150/NF having the best performance and stability.
- The study highlights the importance of strong electron interactions at the core-shell interface, which enhance electron conductivity and ion diffusion, thereby improving the electrocatalytic efficiency of the material for electrochemical water splitting.
A quaternary heterojunction nanoflower for significantly enhanced electrochemical water splitting.
Dalton Trans
September 2023
Article Synopsis
- Designing efficient electrocatalysts for water splitting is crucial for green hydrogen production, with a focus on a quaternary heterostructured material synthesized through hydrothermal reactions.
- The electrocatalyst, Ni(NO)(OH)/Ni(OH)/NiS/NiFe-LDH, shows improved oxygen evolution performance due to unique structural features and metal interactions, achieving a low overpotential of 223 mV.
- As both cathode and anode, it allows an alkaline electrolyzer to operate at 1.67 V for a current density of 10 mA cm, demonstrating excellent stability and durability.
Article Synopsis
- The study presents a new method for creating a self-supported Zn/Co-S@Ni(OH) electrode, leveraging a leaf-like zeolitic imidazolate framework to enhance performance.
- The core-shell structure of the electrode greatly improves electrical conductivity, active site availability, and charge transfer speed, resulting in impressive electrochemical properties.
- This electrode shows high capacitance in supercapacitors and excellent performance in oxygen evolution reactions, making it a significant advancement for energy storage and electrocatalysis applications.
Article Synopsis
- MOFs are hindered in their effectiveness for supercapacitors due to metal active sites being blocked by organic ligands, restricting electrochemical reactions.
- A novel approach was developed to create hollow metal sulfide/MOF heterostructures, which not only reduce volume expansion and improve the kinetics of metal sulfides but also expose more active sites for reactions.
- The CoS/Co-BDC MOF heterostructure demonstrated impressive electrochemical performance, achieving a high capacitance and energy density, making it a promising design for future electrochemical applications.
Article Synopsis
- Binary transition metal sulfides are favored for supercapacitors due to their enhanced electrochemical performance and active sites.
- The study utilized a two-step method to prepare CoNiS from a NiCo-MOF-74 template, preserving its original structure better than direct sulfidation.
- The resulting CoNiS exhibited high specific capacitance, excellent efficiency, and impressive cycling stability, making it a promising material for high-performance supercapacitors.
Article Synopsis
- Developing efficient electrocatalysts is essential for improving energy conversion technologies.
- The study focuses on a new S-doped Fe-N-C catalyst that enhances CO electroreduction by improving electron density and conductivity through heteroatom doping.
- Results show that this improved catalyst achieves high CO faradaic efficiency (93%) and partial current density (10.1 mA/cm²), making it a promising option for future energy applications.
Article Synopsis
- Layered double hydroxides (LDH) can be upgraded from alkaline supercapacitors to more effective cathodes for large cation storage in neutral electrolytes through a process called electrochemical activation.
- The interlayer space of NiCo-LDH is expanded by substituting nitrate ions with 1,4-benzenedicarboxylic anions (BDC), enhancing the storage efficiency for larger cations like Na, Mg, and Zn, while leaving lithium ion storage mostly unchanged.
- The BDC-pillared LDH (LDH-BDC) shows improved performance due to reduced resistances during charging and discharging, as confirmed by electrochemical analyses, and is used in an advanced zinc-ion supercapacitor that offers high energy density and
Article Synopsis
- Five new bis-tridentate Ir(III) complexes (Ir-1 to Ir-5) were created, featuring innovative N^N^C and N^C^N ligands for detailed scientific study.
- The UV-visible absorption studies show that these complexes have a significant charge transfer ability, absorbing light up to 550 nm while exhibiting long-lasting phosphorescence.
- The research indicates a strong reverse saturable absorption (RSA) effect under laser exposure, with Ir-5 being the most effective in optical power limiting (OPL), suggesting these complexes could be valuable in OPL applications.
Article Synopsis
- A composite electrode made of metal-organic frameworks and transition metal phosphides was created on a nickel foam substrate, resulting in impressive performance metrics.
- The hybrid supercapacitor device demonstrated high energy storage capability and durability, with notable charge-discharge stability over thousands of cycles.
- The study highlights the potential for using these new electrodes in practical energy storage applications, particularly due to their improved electrical properties from their unique structure and materials.
Article Synopsis
- Lithium-metal anodes face issues with dendrite formation at high currents, affecting their performance for practical use.
- A new method has been developed to create a network of thermally conductive AlN nanowires on polypropylene separators, which improves Li deposition, facilitates ion transport, and prevents dendrite growth.
- Tests show that the new Li|Li cell has an impressive lifespan of over 8000 hours and performs well even at high rates, indicating significant potential for durable and high-power lithium-metal batteries.
3D hierarchical carbon nanocages (hCNC) are becoming new platforms for advanced energy storage and conversion due to their unique structural characteristics, especially the combination of multiscale pore structure with high conductivity of sp carbon frameworks, which can promote the mass/charge synergetic transfer in various electrochemical processes. Herein, the MgO@ZnO composite-template method is developed to construct hCNC and nitrogen-doped hCNC (hNCNC), which integrates the advantages of the in situ MgO template method and ZnO self-sacrificing template method. The hierarchical MgO template provides the scaffold for depositing carbon nanocages, while the self-sacrificing ZnO template helps create abundant micropores while promoting the graphitization degree, so that the microstructures of the products are effectively regulated.
View Article and Find Full Text PDFArticle Synopsis
- Reducing sulfur hexafluoride (SF) in lithium batteries offers a dual benefit of tackling greenhouse gas emissions while achieving a high energy density of 3922 Wh/kg.
- The slow reaction rates of this reduction process are addressed by using cobalt phthalocyanine (CoPc) molecules on a porous carbon matrix, enhancing catalytic activity.
- The results show that these LiSF cells can achieve a discharge voltage of 2.82 V and a notable areal capacity of 25 mAh/cm², significantly improving performance compared to prior methods.
Aging Characteristics of Transformer Oil-Impregnated Insulation Paper Based on Trap Parameters.
Polymers (Basel)
April 2021
Article Synopsis
- Oil-impregnated insulation paper is crucial for transformer performance and affects the lifespan of power equipment; studying its aging under thermal stress is essential for maintenance.
- The study involved heating samples at 120 °C to represent different aging stages, using methods like pulsed electro-acoustic (PEA) to analyze space charge distribution and extract trap parameters.
- Results indicated that trap energy levels increase with aging due to various chemical changes, highlighting the importance of understanding these mechanisms for improving insulation materials.
Characterization of the complete chloroplast genome of 'Yunhongli No. 1'.
Mitochondrial DNA B Resour
July 2020
Article Synopsis
- 'Yunhongli No. 1' is a unique red pear variety known for its vibrant color and high quality, making it popular in the market.
- Using advanced Illumina high-throughput sequencing, researchers sequenced its chloroplast genome, which is 160,113 base pairs long and includes various types of genes.
- The genetic analysis established a phylogenetic relationship showing that 'Yunhongli No. 1' is more closely related to the hybrid pear × 'Greensis.'
Article Synopsis
- The study addresses the challenge of achieving high volumetric performance in carbon-based electrical double-layer capacitors (EDLCs) by creating collapsed N,S dual-doped carbon nanocages, which enhance density while slightly reducing specific surface area.
- The N,S dual-doping improves the carbon surface's polarity, resulting in better wettability and faster charge transfer, ultimately leading to improved performance metrics.
- The final optimized material demonstrates impressive capacitance and energy density values, making it competitive with traditional lead-acid batteries, while also offering significantly higher power density.
Transcription factor PyHY5 binds to the promoters of PyWD40 and PyMYB10 and regulates its expression in red pear 'Yunhongli No. 1'.
Plant Physiol Biochem
September 2020
Article Synopsis
- 'Yunhongli No. 1' is a distinct red pear variety known for its vibrant color and quality, driven by the synthesis of anthocyanin, a pigment responsible for its red hue.
- The study focuses on the transcription factor PyHY5, which acts as a key regulator in the anthocyanin biosynthesis pathway by interacting with other factors like MYB10 and WD40, and is localized in the nucleus.
- Experimental evidence shows PyHY5 binds to G-box motifs in the promoters of MYB10 and WD40, enhancing their expression and consequently increasing anthocyanin accumulation, leading to the pear's characteristic red color.