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https://www.readbyqxmd.com/read/29676560/an-enhanced-lithium-oxygen-battery-using-a-glyme-electrolyte-and-carbon-nanotubes
#1
Lorenzo Carbone, Paolo Tomislav Moro, Mallory Gobet, Stephen Munoz, Matthew Devany, Steven G Greenbaum, Jusef Hassoun
The lithium oxygen battery has a theoretical energy density potentially meeting the challenging requirements of electric vehicles. However, safety concerns and short lifespan hinder its application in practical systems. In this work we show a cell configuration, including a multi-walled carbon nanotubes electrode (MWCNTs) and a lowly flammable glyme electrolyte, capable of hundreds of cycles without signs of decay. Nuclear magnetic resonance and electrochemical tests confirm the suitability of the electrolyte in a practical battery, while morphological and structural aspects revealed by electron microscopy and X-ray diffraction demonstrate the reversible formation and dissolution of lithium peroxide during the electrochemical process...
April 20, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29676411/functional-integration-and-self-template-synthesis-of-hollow-core-shell-carbon-mesoporous-spheres-fe-3-o-4-nitrogen-doped-graphene-to-enhance-catalytic-activity-in-dsscs
#2
Jixin Yao, Kang Zhang, Wen Wang, Xueqin Zuo, Qun Yang, Huaibao Tang, Mingzai Wu, Guang Li
Excellent corrosion resistance is crucial for photovoltaic devices to acquire high and stable performance under high corrosive complicated environments. Creative inspiration comes from sandwich construction, whereby Fe3O4 nanoparticles were anchored onto hollow core-shell carbon mesoporous microspheres and wrapped by N-graphene nanosheets (HCCMS/Fe3O4@N-RGO) to obtain integrated high corrosive resistance and stability. The as-prepared multiple composite material possesses outstanding performance as a result of structure optimization, performance improvement, and interface synergy...
April 20, 2018: Nanoscale
https://www.readbyqxmd.com/read/29676037/dual-layered-film-protected-lithium-metal-anode-to-enable-dendrite-free-lithium-deposition
#3
Chong Yan, Xin-Bing Cheng, Yang Tian, Xiang Chen, Xue-Qiang Zhang, Wen-Jun Li, Jia-Qi Huang, Qiang Zhang
Lithium metal batteries (such as lithium-sulfur, lithium-air, solid state batteries with lithium metal anode) are highly considered as promising candidates for next-generation energy storage systems. However, the unstable interfaces between lithium anode and electrolyte definitely induce the undesired and uncontrollable growth of lithium dendrites, which results in the short-circuit and thermal runaway of the rechargeable batteries. Herein, a dual-layered film is built on a Li metal anode by the immersion of lithium plates into the fluoroethylene carbonate solvent...
April 20, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29673129/the-electrochemical-performance-of-silicon-nanoparticles-in-concentrated-electrolyte
#4
Zenghua Chang, Jiantao Wang, Zhaohui Wu, Min Gao, Shuaijin Wu, Shigang Lu
Silicon is a promising material for anodes in energy storage devices. However, excessive growth of solid electrolyte interphase (SEI) caused by the severe volume change during the (de)lithiation processes lead to a dramatic capacity fading. Here we report a super-concentrated electrolyte composed of Lithium bis(fluorosulfonyl)imide (LiFSI) and propylene carbonate (PC) with a molar ratio of 1 to 2 to improve the cycling performance of silicon nano particles (SiNPs). The SiNP electrode shows a remarkably improved cycling performance with an initial delithiation capacity of ca...
April 19, 2018: ChemSusChem
https://www.readbyqxmd.com/read/29672028/electrochemically-switchable-ring-opening-polymerization-of-lactide-and-cyclohexene-oxide
#5
Miao Qi, Qi Dong, Dunwei Wang, Jeffery A Byers
An electrochemical method was developed for the redox switchable polymerization of lactide and an epoxide. Using a lithium reversible sacrificial electrode and a high surface area carbon working electrode, efficient transformation between formally iron(II) and iron(III) oxidation states of a bis(imino)pyridine iron alkoxide complex was possible, which led to the ability to activate the complex for ring opening polymerization reactions. In addition to serving as a redox trigger, an electrochemical toggle switch was developed in which the chemoselectivity for lactide and epoxide polymerization was altered in situ...
April 19, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29671567/high-rate-and-long-term-cycle-stability-of-li-s-batteries-enabled-by-li2s-tio2-impregnated-hollow-carbon-nanofiber-cathode
#6
Xinran Wang, Xuanxuan Bi, Shaona Wang, Yi Zhang, Hao Du, Jun Lu
The high theoretical energy density of lithium sulfur (Li-S) batteries makes them an alternative battery technology to lithium ion batteries. However, Li-S batteries suffer from the low sulfur loading, poor charge transport, and dissolution of lithium polysulfide. In this study, we use the lithiated S, Li2S, as the cathode material, coupled with electrospun TiO2-impregnated hollow carbon nanofibers (TiO2-HCFs) which serve as the conductive agent and protective barrier for Li2S in Li-S batteries. TiO2-HCFs provide much improved electron/ionic conductivity and serve as a physical barrier which prevents the dissolution of lithium polysulfides...
April 19, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29667345/recent-advances-on-porous-carbon-materials-for-electrochemical-energy-storage
#7
Libin Wang, Xianluo Hu
The climate change and energy crisis promote the rapid development of electrochemical energy-storage devices. Of many intriguing physicochemical properties such as excellent chemical stability, high electronic conductivity and large specific surface area, porous carbon materials have always been considering as a promising candidate for electrochemical energy storage. Up to date, a wide variety of porous carbon materials upon molecular design, pore control and compositional tailoring have been proposed for energy-storage applications...
April 17, 2018: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/29665682/hierarchical-fe2o3-c-mno2-c-multi-shell-nanocomposites-for-high-performance-lithium-ion-battery-and-catalyst
#8
Yu Zhang, Qing Li, Jiwei Liu, Wenbin You, Fang Fang, Min Wang, Renchao Che
The Fe2O3@C@MnO2@C (FCMC) nanocomposites containing spindle-like Fe2O3 as a core and MnO2 nanosheets as a sandwiched shell and double carbon layers have been successfully prepared by a facile method. As anode materials of lithium ion batteries (LIBs), the cycling stability, rate performance and conductivity of the prepared FCMC are far beyond that of the carbon-free Fe2O3@MnO2 (FM) nanocomposites. The hierarchical structure with double layers of carbon effectively enhances the ion conductivity and electrochemical performance of transitional metal oxides, indicating that carbon in FCMC played an important role during lithium ion storage...
April 17, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29665267/stabilizing-lithium-sulfur-batteries-through-control-of-sulfur-aggregation-and-polysulfide-dissolution
#9
Qian Liu, Jianhua Zhang, Shu-Ang He, Rujia Zou, Chaoting Xu, Zhe Cui, Xiaojuan Huang, Guoqiang Guan, Wenlong Zhang, Kaibing Xu, Junqing Hu
Lithium-sulfur (Li-S) batteries are investigated intensively as a promising large-scale energy storage system owing to their high theoretical energy density. However, the application of Li-S batteries is prevented by a series of primary problems, including low electronic conductivity, volumetric fluctuation, poor loading of sulfur, and shuttle effect caused by soluble lithium polysulfides. Here, a novel composite structure of sulfur nanoparticles attached to porous-carbon nanotube (p-CNT) encapsulated by hollow MnO2 nanoflakes film to form p-CNT@Void@MnO2 /S composite structures is reported...
April 17, 2018: Small
https://www.readbyqxmd.com/read/29659252/polyvinyl-alcohol-assisted-fabrication-of-hollow-carbon-spheres-reduced-graphene-oxide-nanocomposites-for-high-performance-lithium-ion-battery-anodes
#10
Yunqiang Zhang, Qiang Ma, Shulan Wang, Xuan Liu, Li Li
Three-dimensional hollow carbon spheres/reduced graphene oxide (DHCSs/RGO) nanocomposites with high-level heteroatom doping and hierarchical pores are fabricated via a versatile method. Polyvinyl alcohol (PVA) that serves as dispersant and nucleating agent is used as the non-removal template for synthesizing melamine resin (MR) spheres with abundant heteroatoms which are subsequently composited with graphene oxide (GO). Use of PVA and implementation of freezing treatment prevent agglomeration of MR spheres within GO network...
April 16, 2018: ACS Nano
https://www.readbyqxmd.com/read/29659248/sno-2-c-vo-2-composite-hollow-nanospheres-as-an-anode-material-for-lithium-ion-batteries
#11
Wenbin Guo, Yong Wang, Qingyuan Li, Dongxia Wang, Fanchao Zhang, Yiqing Yang, Yang Yu
Porous SnO2@C@VO2 composite hollow nanospheres have been ingeniously constructed through the combination of layer-by-layer deposition and redox reaction. Moreover, to optimize the electrochemical properties, SnO2@C@VO2 composite hollow nanospheres with different contents of the external VO2 have been also studies. On the one hand, the elastic and conductive carbon as interlayer in the SnO2@C@VO2 composite can not only buffer the huge volume variation during repetitive cycling, but also effectively improve electronic conductivity and enhance the utilizing rate of SnO2 and VO2 with high theoretical capacity...
April 16, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29656651/tio2-photocatalysis-in-aromatic-redox-tag-guided-intermolecular-formal-2-2-cycloadditions
#12
Yohei Okada, Naoya Maeta, Kaii Nakayama, Hidehiro Kamiya
Since the pioneering work by Macmillan, Yoon, and Stephenson, homogeneous photoredox catalysis has occupied a central place in new reaction development in the field of organic chemistry. While heterogeneous semiconductor photocatalysis has also been studied extensively, it has generally been recognized as a redox option in inorganic chemistry where such "photoca-talysis" is most often used to catalyze carbon-carbon bond cleavage, and not in organic chemistry where bond formation is usu-ally the focal point...
April 15, 2018: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/29656188/inhibition-of-the-dopamine-transporter-as-an-animal-model-of-bipolar-disorder-mania-locomotor-response-neuroimmunological-profile-and-pharmacological-modulation
#13
Juliana R Bastos, Katherinne M Perico, Érica L Marciano Vieira, Antônio L Teixeira, Fabiana S Machado, Aline S de Miranda, Fabrício A Moreira
Inhibition of dopamine transporter (DAT) by GBR12909 has been proposed as a pharmacological model of mania related to bipolar disorder (BD). Here we tested the hypothesis that GBR12909 injection impairs habituation and induces hyperlocomotion in mice, along with changes in cytokines and neurotrophic factors levels, as observed in BD patients. We also tested if lithium carbonate, sodium valproate and aripiprazole prevent GBR12909-induced locomotion. Male Swiss mice received GBR12909 (15 mg/kg) injections and locomotor responses were quantified in an open field...
April 6, 2018: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/29652482/tunable-free-standing-core-shell-cnt-mose2-anode-for-lithium-storage
#14
Muhammad Yousaf, Yunsong Wang, Yijun Chen, Zhipeng Wang, Waseem Aftab, Asif Mahmood, Wei Wang, Shaojun Guo, Ray P S Han
Heterogeneous nanostructuring of MoSe2 over carbon nanotube (CNT) sponge as a free standing electrode not only bring higher performance but also, eliminates the need for dead elements such as a binder, conductive carbon and supportive current collectors. Further, the porous CNT sponge can be easily compacted via an in-tense densification of the active material MoSe2 to produce an electrode with a high mass loading for a signif-icantly improved areal capacity. In this work, we present a tunable coating of MoSe2 on a CNT sponge to fab-ricate a core-shell MoSe2@CNT anode...
April 13, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29648436/towards-high-performance-lithium-sulfur-batteries-upcycling-of-ldpe-plastic-into-sulfonated-carbon-scaffold-via-microwave-promoted-sulfonation
#15
Patrick J Kim, Harif D Fontecha, Kyungho Kim, Vilas G Pol
Lithium sulfur batteries have been intensively explored during last decades as next-generation batteries due to the high energy density of 2600 Wh kg-1 and low cost. However, systemic challenges, mainly associated polysulfide shuttling and low Coulombic efficiency, plague the practical utilization of sulfur cathode in battery market. In order to address the issues mentioned above, many approaches have been investigated by tailoring the surface characterisitics and porosities of carbon scaffold. In this article, we first present a facile and effective strategy of preparing porous sulfonated carbon (PSC) from low density polyethylene (LDPE) plastic via microwave-promoted sulfonation...
April 12, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29643345/fluorinated-reduced-graphene-oxide-as-a-protective-layer-on-the-metallic-lithium-for-application-in-the-high-energy-batteries
#16
Jernej Bobnar, Matic Lozinšek, Gregor Kapun, Christian Njel, Rémi Dedryvère, Boštjan Genorio, Robert Dominko
Metallic lithium is considered to be one of the most promising anode materials since it offers high volumetric and gravimetric energy densities when combined with high-voltage or high-capacity cathodes. However, the main impediment to the practical applications of metallic lithium is its unstable solid electrolyte interface (SEI), which results in constant lithium consumption for the formation of fresh SEI, together with lithium dendritic growth during electrochemical cycling. Here we present the electrochemical performance of a fluorinated reduced graphene oxide interlayer (FGI) on the metallic lithium surface, tested in lithium symmetrical cells and in combination with two different cathode materials...
April 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29629134/a-highly-efficient-double-hierarchical-sulfur-host-for-advanced-lithium-sulfur-batteries
#17
Linyu Hu, Chunlong Dai, Jin-Myoung Lim, Yuming Chen, Xin Lian, Minqiang Wang, Yi Li, Penghao Xiao, Graeme Henkelman, Maowen Xu
Li-S batteries have attracted enormous interest due to their potentially high energy density, non-toxicity and the low cost of sulfur. The main challenges of sulfur cathodes are the short cycling life and limited power density caused by the low conductivity of sulfur and dissolution of Li polysulfides. Here we design a new double-hierarchical sulfur host to address these problems. Hierarchical carbon spheres (HCSs), constructed from building blocks of hollow carbon nanobubbles for loading sulfur, are sealed within a thin, polar MoS2 coating composed of ultrathin nanosheets...
January 21, 2018: Chemical Science
https://www.readbyqxmd.com/read/29624888/polysulfide-binding-to-several-nanoscale-tino2n-1-magn%C3%A3-li-phases-by-simple-synthesis-in-carbon-for-efficient-and-long-life-high-mass-loaded-lithium-sulfur-battery-cathodes
#18
Usman Zubair, Julia Amici, Carlotta Francia, David McNulty, Silvia Bodoardo, Colm O'Dwyer
In Li-S batteries, it is important to ensure efficient reversible conversion of sulfur to lithium polysulfide (LiPS). Shuttling effects caused by LiPS dissolution can lead to reduced performance and cycle life. While carbons rely on physical trapping of polysulfides, polar oxide surfaces can chemically bind LiPS to improve the stability of sulfur cathodes. We show a simple synthetic method allowing high sulfur loading into mesoporous carbon, pre-loaded with spatially localized nanoparticles of several Magnéli phase titanium oxide, TinO2n-1...
April 6, 2018: ChemSusChem
https://www.readbyqxmd.com/read/29620848/an-integrated-interface-strategy-towards-room-temperature-solid-state-lithium-batteries
#19
Jiangwei Ju, Yantao Wang, Bingbing Chen, Jun Ma, Shanmu Dong, Jingchao Chai, Hongtao Qu, Longfei Cui, Xiuxiu Wu, Guanglei Cui
Solid-state lithium batteries have drawn wide attention to address the safety issues of power batteries. However, the development of solid-state lithium batteries is substantially limited by the poor electrochemical performances originating from the rigid interface between solid electrodes and solid-state electrolytes. In this work, a composite of poly(vinyl carbonate) and Li10SnP2S12 solid-state electrolyte is fabricated successfully via in-situ polymerization to improve the rigid interface issues. The composite electrolyte presents a considerable room temperature conductivity of 0...
April 5, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29618781/recycling-waste-soot-from-merchant-ships-to-produce-anode-materials-for-rechargeable-lithium-ion-batteries
#20
Won-Ju Lee, Han Vin Kim, Jae-Hyuk Choi, Gasidit Panomsuwan, Young-Chan Lee, Beom-Seok Rho, Jun Kang
In this study, the waste soot generated by ships was recycled to produce an active material for use in lithium-ion batteries (LIBs). Soot collected from a ship was graphitized by a heat treatment process and used as an anode active material. It was confirmed that the graphitized soot was converted into a highly crystalline graphite, and was found to form carbon nano-onions with an average diameter of 70 nm. The graphitized soot showed a high discharge capacity and an excellent cycle life, with a reversible capacity of 260 mAhg-1 even after 150 cycles at a rate of 1 C...
April 4, 2018: Scientific Reports
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