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Energy storage

Carolina M Pusec, Adam De Jesus, Md Wasim Khan, Alexander R Terry, Anton E Ludvik, Kai Xu, Nicholas Giancola, Haaris Pervaiz, Emily Daviau Smith, Xianzhong Ding, Stephen Harrison, Navdeep S Chandel, Thomas C Becker, Nissim Hay, Hossein Ardehali, Jose Cordoba-Chacon, Brian T Layden
Glucokinase (GCK) is the principal hexokinase (HK) in the liver, operating as a glucose sensor to regulate glucose metabolism and lipid homeostasis. Recently, we proposed Hexokinase Domain Containing-1 (HKDC1) to be a novel 5th HK with expression in the liver. Here, we reveal HKDC1 to have low glucose-phosphorylating ability and demonstrate its association with the mitochondria in hepatocytes. As we have shown previously that genetic deletion of HKDC1 leads to altered hepatic triglyceride levels, we also explored the influence of overexpression of HKDC1 in hepatocytes on cellular metabolism observing reduced glycolytic capacity and maximal mitochondrial respiration with concurrent reductions in glucose oxidation and mitochondrial membrane potential...
December 3, 2018: Endocrinology
Keyi Chen, Ye Zhang, Chilin Li
Metal-polysulfide batteries are attracting broad attentions as conversion reaction systems of high theoretical energy density and low cost. However, their further applications are hindered by low loading of active species, excess conductive additive and loose (nanostructured) electrode network. Herein, we propose that compact grain stacking and surface fluorination are two crucial factors for achieving high-rate and long-life pyrite (FeS2) cathode enabled by sulfurating ionic liquid wrapped open framework fluorides...
December 5, 2018: ACS Nano
Sai Wang, Xin-Bo Zhang
Na-ion batteries (NIBs) are ideal candidates for solving the problem of large-scale energy storage, due to the worldwide sodium resource, but the efforts in exploring and synthesizing low-cost and eco-friendly anode materials with convenient technologies and low-cost raw materials are still insufficient. Herein, with the assistance of a simple calcination method and common raw materials, the environmentally friendly and nontoxic N-doped C@Zn3 B2 O6 composite is directly synthesized and proved to be a potential anode material for NIBs...
December 5, 2018: Advanced Materials
Jianfang Wu, Bo-Wei Pu, Da Wang, Siqi Shi, Ning Zhao, Xiangxin Guo, Xin Guo
Introduction of inorganic solid electrolytes is believed to be an ultimate strategy to dismiss dendritic Li in high-energy Li-metal batteries (LMBs), and garnet-type Li7La3Zr2O12 (LLZO) electrolytes are impressive candidates. However, the current density for stable Li plating/stripping in LLZO is still quite limited. Here we create in-situ formed Li-deficient shields by the high-temperature calcination at 900 °C. By this novel process, the formation of Li2CO3 on LLZO is restrained, and then we successfully obtain Li2CO3-free LLZO after removing the Li-deficient compounds...
December 5, 2018: ACS Applied Materials & Interfaces
Luojiang Zhang, K N Hui, K S Hui, Siu Wing Or
High performance of an electrode relies largely on scrupulous design of nanoarchitectures and smart hybridization of bespoke active materials. Here, a 3D heterostructured core-shell architecture was fabricated as a supercapacitor electrode, in which Co3O4 nanowire cores were grown on nickel foam prior to the in situ deposition of layered double hydroxide (LDH) nanosheet shells. Owing to the unique configuration and hybridization, the as-fabricated Co3O4@LDH core-shell electrode exhibited high capacities of 818...
December 5, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
Pengfei Feng, Mengya Kong, Yiwei Yang, Pingru Su, Changfu Shan, Xiaoxi Yang, Jing Cao, Weisheng Liu, Wei Feng, Yu Tang
With the rapid development of information science, it is urgent that memory devices possessing high security, density, and desirable storage ability should be developed. In this work, a smart duplicato-responsive of stimuli and time-gates nanohybrid based on variable valence Eu2+/Eu3+ co-encapsulated has been fabricated and act as active material in the multi-level and multi-dimensional memory devices. The luminescence lifetime of Eu3+ in this nanohybrid performed a stimuli-response due to the energy level of the coordinated ligand could be modulated...
December 5, 2018: ACS Applied Materials & Interfaces
Yingjie Li, Bolong Huang, Yingjun Sun, Mingchuan Luo, Yong Yang, Yingnan Qin, Lei Wang, Chunji Li, Fan Lv, Weiyu Zhang, Shaojun Guo
The development of cost-efficient, active, and stable electrode materials as bifunctional catalysts for electrochemical water splitting is crucial to high-performance renewable energy storage and conversion devices. In this work, the synthesis of Co-based multi-metal borides nanochains with amorphous structure is reported for boosting the oxygen evolution (OER) and hydrogen evolution reactions (HER) by one-pot NaBH4 reduction of Co2+ , Ni2+ , and Fe2+ under ambient temperature. In all the investigated Co-based metal borides, NiCoFeB nanochains show the excellent OER performance with a low overpotential of 284 mV at 10 mA cm-2 and Tafel slope of 46 mV dec-1 , respectively, together with excellent catalytic stability, and robust HER performance with an overpotential of 345 mV at 10 mA cm-2 ...
December 5, 2018: Small
Ping Wang, Huan Ye, Ya-Xia Yin, Hao Chen, Yin-Bing Bian, Zhuo-Ren Wang, Fei-Fei Cao, Yu-Guo Guo
The growth of white-rot fungi is related to the superior infiltrability and biodegradability of hyphae on a lignocellulosic substrate. The superior biodegradability of fungi toward plant substrates affords tailored microstructures, which benefits subsequently high efficient carbonization and chemical activation. Here, the mechanism underlying the direct growth of mushrooms toward the lignocellulosic substrate is elucidated and a fungi-enabled method for the preparation of porous carbons with ultrahigh specific surface area (3439 m2 g-1 ) is developed...
December 5, 2018: Advanced Materials
Qing Zhao, Michael J Zachman, Wajdi I Al Sadat, Jingxu Zheng, Lena F Kourkoutis, Lynden Archer
Electrochemical cells based on aluminum (Al) are of long-standing interest because Al is earth abundant, low cost, and chemically inert. The trivalent Al3+ ions also offer among the highest volume-specific charge storage capacities (8040 mAh cm-3 ), approximately four times larger than achievable for Li metal anodes. Rapid and irreversible formation of a high-electrical bandgap passivating Al2 O3 oxide film on Al have, to date, frustrated all efforts to create aqueous Al-based electrochemical cells with high reversibility...
November 2018: Science Advances
Talitha C Ford, Luke A Downey, Tamara Simpson, Grace McPhee, Chris Oliver, Con Stough
A diet rich in B-group vitamins is essential for optimal body and brain function, and insufficient amounts of such vitamins have been associated with higher levels of neural inflammation and oxidative stress, as marked by increased blood plasma homocysteine. Neural biomarkers of oxidative stress quantified through proton magnetic spectroscopy (1H-MRS) are not well understood, and the relationship between such neural and blood biomarkers is seldom studied. The current study addresses this gap by investigating the direct effect of 6-month high-dose B-group vitamin supplementation on neural and blood biomarkers of metabolism...
December 1, 2018: Nutrients
Alexandre Poulhazan, Alexandre A Arnold, Dror E Warschawski, Isabelle Marcotte
Starch is the most abundant energy storage molecule in plants and is an essential part of the human diet. This glucose polymer is composed of amorphous and crystalline domains in different forms (A and B types) with specific physicochemical properties that determine its bioavailability for an organism, as well as its value in the food industry. Using two-dimensional (2D) high resolution solid-state nuclear magnetic resonance (SS-NMR) on 13 C-labelled starches that were obtained from Chlamydomonas reinhardtii microalgae, we established a complete and unambiguous assignment for starch and its constituents (amylopectin and amylose) in the two crystalline forms and in the amorphous state...
November 30, 2018: International Journal of Molecular Sciences
Cheng Chen, Mengqiang Wu, Ziqiang Xu, Tingting Feng, Jian Yang, Zhi Chen, Sizhe Wang, Yuesheng Wang
Presently, carbon-based anodes for energy storage, such as graphite for lithium-ion batteries (LlBs) and hard carbon for sodium-ion batteries (SlBs), have low capacity and poor rate properties. However, the capacity and rate capability of these anodes can be improved via morphological control, doping and using nanostructures. In this report, a series of self-assembled N-doped porous carbon nanocomposites (NPCNs) were prepared via pyrolysis of metal-organic frameworks (MOFs)-ZIF-8/carbon nanocomposites grown on various carbon frameworks (1D CNT and/or 2D rGO)...
November 27, 2018: Journal of Colloid and Interface Science
Xiaoyu Jiang, Xingwei Liu, Ziqi Zeng, Lifen Xiao, Xinping Ai, Hanxi Yang, Yuliang Cao
Most of the currently developed sodium-ion batteries (SIBs) have potential safety hazards due to the use of highly volatile and flammable alkyl carbonate electrolytes. To overcome this challenge, we report an electrochemically compatible and nonflammable electrolyte, tris(2,2,2-trifluoroethyl) phosphate (TFEP) with low-concentration sodium bis(fluorosulfonyl)imide (0.9 M), which is designed not only to match perfectly with the hard carbon (HC) anode but also to enhance the thermal stability of SIBs. Experimental results and theoretical calculations reveal that TFEP molecules have a significantly low barrier to decompose before Na+ inserts into HC, forming a stable inorganic solid-electrolyte interface layer, thus improving the electrochemical and structural stabilities of HC anodes...
November 15, 2018: iScience
Ming-Jie Yin, Qiang Zhao, Jushuai Wu, Karoline Seefeldt, Jiayin Yuan
Porous poly(ionic liquid)s (PILs) recently have been actively serving as a multifunctional, interdisciplinary materials platform in quite a few research areas, including separation, catalysis, actuator, sensor, and energy storage, just to name a few. In this context, the capability to photo-pattern PIL microstructures in a porous state on a substrate is still missing but is a crucial step for their real industrial usage. Here, we developed a method for in situ rapid patterning of porous PIL microstructures via a maskless photolithography approach coupled with a simple electrostatic complexation treatment...
December 4, 2018: ACS Nano
Hong Fu, Mengqi Li, Ruimin Ni, Yangming Martin Lo
Two different fish oil preparations, namely triglycerides and ethyl esters containing, respectively, 30.02% and 74.38% of omega-3 fatty acids, were employed as the substrates for transesterification. Catalyzed by immobilized lipase using imidazolium-based ionic liquid systems, the total content of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) in the resulting triglyceride reached 63.60% when 4% hydrophobic ionic liquid was used, which was 11.74% higher than that of the triglyceride produced in a solvent-free reaction system...
November 2018: Food Science & Nutrition
Martin C F Cheng, Gianluca Sarà, Gray A Williams
Organisms can mitigate the effects of long term variation in environmental conditions through acclimation, which involves changes in various physiological responses. To elucidate the possible effects of temperature and food concentrations on acclimation capacity, physiological responses of the mussel, Perna viridis, were measured after individuals were held for six weeks under varying temperatures and food availability. Warm-acclimated mussels experiencing higher food levels had significantly greater upper thermal limits than those maintained on lower food levels...
December 2018: Journal of Thermal Biology
Dimitri Niks, Russ Hille
Two factors, climate change brought on by rising atmospheric CO2 levels and the accelerating shift toward renewable energy sources, have together worked to heighten interest in understanding how biological catalysts so effectively bring about the reduction of CO2 to formate, with potential applications for both bioremediation and energy storage. Most metal-dependent formate dehydrogenases, containing either molybdenum or tungsten in their active sites, function physiologically in the direction of formate oxidation to CO2 , but it has become clear that many, if not all, are also effective in catalyzing the reverse reaction...
2018: Methods in Enzymology
John A Noel, Laurent Kreplak, Nuwansiri Nirosh Getangama, John R de Bruyn, Mary Anne White
Saturated fatty acids are an exceptionally important class of liquids, used in many consumer products and suggested as phase change materials (PCMs) for thermal energy storage, in part because they crystallize with minimal supercooling. Here we investigate fatty acid nucleation to understand why crystallization is so facile, as a step toward identifying potential mechanisms for the suppression of supercooling in other PCMs. We find that fatty acid supercooling can be induced only if the liquid is first heated above a material-dependent threshold temperature...
December 3, 2018: Journal of Physical Chemistry. B
Hao Jia, Na Sun, Mahmut Dirican, Ya Li, Chen Chen, Pei Zhu, Chaoyi Yan, Jun Zang, Jiansheng Guo, Jinsong Tao, Jiasheng Wang, Fangcheng Tang, Xiangwu Zhang
An innovative nano carbon network material was synthesized from electrospun Kraft lignin (KL) and cellulose acetate (CA) blend nanofibers after carbonization at 1000 oC in nitrogen atmosphere and its electrochemical performance was evaluated as an anode material in sodium-ion batteries (SIBs). Apart from its unique network architecture, introduced carbon material possesses high oxygen content of 13.26%, wide interplanar spacing of 0.384 nm and large specific surface area of 540.95 m2∙g-1. The electrochemical test results demonstrate that this new nano carbon network structure delivers a reversible capacity of 340 mAh∙g-1 at a current density of 50 mA∙g-1 after 200 cycles and exhibits high rate capacity by delivering a capacity of 103 mAh∙g-1 at an increased current density of 400 mA∙g-1...
December 3, 2018: ACS Applied Materials & Interfaces
Zifeng Wang, Funian Mo, Longtao Ma, Qi Yang, Guojin Liang, Zhuoxin Liu, Hongfei Li, Na Li, Haiyan Zhang, Chunyi Zhi
The fast advancement in flexible and wearable electronics has put up with new requirements on the energy storage device with improved tolerance to deformation apart from offering power output. Despite the tremendous progress in stretchable energy storage devices, the compressional energy storage devices have indeed received limited research attention. In this work, an intrinsically compressible rechargeable battery was proposed using the Zn-MnO2 chemistry and a crosslinked polyacrylamide (PAAm) hydrogel electrolyte...
December 3, 2018: ACS Applied Materials & Interfaces
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