Search results for: Jim-Yang Lee

Items from 1 to 20 out of 134 results

article

Fast Polysulfide Conversion Catalysis and Reversible Anode Operation by A Single Cathode Modifier in Li‐Metal Anode‐Free Lithium‐Sulfur Batteries

Yun Zhao, Limin Huang, Dan Zhao, Jim Yang Lee

Angewandte Chemie International Edition > 62 > 36 > n/a - n/a

The two major issues confronting the commercialization of rechargeable lithium‐sulfur (Li−S) batteries are the sluggish kinetics of the sulfur electrochemical reactions on the cathode and inadequate lithium deposition/stripping reversibility on the anode. They are commonly mitigated with additives designed specifically for the anode and the cathode individually. Here, we report the use of a single...

article

Fast Polysulfide Conversion Catalysis and Reversible Anode Operation by A Single Cathode Modifier in Li‐Metal Anode‐Free Lithium‐Sulfur Batteries

Yun Zhao, Limin Huang, Dan Zhao, Jim Yang Lee

Angewandte Chemie > 135 > 36 > n/a - n/a

article

Plasmonic Oxygen‐Deficient TiO_2‐x Nanocrystals for Dual‐Band Electrochromic Smart Windows with Efficient Energy Recycling

Shengliang Zhang, Sheng Cao, Tianran Zhang, Jim Yang Lee

Advanced Materials > 32 > 43 > n/a - n/a

Dual‐band electrochromic smart windows capable of the spectrally selective modulation of visible (VIS) light and near‐infrared (NIR) can regulate solar light and solar heat transmittance to reduce the building energy consumption. The development of these windows is however limited by the number of available dual‐band electrochromic materials. Here, plasmonic oxygen‐deficient TiO_2‐x nanocrystals (NCs)...

article

A microporous carbon derived from metal‐organic frameworks for long‐life lithium sulfur batteries

Guochun Li, Xiangli Jiang, Chang Liu, Mingchao Song, more

International Journal of Energy Research > 44 > 3 > 2126 - 2136

A polyhedral microporous carbon derived from metal‐organic frameworks (ZIF‐8) could present good property for sulfur loading and trapping. A melting‐evaporation route was adopted to synthesize two sulfur/microporous carbon (S/MC) composites, of which sulfur content is controllable, and ether‐based or ester‐based electrolytes were used to evaluate the synthesized composites for the lithium sulfur batteries...

article

Reversible Crumpling of 2D Titanium Carbide (MXene) Nanocoatings for Stretchable Electromagnetic Shielding and Wearable Wireless Communication

Yang Li, Xi Tian, Si‐Ping Gao, Lin Jing, more

Advanced Functional Materials > 30 > 5 > n/a - n/a

In the emerging Internet of Things, stretchable antennas can facilitate wireless communication between wearable and mobile electronic devices around the body. The proliferation of wireless devices transmitting near the human body also raises interference and safety concerns that demand stretchable materials capable of shielding electromagnetic interference (EMI). Here, an ultrastretchable conductor...

article

Does size matter – What other factors are limiting the rate performance of Na3V2(PO4)3 cathode in sodium-ion batteries

Xi Jiang, Tianran Zhang, Jim Yang Lee

Journal of Power Sources > 2017 > 372 > C > 91-98

Na₃V₂(PO₄)₃ (NVP) is an extensively researched cathode material for the sodium-ion batteries (NIBs). Size reduction and nanocarbon coating are often used to improve its rate performance. These are strategies that have been proven highly effective for LiFePO₄ (LFP), a phosphate-based cathode material which is nowadays popular with the lithium-ion batteries. Nanocarbon coating is undoubtedly useful...

article

Combined mediator and electrochemical charging and discharging of redox targeting lithium-sulfur flow batteries

Jingfa Li, Liuqing Yang, Boyu Yuan, Guochun Li, more

Materials Today Energy > 2017 > 5 > C > 15-21

Li-S batteries have drawn increasing interest as the battery technology likely to succeed the Li-ion batteries. Current development is however hindered by some tenacious issues of the sulfur cathode; resulting in the use of excess conducting additive or operations in a smaller voltage window (where the active sulfur species are soluble). The battery energy density is significantly reduced by these...

article

The development of cobalt phosphate for bifunctional oxygen electrocatalysis in alkaline solution

Yi Zhan, Shiliu Yang, Meihua Lu, Zhaolin Liu, more

Electrochimica Acta > 2017 > 227 > C > 310-316

Most of the bifunctional, non-noble metal oxygen electrocatalysts for rechargeable metal-air batteries are based on transition metal oxides. Recent studies on metal phosphates have revealed their potential as another class of oxygen electrocatalysts. Among the metal phosphates Co₃(PO₄)₂ has demonstrated fairly good activity for both the oxygen evolution reaction (OER) and the oxygen reduction reaction...

article

A metal-free ORR/OER bifunctional electrocatalyst derived from metal-organic frameworks for rechargeable Zn-Air batteries

Yuhong Qian, Zhigang Hu, Xiaoming Ge, Shiliu Yang, more

Carbon > 2017 > 111 > C > 641-650

Rechargeable Zn-air batteries are under intensive studies because of their high-energy density, low cost, and safety. However, their wide application is prevented by several remaining technical issues, one of which is the lack of suitable bifunctional cathodic catalysts for oxygen reduction reaction (ORR) during discharging and oxygen evolution reaction (OER) during charging. Due to low material cost...

article

Evaluating the viability of double-skin thin film composite membranes in forward osmosis processes

Zhengzhong Zhou, Jim Yang Lee

Journal of Membrane Science > 2016 > 502 > C > 65-75

Internal concentration polarization (ICP) and membrane fouling are two major factors impairing the performance of forward osmosis membranes. Their relative severity differs in the two operating modes of forward osmosis. The PRO mode (where the skin layer is facing the draw solution) is less susceptible to ICP, and as a result, produces a higher water flux than the FO mode (where the skin layer is...

article

Poly(diallyldimethylammonium chloride)-assisted synthesis of MoS2/graphene composites with enhanced electrochemical performances for reversible lithium storage

Jianbo Ye, Weixiang Chen, Qiannan Chen, Zheting Yu, more

Electrochimica Acta > 2016 > 190 > C > 538-547

The MoS₂/graphene composites were synthesized by a hydrothermal route in the presence of graphene oxide sheets with assistance from poly(diallyldimethylammonium chloride) (PDDA). The results of characterizations show that the MoS₂/graphene composites exhibit a graphene-like morphology with interconnected network, in which single- or few-layer MoS₂ sheets are homogenously dispersed and well anchored...

article

Hydrodynamic Voltammetry at a Rocking Disc Electrode: Theory versus Experiment

Sunyhik D. Ahn, Karthik Somasundaram, H.Viet Nguyen, Erik Birgersson, more

Electrochimica Acta > 2016 > 188 > C > 837-844

Rocking disc electrode voltammetry (RoDE) is introduced as an experimentally convenient and versatile alternative to rotating disc voltammetry. A 1.6mm diameter disc electrode is employed with an overall rocking angle of θ=90degree applied over a frequency range of 0.83Hz to 25Hz. For a set of known aqueous redox systems (the oxidation of Fe(CN)₆^4⿿ in 1M KCl_, the reduction of Ru(NH₃)₆³⁺ in 0.1M KCl...

article

l-Cysteine-assisted hydrothermal synthesis of nickel disulfide/graphene composite with enhanced electrochemical performance for reversible lithium storage

Qiannan Chen, Weixiang Chen, Jianbo Ye, Zhen Wang, more

Journal of Power Sources > 2015 > 294 > C > 51-58

NiS₂/graphene composite is synthesized by a facile hydrothermal reaction between NiCl₂ and l-cysteine in the presence of graphene oxide sheets. l-Cysteine serves as both the sulfur source for NiS₂ and reductant for reduction of graphene oxide sheets. The reduced graphene oxides can be used as a platform for growth of NiS₂ particles and restrain NiS₂ from agglomerating during hydrothermal process....

article

Counterion‐Assisted Shaping of Nanocluster Supracrystals

Qiaofeng Yao, Yue Yu, Xun Yuan, Yong Yu, more

Angewandte Chemie International Edition > 54 > 1 > 184 - 189

Ag₄₄(p‐MBA)₃₀⁴⁻ (p‐MBA=para‐mercaptobenzoic acid) nanocluster (NC) supracrystals (SCs) with customizable shapes can be obtained by simply altering the type and concentration of the counterions of the p‐MBA ligands in the dimethylsulfoxide (DMSO)/water crystallization system. Changing the counterion of the p‐MBA ligand from H⁺ to Cs⁺ eliminates the directional hydrogen bonds in the SCs, resulting in...

article

Counterion‐Assisted Shaping of Nanocluster Supracrystals

Qiaofeng Yao, Yue Yu, Xun Yuan, Yong Yu, more

Angewandte Chemie > 127 > 1 > 186 - 191

article

Ultrathin carbon nanopainting of LiFePO4 by oxidative surface polymerization of dopamine

Bo Ding, Wei Chin Tang, Ge Ji, Yue Ma, more

Journal of Power Sources > 2014 > 265 > Complete > 239-245

The common strategy to address the low electronic conductivity of LiFePO ₄ is to downsize LiFePO ₄ and to coat the nanocrystal with conductive carbon film. The major issues with existing carbon coating techniques are thickness and quality control. This paper reports a facile carbon coating method which can provide ultrathin, uniform and fully encapsulating carbon coating on LiFePO...

article

Gemini surfactant assisted hydrothermal synthesis of nanotile-like MoS2/graphene hybrid with enhanced lithium storage performance

Lin Ma, Jianbo Ye, Weixiang Chen, Dongyun Chen, more

Nano Energy > 2014 > 10 > C > 144-152

A Gemini surfactant (N-dodecyl propylenediamine γ-diquaternium bromide) assisted hydrothermal route was presented for the facile synthesis of nanotile-like molybdenum disulfide/graphene (NTL-MoS₂/G) hybrid. The effect of the Gemini surfactant on the microstructure and electrochemical lithium storage performance of the NTL-MoS₂/G hybrid is investigated. It is found that MoS₂ sheets in the hybrid display...

article

Cationic surfactant-assisted hydrothermal synthesis of few-layer molybdenum disulfide/graphene composites: Microstructure and electrochemical lithium storage

Lin Ma, Guochuang Huang, Weixiang Chen, Zhen Wang, more

Journal of Power Sources > 2014 > 264 > Complete > 262-271

Few-layer molybdenum disulfide/graphene (FL-MoS ₂ /GNS) composites are fabricated by a facile hydrothermal route and a post-annealing with the assistance of various cationic surfactants (dodecyltrimethylammonium bromide, DTAB; octyltrimethylammonium bromide, OTAB; and tetrabutylammonium bromide, TBAB), which have different alkyl-chain lengths and stereo configurations. The effects of these...

article

Energy storage: Materials and processes

Jun Yang, Jim Yang Lee, Peter Hall, Yulong Ding

Particuology > 2014 > 15 > Complete > 1

article

Thin film composite forward-osmosis membranes with enhanced internal osmotic pressure for internal concentration polarization reduction

Zhengzhong Zhou, Jim Yang Lee, Tai-Shung Chung

Chemical Engineering Journal > 2014 > 249 > Complete > 236-245

Thin-film composite (TFC) forward-osmosis (FO) membranes with enhanced internal osmotic pressure (IOP) were used to reduce internal concentration polarization in this study. These TFC membranes contained a selective polyamide layer deposited by interfacial polymerization on a support substrate cast from a polymer blend of polysulfone (PSf) and sulfonated poly(phenylene oxide) (SPPO). The immobilized...

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INFONA - science communication portal

Search results for: Jim-Yang Lee

Fast Polysulfide Conversion Catalysis and Reversible Anode Operation by A Single Cathode Modifier in Li‐Metal Anode‐Free Lithium‐Sulfur Batteries

Fast Polysulfide Conversion Catalysis and Reversible Anode Operation by A Single Cathode Modifier in Li‐Metal Anode‐Free Lithium‐Sulfur Batteries

Plasmonic Oxygen‐Deficient TiO_2‐x Nanocrystals for Dual‐Band Electrochromic Smart Windows with Efficient Energy Recycling

A microporous carbon derived from metal‐organic frameworks for long‐life lithium sulfur batteries

Reversible Crumpling of 2D Titanium Carbide (MXene) Nanocoatings for Stretchable Electromagnetic Shielding and Wearable Wireless Communication

Does size matter – What other factors are limiting the rate performance of Na3V2(PO4)3 cathode in sodium-ion batteries

Combined mediator and electrochemical charging and discharging of redox targeting lithium-sulfur flow batteries

The development of cobalt phosphate for bifunctional oxygen electrocatalysis in alkaline solution

A metal-free ORR/OER bifunctional electrocatalyst derived from metal-organic frameworks for rechargeable Zn-Air batteries

Evaluating the viability of double-skin thin film composite membranes in forward osmosis processes

Poly(diallyldimethylammonium chloride)-assisted synthesis of MoS2/graphene composites with enhanced electrochemical performances for reversible lithium storage

Hydrodynamic Voltammetry at a Rocking Disc Electrode: Theory versus Experiment

l-Cysteine-assisted hydrothermal synthesis of nickel disulfide/graphene composite with enhanced electrochemical performance for reversible lithium storage

Counterion‐Assisted Shaping of Nanocluster Supracrystals

Counterion‐Assisted Shaping of Nanocluster Supracrystals

Ultrathin carbon nanopainting of LiFePO4 by oxidative surface polymerization of dopamine

Gemini surfactant assisted hydrothermal synthesis of nanotile-like MoS2/graphene hybrid with enhanced lithium storage performance

Cationic surfactant-assisted hydrothermal synthesis of few-layer molybdenum disulfide/graphene composites: Microstructure and electrochemical lithium storage

Energy storage: Materials and processes

Thin film composite forward-osmosis membranes with enhanced internal osmotic pressure for internal concentration polarization reduction

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