نتایج جستجو برای: polysulfide

تعداد نتایج: 707  

Journal: :NIPPON GOMU KYOKAISHI 1970

2016
Na He Lei Zhong Min Xiao Shuanjin Wang Dongmei Han Yuezhong Meng

Sulfur is a promising cathode material with a high theoretical capacity of 1672 mAh g-1, however, the practical energy density of Li-S battery is far away from such promising due to its low active material utilization and low sulfur loading. Moreover, the challenges of the low electrical conductivity of sulfur and the high solubility of polysulfide intermediates still hinder its practical appli...

Journal: :Nanotechnology 2009
Sixto Giménez Iván Mora-Seró Lorena Macor Nestor Guijarro Teresa Lana-Villarreal Roberto Gómez Lina J Diguna Qing Shen Taro Toyoda Juan Bisquert

Solar cells based on a mesoporous structure of TiO2 and the polysulfide redox electrolyte were prepared by direct adsorption of colloidal CdSe quantum dot light absorbers onto the oxide without any particular linker. Several factors cooperate to improve the performance of quantum-dot-sensitized solar cells: an open structure of the wide bandgap electron collector, which facilitates a higher cov...

2016
Zhi-Zheng Yang Hui-Yuan Wang Lun Lu Cheng Wang Xiao-Bin Zhong Jin-Guo Wang Qi-Chuan Jiang

Hierarchical TiO2 micron spheres assembled by nano-plates were prepared through a facile hydrothermal route. Chemical tuning of the TiO2 through hydrogen reduction (H-TiO2) is shown to increase oxygen-vacancy density and thereby modifies the electronic properties. H-TiO2 spheres with a polar surface serve as the surface-bound intermediates for strong polysulfides binding. Under the restricting ...

Journal: :Nano letters 2011
Juchen Guo Yunhua Xu Chunsheng Wang

The commercialization of lithium-sulfur batteries is hindered by low cycle stability and low efficiency, which are induced by sulfur active material loss and polysulfide shuttle reaction through dissolution into electrolyte. In this study, sulfur-impregnated disordered carbon nanotubes are synthesized as cathode material for the lithium-sulfur battery. The obtained sulfur-carbon tube cathodes d...

2013
Yuan Yang Guangyuan Zheng Yi Cui

Large-scale energy storage represents a key challenge for renewable energy and new systems with low cost, high energy density and long cycle life are desired. In this article, we develop a new lithium/ polysulfide (Li/PS) semi-liquid battery for large-scale energy storage, with lithium polysulfide (Li2S8) in ether solvent as a catholyte and metallic lithium as an anode. Unlike previous work on ...

2011
Yongguang Zhang Yan Zhao Kyung Eun Sun P. Chen

This paper reviews different modification methods to cathode, anode and electrolyte materials in view of their electrochemical properties for application in lithium/sulfur batteries. In the sulfur electrode, carbonaceous materials, conductive polymer materials, and metal oxide adsorbing materials are employed to enhance conductivity and reduce polysulfide dissolution. The effects of anodes and ...

Journal: :Dalton transactions 2016
Marcel Kühling Robert McDonald Phil Liebing Liane Hilfert Michael J Ferguson Josef Takats Frank T Edelmann

Well-defined lanthanide polysulfide complexes containing S4(2-) and S5(2-) ligands, the samarium(iii) pentasulfide complex Sm(Tp(iPr2))(κ(1)-3,5-(i)Pr2Hpz)(S5) and the tetrasulfide-bridged binuclear ytterbium(iii) complex (μ-S4)[Yb(Tp(iPr2))(κ(1)-3,5-(i)Pr2Hpz)(κ(2)-3,5-(i)Pr2pz)]2 (Tp(iPr2) = hydro-tris(3,5-diisopropylpyrazolyl)borate), have been synthesized and structurally characterized by s...

Journal: :Materials advances 2022

Although lithium–sulfur batteries have high theoretical capacities (1675 mA h g −1 ), an irreversible charge/discharge process (shuttle effect) due to polysulfide and insulating lithium sulfide formation causes the death of battery cells.

Journal: :Chemical Communications 2021

A protocol for anti-Markovnikov hydroarylation of alkenes with aryl halides has been developed using polysulfide anions as photocatalysts in the presence Hantzsch ester and water under irradiation visible light.

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