Junfei Duan

ORCID: 0000-0003-4357-5587
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About
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Research Areas
  • Advancements in Battery Materials
  • Advanced Battery Materials and Technologies
  • Supercapacitor Materials and Fabrication
  • Advanced Battery Technologies Research
  • Advanced battery technologies research
  • Fuel Cells and Related Materials
  • Electrocatalysts for Energy Conversion
  • Extraction and Separation Processes
  • Quantum Dots Synthesis And Properties
  • Silicon Nanostructures and Photoluminescence
  • Nanomaterials for catalytic reactions
  • Mesoporous Materials and Catalysis
  • Boron and Carbon Nanomaterials Research
  • Photonic Crystals and Applications
  • Machine Learning in Materials Science
  • Liquid Crystal Research Advancements
  • GaN-based semiconductor devices and materials
  • Nanocluster Synthesis and Applications
  • Thermal Expansion and Ionic Conductivity
  • Advanced Thermoelectric Materials and Devices
  • Block Copolymer Self-Assembly
  • Thermal properties of materials
  • Inorganic Chemistry and Materials
  • Advanced Materials and Mechanics
  • Dielectric properties of ceramics

Shanxi University
2025

Changsha University of Science and Technology
2015-2024

Nanjing University
2013-2018

Ministry of Education
2018

Ministry of Education and Child Care
2014

Nanjing Library
2014

University of California, Los Angeles
1997

Abstract A critical challenge in the commercialization of layer‐structured Ni‐rich materials is fast capacity drop and voltage fading due to interfacial instability bulk structural degradation cathodes during battery operation. Herein, with guidance theoretical calculations migration energy difference between La Ti from surface inside LiNi 0.8 Co 0.1 Mn O 2 , for first time, Ti‐doped 4 NiLiO 8 ‐coated are rationally designed prepared, via a simple convenient dual‐modification strategy...

10.1002/adfm.201808825 article EN Advanced Functional Materials 2019-02-07

Residual Li and oxygen vacancies in Ni-rich cathode materials have a great influence on electrochemical performance, yet their role is still poorly understood. Herein, by simply adjusting the flow during high-temperature sintering process, some Li2O can be carried into exhaust gas contents of residual LiNi0.825Co0.115Mn0.06O2 cathodes accurately controlled. reduces surficial Li+ diffusion coefficient, thereby limiting rate property cathode. Oxygen affect release energy crystal, lowest found...

10.1021/acsami.1c06550 article EN ACS Applied Materials & Interfaces 2021-08-31

Abstract Polydimethylsiloxane (PDMS) has been widely used in flexible electronics, soft robotics, and bioelectronics. However, the fabrication of PDMS‐based devices mostly relied on conventional approaches, such as casting molding, thereby limiting their potential. Here we fabricate composites with programmable microstructures by direct ink writing realize practical functionalities four‐dimensional (4D) printing. The mechanical, thermomechanical magnetic properties three‐dimensional‐printed...

10.1002/idm2.12027 article EN Interdisciplinary materials 2022-07-05

Although LiNi0.8Co0.1Mn0.1O2 is attracting increasing attention on account of its high specific capacity, the moderate cycle lifetime still hinders large-scale commercialization applications. Herein, Ti-doped compounds are successfully synthesized. The Li(Ni0.8Co0.1Mn0.1)0.99Ti0.01O2 sample exhibits best electrochemical performance. Under voltage range 2.7-4.3 V, it maintains a reversible capacity 151.01 mAh·g-1 with retention 83.98% after 200 cycles at 1 C. Electrochemical impedance...

10.3389/fchem.2019.00500 article EN cc-by Frontiers in Chemistry 2019-07-16

Abstract Embedding the fragmented selenium into micropores of carbon host has been regarded as an effective strategy to change Li–Se chemistry by a solid–solid mechanism, thereby enabling excellent cycling stability in batteries using carbonate electrolyte. However, effect spatial confinement electrochemical behavior carbon/selenium materials remains ambiguous. A comparative study both microporous (MiC) and mesoporous carbons (MeC) with narrow pore size distribution hosts is herein reported....

10.1002/smll.202000266 article EN Small 2020-03-29

The garnet Li7La3Zr2O12 (LLZO) has been widely investigated because of its high conductivity, wide electrochemical window, and chemical stability with regards to lithium metal. However, the usual preparation process LLZO requires high-temperature sintering for a long time lot mother powder compensate evaporation. In this study submicron Li6.6La3Zr1.6Nb0.4O12 (LLZNO) powder-which stable cubic phase activity-was prepared using conventional solid-state reaction attrition milling process, Li...

10.3390/ma13030560 article EN Materials 2020-01-24

The high energy density lithium ion batteries are being pursued because of their extensive application in electric vehicles with a large mileage and storage station long life. So, increasing the charge voltage becomes strategy to improve density. But it brings some harmful structural stability. In order find equilibrium between capacity structure stability, K Cl co-doped LiNi0.5Co0.2Mn0.3O2 (NCM) cathode materials designed based on defect theory, prepared by solid state reaction. is...

10.3389/fchem.2018.00643 article EN cc-by Frontiers in Chemistry 2019-01-08

In the family of high-performance cathode materials for lithium-ion batteries, lithium-rich layered oxides come out in front because a high reversible capacity exceeding 250 mAh g–1. However, long-term energy retention and densities oxide require stable structure with large surface areas. Here we propose "bubble template" reaction to build "honeycomb-like" hollow microsphere architecture Li1.2Mn0.52Ni0.2Co0.08O2 material. Our material is designed ca. 8-μm-sized secondary particles highly...

10.1021/acsami.7b07542 article EN ACS Applied Materials & Interfaces 2017-08-22

Carbon-based electrocatalysts with single metal sites hold great potential for mechanism exploration via mimicking molecular catalysts, due to their distinct catalytic sites. In addition atoms, the neighboring nonmetal heteroatoms such as N, S, and O which are widely detected in carbon-based single-atom may also contribute enhancing electrochemical activity of single-metal centers. this work, boosting effect O-doping toward oxygen reduction reaction (ORR) was evaluated by both experimental...

10.1021/acsami.9b18510 article EN ACS Applied Materials & Interfaces 2019-11-08

Towards practical lithium–sulfur batteries, a highly efficient sulfur host material based on intertwined carbon-nanotubes (CNTs) and defective Prussian blue (PB) nanocrystals is developed.

10.1039/c9ta11209j article EN Journal of Materials Chemistry A 2019-12-10
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