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https://www.readbyqxmd.com/read/28429541/toward-practical-high-energy-batteries-a-modular-assembled-oval-like-carbon-microstructure-for-thick-sulfur-electrodes
#1
Yusheng Ye, Feng Wu, Yuting Liu, Teng Zhao, Ji Qian, Yi Xing, Wanlong Li, Jiaqi Huang, Li Li, Qianming Huang, Xuedong Bai, Renjie Chen
The modular assembly of microstructures from simple nanoparticles offers a powerful strategy for creating materials with new functionalities. Such microstructures have unique physicochemical properties originating from confinement effects. Here, the modular assembly of scattered ketjen black nanoparticles into an oval-like microstructure via double "Fischer esterification," which is a form of surface engineering used to fine-tune the materials surface characteristics, is presented. After carbonization, the oval-like carbon microstructure shows promise as a candidate sulfur host for the fabrication of thick sulfur electrodes...
April 21, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28425696/granadilla-inspired-structure-design-for-conversion-alloy-reaction-electrode-with-integrated-lithium-storage-behaviors
#2
Chaoji Chen, Linfeng Peng, Yiju Li, Lei Zhang, Jingwei Xiang, Pei Hu, Shijie Cheng, Yunhui Huang, Jia Xie
Conversion/alloy-reaction electrode materials promise much higher energy density than the commonly used ones based on intercalation chemistries. However, the low electronic conductivity, and specially the large volume expansion upon lithiation hinder their practical applications. Here for the first time, a unique granadilla-inspired structure was designed to prepare the conversion/alloy-reaction anode of carbon coated tin/calcium tin oxide (C@void@Sn/CaSnO3) ternary composite. The granadilla-inspired structure ensures the intimate contact between the Sn/CaSnO3 nanoparticles and the carbon matrix, providing not only conductive networks for electron transport and short distance for Li+ diffusion but also effective space for the electrode volume-expansion towards conversion/alloy reaction...
April 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28425544/in-situ-template-synthesis-of-hollow-nanospheres-assembled-from-nico2s4-c-ultrathin-nanosheets-with-high-electrochemical-activities-for-lithium-storage-and-orr-catalysis
#3
Xiaoyu Wu, Songmei Li, Bo Wang, Jianhua Liu, Mei Yu
Transition-metal sulfide hollow nanostructures have received intensive attention in energy-related applications due to their unique structural features and high electrochemical activities. Here, a well-designed composite of NiCo2S4@C is successfully fabricated using a facile in situ template removal method. The obtained composite shows unique microstructures of hollow nanospheres (∼650 nm in diameter) assembled from ultrathin NiCo2S4@C nanosheets, in which numerous scattered NiCo2S4 nanoparticles are embedded in ultrathin carbon nanosheets, exhibiting mesoporous features with a high surface area of 247...
April 20, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28424531/silicon-derived-from-glass-bottles-as-anode-materials-for-lithium-ion-full-cell-batteries
#4
Changling Li, Chueh Liu, Wei Wang, Zafer Mutlu, Jeffrey Bell, Kazi Ahmed, Rachel Ye, Mihrimah Ozkan, Cengiz S Ozkan
Every year many tons of waste glass end up in landfills without proper recycling, which aggravates the burden of waste disposal in landfill. The conversion from un-recycled glass to favorable materials is of great significance for sustainable strategies. Recently, silicon has been an exceptional anode material towards large-scale energy storage applications, due to its extraordinary lithiation capacity of 3579 mAh g(-1) at ambient temperature. Compared with other quartz sources obtained from pre-leaching processes which apply toxic acids and high energy-consuming annealing, an interconnected silicon network is directly derived from glass bottles via magnesiothermic reduction...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28422235/a-facile-mechanochemical-route-to-a-covalently-bonded-graphitic-carbon-nitride-g-c3n4-and-fullerene-hybrid-toward-enhanced-visible-light-photocatalytic-hydrogen-production
#5
Xiang Chen, Huanlin Chen, Jian Guan, Jieming Zhen, Zijun Sun, Pingwu Du, Yalin Lu, Shangfeng Yang
Graphitic carbon nitride (g-C3N4) as an emerging two-dimensional (2D) nanomaterial has been commonly used as a metal-free photocatalyst with potential applications in visible light photocatalytic water-splitting. However, the photocatalytic activity of g-C3N4 is quite low due to its relatively large band gap and the existence of contact resistance between the nanosheets. Herein we report for the first time the facile synthesis of a covalently bonded g-C3N4/C60 hybrid via a solid-state mechanochemical route and its application in photocatalytic hydrogen production under visible light...
April 19, 2017: Nanoscale
https://www.readbyqxmd.com/read/28422146/a-study-of-the-effects-of-synthesis-conditions-on-li5feo4-carbon-nanotube-composites
#6
Suk-Woo Lee, Hyun-Kyung Kim, Myeong-Seong Kim, Kwang Chul Roh, Kwang-Bum Kim
Li5FeO4/carbon nanotube (LFO/CNT) composites composed of sub-micron sized LFO and a nanocarbon with high electrical conductivity were successfully synthesized for the use as lithium ion predoping source in lithium ion cells. The phase of LFO in the composite was found to be very sensitive to the synthesis conditions, such as the heat treatment temperature, type of lithium salt, and physical state of the precursors (powder or pellet), due to the carbothermic reduction of Fe3O4 by CNTs during high temperature solid state reaction...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28419652/degradation-mechanisms-of-the-ethylene-carbonate-diethyl-carbonate-mixture-studied-by-radiolysis
#7
Furong Wang, Fanny Varenne, Daniel Ortiz, Valentin Pinzio, Mehran Mostafavi, Sophie LE Caer
The reactivity of ethylene carbonate (EC) and of the ethylene carbonate/diethyl carbonate (DEC) mixture is studied under ionizing radiation in order to mimic aging phenomena occurring in lithium-ion batteries. Picosecond pulse radiolysis experiments show that the attachment of the electron on EC molecule is ultrafast (k(e-EC + EC) = 1.3  109 L mol-1 s-1 at 46°C). In the case of the 50/50 EC/DEC mixture, just after the electron pulse, the electron is solvated by a mixture of EC and DEC molecules, but its fast decay is attributed to the electron attachment on the EC molecule exclusively...
April 16, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28417903/an-assessment-of-the-potential-use-of-bnnts-for-boron-neutron-capture-therapy
#8
Tiago H Ferreira, Marcelo C Miranda, Zildete Rocha, Alexandre S Leal, Dawidson A Gomes, Edesia M B Sousa
Currently, nanostructured compounds have been standing out for their optical, mechanical, and chemical features and for the possibilities of manipulation and regulation of complex biological processes. One of these compounds is boron nitride nanotubes (BNNTs), which are a nanostructured material analog to carbon nanotubes, but formed of nitrogen and boron atoms. BNNTs present high thermal stability along with high chemical inertia. Among biological applications, its biocompatibility, cellular uptake, and functionalization potential can be highlighted, in addition to its eased utilization due to its nanometric size and tumor cell internalization...
April 12, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28417305/uncovering-structural-diversity-of-unsaturated-fatty-acyls-in-cholesteryl-esters-via-photochemical-reaction-and-tandem-mass-spectrometry
#9
Jia Ren, Elissia T Franklin, Yu Xia
Mass spectrometry analysis of cholesteryl esters (CEs) faces several challenges, with one of them being the determination of the carbon-carbon double bond (C=C) locations within unsaturated fatty acyl chains. Paternὸ-Büchi (PB) reaction, a photochemical reaction based on the addition of acetone to C=C, is capable of C=C location determination when coupled with tandem mass spectrometry (MS/MS). In this study, the PB reaction conditions were tailored for CEs and subsequent nanoelectrospray ionization (nanoESI)...
April 17, 2017: Journal of the American Society for Mass Spectrometry
https://www.readbyqxmd.com/read/28416664/three-dimensional-stable-lithium-metal-anode-with-nanoscale-lithium-islands-embedded-in-ionically-conductive-solid-matrix
#10
Dingchang Lin, Jie Zhao, Jie Sun, Hongbin Yao, Yayuan Liu, Kai Yan, Yi Cui
Rechargeable batteries based on lithium (Li) metal chemistry are attractive for next-generation electrochemical energy storage. Nevertheless, excessive dendrite growth, infinite relative dimension change, severe side reactions, and limited power output severely impede their practical applications. Although exciting progress has been made to solve parts of the above issues, a versatile solution is still absent. Here, a Li-ion conductive framework was developed as a stable "host" and efficient surface protection to address the multifaceted problems, which is a significant step forward compared with previous host concepts...
April 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28414906/protecting-silicon-film-anodes-in-lithium-ion-batteries-using-an-atomically-thin-graphene-drape
#11
Shravan Suresh, Zi Ping Wu, Stephen F Bartolucci, Swastik Basu, Rahul Mukherjee, Tushar Gupta, Prateek Hundekar, Yunfeng Shi, Toh-Ming Lu, Nikhil Koratkar
Silicon (Si) shows promise as an anode material in lithium-ion batteries due to its very high specific capacity. However, Si is highly brittle, and in an effort to prevent Si from fracturing, the research community has migrated from the use of Si films to Si nanoparticle based electrodes. However, such a strategy significantly reduces volumetric energy density due to the porosity of Si nanoparticle electrodes. Here we show that contrary to conventional wisdom, Si films can be stabilized by two strategies: (a) anchoring the Si films to a carbon nanotube macrofilm (CNM) current collector and (b) draping the films with a graphene monolayer...
April 20, 2017: ACS Nano
https://www.readbyqxmd.com/read/28409919/atomic-layer-deposition-functionalized-carbonized-mesoporous-wood-fiber-for-high-sulfur-loading-lithium-sulfur-batteries
#12
Chao Luo, Hongli Zhu, Wei Luo, Fei Shen, Xiulin Fan, Jiaqi Dai, Yujia Liang, Chunsheng Wang, Liangbing Hu
Lithium-sulfur battery (LSB) as one of the most promising energy storage devices suffers from poor conductivity of sulfur and fast capacity decay triggered by the dissolution of polysulfides. In this work, functionalized carbonized mesoporous wood fiber (f-CMWF) is employed as a host to accommodate sulfur for the first time. Natural wood microfiber has unique hierarchical and mesoporous structure, which is well-maintained after carbonization. With such a hierarchical mesoporous structure, a high sulfur loading of 76 wt % is achieved in CMWF electrodes...
April 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28407378/new-morpholinium-and-piperidinium-based-ionic-liquids-functionalized-with-ethoxyethyl-side-chains-as-electrolyte-components-in-lithium-and-lithium-ion-batteries
#13
Maria Assunta Navarra, Kanae Fujimura, Mirko Sgambetterra, Akiko Tsurumaki, Stefania Panero, Nobufumi Nakamura, Hiroyuki Ohno, Bruno Scrosati
In the present work, two ionic liquids, N-ethoxyethyl-N-methylmorpholinium bis(trifluoromethanesulfonyl)imide (M1,2O2TFSI) and N-ethoxyethyl-N-methylpiperidinium bis(trifluoromethane-sulfonyl)imide (P1,2O2TFSI) have been synthesized and compared. Fundamental relevant properties, such as thermal and electrochemical stability, density and ionic conductivity were analyzed to evaluate the effects caused by the presence of the ether bond in the side chain and/or in the organic cation ring. Upon lithium salt addition, two electrolytes suitable for lithium batteries applications were found...
April 13, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28405955/cutaneous-adverse-reaction-during-lithium-treatment-a-case-report-and-updated-systematic-review-with-meta-analysis
#14
Martina Pinna, Mirko Manchia, Sergio Puddu, Giampaolo Minnai, Leonardo Tondo, Piergiorgio Salis
OBJECTIVES: To present a new case of adverse cutaneous reaction during lithium treatment and to update the systematic review and meta-analysis of the incidence of this adverse reaction. METHODS: We conducted a systematic search (performed in September 2016) for peer-reviewed articles in English indexed in Medline (2011-present). Meta-analytical estimates were obtained using the "Metafor" package. CASE PRESENTATION: Ms. H., a 31-year-old Caucasian woman with BD1, was admitted to the inpatient unit for a full-blown psychotic episode and treated with carbamazepine 400 mg q...
December 2017: International Journal of Bipolar Disorders
https://www.readbyqxmd.com/read/28401232/formation-of-porous-nitrogen-doped-carbon-coating-mno-nanospheres-for-advanced-reversible-lithium-storage
#15
Lingling Zhang, Danhua Ge, Genlong Qu, Junwei Zheng, Xueqin Cao, Hongwei Gu
Herein, we have developed a facile and effective approach for synthesizing a novel kind of porous nitrogen-doped carbon-coated MnO nanosphere. The porous Mn2O3 nanospheres are initially obtained by the calcination treatment of a coordination self-assembled aggregation precursor (referred to as Mn(OAc)2-C-8). Then, MnO@N-doped carbon composites (MnO@NCs) are obtained by the calcination of the Mn2O3 nanospheres coated with polydopamine (Mn2O3@PDA). The MnO@NCs are evaluated as an anode for lithium ion batteries (LIBs), which exhibit high specific capacity, stable cycling performance (1096...
April 12, 2017: Nanoscale
https://www.readbyqxmd.com/read/28393912/light-assisted-delithiation-of-lithium-iron-phosphate-nanocrystals-towards-photo-rechargeable-lithium-ion-batteries
#16
Andrea Paolella, Cyril Faure, Giovanni Bertoni, Sergio Marras, Abdelbast Guerfi, Ali Darwiche, Pierre Hovington, Basile Commarieu, Zhuoran Wang, Mirko Prato, Massimo Colombo, Simone Monaco, Wen Zhu, Zimin Feng, Ashok Vijh, Chandramohan George, George P Demopoulos, Michel Armand, Karim Zaghib
Recently, intensive efforts are dedicated to convert and store the solar energy in a single device. Herein, dye-synthesized solar cell technology is combined with lithium-ion materials to investigate light-assisted battery charging. In particular we report the direct photo-oxidation of lithium iron phosphate nanocrystals in the presence of a dye as a hybrid photo-cathode in a two-electrode system, with lithium metal as anode and lithium hexafluorophosphate in carbonate-based electrolyte; a configuration corresponding to lithium ion battery charging...
April 10, 2017: Nature Communications
https://www.readbyqxmd.com/read/28388080/solid-state-lithium-sulfur-batteries-operated-at-37-%C3%A2-c-with-composites-of-nanostructured-li7la3zr2o12-carbon-foam-and-polymer
#17
Xinyong Tao, Yayuan Liu, Wei Liu, Guangmin Zhou, Jie Zhao, Dingchang Lin, Chenxi Zu, Ouwei Sheng, Wenkui Zhang, Hyun-Wook Lee, Yi Cui
An all solid-state lithium-ion battery with high energy density and high safety is a promising solution for a next-generation energy storage system. High interface resistance of the electrodes and poor ion conductivity of solid-state electrolytes are two main challenges for solid-state batteries, which require operation at elevated temperatures of 60-90 °C. Herein, we report the facile synthesis of Al(3+)/Nb(5+) codoped cubic Li7La3Zr2O12 (LLZO) nanoparticles and LLZO nanoparticle-decorated porous carbon foam (LLZO@C) by the one-step Pechini sol-gel method...
April 12, 2017: Nano Letters
https://www.readbyqxmd.com/read/28387517/nitrogen-doped-hollow-carbon-nanospheres-for-high-performance-li-ion-batteries
#18
Yufen Yang, Song Jin, Zhen Zhang, Zhenzhen Du, Huarong Liu, Jia Yang, Hangxun Xu, Hengxing Ji
N-doped carbon materials is of particular attraction for anodes of lithium-ion batteries (LIBs) because of their high surface areas, superior electrical conductivity, and excellent mechanical strength, which can store energy by adsorption/desorption of Li(+) at the interfaces between the electrolyte and electrode. By directly carbonization of zeolitic imidazolate framework-8 nanospheres synthesized by an emulsion-based interfacial reaction, we obtained N-doped hollow carbon nanospheres with tunable shell thickness (20 nm to solid sphere) and different N dopant concentrations (3...
April 13, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28387408/fabrication-of-three-dimensional-ordered-macroporous-spinel-cofe2o4-as-efficient-bifunctional-catalysts-for-the-positive-electrode-of-lithium-oxygen-batteries
#19
Jong Guk Kim, Yuseong Noh, Youngmin Kim, Seonhwa Lee, Won Bae Kim
Three-dimensionally ordered macroporous (3DOM) CoFe2O4 (CFO) catalysts were prepared by using the colloidal crystal templating method to be used as bifunctional catalysts of Li-O2 battery positive electrodes. In order to study the relationship between the macropore diameter and charge/discharge behavior, 3DOM CFO catalysts with two different pore diameters of 140 and 60 nm were prepared. The physicochemical properties of the 3DOM CFO catalysts were investigated by scanning electron microscopy, X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and X-ray absorption spectroscopy...
April 20, 2017: Nanoscale
https://www.readbyqxmd.com/read/28384405/stable-li-plating-stripping-electrochemistry-realized-by-a-hybrid-li-reservoir-in-spherical-carbon-granules-with-3d-conducting-skeletons
#20
Huan Ye, Sen Xin, Ya-Xia Yin, Jin-Yi Li, Yu-Guo Guo, Li-Jun Wan
Lithium metal is a promising battery anode. However, inhomogeneous mass and charge transfers across the Li/electrolyte interface result in formation of dendritic Li and "dead" Li, and an unstable solid electrolyte interphase, which incur serious problems to impede its service in rechargeable batteries. Here we show that the above problems can be mitigated by regu-lating the interfacial mass/charge transfer. The key to our strategy is hybrid Li storage in onion-like, graphitized spherical C granules wired on a three-dimensional conducting skeleton, which enhances the negativity of surface charge of C host to contribute to a uniform Li plating, while also form stable Li/C intercalation compounds to offset any irreversible Li loss during cycling...
April 6, 2017: Journal of the American Chemical Society
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