Search results for: Huanan Duan

Items from 1 to 20 out of 34 results

article

Sn‐O Dual‐Substituted Chlorine‐Rich Argyrodite Electrolyte with Enhanced Moisture and Electrochemical Stability

Guoyao Li, Shaoping Wu, Hongpeng Zheng, Yu Yang, more

Advanced Functional Materials > 33 > 11 > n/a - n/a

Chlorine‐rich argyrodite sulfides are one of the most promising solid electrolytes for all‐solid‐state batteries owing to their remarkable ionic conductivity and decent mechanical properties. However, their application has been limited by imperfections such as moisture instability and poor electrochemical stability. Herein, a Sn and O is proposed dual‐substitution strategy in Li_5.4PS_4.4Cl_1.6 (LPSC)...

article

Influence of dry‐ and wet‐milled LLZTO particles on the sintered pellets

Hongpeng Zheng, Guoyao Li, Hezhou Liu, Yongmin Wu, more

Journal of the American Ceramic Society > 106 > 1 > 274 - 284

A Ta‐doped Li₇La₃Zr₂O₁₂ (LLZTO) solid electrolyte is a promising candidate for all‐solid‐state lithium battery due to its high ionic conductivity and stability against lithium metal. In this work, physicochemical properties of both dry‐ and wet‐milled LLZTO particles were investigated. Based on X‐ray diffraction, Fourier transform–infrared, thermogravimetric analysis, and scanning electron microscopy...

article

Origin of Lithiophilicity of Lithium Garnets: Compositing or Cleaning?

Hongpeng Zheng, Guoyao Li, Runxin Ouyang, Yao Han, more

Advanced Functional Materials > 32 > 41 > n/a - n/a

Garnet‐type Li_6.5La₃Zr_1.5Ta_0.5O₁₂ (LLZTO), a promising solid‐state electrolyte, is reported to exhibit lithiophobicity. Herein, it is demonstrated that the origin of the lithiophobicity is closely related to the surface compositions of both the lithium and LLZTO. Surface impurities with high melting points such as Li₂O, Li₂CO₃, LiOH, or LiF inhibit the wettability between lithium metal and LLZTO,...

article

Intrinsic Lithiophilicity of Li–Garnet Electrolytes Enabling High‐Rate Lithium Cycling

Hongpeng Zheng, Shaoping Wu, Ran Tian, Zhenming Xu, more

Advanced Functional Materials > 30 > 6 > n/a - n/a

Solid‐state lithium batteries are widely considered as next‐generation lithium‐ion battery technology due to the potential advantages in safety and performance. Among the various solid electrolyte materials, Li–garnet electrolytes are promising due to their high ionic conductivity and good chemical and electrochemical stabilities. However, the high electrode/electrolyte interfacial impedance is one...

article

High‐Coulombic‐Efficiency Carbon/Li Clusters Composite Anode without Precycling or Prelithiation

Ran Tian, Huanan Duan, Yiping Guo, Hua Li, more

Small > 14 > 33 > n/a - n/a

Lithium metal has attracted much research interest as a possible anode material for high‐energy‐density lithium‐ion batteries in recent years. However, its practical use is severely limited by uncontrollable deposition, volume expansion, and dendrite formation. Here, a metastable state of Li, Li cluster, that forms between LiC₆ and Li dendrites when over‐lithiating carbon cloth (CC) is discovered...

article

Self‐Healing Shape Memory PUPCL Copolymer with High Cycle Life

Hafeez Ur Rehman, Yujie Chen, Mikael S. Hedenqvist, Hua Li, more

Advanced Functional Materials > 28 > 7 > n/a - n/a

New polyurethane‐based polycaprolactone copolymer networks, with shape recovery properties, are presented here. Once deformed at ambient temperature, they show 100% shape fixation until heated above the melting point, where they recover the initial shape within 22 s. In contrast to current shape memory materials, the new materials do not require deformation at elevated temperature. The stable polymer...

article

3D composites of ZnSnO₃ nanoplates/reduced graphene oxide aerogels as an advanced lithium-ion battery anode

Ji Xia, Yiping Guo, Ran Tian, Runjiang Guo, more

Journal of Materials Science: Materials in Electronics > 2018 > 29 > 7 > 5299-5306

Zinc-based bimetal oxides have received considerable attention as anode for lithium-ion batteries (LIBs). A one-pot self-assembly hydrothermal method is developed for the fabrication of 3D hierarchical structure aerogels from zinc stannate (ZnSnO₃) and reduced graphene oxide (rGO). 3D interconnected porous structure with ZnSnO₃ hexagon nanoplates uniformly dispersed on graphene sheets has been constructed...

article

Ternary oxide BaSnO3 nanoparticles as an efficient electron-transporting layer for planar perovskite solar cells

Chongyang Sun, Lin Guan, Yiping Guo, Bijun Fang, more

Journal of Alloys and Compounds > 2017 > 722 > C > 196-206

Organic-inorganic hybrid perovskites are a promising candidate for fabricating high-efficiency solar cells. In this work, well-dispersed ternary oxide BaSnO₃ (BSO) nanoparticles with high crystallinity were successfully synthesized by a facile peroxide-precipitate route. And then BSO was first used as an efficient electron-transporting layer in planar perovskite solar cells. Influences of the coverage,...

article

Reaction mechanisms of lithium garnet pellets in ambient air: The effect of humidity and CO₂

Wenhao Xia, Biyi Xu, Huanan Duan, Xiaoyi Tang, more

Journal of the American Ceramic Society > 100 > 7 > 2832 - 2839

Li₇La₃Zr₂O₁₂ (LLZO) has been reported to react in humid air to form Li₂CO₃ on the surface, which decreases ionic conductivity. To study the reaction mechanism, 0.5‐mol Ta‐doped LLZO (0.5Ta–LLZO) pellets are exposed in dry (humidity ~5%) and humid air (humidity ~80%) for 6 weeks, respectively. After exposure in humid air, the formation of Li₂CO₃ on the pellet surface is confirmed experimentally and...

article

Li3PO4-added garnet-type Li6.5La3Zr1.5Ta0.5O12 for Li-dendrite suppression

Biyi Xu, Wenlong Li, Huanan Duan, Haojing Wang, more

Journal of Power Sources > 2017 > 354 > C > 68-73

This paper proposes a strategy to stabilize the garnet/Li interface by introducing Li₃PO₄ as an additive in garnet-type Li_6.5La₃Zr_1.5Ta_0.5O₁₂. The Li₃PO₄-added Li_6.5La₃Zr_1.5Ta_0.5O₁₂ electrolyte exhibits a room-temperature Li-ion conductivity of 1.4 × 10⁻⁴ S cm⁻¹, which is less than that of the Li₃PO₄-free counterparts (4.6 × 10⁻⁴ S cm⁻¹). However, the presence of Li₃PO₄ improves the interfacial compatibility...

article

Composition induced rhombohedral–tetragonal phase boundary and high piezoelectric activity in (K0.48,Na0.52) (Nb(1-x)Sbx)O3 - 0.05Ca0.2(Bi0.5,Na0.5) 0.8ZrO3 lead-free piezoelectric ceramics

Di Pan, Yiping Guo, Xiuwu Fu, Runjiang Guo, more

Solid State Communications > 2017 > 259 > C > 29-33

New lead-free piezoelectric ceramics (K_0.48,Na_0.52) (Nb_(1-x)Sb_x)O₃ −0.05Ca_0.2(Bi_0.5,Na_0.5) _0.8ZrO₃ (KNNS_x-CBNZ) were fabricated by traditional solid-state sintering process. The effects of Sb content on phase structures and electrical properties of the KNNS_x-CBNZ ceramics were studied. Because Sb⁵⁺ can increase the rhombohedral-orthorhombic phase transition temperature and decrease orthorhombic-tetragonal...

article

Influence of sintering additives on Li+ conductivity and electrochemical property of perovskite-type Li3/8Sr7/16Hf1/4Ta3/4O3

Biyi Xu, Bing Huang, Hezhou Liu, Huanan Duan, more

Electrochimica Acta > 2017 > 234 > Complete > 1-6

Cubic perovskite–type oxide Li_3/8Sr_7/16Hf_1/4Ta_3/4O₃ (LSHT) is a promising solid electrolyte material for next–generation Li–ion batteries such as all–solid–state Li batteries and Li–redox flow batteries due to its high room–temperature Li–ion conductivity and good chemical compatibility with commercial organic liquid electrolyte. High relative density is another important requirement for these applications...

article

Facile preparation of hierarchical titanium silicalite-1 (TS-1) with efficient oxidation of cyclic alkenes using PVA modified MWCNTs as templates

Qi Du, Yiping Guo, Huanan Duan, Hua Li, more

Journal of Alloys and Compounds > 2017 > 699 > C > 386-391

Hierarchical TS-1 (HTS-1) with highly connective mesoporous channels has been successfully synthesized through a simple one-pot method using polyvinyl alcohol (PVA) modified multi-wall carbon nanotubes as templates. The synthesized samples are characterized by X-ray diffraction, UV–vis spectra, scanning electron microscopy, transmission electron microscopy, FT-IR spectra and N₂ adsorption/desorption...

article

Phase structure, microstructure, and piezoelectric properties of potassium-sodium niobate-based lead-free ceramics modified by Ca

Di Pan, Yiping Guo, Kai Zhang, Huanan Duan, more

Journal of Alloys and Compounds > 2017 > 693 > C > 950-954

In this work, (K_0.48Na_0.52)NbO₃−0.05Ca_x(Bi_0.5Na_0.5)_1−xZrO₃ lead-free piezoelectric ceramics were prepared by a conventional solid-state sintering method. The effects of Ca content on their phase structure, microstructures, and piezoelectric properties were systematically studied. With the increasing of Ca content, the rhombohedral-orthorhombic phase temperature gradually increases and Curie temperature...

article

Synthesis of hierarchical TS-1 zeolite via a novel three-step crystallization method and its excellent catalytic performance in oxidative desulfurization

Qi Du, Yiping Guo, Huanan Duan, Hua Li, more

Fuel > 2017 > 188 > C > 232-238

Hierarchical TS-1 (HTS-1) zeolite has been successfully synthesized through a novel three-step crystallization method by using a cheap and eco-friendly polymer PVA as the mesopore template. The HTS-1 particles possess an interesting stacking structure and are constructed of smaller crystals with an average diameter of 30nm. The mesopores of HTS-1 are formed by the stacking of the smaller TS-1 nanocrystals...

article

Hybrid Polymer/Garnet Electrolyte with a Small Interfacial Resistance for Lithium‐Ion Batteries

Yutao Li, Biyi Xu, Henghui Xu, Huanan Duan, more

Angewandte Chemie International Edition > 56 > 3 > 753 - 756

Li₇La₃Zr₂O₁₂‐based Li‐rich garnets react with water and carbon dioxide in air to form a Li‐ion insulating Li₂CO₃ layer on the surface of the garnet particles, which results in a large interfacial resistance for Li‐ion transfer. Here, we introduce LiF to garnet Li_6.5La₃Zr_1.5Ta_0.5O₁₂ (LLZT) to increase the stability of the garnet electrolyte against moist air; the garnet LLZT‐2 wt % LiF (LLZT‐2LiF)...

article

Hybrid Polymer/Garnet Electrolyte with a Small Interfacial Resistance for Lithium‐Ion Batteries

Yutao Li, Biyi Xu, Henghui Xu, Huanan Duan, more

Angewandte Chemie > 129 > 3 > 771 - 774

article

In situ preparation of carbon/Fe3C composite nanofibers with excellent electromagnetic wave absorption properties

Chongyang Sun, Yiping Guo, Xuehui Xu, Qi Du, more

Composites Part A: Applied Science and Manufacturing > 2017 > 92 > C > 33-41

Poly(vinyl pyrrolidone) (PVP)-based carbon/Fe₃C composite nanofibers (C/Fe₃C CNFs) have been successfully prepared by carbonization of as-electrospun PVP/ferric nitrate nanofibers. Unlike the pristine PVP nanofibers, the PVP/ferric nitrate nanofibers can retain fibers structure after carbonization, in which Fe₃C nanoparticles are well-dispersed. More importantly, the as-prepared wax composites exhibit...

article

A facile method to fabricate polyurethane based graphene foams/epoxy/carbon nanotubes composite for electro-active shape memory application

Jie Zhou, Hua Li, Weiwei Liu, Roberto Dugnani, more

Composites Part A: Applied Science and Manufacturing > 2016 > 91 > P1 > 292-300

Shape memory polymers (SMPs) have attracted the attention of both the industry and academia due to the fact that they can deform and fix into a temporary shape, and recover their permanent, original shape upon exposure to an external stimulus. In this work we propose a novel, shape memory three-dimensional (3D) polyurethane-based (PU) graphene foam (PGF)/epoxy/carbon nanotubes (PGEC) composite. The...

article

Stretchable, strong and self-healing hydrogel by oxidized CNT-polymer composite

Hafeez Ur Rehman, Yujie Chen, Yunlong Guo, Qi Du, more

Composites Part A: Applied Science and Manufacturing > 2016 > 90 > C > 250-260

Acrylamide hydrogel made from poly-acryloyl-6-amino caproic acid (PAACA) was reinforced with functional carbon nanotubes which strengthen composite four times more compare to PAACA, pure hydrogel. Oscillatory rheological experiments improved the special strength and reversible behavior of composite. Structure features and internal cross linking density of the composite were observed by allowing swelling...

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INFONA - science communication portal

Search results for: Huanan Duan

Sn‐O Dual‐Substituted Chlorine‐Rich Argyrodite Electrolyte with Enhanced Moisture and Electrochemical Stability

Influence of dry‐ and wet‐milled LLZTO particles on the sintered pellets

Origin of Lithiophilicity of Lithium Garnets: Compositing or Cleaning?

Intrinsic Lithiophilicity of Li–Garnet Electrolytes Enabling High‐Rate Lithium Cycling

High‐Coulombic‐Efficiency Carbon/Li Clusters Composite Anode without Precycling or Prelithiation

Self‐Healing Shape Memory PUPCL Copolymer with High Cycle Life

3D composites of ZnSnO₃ nanoplates/reduced graphene oxide aerogels as an advanced lithium-ion battery anode

Ternary oxide BaSnO3 nanoparticles as an efficient electron-transporting layer for planar perovskite solar cells

Reaction mechanisms of lithium garnet pellets in ambient air: The effect of humidity and CO₂

Li3PO4-added garnet-type Li6.5La3Zr1.5Ta0.5O12 for Li-dendrite suppression

Composition induced rhombohedral–tetragonal phase boundary and high piezoelectric activity in (K0.48,Na0.52) (Nb(1-x)Sbx)O3 - 0.05Ca0.2(Bi0.5,Na0.5) 0.8ZrO3 lead-free piezoelectric ceramics

Influence of sintering additives on Li+ conductivity and electrochemical property of perovskite-type Li3/8Sr7/16Hf1/4Ta3/4O3

Facile preparation of hierarchical titanium silicalite-1 (TS-1) with efficient oxidation of cyclic alkenes using PVA modified MWCNTs as templates

Phase structure, microstructure, and piezoelectric properties of potassium-sodium niobate-based lead-free ceramics modified by Ca

Synthesis of hierarchical TS-1 zeolite via a novel three-step crystallization method and its excellent catalytic performance in oxidative desulfurization

Hybrid Polymer/Garnet Electrolyte with a Small Interfacial Resistance for Lithium‐Ion Batteries

Hybrid Polymer/Garnet Electrolyte with a Small Interfacial Resistance for Lithium‐Ion Batteries

In situ preparation of carbon/Fe3C composite nanofibers with excellent electromagnetic wave absorption properties

A facile method to fabricate polyurethane based graphene foams/epoxy/carbon nanotubes composite for electro-active shape memory application

Stretchable, strong and self-healing hydrogel by oxidized CNT-polymer composite

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